KR102308623B1 - Hydroponic cultivation bed and method of hydroponic cultivation using root growth information - Google Patents

Abstract

The present invention relates to a hydroponics bed. The hydroponics bed used in a hydroponics apparatus comprises: a bed in which a nutrient solution is supplied from the hydroponics apparatus and a plant is accommodated; a first outlet formed on an upper side of the bed to discharge the nutrient solution; a second outlet formed on a lower part of the bed to discharge the nutrient solution; and a valve controlling whether the nutrient solution is discharged through the second outlet. The hydroponics apparatus determines the root growth of the plant and controls the valve so that the nutrient solution is discharged through the first outlet or the second outlet.

Description

Hydroponic cultivation method using a hydroponic cultivation bed and root growth information {Hydroponic cultivation bed and method of hydroponic cultivation using root growth information}

The present invention relates to a hydroponic cultivation method using a hydroponic bed and root growth information.

Traditional plant cultivation is the use of soil to grow young plants with roots that are used to grow crops or propagate trees.

However, recently, hydroponics, in which plants are grown using a liquid nutrient solution regardless of soil, has been in the spotlight.

This type of hydroponics is a method of planting seedlings in a hydroponics bed and supplying nutrient solution to the roots.

There are various hydroponic cultivation techniques in this type of hydroponics. The most important criterion for classifying hydroponics is the form of providing water to plants. There are a variety of techniques, including those that supply water with a sprayer or humidifier nozzle.

Among these, the techniques with the highest industrial demand are the Nutrient Film Technique (NFT) and Deep Flow Techinuqe (DFT) techniques. There is a difference.

The NFT technique is named because the water level is kept very low so that the nutrient solution flows like a film.

The NFT technique has advantages in that the contact surface between plant roots and air is very large, so oxygen supply is smooth, and the water level is low, so the weight of the hydroponics bed is lowered, making multi-layer loading easy. The downside is that it can be damaged.

The DFT technique has a disadvantage in that it has a lower oxygen supply efficiency compared to the NFT technique, so an additional device such as a bubble generator is often installed, and the weight of the hydroponic bed increases, which incurs additional cost to bear the load for multi-layer loading. The stagnant water acts as a buffer even when the plant stops, so crop damage does not occur for several days.

However, in a large-scale plant factory system, water level control is required in relation to the root growth process of plants.

In large facilities, using the NFT technique to minimize the flow rate has great industrial and economic advantages, but it is beneficial to raise the water level like the DFT technique in the early stages of crop growth.

Therefore, the DFT method and the NFT method each have their own advantages and disadvantages, so there is an increasing demand to properly combine the advantages of both through water level control.

As such a prior art, there is Korean Patent Registration No. 10-1435906.

However, in the prior art, to change the technique after setting the DFT technique and the NFT technique once, disassembly-reinstallation of the bed is required. In a large plant factory system, about 12 crops are generally grown with one bed, Since a small number of 10,000 to as many as 200,000 crops are grown, to convert the NFT technique in the facility to the DFT technique, about 1,000 to 20,000 disassembly and reassembly processes are required, so there is a problem with low availability on an industrial scale. have.

In addition, in an environment suitable for plant growth, the growth rate of the roots is very fast and active, and as in the prior art, the height of the hydroponic bed is not high enough, so there is a problem that the roots block the tube, causing a reverse flow of the nutrient solution.

This is because cheap green vegetables have a short growth cycle and can be harvested before the roots become enlarged. However, for crops that require long-term cultivation, such as high value-added crops and fruits and vegetables, the nutrient solution cannot escape due to the roots being clogged and the nutrient solution flows backwards to the top of the hydroponics bed. This causes various problems such as malfunction of the system, leakage of nutrient solution, and blocking of nutrient solution supply in some sections.

The problem to be solved by the present invention is to provide a hydroponic cultivation method using a hydroponic bed and root growth information that can control the DFT technique and the NFT technique.

