JPH06253695A - Method for controlling nutritive solution - Google Patents
Method for controlling nutritive solutionInfo
- Publication number
- JPH06253695A JPH06253695A JP5045008A JP4500893A JPH06253695A JP H06253695 A JPH06253695 A JP H06253695A JP 5045008 A JP5045008 A JP 5045008A JP 4500893 A JP4500893 A JP 4500893A JP H06253695 A JPH06253695 A JP H06253695A
- Authority
- JP
- Japan
- Prior art keywords
- nutrient solution
- ion
- measured
- amount
- components
- 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.)
- Granted
Links
Classifications
-
- Y02P60/216—
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、植物の根に、少なくと
もＫ，Ｎ，Ｃａ，Ｍｇ，Ｐの成分が含まれている養液を
与えて該植物を栽培する養液栽培装置等に使用される養
液の制御方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in a hydroponic cultivation apparatus or the like for cultivating a plant by giving a nutrient solution containing at least K, N, Ca, Mg and P components to the root of the plant. The present invention relates to a method for controlling a nutrient solution.
【０００２】[0002]
【従来の技術】近年、バイオ技術の中の一つ、との位置
付けで、養液栽培技術が脚光を浴びてきている。これ
は、野菜や果物などをほぼ一定の品質で多量に生産でき
る可能性があるからである。2. Description of the Related Art In recent years, hydroponics has been in the spotlight as one of biotechnology. This is because there is a possibility that a large amount of vegetables and fruits can be produced with almost constant quality.
【０００３】植物は、ＣＯ2 、Ｋ，Ｎ，Ｃａ，Ｐ，Ｍｇ
を栄養素としており、ＣＯ2 以外のものは、根から吸収
している。ここで、植物の根からの吸収を考えると、栽
培する側は、養液中に植物が必要とする栄養を過不足な
く毎日与えてやらなければならない。養液栽培で失敗す
る原因の一つとして、養液の濃度管理の難しさが考えら
れる。The plants are CO 2 , K, N, Ca, P and Mg.
Is used as a nutrient, and substances other than CO 2 are absorbed from the roots. Here, considering the absorption from the roots of the plants, the cultivating side must provide the nutrients required by the plants in the nutrient solution every day, in proper amounts. One of the causes of failure in hydroponics is the difficulty in controlling the concentration of the nutrient solution.
【０００４】従来、養液の濃度管理は、導電率を測定す
ることで行われている。導電率は、水溶液の電流の流れ
易さを示すものである。水溶液に電流が流れるのは、水
溶液中に存在しているイオンが電子を運ぶからである。
従って、水溶液に溶け込んでいるイオンの量が多いほ
ど、電流が流れ易くなる。そこで、養液の導電率を測定
することにより、その養液に存在するイオンの量を知る
ことができる。しかし、ここで得られるイオン濃度は、
養液中にあるイオンの総量であり、数種類のイオンが溶
けている場合には、各イオンの濃度を個別に測定できな
い。Conventionally, the control of the concentration of the nutrient solution is performed by measuring the electric conductivity. The conductivity indicates the ease with which a current flows in an aqueous solution. The electric current flows in the aqueous solution because the ions existing in the aqueous solution carry electrons.
Therefore, the greater the amount of ions dissolved in the aqueous solution, the easier the current flows. Therefore, by measuring the conductivity of the nutrient solution, the amount of ions present in the nutrient solution can be known. However, the ion concentration obtained here is
It is the total amount of ions in the nutrient solution, and when several types of ions are dissolved, the concentration of each ion cannot be measured individually.
【０００５】この様なことから、本出願人は先に、養液
栽培における養液中の各種成分の管理を行うため、実際
に養液中のＫ+ ，ＮＯ3 - ，Ｃａ2+ などのイオン濃度
を測定できるイオンメータを開発した。これは、養液中
の栄養成分のうち、Ｋ，Ｃａ，Ｎを同時に測定できる。
ＫはＫイオン（Ｋ+ ）、ＣａはＣａイオン（Ｃａ2+）と
して測定する。Ｎについては、ＮＨ 4 +を測定する。From the above, the applicant of the present invention first manages K + in the nutrient solution in order to manage various components in the nutrient solution in the hydroponic culture. , NO 3 - , An ion meter that can measure the concentration of ions such as Ca 2+ has been developed. This can simultaneously measure K, Ca, N among the nutrient components in the nutrient solution.
