CN109174960A - A kind of high-efficiency plant extraction restorative procedure of uranium contaminated soil - Google Patents
A kind of high-efficiency plant extraction restorative procedure of uranium contaminated soil Download PDFInfo
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- CN109174960A CN109174960A CN201810953966.5A CN201810953966A CN109174960A CN 109174960 A CN109174960 A CN 109174960A CN 201810953966 A CN201810953966 A CN 201810953966A CN 109174960 A CN109174960 A CN 109174960A
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- 239000002689 soil Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 55
- 229910052770 Uranium Inorganic materials 0.000 title claims description 69
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 title claims description 69
- 238000000605 extraction Methods 0.000 title description 3
- 241000196324 Embryophyta Species 0.000 claims abstract description 66
- 240000008564 Boehmeria nivea Species 0.000 claims abstract description 58
- 239000003337 fertilizer Substances 0.000 claims abstract description 25
- 238000009331 sowing Methods 0.000 claims abstract description 12
- 238000003306 harvesting Methods 0.000 claims abstract description 10
- 238000012545 processing Methods 0.000 claims abstract description 5
- 210000003608 fece Anatomy 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 239000000835 fiber Substances 0.000 claims description 18
- 239000010871 livestock manure Substances 0.000 claims description 17
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 12
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 10
- 239000004202 carbamide Substances 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 241000228245 Aspergillus niger Species 0.000 claims description 6
- 241000589152 Azotobacter chroococcum Species 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 235000011201 Ginkgo Nutrition 0.000 claims description 6
- 235000008100 Ginkgo biloba Nutrition 0.000 claims description 6
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 6
- 229910021538 borax Inorganic materials 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 239000002105 nanoparticle Substances 0.000 claims description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Substances OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 6
- -1 phosphoric acid diamines Chemical class 0.000 claims description 6
- 239000001103 potassium chloride Substances 0.000 claims description 6
- 235000011164 potassium chloride Nutrition 0.000 claims description 6
- 239000004328 sodium tetraborate Substances 0.000 claims description 6
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 241000235342 Saccharomycetes Species 0.000 claims description 5
- RMOGWMIKYWRTKW-UONOGXRCSA-N (S,S)-paclobutrazol Chemical compound C([C@@H]([C@@H](O)C(C)(C)C)N1N=CN=C1)C1=CC=C(Cl)C=C1 RMOGWMIKYWRTKW-UONOGXRCSA-N 0.000 claims description 4
- 239000005985 Paclobutrazol Substances 0.000 claims description 4
- 238000000855 fermentation Methods 0.000 claims description 4
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 claims description 3
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 claims description 3
- 238000010410 dusting Methods 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 3
- 230000004151 fermentation Effects 0.000 claims description 3
- 230000004720 fertilization Effects 0.000 claims description 3
- 235000019837 monoammonium phosphate Nutrition 0.000 claims description 3
- 239000006012 monoammonium phosphate Substances 0.000 claims description 3
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 claims description 3
- 229910052939 potassium sulfate Inorganic materials 0.000 claims description 3
- 235000011151 potassium sulphates Nutrition 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 230000007480 spreading Effects 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 2
- 238000009333 weeding Methods 0.000 claims description 2
- 241000218628 Ginkgo Species 0.000 claims 2
- 241000894006 Bacteria Species 0.000 claims 1
- 240000004808 Saccharomyces cerevisiae Species 0.000 claims 1
- 238000011081 inoculation Methods 0.000 claims 1
- 239000002028 Biomass Substances 0.000 abstract description 12
- 230000008439 repair process Effects 0.000 abstract description 10
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- 238000005516 engineering process Methods 0.000 abstract description 3
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- 230000009545 invasion Effects 0.000 abstract description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 13
- 229910052785 arsenic Inorganic materials 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 239000000419 plant extract Substances 0.000 description 7
- 238000012546 transfer Methods 0.000 description 7
- 240000007171 Imperata cylindrica Species 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 6
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 6
- 229910052793 cadmium Inorganic materials 0.000 description 6
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 235000017822 Melilotus officinalis Nutrition 0.000 description 5
- 240000000366 Melilotus officinalis Species 0.000 description 5
- 238000005067 remediation Methods 0.000 description 5
- 240000004507 Abelmoschus esculentus Species 0.000 description 4
- 244000026873 Alternanthera philoxeroides Species 0.000 description 4
- 235000009328 Amaranthus caudatus Nutrition 0.000 description 4
- 240000001592 Amaranthus caudatus Species 0.000 description 4
- 235000009051 Ambrosia paniculata var. peruviana Nutrition 0.000 description 4
- 235000003097 Artemisia absinthium Nutrition 0.000 description 4