Another problem to be solved by the present invention is to provide a hydroponics method using a hydroponic bed and root growth information that does not stop operation due to additional installation or disassembly and reassembly when switching between the DFT technique and the NFT technique.

Another object to be solved by the present invention is to provide a hydroponics bed in which the hydroponic bed is not blocked by root growth of plants and a hydroponics method using root growth information.

In order to solve the above technical problems, the preferred

According to one aspect, in the hydroponics bed used in the hydroponics apparatus, receiving the nutrient solution from the hydroponics apparatus, the bed in which the plants are accommodated; a first outlet formed on the upper side of the bed to discharge the nutrient solution; a second outlet formed at the lower end of the bed to discharge the nutrient solution; and a valve for controlling whether the nutrient solution is discharged through the second outlet; including, wherein the hydroponics device determines the root growth of the plant so that the nutrient solution is discharged through the first outlet or the second outlet It is possible to provide a hydroponic bed for controlling the valve.

Here, in the determination of the root growth, the ion absorption rate of each plant root for the nutrient solution when the hydroponics device is discharged through the first outlet and the nutrient solution when discharged through the second outlet is analyzed Thus, it can be determined based on the disparity rate of the ion absorption rate of each plant root analyzed above.

In addition, further comprising; a root growth information acquisition unit installed in the bed to obtain root growth information, wherein the determination of the root growth may be determined based on the obtained root growth information by the hydroponics apparatus.

According to another preferred aspect of the present invention, the step of supplying a nutrient solution to the bed in which the plants are accommodated in the hydroponics apparatus; And controlling the valve so that the hydroponics apparatus determines the root growth of the plant so that the nutrient solution is discharged through the first outlet formed at the upper side of the bed or the second outlet formed at the bottom of the bed; Containing It is possible to provide a hydroponics method using root growth information.

Here, in the determination of the root growth, the ion absorption rate of each plant root for the nutrient solution when the hydroponics device is discharged through the first outlet and the nutrient solution when discharged through the second outlet is analyzed Thus, it can be determined based on the disparity rate of the ion absorption rate of each plant root analyzed above.

Here, the determination of the root growth may be determined based on the root growth information obtained from the root growth information acquisition unit installed in the bed by the hydroponics apparatus.

The present invention has the effect of providing a customized hydroponics technique for the growth of plants by adjusting the DFT technique and the NFT technique according to root growth.

In addition, the present invention has the effect of being able to switch the hydroponics technique without stopping the operation by switching the DFT technique and the NFT technique by determining plant root growth.

In addition, the present invention has the effect that the nutrient solution does not flow backwards because the hydroponics bed is not clogged even when the roots grow.

1 is a block diagram of a hydroponics apparatus according to an embodiment of the present invention.
Figure 2 is a configuration diagram of a hydroponics bed according to an embodiment of the present invention.
3 is a comparison view of a bed according to an embodiment of the present invention and a conventional bed.
4 is a view for explaining when the determination unit analyzes the deviation rate according to an embodiment of the present invention.
5 is a flowchart of a hydroponics method using root growth information according to another embodiment of the present invention.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to a specific embodiment, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

Terms including an ordinal number such as 1st, 2nd, etc. may be used to describe various components, but the components are not limited by these terms. These terms are used only for the purpose of distinguishing one component from another.

When a component is referred to as 'connected' or 'connected' to another component, it may be directly connected or connected to the other component, but other components may exist in between. It should be understood that there is On the other hand, when it is mentioned that a certain element is 'directly connected' or 'directly connected' to another element, it should be understood that the other element does not exist in the middle.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as 'comprise' or 'have' are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

1 is a block diagram of a hydroponics apparatus according to an embodiment of the present invention.

Figure 2 is a configuration diagram of a hydroponics bed according to an embodiment of the present invention.