K is K ion (K + ) And Ca are measured as Ca ions (Ca 2+ ). For N, NH 4 + is measured.
【０００６】このイオンメータの検出部は、イオン選択
性電極を有し、これは乾電池の電位発生と同じ原理であ
る。例えば、容器の中央を隔膜で仕切り、隔膜の両側に
イオン濃度の異なる溶液を入れると、そのイオン濃度差
に対応した電位が隔膜の両側に発生する。このようなこ
とから、一方のイオン濃度を決めておくと、その発生電
位から、他方の溶液のイオン濃度を知ることができる。The detection section of this ion meter has an ion selective electrode, which has the same principle as the potential generation of a dry battery. For example, when the center of the container is partitioned by a diaphragm and solutions having different ion concentrations are put on both sides of the diaphragm, an electric potential corresponding to the difference in the ion concentration is generated on both sides of the diaphragm. From this, if one ion concentration is determined, the ion concentration of the other solution can be known from the generated potential.
【０００７】[0007]
【発明が解決しようとする課題】以上のようなイオンメ
ータを用いても、Ｋ+ ，ＮＯ3 - ，Ｃａ2+の３成分しか
測定できない。実際に、養液中に含まれている成分は、
図６に示すようにＫ，Ｎ，Ｃａ，Ｐ，Ｍｇからなる主要
成分と、Ｆｅ，Ｂ，Ｍｎ，Ｚｎ，Ｃｕ，Ｍｏからなる微
量成分からなり、このうちの主要成分Ｋ，Ｎ，Ｃａ，
Ｐ，ＭｇのイオンＫ+ ，ＮＯ3 - ，Ｃａ2+，ＰＯ4 3-が
バランスするように適正な値に保つことは、作物を育て
る上で重要なファクターである。Even if the above-mentioned ion meter is used, K + , NO 3 - , Ca 2+ can only be measured. In fact, the ingredients contained in the nutrient solution are
As shown in FIG. 6, it is composed of major components consisting of K, N, Ca, P and Mg and minor components consisting of Fe, B, Mn, Zn, Cu and Mo. Of these, major components K, N, Ca,
Ions of P and Mg K + , NO 3 - , Ca 2+ , PO 4 3− are kept at proper values so as to be balanced, which is an important factor in growing crops.
【０００８】そこで本発明は、養液中に含まれている
Ｋ，Ｎ，Ｃａ，Ｐ，Ｍｇからなる主要成分のうちのＫ，
Ｎ，Ｃａしかイオン濃度が測定できなくても、Ｐ，Ｍｇ
のイオン濃度が測定できた場合と同様な養液濃度管理が
可能となる養液の制御方法を提供することを目的とす
る。Therefore, the present invention provides K, N, Ca, P, Mg among the main components contained in the nutrient solution,
Even if the ion concentration can be measured only for N and Ca, P and Mg
It is an object of the present invention to provide a method for controlling a nutrient solution, which enables the same nutrient concentration management as when the ion concentration of can be measured.
【０００９】[0009]
【課題を解決するための手段】前記目的を達成するた
め、請求項１に対応する発明は、植物の根に、少なくと
もＫ，Ｎ，Ｃａ，Ｍｇ，Ｐの成分が含まれている養液を
与えて該植物を栽培する場合、前記養液内の成分のう
ち、Ｃａのイオン吸収量を測定し、この測定したイオン
吸収量に応じた予め定められた所定の割合又は所定の比
率で前記Ｍｇの成分を補給する養液の制御方法である。In order to achieve the above object, the invention corresponding to claim 1 provides a nutrient solution in which roots of a plant contain at least K, N, Ca, Mg and P components. When cultivating the plant by giving, of the components in the nutrient solution, the ion absorption amount of Ca is measured, and the Mg is mixed at a predetermined ratio or a predetermined ratio according to the measured ion absorption amount. It is a method of controlling the nutrient solution for replenishing the components of.
【００１０】また、前記目的を達成するため、請求項２
に対応する発明は、植物の根に、少なくともＫ，Ｎ，Ｃ
ａ，Ｍｇ，Ｐの成分が含まれている養液を与えて該植物
を栽培する場合、前記養液内の成分のうち、Ｎのイオン
吸収量を測定し、この測定したイオン吸収量に応じた予
め定められた所定の割合又は所定の比率でＰの成分を補
給する養液の制御方法である。Further, in order to achieve the above-mentioned object, claim 2
The invention corresponding to the invention relates to plant roots containing at least K, N, C
When the plant is cultivated by feeding a nutrient solution containing a, Mg, and P components, the N ion absorption amount of the components in the nutrient solution is measured, and the N absorption amount is measured according to the measured ion absorption amount. In addition, it is a method of controlling the nutrient solution in which the P component is replenished at a predetermined ratio or a predetermined ratio.
