JP3367294B2 - Hydroponic cultivation method - Google Patents
Hydroponic cultivation methodInfo
- Publication number
- JP3367294B2 JP3367294B2 JP22032095A JP22032095A JP3367294B2 JP 3367294 B2 JP3367294 B2 JP 3367294B2 JP 22032095 A JP22032095 A JP 22032095A JP 22032095 A JP22032095 A JP 22032095A JP 3367294 B2 JP3367294 B2 JP 3367294B2
- Authority
- JP
- Japan
- Prior art keywords
- value
- tank
- drainage
- culture solution
- dilution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000012364 cultivation method Methods 0.000 title claims description 3
- 239000000243 solution Substances 0.000 claims description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 36
- 239000007788 liquid Substances 0.000 claims description 31
- 239000012895 dilution Substances 0.000 claims description 22
- 238000010790 dilution Methods 0.000 claims description 22
- 239000002994 raw material Substances 0.000 claims description 10
- 239000001963 growth medium Substances 0.000 claims description 7
- 235000015097 nutrients Nutrition 0.000 claims description 3
- 239000002609 medium Substances 0.000 description 8
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 8
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 6
- 239000003337 fertilizer Substances 0.000 description 6
- 239000003085 diluting agent Substances 0.000 description 4
- 239000004323 potassium nitrate Substances 0.000 description 4
- 235000010333 potassium nitrate Nutrition 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000007865 diluting Methods 0.000 description 3
- 239000011490 mineral wool Substances 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 description 2
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 2
- 235000019796 monopotassium phosphate Nutrition 0.000 description 2
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 description 2
- 235000020681 well water Nutrition 0.000 description 2
- 239000002349 well water Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 241000220317 Rosa Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 229960002645 boric acid Drugs 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- 229960000355 copper sulfate Drugs 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229940099596 manganese sulfate Drugs 0.000 description 1
- 235000007079 manganese sulphate Nutrition 0.000 description 1
- 239000011702 manganese sulphate Substances 0.000 description 1
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- 235000015393 sodium molybdate Nutrition 0.000 description 1
- 239000011684 sodium molybdate Substances 0.000 description 1
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 229910000368 zinc sulfate Inorganic materials 0.000 description 1