- 240000001851 Artemisia dracunculus Species 0.000 description 4
- 235000017731 Artemisia dracunculus ssp. dracunculus Nutrition 0.000 description 4
- 235000003261 Artemisia vulgaris Nutrition 0.000 description 4
- 235000010662 Bidens pilosa Nutrition 0.000 description 4
- 241000219198 Brassica Species 0.000 description 4
- 235000003351 Brassica cretica Nutrition 0.000 description 4
- 235000003343 Brassica rupestris Nutrition 0.000 description 4
- 235000007542 Cichorium intybus Nutrition 0.000 description 4
- 244000298479 Cichorium intybus Species 0.000 description 4
- 244000285790 Cyperus iria Species 0.000 description 4
- 244000194101 Ginkgo biloba Species 0.000 description 4
- 244000157344 Kyllinga brevifolia Species 0.000 description 4
- 240000007849 Macleaya cordata Species 0.000 description 4
- 244000137827 Rumex acetosa Species 0.000 description 4
- 240000004110 Russelia equisetiformis Species 0.000 description 4
- 241000219094 Vitaceae Species 0.000 description 4
- 241001251949 Xanthium sibiricum Species 0.000 description 4
- 235000012735 amaranth Nutrition 0.000 description 4
- 239000004178 amaranth Substances 0.000 description 4
- 244000110989 ambatch Species 0.000 description 4
- 239000001138 artemisia absinthium Substances 0.000 description 4
- QKSKPIVNLNLAAV-UHFFFAOYSA-N bis(2-chloroethyl) sulfide Chemical compound ClCCSCCCl QKSKPIVNLNLAAV-UHFFFAOYSA-N 0.000 description 4
- 235000021021 grapes Nutrition 0.000 description 4
- 238000005065 mining Methods 0.000 description 4
- 235000010460 mustard Nutrition 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 4
- 231100000419 toxicity Toxicity 0.000 description 4
- 230000001988 toxicity Effects 0.000 description 4
- GNKZMNRKLCTJAY-UHFFFAOYSA-N 4'-Methylacetophenone Chemical compound CC(=O)C1=CC=C(C)C=C1 GNKZMNRKLCTJAY-UHFFFAOYSA-N 0.000 description 3
- 241000143476 Bidens Species 0.000 description 3
- 244000178993 Brassica juncea Species 0.000 description 3
- 241001478750 Chlorophytum comosum Species 0.000 description 3
- 240000000491 Corchorus aestuans Species 0.000 description 3
- 235000011777 Corchorus aestuans Nutrition 0.000 description 3
- 235000010862 Corchorus capsularis Nutrition 0.000 description 3
- 244000020551 Helianthus annuus Species 0.000 description 3
- 235000003222 Helianthus annuus Nutrition 0.000 description 3
- 240000008436 Ipomoea aquatica Species 0.000 description 3
- 235000019004 Ipomoea aquatica Nutrition 0.000 description 3
- 244000088415 Raphanus sativus Species 0.000 description 3
- 235000006140 Raphanus sativus var sativus Nutrition 0.000 description 3
- 235000015807 Rumex acetosa ssp. acetosa Nutrition 0.000 description 3
- 235000015447 Rumex acetosa ssp. alpestris Nutrition 0.000 description 3
- 235000015448 Rumex acetosa ssp. ambiguus Nutrition 0.000 description 3
- 235000015437 Rumex acetosa ssp. arifolius Nutrition 0.000 description 3
- 235000015436 Rumex acetosa ssp. lapponicus Nutrition 0.000 description 3
- 235000015441 Rumex acetosa ssp. pseudoxyria Nutrition 0.000 description 3
- 235000015439 Rumex acetosa ssp. thyrsiflorus Nutrition 0.000 description 3
- 240000006394 Sorghum bicolor Species 0.000 description 3
- 240000000324 Tradescantia zebrina Species 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000010863 uranium mill tailing Substances 0.000 description 3
- 235000004051 Aeschynomene indica Nutrition 0.000 description 2
- 244000144706 Aeschynomene indica Species 0.000 description 2
- 241001435059 Artemisia argyi Species 0.000 description 2
- 235000010894 Artemisia argyi Nutrition 0.000 description 2
- 241000051984 Blepharidachne Species 0.000 description 2
- 235000014698 Brassica juncea var multisecta Nutrition 0.000 description 2
- 240000005865 Brassica juncea var. tumida Species 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 2
- 241000223782 Ciliophora Species 0.000 description 2
- 241000233838 Commelina Species 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 240000008415 Lactuca sativa Species 0.000 description 2
- 235000003228 Lactuca sativa Nutrition 0.000 description 2
- 240000003433 Miscanthus floridulus Species 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 241000222393 Phanerochaete chrysosporium Species 0.000 description 2
- 244000046052 Phaseolus vulgaris Species 0.000 description 2
- 244000134540 Polymnia sonchifolia Species 0.000 description 2
- 235000003406 Polymnia sonchifolia Nutrition 0.000 description 2
- 235000011684 Sorghum saccharatum Nutrition 0.000 description 2
- 244000186513 Trema orientalis Species 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910052787 antimony Inorganic materials 0.000 description 2
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052745 lead Inorganic materials 0.000 description 2
- 238000001543 one-way ANOVA Methods 0.000 description 2
- 238000006862 quantum yield reaction Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 235000003934 Abelmoschus esculentus Nutrition 0.000 description 1
- 241000448435 Acalypha australis Species 0.000 description 1
- 241000272525 Anas platyrhynchos Species 0.000 description 1
- 241001083841 Aquatica Species 0.000 description 1
- 244000075850 Avena orientalis Species 0.000 description 1
- 235000007319 Avena orientalis Nutrition 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 244000104272 Bidens pilosa Species 0.000 description 1
- 241001649247 Boehmeria Species 0.000 description 1
- 235000011332 Brassica juncea Nutrition 0.000 description 1
- 235000014700 Brassica juncea var napiformis Nutrition 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 235000006481 Colocasia esculenta Nutrition 0.000 description 1