【００１１】さらに、前記目的を達成するため、請求項
３に対応する発明は、植物の根に、少なくともＫ，Ｎ，
Ｃａ，Ｍｇ，Ｐの成分が含まれている養液を与えて該植
物を栽培する場合、前記養液内の成分のうち、Ｎのイオ
ン吸収量を測定し、この測定したイオン吸収量に応じた
予め定められた所定の割合又は所定の比率でＰの成分を
補給するとともに、このＰの成分の補給量の割合または
比率を初期の段階ではＮのイオン吸収量に比較して高め
るようにした養液の制御方法である。Further, in order to achieve the above object, the invention according to claim 3 provides at least K, N,
When the plant is cultivated by feeding a nutrient solution containing components of Ca, Mg and P, the amount of absorbed ions of N among the components in the nutrient solution is measured, and according to the measured amount of absorbed ions, The P component is replenished at a predetermined ratio or a predetermined ratio, and the ratio or ratio of the replenishment amount of the P component is increased in the initial stage as compared with the ion absorption amount of N. It is a method of controlling the nutrient solution.
【００１２】[0012]
【作用】請求項１に対応する発明によれば、Ｃａのイオ
ン吸収量を測定し、この測定したイオン吸収量に応じて
Ｍｇの成分を補給することにより、Ｍｇのイオン濃度が
測定できた場合と同様な養液濃度管理が可能となる。According to the invention corresponding to claim 1, when the ion concentration of Mg can be measured by measuring the ion absorption amount of Ca and replenishing the Mg component in accordance with the measured ion absorption amount It is possible to manage the nutrient solution concentration in the same manner as.
【００１３】請求項２に対応する発明によれば、Ｎのイ
オン吸収量を測定し、この測定したイオン吸収量に応じ
た予め定められた所定の割合又は所定の比率でＰの成分
を補給することにより、Ｐのイオン濃度が測定できた場
合と同様な養液濃度管理が可能となる。According to the second aspect of the invention, the ion absorption amount of N is measured, and the P component is replenished at a predetermined ratio or a predetermined ratio according to the measured ion absorption amount. As a result, it becomes possible to manage the nutrient solution concentration in the same manner as when the P ion concentration can be measured.
【００１４】請求項３に対応する発明によれば、Ｎのイ
オン吸収量を測定し、この測定したイオン吸収量に応じ
てＰの成分を補給するとともに、このＰの成分の補給量
の割合または比率を初期の段階ではＮのイオン吸収量に
比較して高めるようにすることにより、ＰおよびＭｇの
イオン濃度が測定できた場合と同様な養液濃度管理が可
能となる。According to the invention corresponding to claim 3, the ion absorption amount of N is measured, and the P component is replenished according to the measured ion absorption amount, and the ratio of the replenishment amount of the P component or By increasing the ratio in comparison with the amount of absorbed ions of N in the initial stage, it becomes possible to manage the nutrient solution concentration in the same manner as when the ion concentrations of P and Mg can be measured.
【００１５】[0015]
【実施例】以下、本発明の実施例について図面を参照し
て説明する。図１は本発明方法を実施するための装置の
概略構成を示すブロック図である。ハウス１内に養液栽
培植物ベッド２、植物の成育に必要なＫ，ＮＯ3 ーＮ，
Ｃａ，Ｐ，Ｍｇを水に溶かし込んだ養液３を貯溜する養
液タンク４が収納され、養液タンク４からの養液３をポ
ンプ５により配管６を通じて植物ベッド２に供給され、
ここで栽培植物７に養分が供給なされ、余分の養液３は
養液タンク４に還流されるようになっており、これによ
り植物ベッド２に多数植え込まれている植物７を育てる
ことができようになっている。なお、養液タンク４に
は、養液３の成分を管理を行うためのＰＨ計、導電率
計、液温計等が設置されている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of an apparatus for carrying out the method of the present invention. Hydroponic plant bed 2 in house 1, K, NO 3 -N, which are necessary for plant growth,
A nutrient solution tank 4 that stores a nutrient solution 3 in which Ca, P, and Mg are dissolved is stored, and the nutrient solution 3 from the nutrient solution tank 4 is supplied to the plant bed 2 through a pipe 6 by a pump 5.