- 229960001763 zinc sulfate Drugs 0.000 description 1
Classifications
-
- Y02P60/216—
Landscapes
- Hydroponics (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】この発明は、ロックウールその他
で出来た培地に培養液を供給して作物を育成させる養液
栽培に用いるものである。
【０００２】
【従来の技術】硝酸カルシウム、硝酸アンモニウム、硝
酸カリウム、リン酸二水素カリウム、硫酸カリウムなど
から選択された少くとも１種の原料に井戸水その他の原
水を加えて培養液を作り、これをロックウールその他で
出来た培地に供給して作物を育成させている。そして、
培地から回収した培養液（以下「排液」という。）は、
供給量の１０％〜１５％に達し、原料に原水を加える際
にこの排液を混入させて原料や原水の節約を図っている
（特開平７−５３２８６）。
【０００３】
【発明が解決しようとする課題】培養液の肥料濃度が導
電率（ＥＣ値）で表され、これを一定範囲内にして培地
に供給されるが、排液は、排出量とＥＣ値が２．０〜１
０．０とばらつき、培養液のＥＣ値を一定の範囲内（例
えば「ばら」では２．０〜２．４）に納めるのが困難で
ある。
【０００４】
【課題を解決するための手段】この発明は、上記の課題
を解決するため、培地から回収した培養液の排液のＥＣ
値を検出し、その排液に検出したＥＣ値に応じた量の原
水を稀釈タンク１５内で加えて一定のＥＣ値を目標にし
た稀釈液を作り、出来上がった稀釈水にそのＥＣ値を検
出しながら原水又は排液を加えてＥＣ値を目標値に納
め、目標のＥＣ値内に納まった稀釈液に給液ユニット２
４内で原料を加えて培養液を作り、この培養液を培地に
供給する養液栽培方法とした。
【０００５】
【作用】この発明は、ロックウールその他で出来た培地
（又はその上のペレット）に作物を移植し、これに培養
液を供給して作物を育成する。この培養液は、若干多目
に供給されるので、その１０％〜１５％が排液として回
収される。回収された排液は、ＥＣ値が計測され、その
ＥＣ値を一定の値（目標値）に下げるように稀釈タンク
１５内で上記の計測値に応じた量の原水（ＥＣ値が０〜
０．１程度）が加えられる。原水が加えられた排液が稀
釈液となり、そのＥＣ値を再度計測し、その値が目標値
となるように小量の原水又は排液を加える。
【０００６】このようにしてＥＣ値が一定の範囲内に達
した稀釈水を給液ユニット２４に送り、この給液ユニッ
ト２４内で原料を加えて肥料濃度が一定（例えばＥＣ値
が２．０〜２．４）の培養液を作り、この培養液を前記
の培地に供給する。
【０００７】
【効果】この発明によると、供給量の１０〜１５％に達
する排液が培養液として再利用されるので、肥料（原
料）や原水が節約されることはもとより、これが流出し
ないので環境汚染がほとんどない。そして、この排液
は、そのＥＣ値に応じて所要の原水が加えられて定めら
れたＥＣ値にあらかじめ調整されているので、これに所
定の原料を加えてＥＣ値が安定した培養液がすみやかに
得られる。
【０００８】
【実施例】この発明の実施例を説明する。図１のよう
に、ハウス１内にロックウールでできた培地２が設けら
れ、その上に複数のペレット３，３，……が並べて置か
れ、それぞれのペレット３，３，……に作物４，４，…
…が植られている。ドリッパ５，５，……がそれぞれの
ペレット３，３，……に差し込まれ、管６で送られて来
た培養液がそれぞれのドリッパ５，５，……でペレット
３，３，……および培地２に送られ、これを吸収して作
物４，４，……が生育している。
【０００９】上記の培養液は、作物４，４，……が吸収
する量に対して余分に送られ、その１０％〜１５％が排
液として回収される。すなわち、培地２の下の受皿７で
受けられた排液は、その肥料濃度を電導率（ＥＣ値）で
計測するＥＣセンサ８および流量計９を経由して排液タ
ンク１０に回収されるようになっている。井戸水その他
の原水が入った原水タンク１１、硝酸カルシウム、硝酸
アンモニウム、キレート鉄（Ｆｅ３３０）の一定の比率
の混合溶液が入ったＡタンク１２、硝酸カリウム、リン
酸二水素カリウム、硝酸カリウム、硝酸マグネシウム、
硫酸マンガン、硫酸亜鉛、ホウ酸、硫酸銅、モリブデン
酸ナトリウムの一定の比率の混合溶液が入ったＢタンク
１３、および、培養液のＰＨ値を調節する溶液が入った
Ａｃｉｄタンク１４が配置されている。
【００１０】稀釈タンク１５が設けられ、バルブ１６，
１７を開くと、排液タンク１０内に回収されている排液
と、原水タンク１１内の原水が供給されるように出来て
いる。この稀釈タンク１５には、水位計１８と、ポンプ
１９でその内の溶液（稀釈水）を循環させながらそのＥ
Ｃ値とＰＨ値を計測するＥＣセンサ２０とＰＨセンサ２
１が設けられている。稀釈液制御部（コンピュータ）２
２が設けられ、排液タンク１０内の排液のＥＣ値を計測
するＥＣセンサ２３、前記の水位計１８およびＥＣセン
サ２０の計測値が入力され、その出力でバルブ１６，１
７をつぎのように開閉するようになっている。
【００１１】排液のＥＣ値は、通常２．０〜１０．０と
広い範囲にばらついているが、ＥＣセンサ２３は、回収
された排液タンク１０内の排液の現実のＥＣ値を計測し
て稀釈液制御部２２に入力する。稀釈液制御部２２は、
バルブ１６を開いてその排液を稀釈タンク１５内に供給
し、水位計１８の計測で所定量になった所でバルブ１６
を閉じる。つづいてバルブ１７を開き、排液に原水を加
えて稀釈水を作るが、この稀釈水の目標のＥＣ値を例え
ば０．５と設定しておくと、水位計１８が計測した排液
の量とそのＥＣセンサ２３が計測したＥＣ値により、加
える原水の量が簡単な計算で定まる。バルブ１７は、そ
の計算された量の原水が稀釈タンク１５に供給される
と、閉じる。
【００１２】そののち、排液と原水が混合されてできた
稀釈液の現実のＥＣ値をＥＣセンサ２０が計測し、これ
が設定した目標値よりも高いとバルブ１７を開いて原水
を加え、低いとバルブ１６を開いて排液を加え、必要に
よってはこれを繰り返して行って稀釈タンク１５内にお
