CN113179695B - Method for converting hydrophobic soil into hydrophilic soil under rainfall or irrigation conditions - Google Patents
Method for converting hydrophobic soil into hydrophilic soil under rainfall or irrigation conditions Download PDFInfo
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- CN113179695B CN113179695B CN202110578865.6A CN202110578865A CN113179695B CN 113179695 B CN113179695 B CN 113179695B CN 202110578865 A CN202110578865 A CN 202110578865A CN 113179695 B CN113179695 B CN 113179695B
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- 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
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- 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
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Abstract
The invention discloses a method for converting hydrophobic soil into hydrophilic soil under rainfall or irrigation conditions, which comprises the steps of laying a layer of hydrophobic soil with the thickness of 2-3 cm on a land needing water retention and evaporation prevention, arranging a micro vibrator at the junction of the hydrophobic soil and hydrophilic soil, and preventing water from permeating into a cultivated layer due to the hydrophobicity of surface soil after rainfall or surface irrigation. The vibrator vibrates to drive the vibrating arms to vibrate together, the surface layer water repellent soil particles are wrapped by water under the vibration effect, the water repellency of the water repellent soil disappears, water penetrates into a cultivated layer from the surface layer, after rainfall or irrigation is finished, the water content of the surface layer soil is reduced, and after the water wrapping the water repellent soil particles is evaporated, the soil is changed from hydrophilic to water repellent, so that the water after penetration is kept difficult to evaporate. The invention adopts a vibration mode to make the water repellency of the water repellent soil disappear under the rainfall or irrigation condition, and lays the water repellent soil to prevent evaporation. Can realize evaporation prevention during drought and infiltration promotion under rainfall or irrigation conditions.
Description
Technical Field
The invention relates to the technical field of soil improvement, in particular to a method for converting hydrophobic soil into hydrophilic soil under rainfall or irrigation conditions.
Background
The main methods for converting hydrophobic soil into hydrophilic soil at present are chemical modification or addition of hydrophilic materials, such as: adding surfactant, adding hydrophilic clay, etc. However, these modification methods all have long-lasting properties, namely: completely convert soil from hydrophobic to hydrophilic, but in certain special cases we want the hydrophobic soil to be converted only briefly to hydrophilic soil, i.e.: the water repellency-hydrophilicity can be controlled. Other existing methods for covering and retaining water in farmlands, such as: the mulching film and the like are paved, although the evaporation of soil moisture can be effectively prevented, the infiltration of rainfall or irrigation moisture is prevented, and the evaporation prevention and the infiltration promotion cannot be achieved at the same time.
When the surface of the natural soil particles is covered by organic matters or the soil particles contain hydrophobic substances, the soil body is changed from hydrophilic to hydrophobic. Natural water repellent soils are relatively common in nature, such as: woodland subjected to forest fire, soil under pine trees, farmland irrigated by reclaimed water, and the like. Research on water repellent soil is mainly focused on the fields of agriculture and environment, when the soil is changed from hydrophilic to water repellent, rainfall is difficult to permeate into the soil, the roots of crops cannot be supplemented with water, and the emergence rate is reduced or the yield of crops is reduced. If the soil water repellency distribution is not uniform, preferential flow channels may be formed, increasing the risk of groundwater contamination, and thus how to change soil from water repellency to hydrophilic is currently the most important concern. On the other hand, things are two-sided, the characteristic that the water-repellent soil prevents water from infiltrating is inferior in the agricultural field and may become dominant in engineering geology, the water-repellent soil can prevent water in the soil from evaporating, the water retention rate of a water-repellent soil layer with the thickness of 2.5cm can reach more than 90%, and the water-repellent soil layer can be undoubtedly applied to the fields of water and soil conservation and drought control. Under the condition of keeping soil particles dry and water repellent, the water repellent property of the soil particles is changed along with rainfall or some external factors, so that a plurality of slope engineering and agricultural engineering can benefit accordingly. Such as: in the process of plant slope protection or mine restoration, the water repellency of the water repellent soil disappears when rainfall occurs, the water repellent soil particles can be wetted and fully infiltrated, after the rainfall is finished, the water repellency of the water repellent soil particles is restored, the infiltrated water is difficult to evaporate and can be used for supplying plants, and therefore the cost of plant slope protection and mine restoration can be greatly reduced. On this basis, the invention proposes, in this context, a process for converting hydrophobic soils to hydrophilic under rainfall or irrigation conditions.