3 is a comparison view of a bed according to an embodiment of the present invention and a conventional bed. Here, Figure 3 (a) is a bed 110 according to an embodiment of the present invention, Figure 3 (b) is a conventional bed.

1 to 3 , the hydroponics apparatus 10 includes a hydroponic cultivation bed 100 , a shelf 200 , a nutrient solution tank 300 , a determination unit 400 , a control unit 500 and a storage unit 600 . includes

The hydroponics bed 100 includes a bed 110 , a supply port 120 , a first outlet 130 , a second outlet 140 , a valve 150 , and a root growth information acquisition unit 160 .

The bed 110 accommodates plants, receives a nutrient solution from the nutrient solution tank 300 of the hydroponic cultivation device 10, and discharges the nutrient solution to the nutrient solution tank 300 of the hydroponic cultivation device 10 . Here, the bed 110 may be installed on the shelf 200 of the hydroponics apparatus 10 connected singly or in plurality.

In addition, the height (a) of the bed 110 is higher than the height (b) of the conventional bed 111, which can provide a space for the roots of plants to expand, and the second outlet by the roots of the grown plants. (140) is not blocked.

The supply port 120 is formed on the upper side and upper side of the bed 110 so that the nutrient solution is supplied to the bed 110 . At this time, when the bed 110 is installed on the shelf 200 alone, it is connected to the nutrient solution tank 300 by a pipe so that the nutrient solution moved from the nutrient solution tank 300 is supplied to the bed 110, and the bed 110 When a plurality of is installed on the shelf 200, the uppermost bed 110 is connected to the nutrient solution tank 300 by a pipe so that the nutrient solution moved from the nutrient solution tank 300 is supplied to the bed 110, and the bottom The bed 110 is connected to the first outlet 130 and the second outlet 140 of the upper end by a pipe so that the nutrient solution discharged from any one of the first outlet 130 and the second outlet 140 is the bed 110 . to be supplied to

The first outlet 130 is formed on the upper side of the bed 110 opposite the supply port 120 to discharge the nutrient solution.

The second outlet 140 is formed at the lower end of the bed 110 opposite the supply port 120 to discharge the nutrient solution.

At this time, when the bed 110 is installed on the shelf 200 alone, the first outlet 130 and the second outlet 140 are not connected to the supply port 120 and the pipe, but the nutrient solution tank 300 and the pipe connected to discharge the nutrient solution to the nutrient solution tank 300, and when a plurality of beds 110 are installed on the shelf 200, the first outlet 130 and the second outlet 140 at the top end are the supply ports at the bottom. It is connected to the tube 120 and discharges the nutrient solution through the supply port 120 to the bed 110 at the bottom so that the nutrient solution is supplied to the bed 110, while the first outlet 130 and the first outlet at the bottom 2 The outlet 140 is connected to the nutrient solution tank 300 by a pipe to discharge the nutrient solution to the nutrient solution tank 300 .

The second outlet 140 and the supply port 120 at the bottom have a size sufficient to discharge a nutrient solution flow rate of 100 L/m 2 h or more without resistance. For example, when the width of the bed 110 is 10 cm, the second outlet 140 and the supply port 120 at the bottom may have a diameter of 1 cm or more.

The valve 150 is installed in the pipe connected to the second outlet 140 or the second outlet 140 , and the nutrient solution through the second outlet 140 under the control of the controller 500 of the hydroponic apparatus 10 . closed or open to control whether the discharge of

The root growth information acquisition unit 160 is installed in the bed 110 to acquire root growth information. Here, the root growth information acquisition unit 160 is installed in the cultivation bed 110 by changing the position and number so that the entire root of the plant accommodated in the bed 110 can be photographed with a camera. The root growth information may be obtained by photographing the roots of the accommodated plant, or other sensors may be used to obtain root growth information other than a camera, and the root growth information obtaining unit 160 may be omitted.

The shelf 200 accommodates the bed 100 .