Here, the nutrients are supplied to the cultivated plants 7, and the excess nutrient solution 3 is returned to the nutrient solution tank 4, whereby the plants 7 that are planted in large numbers in the plant bed 2 can be grown. It is like this. The nutrient solution tank 4 is provided with a PH meter, a conductivity meter, a liquid thermometer, etc. for managing the components of the nutrient solution 3.
【００１６】ハウス１の外部には、養液タンク４内にそ
れぞれ供給する、植物７の成育に必要な栄養成分を溶け
込ませた濃厚な原液充填された原液タンク８，９，１
０，１１が、それぞれ流量調節弁１２，１３，１４，１
５を通して所定の分量だけ供給できるようになってお
り、原液タンク８にはＫ+ ，ＮＯ3 - が、原液タンク９
にはＣａ+ ，ＮＯ3 - が、原液タンク１０にはＰが、原
液タンク１１にはＭｇが充填されている。Outside the house 1, the stock solution tanks 8, 9, 1 filled with a concentrated stock solution containing the nutrients necessary for the growth of the plants 7 are respectively supplied into the solution tank 4.
0 and 11 are flow control valves 12, 13, 14, and 1, respectively.
It is possible to supply a predetermined amount through 5 and K + in the stock solution tank 8. , NO 3 - But undiluted solution tank 9
Is Ca + , NO 3 - However, the stock solution tank 10 is filled with P, and the stock solution tank 11 is filled with Mg.
【００１７】養液タンク４に貯溜される養液３は、植物
７の種類により、またその成長段階、日照、気温、湿
度、時間待等により異なる各種栄養成分組成に調整され
るべきであり、後述する制御により成分組成調整が行わ
れる。The nutrient solution 3 stored in the nutrient solution tank 4 should be adjusted to various nutrient composition depending on the type of the plant 7 and its growth stage, sunshine, temperature, humidity, and waiting time. The component composition is adjusted by the control described below.
【００１８】イオンメータシステム１６は、イオンメー
タ、校正液タンク、サンプリングタンク、排液タンク、
表示器、プリンタを備え、カリウムイオンＫ+ 、カルシ
ウムイオンＣａ+ 、硝酸イオンＮＯ3 - の３成分のイオ
ン濃度を同時に測定でき、この測定値を表示器に表示す
ると共に、プリンタにプリントアウトできる構成となっ
ている。養液３の成分測定を行う場合には、養液タンク
４と前記サンプリングタンクが接続された配管の途中に
設けたサンプリングポンプ１７を動作させることによ
り、一定の周期で間欠的に継続して行い、ある成分のイ
オン濃度が所定値より低下したときには、そのイオン成
分を補給するために、原液タンク８〜１１から原液を養
液タンク４に補給し、成分不足を来さないようにするも
のである。The ion meter system 16 includes an ion meter, a calibration liquid tank, a sampling tank, a drainage tank,
Equipped with a display and printer, potassium ion K + , Calcium ion Ca + , Nitrate ions NO 3 - The ion concentrations of the three components can be measured simultaneously, and the measured values can be displayed on the display and printed out on the printer. When the components of the nutrient solution 3 are measured, the sampling pump 17 provided in the middle of the pipe connecting the nutrient solution tank 4 and the sampling tank is operated to intermittently and continuously perform the measurement at a constant cycle. When the ionic concentration of a certain component is lower than a predetermined value, the stock solution is replenished from the stock solution tanks 8 to 11 to the nutrient solution tank 4 in order to replenish the ionic component so as to prevent a shortage of the components. is there.