- 244000205754 Colocasia esculenta Species 0.000 description 1
- 241000233839 Commelina communis Species 0.000 description 1
- BWGNESOTFCXPMA-UHFFFAOYSA-N Dihydrogen disulfide Chemical compound SS BWGNESOTFCXPMA-UHFFFAOYSA-N 0.000 description 1
- 235000011511 Diospyros Nutrition 0.000 description 1
- 244000236655 Diospyros kaki Species 0.000 description 1
- 241001348731 Lactuca dolichophylla Species 0.000 description 1
- 235000019082 Osmanthus Nutrition 0.000 description 1
- 241000333181 Osmanthus Species 0.000 description 1
- 235000007094 Phaseolus vulgaris var humilis Nutrition 0.000 description 1
- 244000001666 Phaseolus vulgaris var. humilis Species 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 235000005291 Rumex acetosa Nutrition 0.000 description 1
- 235000003434 Sesamum indicum Nutrition 0.000 description 1
- 244000040738 Sesamum orientale Species 0.000 description 1
- 235000007230 Sorghum bicolor Nutrition 0.000 description 1
- 241000218215 Urticaceae Species 0.000 description 1
- 244000290333 Vanilla fragrans Species 0.000 description 1
- 235000009499 Vanilla fragrans Nutrition 0.000 description 1
- 235000012036 Vanilla tahitensis Nutrition 0.000 description 1
- 229910007568 Zn—Ag Inorganic materials 0.000 description 1
- DQELGSOAMSBOSD-UHFFFAOYSA-N [Bi].[Mo].[Sn].[W] Chemical compound [Bi].[Mo].[Sn].[W] DQELGSOAMSBOSD-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- YYRMJZQKEFZXMX-UHFFFAOYSA-L calcium bis(dihydrogenphosphate) Chemical compound [Ca+2].OP(O)([O-])=O.OP(O)([O-])=O YYRMJZQKEFZXMX-UHFFFAOYSA-L 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 235000018927 edible plant Nutrition 0.000 description 1
- 210000000416 exudates and transudate Anatomy 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000019691 monocalcium phosphate Nutrition 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 238000010149 post-hoc-test Methods 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 229910052957 realgar Inorganic materials 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
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- 239000000758 substrate Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
- B09C1/105—Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B79/00—Methods for working soil
- A01B79/02—Methods for working soil combined with other agricultural processing, e.g. fertilising, planting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mycology (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Botany (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Biotechnology (AREA)
- General Health & Medical Sciences (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Environmental & Geological Engineering (AREA)
- Cultivation Of Plants (AREA)
Abstract
本发明提供了一种铀污染土壤的高效植物提取修复方法，该方法包括如下步骤：(1)对受铀污染土壤进行整地并施用基肥；(2)播种品种为湘苎7号的苎麻种子；(3)出苗长出新叶之后，施用生长肥；(4)对生长后的苎麻进行收割。本发明的方法可以对铀污染土壤进行有效的修复，所用的苎麻不进入食物链、生长迅速、生物量大、栽培技术成熟、植保措施完善、耐性强、地下根茎体积小、便于收割与集中处理、不存在生物入侵问题，是一种经济、方便、效率高、生态效益好的修复铀污染土壤的方法。The invention provides a high-efficiency phytoextraction and restoration method for uranium-contaminated soil. The method comprises the following steps: (1) preparing the soil and applying base fertilizer to the uranium-contaminated soil; (2) sowing ramie seeds of Xianglimie No. 7; (3) After the seedlings grow new leaves, applying growth fertilizer; (4) Harvesting the grown ramie. The method of the invention can effectively repair the uranium-contaminated soil, the ramie used does not enter the food chain, grows rapidly, has a large biomass, mature cultivation technology, perfect plant protection measures, strong tolerance, small underground rhizomes, convenient harvesting and centralized processing, There is no biological invasion problem, and it is an economical, convenient, efficient and ecologically beneficial method for remediating uranium-contaminated soil.
Description
Technical field
The invention belongs to contaminated soil remediation technical fields, and in particular to a kind of high-efficiency plant extraction of uranium contaminated soil is repaired
Compound method.
Background technique
Uranium (U) is both heavy metal and a kind of nucleic, has strong toxicity.China is mining big country, is successively built
A large amount of uranium mining area and uranium tailings pond are found.The mean concentration of China's topsoil (0-20cm) uranium is 3.03mg.kg-1,
And the U concentration of uranium tailings pond slag and contaminated soil is up to 26.11-122.1mg.kg-1.The mine generated is smelted in the exploitation of uranium ore
Slag, barren rock are polluted to caused by surrounding soil, farmland and water body, and the time is long and harmfulness is big, to around mine environment and people
The healthy and safe of the people masses constitutes serious threat.Therefore, it is one for the reparation of uranium contaminated soil urgently to be resolved to ask
Topic.
Nineteen eighty-three, American scientist Chaney are put forward for the first time phytoremediation technology.Compared to traditional restorative procedure, plant
Recovery technique has the advantages that the uniqueness such as safety, green, economy, is divided into four kinds according to its feature and purposes: plant extract (plant
Pollutant is removed from soil), phytovolatilization (plant by volatile pollutant removal), rhizosphere filtering (root system of plant from
Remove pollutant in the liquid of flowing), plant fix that (soil is changed into the lower form of toxicity by plant, but not from soil
Removal).Heavy metal pollution reparation for soil is generally fixed using plant extract and plant.