The nutrient solution tank 300 contains a nutrient solution for supplying nutrients for hydroponic cultivation of plants accommodated in the bed 110 . Here, the nutrient solution tank 300 may store the nutrient solution discharged from the bed 110 , and at least one of EC, pH, and other ion sensors is installed therein to provide the sensor value to the determination unit 400 . and the control unit 500 may receive liquid fertilizer or raw water from a liquid fertilizer tank (not shown) or a raw water tank (not shown) according to the control.

The determination unit 400 analyzes the ion absorption rate of the plant root using Equation 1 below based on the nutrient solution information, which is a sensor value obtained from a sensor installed in the nutrient solution tank 300 . In this case, the determination unit 400 may analyze the ion absorption rate of the plant root for the nutrient solution discharged through the first outlet 130 and the nutrient solution when discharged through the second outlet 140 , respectively.

[Equation 1]

은 뿌리 내부의 ion이라는 이름의 이온의 시간에 따른 조성변화,

은 이온의 물리적 특성으로

는 확산 상수, M은 분자량(단원자 이온의 경우에는 원자량)이며,

는 이온의 전기적 특성,

은 Goldman의 방정식으로 계산되는 식물 뿌리와 주변 사이의 상호 작용에 대한 계수이며,

는 식물종에 대한 계수, S는 이온이 흐르는 표면적으로 식물 성장에 대한 계수이다.)(here,

The composition change with time of the ion named ion inside the silver root,

As the physical properties of silver ions

is the diffusion constant, M is the molecular weight (atomic weight for monoatomic ions),

is the electrical property of the ion,

is the coefficient for the interaction between the plant root and its surroundings calculated by Goldman's equation,

is the coefficient for the plant species, and S is the coefficient for plant growth with the surface area through which the ions flow.)

In addition, the determination unit 400 analyzes the ion absorption rate of each plant root with respect to the nutrient solution when discharged through the first outlet 130 and the nutrient solution when discharged through the second outlet 140 , and analyzed The root growth of a plant is judged by analyzing the disparity in the ion absorption rate of each plant root. Here, when the disparity rate is large, the root growth of the plant does not occur, and when the nutrient solution is discharged to the second outlet 140, nutrients cannot be absorbed through the roots at a low water level of the nutrient solution, but the disparity rate will be at a certain level. In this case, when the root growth of the plant is sufficiently achieved and the nutrient solution is discharged to the second outlet 140 , nutrients can be absorbed through the roots even at a low water level of the nutrient solution, so the determination unit 400 determines the root growth of the plant based on the disparity rate. degree can be inferred.

In addition, the determination unit 400 compares the reference value of the deviation rate stored in the storage unit 600 to determine whether the reference value is less than or equal to the reference value of the deviation rate, and when the reference value is less than or equal to the reference value, it is determined as the opening time of the valve 150 . Here, the reference value of the discrepancy rate stored in the storage unit 600 is a value directly inputted by the user and specified, or is analyzed by performing machine learning based on the appropriate opening time of the valve 150 stored in the storage unit 600 input by the user. It may be a discrepancy rate at the appropriate opening time point.

In addition, when determining the root growth based on the root growth information acquired by the root growth information acquisition unit 160 , the determination unit 400 compares the root growth information standard value stored in the storage unit 600 with the root growth information standard value. It is determined whether or not it is abnormal, and when it is more than the root growth information reference value, it is determined as the opening time of the valve 150 . Here, when the root growth information acquisition unit 160 is a camera, the determination unit 400 uses CNN-based AI to vision-process the photographed roots of the plant to determine whether the photographed roots are greater than or equal to the root growth information reference value.

When the valve 150 is opened, which is determined by the determination unit 400 , the valve 150 is opened and the nutrient solution is discharged to the second outlet 140 , so that the nutrient solution level is low in the bed 110 Nutrient Film Technique (NFT) Even if it is a technique, it is the time when the roots of the plant can come into contact with the nutrient solution and absorb the nutrient solution.