Disclosure of Invention
In view of the above problems, the present invention provides a method for converting hydrophobic soil into hydrophilic soil under rainfall or irrigation conditions.
According to the purpose of the invention, the invention provides the following technical scheme:
a method for converting a hydrophobic soil to a hydrophilic soil under rainfall or irrigation conditions comprising the steps of:
s1, laying water repellent soil
Laying a layer of water repellent soil on a soil cultivation layer needing water retention and evaporation prevention;
s2, laying micro vibrators
Arranging a micro vibrator at the junction of the hydrophobic soil and the hydrophilic soil, arranging a fixed support rod below the micro vibrator, wherein the micro vibrator is provided with four vibrating arms, and two flexible connecting ropes are arranged at the bottom of the micro vibrator and connect the micro vibrator with the fixed support rod;
s3, working of the micro vibrator
After rainfall or surface irrigation, because of the water repellency of the surface soil, water cannot permeate into a plough layer, a power supply of a micro vibrator is switched on, the micro vibrator vibrates to drive a vibration arm to vibrate together, the surface water repellent soil particles are wrapped by water under the vibration effect, the water repellency of the water repellent soil disappears, and the water permeates into the plough layer from the surface;
s4, water retention and evaporation prevention
After rainfall or irrigation is finished, the water content of surface soil is reduced, and after the water wrapping the water repellent soil particles is evaporated, the soil is changed from hydrophilic to water repellent, so that the water after infiltration is maintained to be difficult to evaporate.
Further, in S1, the thickness of the water repellent soil is 2cm-3cm.
Further, the vibrating arm is a spring with the diameter of 3 mm.
Further, the length of the fixing support is 30-50 cm.
Drawings
FIG. 1 is a graph showing the results of an example of the present invention;
fig. 2 is a top view of a micro-vibrator and vibrating arms in accordance with an embodiment of the present invention.
In the figure, 1-a water repellent soil layer, 2-a hydrophilic soil layer, 3-a connecting rope, 4-a micro vibrator, 5-a vibrating arm and 6-a fixed support rod.
Compared with the prior art, the invention has the beneficial effects that:
1. the method for converting the hydrophobic soil into the hydrophilic soil under the rainfall or irrigation condition can realize the hydrophilicity of the hydrophobic soil under the rainfall or surface layer irrigation condition, and the soil can recover the hydrophobicity after the rainfall or irrigation is finished for a period of time, thereby preventing evaporation during drought and promoting infiltration during rainfall.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1 and 2:
a method for converting hydrophobic soil into hydrophilic soil under rainfall or irrigation conditions comprises the steps of paving a layer of 2-3 cm hydrophobic soil on a hydrophilic soil layer 2 needing water retention and evaporation prevention to form a hydrophobic soil layer 1, arranging a micro vibrator 4 at the junction of the hydrophobic soil and the hydrophilic soil, wherein the micro vibrator 4 is provided with four vibrating arms 5, the vibrating arms 5 are springs with the diameter of about 3mm, and the length is selected according to the field and the plant spacing. Two flexible connecting ropes 3 are arranged at the bottom of the micro vibrator 4, and the connecting ropes 3 connect the micro vibrator 4 with the fixed supporting rod 6, so that the micro vibrator 4 is prevented from being displaced in the vibration process. The fixing struts 6 can be replaced by reinforcing steel bars, and the length of the fixing struts 6 is selected between 30 cm and 50cm according to the texture and density of soil on a plough layer.