Phytoremediation circle generally assert that ideal landfill plant is super enriching plant at present.And it is heavy metal super-enriched
Four essential characteristics of plant are: (1) critical content feature: super enriching plant aerial part dry weight content is greater than centainly critical
Value；(2) transfer characteristic: the content of aerial part should be higher than that under ground portion；(3) patience characteristic: super enriching plant is to toxic contaminants
Object tolerance is high, particularly, the unobvious decline of Aboveground Biomass of Young when being grown on polluted soil；(4) concentration coefficient is special
Sign: concentration coefficient > 1 or even > 10.Numerous scientific workers are directed to the screening of uranium enriching plant, have carried out a large amount of research.
Although not yet finding the super enriching plant of uranium at present, it has been found that more than 20 plants have preferable enrichment energy to uranium element
Power, such as Indian mustard (Brassica juncea), sunflower (Helianthus annuus), dyers' grapes (Phytocacca
Americana L.), it is hot pickled mustard tuber (B.juncea var.tumida Tsen et Lee), argy wormwood (Artemisia argyi), yellow
Vanilla sweet-scented osmanthus (Melilotus officinalis), mountain jute (Trema orientalis), ambatch (Aeschynomene
Indica), Caulis Miscanthis floriduli (Miscanthus floridulus), cogongrass (Imperata cylindrica), macleaya cordata
(Macleaya cordata), kyllinga brevifolia (Kyllinga brevifolia), Herba chloranthi japonici Lettuce (Lactuca
Dolichophylla Kitam.), bracketplant (Chlorophytum comosum), dayflower (Commelina communis),
Iron amaranth (Acalypha australis L.), garden sorrel (Rumex acetosa Linn), witloof (Cichorium intybus
L.), fountain plant (Amaranth), water spinach (I aquatica Forsk), kidney bean (Phaseolus vulgaris
Var.humilis Alef), sorghum (Sorghum bicolor (L.) Moench), alternanthera philoxeroides (Alternanthera
Philoxeroides (Mart.) Griseb.), beggar-ticks (Bidens pilosa), Siberian cocklebur (Xanthium sibiricum),
Okra (Abelmoschus esculentus L.), cyperus iria (Cyperus iria L.), wandering jew (Zebrina
Pendula), yacon (Saussure a involucrata) etc..
Scholars also proposed it is various the above uranium enriching plant is used for the specific method of uranium contaminated soil remediation, but remain
In some problems:
(1) if rehabilitation plant belongs to the edible plants such as vegetables or fruit (such as Indian mustard, sunflower, hot pickled mustard tuber, the four seasons
Fragrant Lettuce, water spinach, witloof, kidney bean, sorghum, okra, yacon), then exist and enters food chain, eaten by mistake and serious by people
Influence the material risk of human health.
(2) dyers' grapes, argy wormwood, Melilot, ambatch, Caulis Miscanthis floriduli, cogongrass, macleaya cordata, kyllinga brevifolia, bracketplant, duck
Plantar grass, iron amaranth, garden sorrel, fountain plant, alternanthera philoxeroides, beggar-ticks, Siberian cocklebur, cyperus iria, wandering jew, hot pickled mustard tuber, Herba chloranthi japonici naked oats
The herbaceous plant biomass such as dish, water spinach, witloof is small, low so as to cause remediation efficiency.
(3) dyers' grapes, argy wormwood, Melilot, mountain jute, ambatch, Caulis Miscanthis floriduli, cogongrass, macleaya cordata, kyllinga brevifolia,
The plant protection measure of the wild plants such as dayflower, iron amaranth, garden sorrel, fountain plant, alternanthera philoxeroides, beggar-ticks, Siberian cocklebur, cyperus iria is not
It is perfect, lack the mature technology of large-scale plantation.
(4) the tolerance index of the not clear quantitative study uranium enriching plant of certain methods, such as hot pickled mustard tuber (B.juncea
Var.tumida Tsen et Lee), argy wormwood (Artemisia argyi), Melilot (Melilotus
Officinalis), mountain jute (Trema orientalis), ambatch (Aeschynomene indica), Caulis Miscanthis floriduli
(Miscanthus floridulus), cogongrass (Imperata cylindrica)；Or research has shown that tolerance is poor, such as
Okra, fountain plant.The tolerance of uranium enriching plant is indefinite or tolerance is poor, will directly affect repairing effect.
(5) uranium contaminated soil is usually associated with other heavy metal pollutions, and certain uranium enriching plants lack to various heavy
Repair ability.
(6) most uranium enriching plants are root enriching plants, many scholars do not study its root exudates and
Rhizosphere surrounding soil environment is after rhizosphere is enriched with, and whether the activity of uranium reduces or whether toxicity weakens, and is just used for plant
It is fixed to repair.If the activity of uranium does not reduce or toxicity does not weaken after plant is fixed, if butt rot, a toxic huge sum of money
Category will return to soil, and the purpose for repairing pollution is not achieved.
(7) if using instruction plant, such as dyers' grapes carry out pollution amelioration, and large-scale plantation is likely to cause biology
Invasion problem.