The control unit 500 closes or opens the second outlet 140 by controlling the valve 150 based on the root growth determined by the determination unit 400 . Here, the control unit 500 may close or open the second outlet 140 according to a command directly input by the user other than the result value determined by the determination unit 400 .

Specifically, the control unit 500 determines the ion absorption rate of each plant root for the nutrient solution when the determination unit 400 is discharged through the first outlet 130 and the nutrient solution when discharged through the second outlet 140 . Based on at least one of the opening time of the valve 150 determined based on the deviation rate of to open the second outlet 140 .

In addition, the control unit 500 closes and opens the valve 150 by repeating the nutrient solution discharged to the nutrient solution tank 300 through the first outlet 130 and the second outlet 140 by the determination unit 400 through the second outlet 140 . Based on the nutrient solution discharged to the nutrient solution tank 300 , it is possible to analyze the ion absorption rate of the plant roots and analyze the disparity rate through the ion absorption rate of the analyzed plant roots.

In addition, the controller 500 controls the nutrient solution in the nutrient solution tank 300 to be supplied to the bed 110 .

The storage unit 600 stores the deviation rate reference value, the appropriate opening time of the valve 150 , the root growth information reference value, and the ion absorption rate of the plant roots analyzed by the determination unit 400 .

4 is a view for explaining when the determination unit analyzes the deviation rate according to an embodiment of the present invention.

Referring to FIG. 4 ( a ), the control unit 500 controls the valve 150 to be closed so that the nutrient solution supplied to the bed 110 is discharged through the first outlet 130 , and then the determination unit 400 . Analyzes the ion absorption rate of plant roots based on the nutrient solution discharged to the nutrient solution tank 300 through the first outlet 130 .

Referring to FIG. 4B , the control unit 500 opens the valve 150 within 30 minutes so that the nutrient solution supplied to the bed 110 is discharged through the second outlet 140 , and then the determination unit 400 ) to analyze the ion absorption rate of plant roots based on the nutrient solution discharged to the nutrient solution tank 300 through the second outlet 140 . Here, the opening of the valve 150 within 30 minutes is because, when the roots are exposed outside the nutrient solution for a long time, the roots may be damaged starting from the fine roots, and the opening time of the valve 150 depends on the moisture content or porosity of the medium, and the type of crop. may be further shortened or extended depending on the condition, and the ion absorption rate of plant roots is analyzed based on the nutrient solution discharged to the nutrient solution tank 300 at a time point after the valve 150 is closed.

Referring to FIG. 4( c ), the control unit 500 controls the valve 150 to be closed so that the nutrient solution supplied to the bed 110 is discharged through the first outlet 130 , and then the determination unit 400 . Analyzes the ion absorption rate of plant roots based on the nutrient solution discharged to the nutrient solution tank 300 through the first outlet 130 . Here, the determination unit 400 analyzes the ion absorption rate of the plant root based on the nutrient solution discharged to the nutrient solution tank 300 after the same time as the time of analysis in FIG. 4(b) .

The determination unit 400 determines the difference between the ion absorption rate of the plant root analyzed in FIG. 4(b) and the ion absorption rate of the plant root analyzed in FIG. 4(a) and the ion absorption rate of the plant root analyzed in FIG. 4(c) and The disparity rate is analyzed based on the difference in the ion absorption rate of the plant roots analyzed in FIG. 4( b ), and it is determined whether the analyzed disparity rate is less than or equal to the disparity rate reference value stored in the storage unit 600 .