ける稀釈液のＥＣ値を目標値の範囲内に納める。給液ユ
ニット（混合器）２４が設けられ、稀釈タンク１５内の
稀釈液、Ａタンク１２およびＢタンク１３内の溶液（肥
料の原料）並びにＡｃｉｄタンク１４内の溶液が供給さ
れている。それぞれの液は、給液ユニット２４で混合さ
れて培養液となり、ポンプ２５、流量計２６およびバル
ブ２７を経由して管６内に流れ込む。給液制御部（コン
ピュータ）２８が設けられ、ＥＣセンサ８、流量計９お
よび流量計２６の計測値が入力され、バルブ２９，３
０，３１並びにポンプ２５およびバルブ２７に出力する
ようになっている。すなわち、培養液の供給時間が来る
と、バルブ２９，３０を開いてＡタンク１２とＢタンク
１３内の原料を一定の比率で給液ユニット２４に供給
し、ポンプ２５が作動し、バルブ２７が開いて給液ユニ
ット２４内で作られた培養液を培地２に供給する。そし
て、その排液のＥＣ値をＥＣセンサ８が計測している
が、その値が高いと、バルブ２７の開度を上げて培養液
の供給量を上げる。すると、稀釈液の供給量が上って培
養液のＥＣ値が下る。これとは逆に、ＥＣセンサ８が計
測したＥＣ値が低いと、バルブ２７の開度を下げて培養
液の供給量を下げる。すると、稀釈液の供給量が下って
培養液のＥＣ値が上る。
【００１３】なお、給液ユニット２４にＰＨセンサを設
け、その計測値に応じてバルブ３１を開閉し、培養液の
ＰＨ値を例えば５．５に調整する。また、上記は、培養
液のＥＣ値の調節に当り、ＥＣセンサ８が計測した排液
のＥＣ値を用いたが、給液ユニット２４にＥＣセンサを
設け、その計測値でバルブ３０，３１および稀釈タンク
１５と給液ユニット２４の間のバルブを開閉し、その培
養液のＥＣ値を２．０（２〜２．４）に調整することが
できる。
【００１４】図２には、他の実施例を示している。すな
わち、Ｃタンク３２が追加され、その内の溶液がバルブ
３３を経由して給液ユニット２４に供給されるようにな
っている。そして、Ａタンク１２およびＢタンク１３内
の硝酸カルシウムおよび硝酸カリウムの比率を例えば２
分の１に下げ、下げられたこれらの混合溶液をＣタンク
２４内に入れる。ここに、排液には、Ｃａ、Ｎｏ3 およ
びＫを含む成分が多く含まれ、これを繰り返して再利用
すると、植物にその悪影響を及ぼすおそれがある。ここ
に、ＥＣセンサ８および流量計９の計測により、排液の
ＥＣ値が高く、その流量が多いときは、給液制御部２８
の出力でバルブ３３がＣタンク３２からの流路を絞り、
その溶液の流入量を少くする。これとは逆に、排液のＥ
Ｃ値が低く、その流量が少いときは、流路を開き、Ｃタ
ンク３２内の溶液の流量を多くする。なお、その他のと
きは、上記の中間的な流量とする。すると、排液を利用
する場合の肥料の成分をより目標値に近づけることがで
きる。
【００１５】図３は、他の実施例を示している。すなわ
ち、図１のものに加え、原水タンク１１と給液ユニット
２４をバルブ３４を備えた流路で結ぶ。そして、稀釈タ
ンク１５内の稀釈液、原水タンク１１内の原水並びにＡ
タンク１２、Ｂタンク１３およびＡｃｉｄタンク１４内
の溶液を給液ユニット２４に供給し、これらを混合して
培養液を作る。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nutrient solution for cultivating crops by supplying a culture solution to a medium made of rock wool or the like. 2. Description of the Related Art Well water and other raw water are added to at least one raw material selected from calcium nitrate, ammonium nitrate, potassium nitrate, potassium dihydrogen phosphate, potassium sulfate, etc. to form a culture solution, which is then locked. The crop is grown by supplying it to a medium made of wool or other materials. And
The culture solution (hereinafter referred to as “drainage”) collected from the medium is
When the raw water reaches 10% to 15% of the supplied amount, the wastewater is mixed when the raw water is added to the raw material to save the raw material and the raw water (Japanese Patent Application Laid-Open No. 7-53286). [0003] The fertilizer concentration of a culture solution is represented by an electric conductivity (EC value), which is supplied to a culture medium within a certain range. 2.0 to 1
It is difficult to keep the EC value of the culture solution within a certain range (for example, 2.0 to 2.4 for "rose"). [0004] In order to solve the above-mentioned problems, the present invention provides an EC for draining a culture solution recovered from a culture medium.