【００１９】コントローラ１８は、例えばイオンメータ
システム１６に対してイオン濃度測定指令を与え、養液
成分のイオン濃度測定を例えば１時間毎に周期的に、し
かも各周期毎に複数回繰り返し測定させる測定制御器
と、イオンメータシステム１６からの各測定毎のイオン
測定値を格納する測定値メモリと、各周期毎の複数回の
測定値について一致をとり、ほぼ一致する測定値が得ら
れたときにその測定値をイオン濃度測定値とする比較器
と、比較器が求めたイオン濃度測定値に基づき、植物７
の必要とする養液成分組成と比較して各種成分の過不足
を判断し、不足している成分を前記イオン濃度測定値か
ら求めてその補給指令を出力する濃度制御器からなって
いる。コントローラ１８は、イオンメータシステム１６
と接続され、これに対するイオン濃度測定制御、イオン
濃度測定値のデータ収集、成分調整装置として流量調節
弁１２〜１５を後述するように開閉制御を行うものであ
る。The controller 18 gives, for example, an ion concentration measurement command to the ion meter system 16 to measure the ion concentration of the nutrient solution periodically, for example, every hour, and repeatedly for a plurality of times in each period. When the controller, the measurement value memory that stores the ion measurement value for each measurement from the ion meter system 16, and the measurement values for a plurality of times for each cycle are matched, and when substantially matched measurement values are obtained. Based on the ion concentration measurement value obtained by the comparator and the comparator that uses the measurement value as the ion concentration measurement value, the plant 7
The concentration controller is configured to judge the excess or deficiency of various components by comparing with the required nutrient solution composition, obtain the deficient components from the ion concentration measurement value, and output the replenishment command. The controller 18 uses the ion meter system 16
The flow rate control valves 12 to 15 as the component adjusting device are controlled to be opened and closed as will be described later.
【００２０】イオン吸収量演算器１９は、イオンメータ
システム１６で測定されたカリウムイオンＫ+ 、カルシ
ウムイオンＣａ+ 、硝酸イオンＮＯ3 - の例えば３０分
毎に得られるイオン濃度と、図示しない液量計によって
イオン濃度の測定時に測定された液量を掛け合わせてイ
オン重量を算出し、次いで時間的に連続したそれらの差
分を算出して３０分間のイオン吸収量（イオン消費量）
を求めるものである。図２と図４はこのようにして求め
たイオン吸収量を示す特性図であり、図２はＣａの栽培
日数とイオン吸収量の関係を示すもので、図３はＮＯ3
- の栽培日数とイオン吸収量の関係を示すものであり、
いずれも養液温度が８°Ｃ、１３°Ｃ、１８°Ｃ、２３
°Ｃの場合についてそれぞれ求めたものである。そし
て、イオン吸収量演算器１９は、以下のような機能も有
している。すなわち、図２および図４のイオン吸収量に
対して所定の百分率例えば２５％〜４０％を掛け算して
予想イオン吸収量を求める。図３および図５はこのよう
にして求めた値を基にＭｇおよびＰの予想の栽培日数ー
イオン吸収量の特性図である。The ion absorption amount calculator 19 is a potassium ion K + measured by the ion meter system 16. , Calcium ion Ca + , Nitrate ions NO 3 - For example, an ion weight is calculated by multiplying the ion concentration obtained every 30 minutes by the liquid amount measured at the time of measuring the ion concentration by a liquid meter (not shown), and then calculating the time-continuous difference between them. Ion absorption amount for 30 minutes (ion consumption amount)
Is to seek. 2 and 4 are characteristic diagrams showing the ion absorption amount thus obtained, FIG. 2 shows the relationship between the cultivation days of Ca and the ion absorption amount, and FIG. 3 shows NO 3
- It shows the relationship between the number of days of cultivation and the amount of absorbed ions,
In all cases, the nutrient solution temperature is 8 ° C, 13 ° C, 18 ° C, 23
These are obtained for each case of ° C. The ion absorption amount calculator 19 also has the following functions. That is, the expected ion absorption amount is obtained by multiplying the ion absorption amounts in FIGS. 2 and 4 by a predetermined percentage, for example, 25% to 40%. FIG. 3 and FIG. 5 are characteristic diagrams of predicted cultivation days and ion absorption amount of Mg and P based on the values thus obtained.
【００２１】そして、イオン吸収量演算器１９で求めた
Ｋ，Ｃａ、ＮＯ3 およびＰ、Ｍｇのイオン吸収量だけ原
液タンク８〜１１からＫ，Ｃａ、ＮＯ3 およびＰ、Ｍｇ
が供給されるようにコントローラ１８により流量調節弁
１２〜１５が制御される。[0021] Then, K was determined by ion absorption amount calculator 19, Ca, NO 3 and P, K ion absorption only stock solution tank 8-11 Mg, Ca, NO 3 and P, Mg
The flow rate control valves 12 to 15 are controlled by the controller 18 so as to be supplied.