Ramie (Boehmeria nivea), the perennial undershrub of Urticaceae Section of Genus Boehmeria or shrub, are the fibres for originating in China
Industrial crops are tieed up, some places in the Neolithic Age middle and lower reach of Yangtze River just have plantation, are known as " China's grass " in the world.World's ramie
Numb yield accounts for 90% of Gross World Product or so with Largest In China, and Brazil, Philippine occupy two, three, Indonesia, Korea,
There are a small amount of plantation in Vietnam and other countries in Southeast Asia, and Mediterranean Region also has artificial culture and successfully reports.
Authorization Notice No. discloses one kind for the Chinese patent of CN102919040B and plants on heavy metal intermediate pollution soil
Plant the method for ramie, cadmium, lead, arsenic, chromium, nickel, copper and the zinc that can be passivated in soil；Its object is to improve heavy-metal contaminated soil
Economic benefit, and for passivation after heavy metal can keep being passivated for a long time, plant ramie after soil heavy metal pollution
Whether situation, which makes moderate progress, is not directed to.
The Chinese patent of Publication No. CN108015104A discloses a kind of ramie of remediating heavy metal cadmium pollution soil
Numb implantation methods, but this method is only 0.47 and 0.52, respectively less than 1 for the concentration coefficient of cadmium respectively, institute is attainable
Repairing effect is extremely limited.
In order to improve ramie for the repairing effect of heavy metal, those skilled in the art have carried out some good tries.
The Chinese patent of Publication No. CN102165889A discloses a kind of for improving to Pb and As contaminated soil remediation
The ramie planting method of ability, this method can be improved by making between carrying out ramie and ciliate desert-grass to Pb and As contaminated soil
Repair ability.
The Chinese patent of Publication No. CN107952793A discloses a kind of is combined using Phanerochaete chrysosporium and ramie
The method in repairing and treating heavy metal pollution farmland, this method by by Phanerochaete chrysosporium and ramie combination, improve for
The repair ability of cadmium, arsenic and lead-contaminated soil.
But the research how repaired to uranium contaminated soil using plant extract repair mode is also less, and obtains
Achievement it is unsatisfactory.Therefore, the research of this respect is that this field is needed.
Summary of the invention
In view of the deficiencies of the prior art and demand, the purpose of the present invention is to provide a kind of high-efficiency plants of uranium contaminated soil
Restorative procedure is extracted, described method includes following steps:
(1) to being carried out site preparation and applying base manure by uranium contaminated soil；
(2) the ramie seed that sowing kind is Hunan ramie 7；
(3) after emergence grows young leaves, application growth fertilizer；
(4) ramie after growth is gathered in；
Wherein, it is described by uranium content in uranium contaminated soil be 25-175 μ g/g；
The base manure obtains by the following method:
1) by weight, prepare the following raw material:
8 parts of nano-sized carbon, 32 parts of urea, 6 parts of phosphoric acid diamines, 10 parts of potassium chloride, 6 parts of plant ash, 25 parts of dung polluted water, orange peel 12
Part, 3 parts of borax, 12 parts of ginkgo leaf, 1 part of azotobacter chroococcum, 2 parts of saccharomycete, 0.5 part of aspergillus niger；
2) nano-sized carbon, urea, phosphoric acid diamines, potassium chloride, plant ash, dung polluted water and borax are mixed, is stirred evenly, is inoculated with
Water is added in the ratio of solid and liquid weight ratio 1:100 in saccharomycete and azotobacter chroococcum, in the fermenter at 35-40 DEG C, anaerobic hair
Ferment 12-15 days, take tunning；
3) ginkgo leaf and orange peel are crushed, water are added in the ratio of solid and liquid weight ratio 1:8, stands 1 day at 20-25 DEG C,
Adjustment water content is 50-60%, and inoculated aspergillus niger carries out pile fermentation, when temperature reaches 60 DEG C, turning 1 time, and hereafter turning
3-4 times to maintain the temperature at 65-75 DEG C until decomposed, then spreading sunning to water content out is 20-25%；
4) step 2) and step 3) gains are mixed to get the base manure；
By weight, the formula of the growth fertilizer are as follows:
10 parts of paclobutrazol, 200 parts of urea, 40 parts of potassium sulfate, 150 parts of monoammonium phosphate.
In step (1), the method for the site preparation are as follows: after weeding, deep plough 0.3-0.4 meters, guarantee loosing soil, keep furrow face
Width is 2-4 meters.
In step (2), the method taken of sowing is that hand sowing method or dusting cover sieve broadcast method.The seedling root system of seed seedling-raising
Powerful, especially radish root is flourishing, is conducive to the uranium pollution for making full use of the under ground portion rhizome of ramie to extract soil, and inhale
It is strong to receive rich water ability, guarantees the vigorous growth of ramie, so the present invention is planted by the way of sowing.When mean daily temperature is 12
DEG C or more can sow
In step (2), when carrying out the sowing, application rate is 75 kilograms of seeds of every sq-km soil.
The amount of application of the base manure is 5 × 106Kg/ sq-km.
The fertilization mode of the growth fertilizer is that primary every fertilising in 5-7 days after seedling grows young leaves, each amount of application is
100g/ plants.
Before step (3) when emergence, thinning is carried out, density is 0.3m × 0.45m, every 2 young plant of cave.
In step (4), when correct fiber crops are gathered in, aerial part is gathered in when black bar reaches 2/3；Two fiber crops are gathered in
When, aerial part is gathered in when black bar reaches 2/3；After three fiber crops are mature, part above and below the ground is gathered in respectively.