The dilution value is detected, and the amount of raw water corresponding to the detected EC value is added to the drainage in the dilution tank 15 to make a dilution liquid with a target of a constant EC value, and the EC value is detected in the completed dilution water. While the raw water or drainage is added, the EC value is set to the target value, and the diluted liquid contained within the target EC value is supplied to the liquid supply unit 2.
A nutrient solution cultivation method was used in which a culture solution was prepared by adding the raw materials in 4, and the culture solution was supplied to the medium. According to the present invention, a crop is transplanted to a medium (or a pellet thereon) made of rock wool or the like, and a culture solution is supplied thereto to grow the crop. Since this culture solution is supplied a little more, 10% to 15% of the culture solution is collected as waste liquid. The EC value of the collected drainage is measured, and the amount of raw water (EC value of 0 to 0) according to the measured value is set in the dilution tank 15 so as to reduce the EC value to a constant value (target value).
0.1). The effluent to which the raw water has been added becomes a diluent, the EC value of which is measured again, and a small amount of raw water or effluent is added so that the EC value becomes the target value. [0006] Dilution water having an EC value within a certain range as described above is sent to a liquid supply unit 24, and raw materials are added in the liquid supply unit 24 to maintain a constant fertilizer concentration (for example, an EC value of 2.0). -2.4) A culture solution is prepared, and this culture solution is supplied to the medium. [0007] According to the present invention, since the waste liquid that reaches 10 to 15% of the supply amount is reused as a culture solution, fertilizer (raw material) and raw water are saved, and this does not flow out. Almost no environmental pollution. The wastewater is adjusted in advance to a predetermined EC value by adding necessary raw water in accordance with the EC value, so that a culture medium having a stable EC value by adding a predetermined raw material to the wastewater can be quickly prepared. Is obtained. An embodiment of the present invention will be described. As shown in FIG. 1, a medium 1 made of rock wool is provided in a house 1 and a plurality of pellets 3, 3,... , 4, ...
… Is planted. The drippers 5, 5,... Are inserted into the respective pellets 3, 3,..., And the culture solution sent by the tube 6 is pelletized by the respective drippers 5, 5,. It is sent to the culture medium 2 and the crops 4, 4,... Grow by absorbing this. The above culture solution is sent in excess of the amount absorbed by the crops 4, 4,..., And 10% to 15% of the culture solution is collected as waste liquid. That is, the drainage received in the saucer 7 below the culture medium 2 is collected in the drainage tank 10 via the EC sensor 8 and the flow meter 9 which measure the fertilizer concentration by the electric conductivity (EC value). It has become. Raw water tank 11 containing well water and other raw water, A tank 12 containing a mixed solution of calcium nitrate, ammonium nitrate, and a certain ratio of chelated iron (Fe330), potassium nitrate, potassium dihydrogen phosphate, potassium nitrate, magnesium nitrate,
A B tank 13 containing a mixed solution of manganese sulfate, zinc sulfate, boric acid, copper sulfate and sodium molybdate at a fixed ratio, and an Acid tank 14 containing a solution for adjusting the pH value of the culture solution are arranged. I have. A dilution tank 15 is provided.
Opening 17 allows drainage collected in drainage tank 10 and raw water in raw water tank 11 to be supplied. In the dilution tank 15, a water level gauge 18 and a pump 19 are used to circulate the solution (diluted water) in the dilution tank 15.
EC sensor 20 and PH sensor 2 for measuring C value and PH value
1 is provided. Dilution liquid control unit (computer) 2
The EC sensor 23 for measuring the EC value of the drainage in the drainage tank 10, the measured values of the water level gauge 18 and the EC sensor 20 are input, and the outputs thereof are used as valves 16, 1.