【００２２】以下、このように構成された本実施例装置
の動作について説明する。イオンメータシステム１６
は、コントローラ１８の測定制御部から一定周期で、例
えば１時間ごとに測定指令が与えられ、イオンメータシ
ステム１６は、該測定指令に基づいて養液３の各種イオ
ンの濃度測定を行う時に一度に複数回繰り返し行い、そ
の測定値が測定値メモリに格納される。The operation of the apparatus of this embodiment thus constructed will be described below. Ion meter system 16
Is given a measurement command from the measurement control unit of the controller 18 at regular intervals, for example, every hour, and the ion meter system 16 measures the concentration of various ions of the nutrient solution 3 based on the measurement command at one time. The measurement is repeated a plurality of times, and the measured value is stored in the measured value memory.
【００２３】比較器では、各測定周期毎の複数回のイオ
ン濃度測定値について一致をとり、ほぼ一定の測定値と
なれば、その測定値を正しい測定値として濃度制御部に
与える。濃度制御部では、得られた正しいイオン濃度測
定値を基にして現在栽培している植物７の成長段階に応
じて、現在必要とする養液３の成分組成とイオン濃度測
定結果とを比較し、不足している成分が無いかどうかを
判断し、不足しているものがあれば、その不足の度合い
に応じて不足している成分を補給できるように流量調整
弁１２〜１５のいずれか対応する方の弁を一定時間開
き、必要量の原液が養液タンク４に補給されるようにす
る。In the comparator, the ion concentration measurement values obtained a plurality of times in each measurement cycle are matched with each other, and when the measurement values become substantially constant, the measurement values are given to the concentration control section as correct measurement values. The concentration control unit compares the component composition of the nutrient solution 3 required at present with the ion concentration measurement result according to the growth stage of the plant 7 currently cultivated based on the obtained correct ion concentration measurement value. , It is judged whether or not there is a deficient component, and if there is a deficient component, one of the flow rate adjustment valves 12-15 is provided so that the deficient component can be replenished according to the degree of the deficiency. The valve for one is opened for a certain period of time so that the required amount of stock solution is replenished in the nutrient solution tank 4.
【００２４】この様にして、イオンメータシステム１６
に対して定められた一定周期毎に数回繰り返しイオン濃
度測定を行い、一致のとれる測定値を見出だし、それを
該当周期の正しい測定値として採用し、これに基づいて
養液３の成分調整が行われる。In this way, the ion meter system 16
Repeatedly measure the ion concentration several times for each fixed cycle, find a consistent measurement value, adopt it as the correct measurement value for the corresponding cycle, and adjust the composition of nutrient solution 3 based on this. Is done.
【００２５】ここで、Ｎのイオン吸収量とＰの補給量の
制御について、図７を参照して説明する。図７は、図４
のＮＯ3 およびＰが２３°Ｃのときの栽培日数とイオン
吸収量の関係のみを実験した結果を示す図である。図中
の（ ）内の数値は、Ｐの吸収量に対するＮＯ3 の吸収
量の割合（Ｐの吸収量÷ＮＯ3 の吸収量）を示してい
る。この図から明らかなように、栽培開始後３日目まで
はＮＯ3 - の吸収量に比べてＰの吸収量の割合が多く、
それ以降は少ないことから、栽培開始後３日目まではＮ
Ｏ3 - の吸収量の３５％をＰの吸収量と設定し、栽培開
始後４日目以降はＮＯ3 - の吸収量の３５％をＰの吸収
量と設定して制御すればよい。The control of the amount of absorbed ions of N and the amount of supplemented P will be described with reference to FIG. FIG. 7 shows FIG.
It is a figure which shows the result of having experimented only the relationship between the number of days of cultivation and the amount of absorbed ions when NO 3 and P were 23 ° C. The numerical value in the parentheses in the figure indicates the ratio of the absorption amount of NO 3 to the absorption amount of P (absorption amount of P ÷ absorption amount of NO 3 ). As apparent from the figure, the third day after the start of cultivation NO 3 - The ratio of P absorption is higher than that of
Since the number is small after that, N until the third day after the start of cultivation
O 3 - Is of the 35% of the absorption amount is set to absorb the amount of P, 4 days later after the start of cultivation NO 3 - The absorption amount of P may be controlled by setting 35% of the absorption amount of P as the absorption amount of P.
【００２６】図８は、図２のＣａおよびＭｇが２３°Ｃ
のときの栽培日数とイオン吸収量の関係のみを実験した
結果を示す図である。図中の（ ）内の数値は、Ｍｇの
吸収量に対するＣａの吸収量の割合（Ｍｇの吸収量÷Ｃ
ａの吸収量）を示している。この図から明らかなよう
に、Ｍｇのイオン吸収量は、Ｃａの吸収量の３０％〜４
０％程度として設定すればよい。FIG. 8 shows that Ca and Mg in FIG.