After carrying out the harvesting, the recycling and processing of uranium are carried out.One of desirable method are as follows: on the ground by the ramie of harvesting
Part is concentrated respectively under ground portion dries burning, and aerial part ash content lower for uranium content can be filled；And for
The higher under ground portion ash content of uranium content, can further progress uranium recycling.
The study found that san ramie is often pioneer or the dominant plant in minery or smeltery's Tailings Dam, have
Shao Shui, few fertilizer are adapted to, the fine quality of Heavy Metal Contamination Stress is endured.The arsenic disulfide shimen Hunan realgar tail of Fia
Near sand dam, arsenic content is up to 284.9 μ g/g, only grows ciliate desert-grass, ramie；The arsenic content of ramie leaf reaches 536 μ g/g DW.
The persimmon bamboo plantation tungsten tin bismuth molybdenum composite ore mining area dressing plant the Cai Shan vegetal cover degree of Hunan Province's Chenzhou City only 5%, only Four Plants
Growth, ramie is one of them.Hunan Lengshuijiang Near Antimony Mine Area, 9 sampled point Sb contents are more than national soil background 40-
11503 times, but ramie belongs to dominant plant in this 9 sampled points.Ramie has enrichment to make on arsenic, cadmium, lead, antimony, copper, zinc etc.
With.Golconda Pb-Zn-Ag ore ramie sample has reached cadmium, the plant of lead super enrichment in critical content feature and two indexs of transfer characteristic
The standard of object.Shimen Hunan, Lengshuijiang, the mining area of Liuyang 3 ramie overground part Cd content it is bigger than the Cd content of general plant
2-10 times, As content is 9.9-147.5 times big, and Sb content is 1.2-338.4 times big；Cd concentration coefficient and transfer ratio peak are
2.07 with 3；As concentration coefficient and transfer ratio peak are 1.04 and 12.42, and Sb concentration coefficient and transfer ratio peak are
1.91 with 9.04.
The present inventor has carried out the sampling of 15 kinds of dominant plants in certain uranium tailings pond and analysis is tested, wherein ramie
Uranium accumulation ability and transfer ability it is most strong, sample root, stem, leaf uranium content be respectively 21.552,22.439 and
44.264 μ g/g, hence it is evident that higher than the 7.980 μ g/g of uranium content of its rhizosphere soil, concentration coefficient and transfer ratio are respectively 3.028
With 1.642, there is good uranium to be enriched with potential quality.
Inventor then uses ramie 7, artificial culture ramee variety Hunan to carry out the enrichment of ramie uranium and the potting of patience characteristic
Experiment.With 25,75,125,175,275,375,485 μ g/g, 7 various concentration uranium using saturation moisture capacity method preparation experiment soil
Earth, 4 repetitions of each concentration.Hunan ramie 7 uranium concentration coefficients and enrichments are calculated separately by stem, leaf, aerial part, under ground portion
Amount.The results showed that when soil uranium content is 25-175 μ g/g, Hunan ramie 7 uranium entirety concentration coefficients and under ground portion
Concentration coefficient increases with soil uranium content and is increased, respectively 1.200-1.834 and 1.460-2.341 (Fig. 1).Hunan ramie 7
Biomass and its under ground portion (table 1) is concentrated mainly on to the accumulation of uranium.By the maximum photochemistry amount of different uranium concentration for the treatment of
Suboutput, Aboveground Biomass of Young, plant height, root long average value and CK group average value carried out one-way analysis of variance (α=
0.05), and Tolerance index is calculated.To maximum Photochemical quantum yield, the aerial part of homogeneity test of variance conspicuousness > 0.05
Biomass, plant height carry out one-way analysis of variance using two methods of LSD and Duncan respectively.And homogeneity test of variance conspicuousness
< 0.05 root long is carried out respectively using tetra- kinds of Tamhane, Dunnett T3, Games-Howell (A), Dunnett C methods
The Multiple range test of post-hoc tests, comparison result show different disposal concentration group between without notable difference (table 2).It can be seen that Hunan ramie 7
Culture substrate number to uranium concentration between 25-485 μ g/g has quite high tolerance.
Since ramie is concentrated mainly on underground rhizome part (numb pocket) to the enrichment of uranium and association heavy metal, so by ramie
For the planting link of plant extract rehabilitating soil uranium pollution, carried out around the development of numb pocket is promoted as far as possible.Seed seedling-raising
Seedling root system it is powerful, especially radish root is flourishing, is conducive to the uranium for making full use of the under ground portion rhizome of ramie to extract soil
Pollution.
Above-mentioned discovery shows that ramie has natural abundance ability, patience strong uranium, and inventor passes through many experiments
After groping, after base manure and growth fertilizer of the invention are applied in discovery, the biomass of ramie and the richness for uranium can be significantly improved
Collection ability is more conducive to the reparation (table 3) of uranium contaminated soil, further improves and repairs uranium using it in a manner of plant extract
The efficiency of contaminated soil.In addition, ramie does not enter, food chain, growth is rapid, biomass is big, cultivation technique is mature, plant protection measure
It is perfect, underground rhizome is small in size, convenient for harvesting with centralized processing, be not present biotic intrusion problem.Therefore, using ramie as plant
Object, which extracts, repairs uranium contaminated soil with good application prospect.