7 is opened and closed as follows. Although the EC value of the drainage generally varies in a wide range of 2.0 to 10.0, the EC sensor 23 measures the actual EC value of the drainage collected in the drainage tank 10. And input it to the diluting liquid control unit 22. The dilution liquid control unit 22
The valve 16 is opened and the drainage liquid is supplied into the dilution tank 15.
Close. Subsequently, the valve 17 is opened, and the diluted water is made by adding the raw water to the discharged water. If the target EC value of the diluted water is set to, for example, 0.5, the amount of the discharged liquid measured by the water level meter 18 is measured. And the EC value measured by the EC sensor 23, the amount of raw water to be added is determined by a simple calculation. The valve 17 closes when the calculated amount of raw water is supplied to the dilution tank 15. After that, the EC sensor 20 measures the actual EC value of the diluted solution formed by mixing the drainage and the raw water. If the actual EC value is higher than the set target value, the valve 17 is opened to add the raw water and the raw water is added. And the valve 16 are opened to add drainage, and this is repeated if necessary, so that the EC value of the diluent in the dilution tank 15 falls within a target value range. A liquid supply unit (mixer) 24 is provided to supply a diluent in the diluting tank 15, a solution in the A tank 12 and the B tank 13 (raw material of fertilizer), and a solution in the Acid tank 14. The respective liquids are mixed in the liquid supply unit 24 to become a culture liquid, and flow into the pipe 6 via the pump 25, the flow meter 26, and the valve 27. A liquid supply control unit (computer) 28 is provided, and the measured values of the EC sensor 8, the flow meter 9, and the flow meter 26 are input, and the valves 29, 3
0, 31 and the pump 25 and the valve 27. That is, when the supply time of the culture solution comes, the valves 29 and 30 are opened to supply the raw materials in the A tank 12 and the B tank 13 to the liquid supply unit 24 at a fixed ratio, the pump 25 is operated, and the valve 27 is operated. Open and supply the culture solution produced in the liquid supply unit 24 to the culture medium 2. The EC value of the drainage is measured by the EC sensor 8. If the EC value is high, the opening degree of the valve 27 is increased to increase the supply amount of the culture solution. Then, the supply amount of the diluent increases, and the EC value of the culture decreases. Conversely, when the EC value measured by the EC sensor 8 is low, the opening degree of the valve 27 is reduced to reduce the supply amount of the culture solution. Then, the supply amount of the diluting solution decreases, and the EC value of the culture solution increases. A pH sensor is provided in the supply unit 24, and the valve 31 is opened and closed according to the measured value to adjust the pH value of the culture solution to, for example, 5.5. In the above, the EC value of the drainage measured by the EC sensor 8 was used to adjust the EC value of the culture solution. However, an EC sensor was provided in the liquid supply unit 24, and the valves 30, 31 and By opening and closing a valve between the dilution tank 15 and the liquid supply unit 24, the EC value of the culture solution can be adjusted to 2.0 (2 to 2.4). FIG. 2 shows another embodiment. That is, a C tank 32 is added, and the solution therein is supplied to the liquid supply unit 24 via the valve 33. Then, the ratio of calcium nitrate and potassium nitrate in the A tank 12 and the B tank 13 is set to, for example, 2
The mixed solution is lowered into the C tank 24. Here, the drainage contains a large amount of components containing Ca, No3 and K, and if this is repeatedly reused, the plant may be adversely affected. Here, when the EC value of the drainage is high and the flow rate is high by the measurement of the EC sensor 8 and the flow meter 9, the liquid supply control unit 28
The valve 33 restricts the flow path from the C tank 32 with the output of
Reduce the inflow of the solution. Conversely, the drainage E
When the C value is low and the flow rate is low, the flow path is opened and the flow rate of the solution in the C tank 32 is increased. In other cases, the flow rate is intermediate as described above. Then, the component of the fertilizer in the case of using drainage can be made closer to the target value. FIG. 3 shows another embodiment. That is, in addition to the one in FIG. 1, the raw water tank 11 and the liquid supply unit 24 are connected by a flow path provided with a valve 34. Then, the dilution liquid in the dilution tank 15, the raw water in the raw water tank 11, and A
The solutions in the tank 12, the B tank 13, and the Acid tank 14 are supplied to a liquid supply unit 24, and these are mixed to prepare a culture solution.