It is a figure which shows the result of having experimented only the relationship between the number of cultivation days and the amount of ion absorption at this time. The value in parentheses in the figure is the ratio of the amount of Ca absorbed to the amount of Mg absorbed (Mg absorbed / C
The absorption amount of a) is shown. As is clear from this figure, the ion absorption amount of Mg is 30% to 4% of the absorption amount of Ca.
It may be set as about 0%.
【００２７】[0027]
【発明の効果】本発明によれば、養液中に含まれている
Ｋ，Ｎ，Ｃａ，Ｐ，Ｍｇからなる主要成分のうちのＫ，
Ｎ，Ｃａしかイオン濃度が測定できなくても、Ｐ，Ｍｇ
のイオン濃度が測定できた場合と同様な養液濃度管理が
可能となる養液の制御方法を提供することができる。According to the present invention, K among the main components consisting of K, N, Ca, P and Mg contained in the nutrient solution,
Even if the ion concentration can be measured only for N and Ca, P and Mg
It is possible to provide a method for controlling a nutrient solution, which enables the same nutrient solution concentration management as when the ion concentration of can be measured.
【図１】本発明の養液の制御方法を実施するための装置
の概略構成を示すブロック図。FIG. 1 is a block diagram showing a schematic configuration of an apparatus for carrying out a method for controlling a nutrient solution of the present invention.
【図２】本発明の養液の制御方法を説明するためのＣａ
の栽培日数とmg／作物・日吸収量の関係を示す図。FIG. 2 is a diagram for explaining a method for controlling a nutrient solution of the present invention.
The figure which shows the relationship between the number of cultivation days and mg / crop, daily absorption.
【図３】本発明の養液の制御方法を説明するためのＭｇ
の栽培日数とmg／作物・日吸収量の関係を示す図。FIG. 3 is a diagram for explaining a method of controlling a nutrient solution according to the present invention.
The figure which shows the relationship between the number of cultivation days and mg / crop, daily absorption.
【図４】本発明の養液の制御方法を説明するためのＮＯ
3 ーＮの栽培日数とmg／作物・日吸収量の関係を示す
図。[FIG. 4] NO for explaining the method for controlling the nutrient solution of the present invention
The figure which shows the relationship between the number of cultivation days of 3 -N, and mg / crop, daily absorption.
【図５】本発明の養液の制御方法を説明するためのＰの
栽培日数とmg／作物・日吸収量の関係を示す図。FIG. 5 is a diagram showing the relationship between the number of days of cultivation of P and mg / crop / day absorbed amount for explaining the method for controlling the nutrient solution of the present invention.
【図６】本発明の養液の制御方法を説明するための養液
の成分元素とそのイオン形態および濃度の関係を示す
図。FIG. 6 is a diagram showing the relationship between the constituent elements of the nutrient solution and its ionic form and concentration for explaining the method for controlling the nutrient solution of the present invention.
【図７】本発明の養液の制御方法を説明するためのＮＯ
3 およびＰが２３°Ｃのときの栽培日数とイオン吸収量
の関係について実験した結果を示す図。FIG. 7: NO for explaining the nutrient solution control method of the present invention
The figure which shows the result of having experimented about the relationship between the cultivation days and the amount of ion absorption when 3 and P are 23 degreeC.
【図８】本発明の養液の制御方法を説明するためのＣａ
およびＭｇが２３°Ｃのときの栽培日数とイオン吸収量
の関係について実験した結果を示す図。FIG. 8 Ca for explaining the method for controlling the nutrient solution of the present invention
The figure which shows the result of having experimented about the relationship between the cultivation days and the amount of ion absorption when Mg is 23 degreeC.
１…養液タンク、２…養液栽培植物ベッド、３…養液、
４…養液タンク、５…ポンプ、６…配管、７…植物、
８，９，１０，１１…原液タンク、１２，１３，１４，
１５…流量調整弁、１６…イオンメータ、１７…サンプ
リングポンプ、１８…コントローラ、１９…イオン吸収
演算器。1 ... nutrient solution tank, 2 ... hydroponic plant bed, 3 ... nutrient solution,
4 ... nutrient solution tank, 5 ... pump, 6 ... piping, 7 ... plant,
8, 9, 10, 11 ... Stock solution tanks, 12, 13, 14,
15 ... Flow control valve, 16 ... Ion meter, 17 ... Sampling pump, 18 ... Controller, 19 ... Ion absorption calculator.