Beneficial effects of the present invention:
Method of the invention can carry out efficient plant extract reparation to uranium contaminated soil, and ramie used does not enter food
Object chain, growth are rapidly, biomass is big, cultivation technique is mature, plant protection measure is perfect, patience is strong, underground rhizome is small in size, convenient for receipts
It cuts and focuses on, there is no biotic intrusion problem, the present invention is a kind of economic, reparation conveniently, high-efficient, profitable on ecology
The method of uranium contaminated soil.
Detailed description of the invention
Fig. 1 is the uranium content result figure of ramie No. 7 each sections in Hunan under comparative example different disposal concentration of the present invention.
Specific embodiment
The present invention is specifically described below by embodiment, it is necessary to which indicated herein is that following embodiment is only used
It is further detailed in the present invention, should not be understood as limiting the scope of the invention, which is skilled in technique
Some nonessential modifications and adaptations that personnel are made according to foregoing invention content, still fall within protection scope of the present invention.
Embodiment 1
(1) site preparation and base manure are applied: first being extirpated weeds, killed subterranean pest-insect with a little pesticide.Deep ploughing is thin whole, general to require
0.3-0.4 meters of deep ploughing guarantees loosing soil；Wide general 2 meters of furrow face or so, according to topography, soil layer difference can width to 3-4 meters；Application
Base manure, the amount of application of base manure are 5 × 106Kg/ sq-km.
Above-mentioned base manure obtains by the following method:
1) by weight, prepare the following raw material:
8 parts of nano-sized carbon, 32 parts of urea, 6 parts of phosphoric acid diamines, 10 parts of potassium chloride, 6 parts of plant ash, 25 parts of dung polluted water, orange peel 12
Part, 3 parts of borax, 12 parts of ginkgo leaf, 1 part of azotobacter chroococcum, 2 parts of saccharomycete, 0.5 part of aspergillus niger；
2) nano-sized carbon, urea, phosphoric acid diamines, potassium chloride, plant ash, dung polluted water and borax are mixed, is stirred evenly, is inoculated with
Water is added in the ratio of solid and liquid weight ratio 1:100 in saccharomycete and azotobacter chroococcum, in the fermenter at 35-40 DEG C, anaerobic hair
Ferment 15 days, take tunning；
3) ginkgo leaf and orange peel are crushed, water are added in the ratio of solid and liquid weight ratio 1:8, stands 1 day at 20-25 DEG C,
Adjustment water content is 50-60%, and inoculated aspergillus niger carries out pile fermentation, when temperature reaches 60 DEG C, turning 1 time, and hereafter turning
3-4 times to maintain the temperature at 65-75 DEG C until decomposed, then spreading sunning to water content out is 20-25%；
Step 2) and step 3) gains are mixed to get the base manure；
(2) it sows.The seedling root system of seed seedling-raising is powerful, and especially radish root is flourishing, is conducive to make full use of ramie
Under ground portion rhizome extracts the uranium pollution of soil, and absorption rich water ability is strong, guarantees the vigorous growth of ramie, so of the invention
It is planted by the way of sowing.When mean daily temperature can be sowed at 12 DEG C or more.Repair 1km2Contaminated soil need 75kg
Seed.It broadcasts method using hand sowing method or dusting cover sieve and repeatedly sows back and forth.At 20 DEG C of mean daily temperature or so, a week
Emergence.According to emergence, in due course thinning.Planting density is advisable with 0.3m × 0.45m, the numb seedling in 2 plants of every cave.
(3) fertilising and management in growth period.Yangtze river basin ramie can receive for three seasons for 1 year, and general head fiber crops are at the end of May on June
In ten days, two numb late July to early Augusts, three fiber crops are in late October.After emergence grows young leaves, application growth fertilizer.Growth fertilizer is applied
Fertile mode are as follows: primary every fertilising in 5-7 days after seedling grows young leaves, each amount of application is 100g/ plants.By weight, raw
The formula to flesh up are as follows:
10 parts of paclobutrazol, 200 parts of urea, 40 parts of potassium sulfate, 150 parts of monoammonium phosphate.
In actual use, above-mentioned formula material is dissolved in 100000 parts of water and is applied fertilizer.
(4) head fiber crops, two fiber crops harvestings.After the numb straw of head grows into the regular period, the speed of growth obviously slows down, from top to bottom by
Gradual change is brown, suberification tissue occurs, and when black bar reaches 2/3, and lower part sesame slices fall off, and taper hand is pinched constantly, and the numb root and stem of certain plants, which has been sprouted, " urges
When root and stem of certain plants fiber crops " (two fiber crops), the harvesting of head fiber crops aerial part is carried out at this time.The new talent of sprouting continues to grow as two fiber crops, two dark bars
Its aerial part is gathered in after 2/3.
(5) three fiber crops harvestings: its aerial part is gathered in together under ground portion after after late October, three fiber crops are mature.
(6) focus on: the ramie aerial part of harvesting and under ground portion concentration dried into burning, ash content can further into
The processing such as row recycling uranium, landfill.
Comparative example
It is adjusted as follows on the basis of embodiment 1:
Base manure used is based on farmyard manure, supplemented by chemical fertilizer, slow-release fertilizer and quick-acting fertilizer cooperation, specific fertilizer and its every square
Km is used to be farmyard manure 15 × 106kg、3×106Kg dung polluted water, calcium superphosphate 37500kg.