【図面の簡単な説明】 【図１】この発明の実施例のブロック図 【図２】他の実施例のブロック図 【図３】他の実施例のブロック図 【符号の説明】 ２ 培地 １５ 稀釈タンク ２４ 給液ユニット[Brief description of the drawings] FIG. 1 is a block diagram of an embodiment of the present invention. FIG. 2 is a block diagram of another embodiment. FIG. 3 is a block diagram of another embodiment. [Explanation of symbols] 2 Medium 15 Dilution tank 24 Liquid supply unit
Claims (1)
値を検出し、その排液に検出したＥＣ値に応じた量の原
水を稀釈タンク１５内で加えて一定のＥＣ値を目標にし
た稀釈液を作り、出来上がった稀釈水にそのＥＣ値を検
出しながら原水又は排液を加えてＥＣ値を目標値に納
め、目標のＥＣ値内に納まった稀釈液に給液ユニット２
４内で原料を加えて培養液を作り、この培養液を培地２
に供給する養液栽培方法。(57) [Claims] [Claim 1] EC of the drainage of the culture solution recovered from the culture medium 2
The dilution value is detected, and the amount of raw water corresponding to the detected EC value is added to the drainage in the dilution tank 15 to make a dilution liquid with a target of a constant EC value, and the EC value is detected in the completed dilution water. While the raw water or drainage is added, the EC value is set to the target value, and the diluted liquid contained within the target EC value is supplied to the liquid supply unit 2.
4 to prepare a culture solution by adding the raw materials.
Nutrient cultivation method to supply to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22032095A JP3367294B2 (en) | 1995-08-29 | 1995-08-29 | Hydroponic cultivation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22032095A JP3367294B2 (en) | 1995-08-29 | 1995-08-29 | Hydroponic cultivation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0965783A JPH0965783A (en) | 1997-03-11 |
| JP3367294B2 true JP3367294B2 (en) | 2003-01-14 |
Family
ID=16749301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22032095A Expired - Lifetime JP3367294B2 (en) | 1995-08-29 | 1995-08-29 | Hydroponic cultivation method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3367294B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017033057A1 (en) * | 2015-08-25 | 2017-03-02 | Netafim Ltd. | Method and apparatus for fertigation with wastewater |
| US10143130B2 (en) | 2015-08-25 | 2018-12-04 | Netafim Ltd. | Method and apparatus for fertigation with wastewater |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11299375A (en) * | 1998-04-22 | 1999-11-02 | Kaneko Agricult Mach Co Ltd | Watering system in plant culture facility |
| JP2000342090A (en) * | 1999-06-02 | 2000-12-12 | Hideki Kobayashi | Method and apparatus for feeding nutritious liquid |
| JP2001017011A (en) * | 1999-07-05 | 2001-01-23 | Taiyo Kogyo Co Ltd | Method for feeding nutritious liquid for circulating type nutriculture |
| JP4759820B2 (en) * | 2001-03-06 | 2011-08-31 | 井関農機株式会社 | Hydroponics equipment |
| JP4636964B2 (en) * | 2005-08-04 | 2011-02-23 | 隆盛 大出 | Water supply management method, water supply management computer program, and water supply management device in plant cultivation apparatus |
| JP6853497B2 (en) * | 2016-10-24 | 2021-03-31 | 井関農機株式会社 | Hydroponic cultivation system |
| CN106843307A (en) * | 2017-02-22 | 2017-06-13 | 佛山市高明区菜花园农业科技有限公司 | The control system and control method of a kind of hydroponic device |
-
1995
- 1995-08-29 JP JP22032095A patent/JP3367294B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017033057A1 (en) * | 2015-08-25 | 2017-03-02 | Netafim Ltd. | Method and apparatus for fertigation with wastewater |
| US10143130B2 (en) | 2015-08-25 | 2018-12-04 | Netafim Ltd. | Method and apparatus for fertigation with wastewater |
| US10182524B2 (en) | 2015-08-25 | 2019-01-22 | Netafim Ltd. | Method and apparatus for fertigation with wastewater |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0965783A (en) | 1997-03-11 |
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