When rainfall or surface irrigation occurs, water cannot penetrate into the plough layer due to the water repellency of the surface soil. At the moment, the power supply of the micro vibrator 4 is switched on, the micro vibrator 4 vibrates to drive the vibration arms 5 to vibrate together, the surface layer water repellent soil particles are wrapped by water under the vibration effect, the water repellency of the water repellent soil disappears, water permeates into a plough layer from the surface layer, after rainfall or irrigation is finished, the sun comes out, the water content of the surface layer soil is reduced, after the water wrapping the water repellent soil particles is evaporated, the soil is changed from hydrophilic to water repellent, and therefore the situation that the permeated water is difficult to evaporate is maintained.
The invention adopts a vibration mode to make the water repellency of the water repellent soil disappear under the rainfall or irrigation condition, and lays the water repellent soil to prevent evaporation. Can realize evaporation prevention during drought and infiltration promotion under rainfall or irrigation conditions. The water repellency is recoverable compared to chemically modified water repellent soils, namely: the hydrophilicity-the hydrophobicity can be controlled.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. A method for converting hydrophobic soil to hydrophilic under rainfall or irrigation conditions comprising the steps of:
s1, paving water repellent soil
Laying a layer of water repellent soil on a soil cultivation layer needing water retention and evaporation prevention;
s2, laying a micro vibrator
Arranging a micro vibrator at the junction of the hydrophobic soil and the hydrophilic soil, arranging a fixed support rod below the micro vibrator, wherein the micro vibrator is provided with four vibrating arms, and two flexible connecting ropes are arranged at the bottom of the micro vibrator and connect the micro vibrator with the fixed support rod;
s3, the micro vibrator works
After rainfall or surface irrigation, because of the water repellency of the surface soil, water cannot permeate into a plough layer, a power supply of a micro vibrator is switched on, the micro vibrator vibrates to drive a vibration arm to vibrate together, the surface water repellent soil particles are wrapped by water under the vibration effect, the water repellency of the water repellent soil disappears, and the water permeates into the plough layer from the surface;
s4, water retention and evaporation prevention
After rainfall or irrigation is finished, the water content of surface soil is reduced, and after the water wrapping the water repellent soil particles is evaporated, the soil is changed from hydrophilic to water repellent, so that the water after infiltration is maintained to be difficult to evaporate.
2. The method for converting a water repellent soil into a hydrophilic soil under rainfall or irrigation conditions as claimed in claim 1, wherein the water repellent soil is laid to a thickness of 2cm to 3cm in S1.
3. The method of claim 1, wherein the vibrating arm is a spring with a diameter of 3 mm.
4. The method of converting hydrophobic soil to hydrophilic soil under rainfall or irrigation conditions as set forth in claim 1 wherein said fixed support rods are between 30 and 50cm in length.
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| CN114667818B (en) * | 2022-04-26 | 2023-06-02 | 南昌航空大学 | A method for reversible transformation of soil infiltration-resistance performance |
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| SU1209047A1 (en) * | 1984-03-02 | 1986-02-07 | Ставропольский Ордена "Знак Почета" Научно-Исследовательский Институт Сельского Хозяйства | Method and apparatus for counter-erosion soil tillage |
| JP3140001B2 (en) * | 1999-01-27 | 2001-03-05 | 南榛原開発株式会社 | Soil improvement apparatus and method |
| JP2003155703A (en) * | 2001-11-22 | 2003-05-30 | Kawasaki Steel Corp | Pavement provided with both water permeability/water draining capability and water retentivity and its construction method |
| CN101182709B (en) * | 2007-11-30 | 2011-03-23 | 陈江涛 | Method of composite electroosmosis, vacuum precipitation and vacuum preload reinforcement foundation and device thereof |
| CN102438439B (en) * | 2009-03-23 | 2016-07-13 | 布莱阿姆青年大学 | Seed coating composition and method of applying soil surfactant to water-repellent soil |
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