Grow the application of fertilizer are as follows: when head fiber crops, two fiber crops, three Taro Asos are long vigorous, application growth fertilizer grows the fertilization mode of fertilizer
Are as follows: primary every fertilising in 5-7 days after seedling grows young leaves, each amount of application is 100g/ plants.By weight, fertilizer is grown
Formula are as follows:
10 parts of paclobutrazol, urea 200.
In actual use, above-mentioned formula material is dissolved in 100000 parts of water and is applied fertilizer.
For the technical effect for investigating embodiment 1 and comparative example, the present invention verified using potted plant experiment, with 25,75,
125,175,275,375,485 μ g/g, 7 various concentration uranium use saturation moisture capacity method preparation experiment soil, each concentration 4
It repeats.Uranium concentration coefficient and enriching quantity are calculated separately by stem, leaf, aerial part, under ground portion.In concrete operations, only
It does not need to carry out corresponding site preparation operation, other the step of operating with above-mentioned record are consistent.To embodiment 1 and comparative example
As a result it is detected, the result of comparative example is as shown in Fig. 1, Tables 1 and 2.It is found that Hunan ramie 7 for the uranium in uranium contaminated soil
With enrichment.Fertilizer used by comparative example is common fertilizer, we are significant to increase by changing applied fertilizer
Strong accumulation ability of the ramie for uranium.
From potted plant experiment it is found that the present invention can significantly increase accumulation ability, raising remediation efficiency of the ramie to uranium, have
Good plant extract repair function.In practical applications, it is only necessary to be used for big Tanaka according to the method for the present invention.
No. 7 Underground biomass of Hunan ramie and uranium accumulation and its proportion under 1 comparative example different disposal concentration of table
Hunan ramie 7 patience characteristics under 2 different disposal concentration of table
Note: ramie character Value Data is that (Aboveground Biomass of Young n=4, maximum are photochemical for mean+/-standard error in table 2
Learn quantum yield, plant height, root long n=8).
No. 7 Underground biomass of Hunan ramie and uranium accumulation and its proportion under 3 embodiment of table, 1 different disposal concentration
Claims (9)
1. a kind of high-efficiency plant of uranium contaminated soil extracts restorative procedure, which is characterized in that described method includes following steps:
(1) to being carried out site preparation and applying base manure by uranium contaminated soil；
(2) the ramie seed that sowing kind is Hunan ramie 7；
(3) after emergence grows young leaves, application growth fertilizer；
(4) ramie after growth is gathered in；
Wherein, it is described by uranium content in uranium contaminated soil be 25-175 μ g/g.
The base manure obtains by the following method:
1) by weight, prepare the following raw material:
8 parts of nano-sized carbon, 32 parts of urea, 6 parts of phosphoric acid diamines, 10 parts of potassium chloride, 6 parts of plant ash, 25 parts of dung polluted water, 12 parts of orange peel,
3 parts of borax, 12 parts of ginkgo leaf, 1 part of azotobacter chroococcum, 2 parts of saccharomycete, 0.5 part of aspergillus niger；
2) nano-sized carbon, urea, phosphoric acid diamines, potassium chloride, plant ash, dung polluted water and borax are mixed, is stirred evenly, inoculation yeast
Water, in the fermenter at 35-40 DEG C, anaerobic fermentation is added in the ratio of solid and liquid weight ratio 1:100 in bacterium and azotobacter chroococcum
12-15 days, take tunning；
3) ginkgo leaf and orange peel are crushed, water is added in the ratio of solid and liquid weight ratio 1:8, stands 1 day at 20-25 DEG C, adjusts
Water content is 50-60%, inoculated aspergillus niger, carries out pile fermentation, when temperature reaches 60 DEG C, turning 1 time, and hereafter turning 3-4
It is secondary to maintain the temperature at 65-75 DEG C until decomposed, then spreading sunning to water content out is 20-25%；
4) step 2) and step 3) gains are mixed to get the base manure；
By weight, the formula of the growth fertilizer are as follows:
10 parts of paclobutrazol, 200 parts of urea, 40 parts of potassium sulfate, 150 parts of monoammonium phosphate.
2. the method according to claim 1, wherein in step (1), the method for the site preparation are as follows: deep after weeding
0.3-0.4 meters are ploughed, guarantees loosing soil, keeping furrow face width is 2-4 meters.
3. the method according to claim 1, wherein the method taken of sowing is hand sowing method in step (2)
Or dusting cover sieve broadcasts method.
4. method according to claim 1 or 3, which is characterized in that in step (2), when carrying out the sowing, application rate is
75 kilograms of seeds of every sq-km soil.
5. the method according to claim 1, wherein the amount of application of the base manure is 5 × 106Kg/ sq-km.
6. the method according to claim 1, wherein the fertilization mode of the growth fertilizer is to grow young leaves in seedling
Primary every fertilising in 5-7 days later, each amount of application is 100g/ plants.
7. the method according to claim 1, wherein carrying out thinning, density 0.3m before step (3) when emergence
× 0.45m, every 2 young plant of cave.
8. the method according to claim 1, wherein when correct fiber crops are gathered in, being reached in black bar in step (4)
Aerial part is gathered in when to 2/3；When gathering in two fiber crops, aerial part is gathered in when black bar reaches 2/3；It is mature in three fiber crops
Afterwards, part above and below the ground is gathered in.
9. according to the method described in claim 8, it is characterized in that, after carrying out the harvesting, carry out uranium centralized recovery and
Processing.
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Application publication date: 20190111 |