Claims (3)
Ｍｇ，Ｐの成分が含まれている養液を与えて該植物を栽
培する場合、 前記養液内の成分のうち、Ｃａのイオン吸収量を測定
し、この測定したイオン吸収量に応じた予め定められた
所定の割合又は所定の比率で前記Ｍｇの成分を補給する
養液の制御方法。1. The root of a plant contains at least K, N, Ca,
When the plant is cultivated by feeding a nutrient solution containing Mg and P components, of the components in the nutrient solution, the ion absorption amount of Ca is measured, and the ion absorption amount according to the measured ion absorption amount is calculated in advance. A method of controlling a nutrient solution for replenishing the Mg component at a predetermined ratio or a predetermined ratio.
Ｍｇ，Ｐの成分が含まれている養液を与えて該植物を栽
培する場合、 前記養液内の成分のうち、Ｎのイオン吸収量を測定し、
この測定したイオン吸収量に応じた予め定められた所定
の割合又は所定の比率でＰの成分を補給する養液の制御
方法。2. The root of a plant contains at least K, N, Ca,
When the plant is cultivated by feeding a nutrient solution containing Mg and P components, the amount of absorbed ions of N among the components in the nutrient solution is measured,
A method for controlling a nutrient solution in which a P component is replenished at a predetermined ratio or a predetermined ratio according to the measured ion absorption amount.
Ｍｇ，Ｐの成分が含まれている養液を与えて該植物を栽
培する場合、 前記養液内の成分のうち、Ｎのイオン吸収量を測定し、
この測定したイオン吸収量に応じた予め定められた所定
の割合又は所定の比率でＰの成分を補給するとともに、
このＰの成分の補給量の割合または比率を初期の段階で
はＮのイオン吸収量に比較して高めるようにした養液の
制御方法。3. The root of a plant contains at least K, N, Ca,
When the plant is cultivated by feeding a nutrient solution containing Mg and P components, the amount of absorbed ions of N among the components in the nutrient solution is measured,
While replenishing the P component at a predetermined ratio or a predetermined ratio according to the measured ion absorption amount,
A method for controlling a nutrient solution in which the proportion or ratio of the replenishment amount of the P component is increased in the initial stage as compared with the ion absorption amount of N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05045008A JP3105099B2 (en) | 1993-03-05 | 1993-03-05 | How to control nutrient solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05045008A JP3105099B2 (en) | 1993-03-05 | 1993-03-05 | How to control nutrient solution |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06253695A true JPH06253695A (en) | 1994-09-13 |
| JP3105099B2 JP3105099B2 (en) | 2000-10-30 |
Family
ID=12707349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05045008A Expired - Lifetime JP3105099B2 (en) | 1993-03-05 | 1993-03-05 | How to control nutrient solution |
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| Country | Link |
|---|---|
| JP (1) | JP3105099B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499984A (en) * | 2013-09-26 | 2014-01-08 | 北京农业智能装备技术研究中心 | Nutrient solution ion concentration control method and system |
| JP2018171020A (en) * | 2017-03-31 | 2018-11-08 | 株式会社フジタ | Nanobubble-containing water feeding device, plant cultivation system, culture solution feeding device and hydroponic system |
| KR102308623B1 (en) * | 2021-03-31 | 2021-10-05 | 농업회사법인 상상텃밭 주식회사 | Hydroponic cultivation bed and method of hydroponic cultivation using root growth information |
-
1993
- 1993-03-05 JP JP05045008A patent/JP3105099B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499984A (en) * | 2013-09-26 | 2014-01-08 | 北京农业智能装备技术研究中心 | Nutrient solution ion concentration control method and system |
| CN103499984B (en) * | 2013-09-26 | 2016-09-28 | 北京农业智能装备技术研究中心 | nutrient solution ion concentration control method and system |
| JP2018171020A (en) * | 2017-03-31 | 2018-11-08 | 株式会社フジタ | Nanobubble-containing water feeding device, plant cultivation system, culture solution feeding device and hydroponic system |
| KR102308623B1 (en) * | 2021-03-31 | 2021-10-05 | 농업회사법인 상상텃밭 주식회사 | Hydroponic cultivation bed and method of hydroponic cultivation using root growth information |
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| Publication number | Publication date |
|---|---|
| JP3105099B2 (en) | 2000-10-30 |
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