At this time, when the determination unit 400 determines that the deviation rate is less than or equal to the reference value, the control unit 500 opens the valve 150 so that the nutrient solution supplied to the bed 110 is discharged through the second outlet 140 , and Nutrient Film Technique (NFT) technique to grow plants, and when the determination unit 400 is equal to or greater than the reference value of the deviation rate, the control unit 500 closes the valve 150 so that the nutrient solution supplied to the bed 110 is transferred through the first outlet 130 . While cultivating plants by DFT (Deep Flow Techinuqe) technique, the process of FIGS. 4(a) to 4(c) is repeated.

In the case of hydroponics, when the roots of the plant accommodated in the bed 110 are short in the initial period of growth, if a low flow rate of nutrient solution is provided by the NFT technique, the roots do not contact the nutrient solution and do not receive water and nutrients. If the plant roots are supplied with nutrients by providing a high water level using the technique, and when the roots of the plants are sufficiently grown to supply nutrients with the NFT technique, it is necessary to switch the cultivation technique to the NFT technique. ) determines the root growth of a plant capable of the NFT technique based on the discrepancy rate, so it is possible to switch between the DFT and the NFT technique without stopping the operation of the hydroponics apparatus 10 according to the root growth of the plant. In addition, since the determination unit 400 determines the root growth of a plant capable of the NFT technique based on the disparity rate, it is possible to control the DFT and the NFT technique for each bed 110 .

In addition, the height of the bed 110 of the hydroponic bed 100 of the present invention is higher than that of the conventional bed, thereby preventing the clogging of the first outlet 130 and the second outlet 140 by the roots during root growth of plants. Since the root growth is determined, the bed 110 may be exchanged or the plant may be removed from the bed 110 before the roots block the first outlet 130 and the second outlet 140 .

5 is a flowchart of a hydroponics method using root growth information according to another embodiment of the present invention.

Referring to FIG. 5 , in step S510 , the control unit 500 supplies the nutrient solution from the nutrient solution tank 300 to the bed 110 through the supply port 120 connected to the nutrient solution tank 300 by a pipe, and the valve 150 ) is closed.

In step S520 , the determination unit 400 analyzes the ion absorption rate of the plant root based on the nutrient solution discharged to the nutrient solution tank 300 through the first outlet 130 .

In step S530, the control unit 500 supplies the nutrient solution from the nutrient solution tank 300 to the bed 110 through the supply port 120 connected by a pipe to the nutrient solution tank 300, and controls the valve 150 to be opened. .

In step S540 , the determination unit 400 analyzes the ion absorption rate of the plant root based on the nutrient solution discharged to the nutrient solution tank 300 through the second outlet 140 .

In step S550 , the control unit 500 supplies the nutrient solution from the nutrient solution tank 300 to the bed 110 through the supply port 120 connected to the nutrient solution tank 300 by a pipe, and closes the valve 150 .

In step S560 , the determination unit 400 analyzes the ion absorption rate of the plant root based on the nutrient solution discharged to the nutrient solution tank 300 through the first outlet 130 .

In step S570, the determination unit 400 determines the difference between the ion absorption rate of the plant root analyzed in S540 and the ion absorption rate of the plant root analyzed in S520, the ion absorption rate of the plant root analyzed in S560, and the ion absorption rate of the plant root analyzed in S540. Analyze the disparity rate based on the difference of , and determine whether the analyzed disparity rate is below the disparity rate reference value stored in the storage unit 600. .

In step S580, the control unit 500 controls the valve 150 to be opened.

In FIG. 5, the determination unit 400 analyzes the deviation rate based on the ion absorption rate of the plant root, and the control unit 500 controls the valve 150 based on this to explain the hydroponics method, but the determination unit 400 Based on the root growth information obtained from the root growth information acquisition unit 160 other than the ion absorption rate of the plant roots, it is compared with the root growth information reference value stored in the storage unit 600 to determine whether it is greater than or equal to the reference value, and the controller 500 determines it Based on the control valve 150 can also be grown hydroponically.

Although the embodiments according to the present invention have been described above, these are merely exemplary, and those of ordinary skill in the art to which the present invention pertains will understand that various modifications and equivalent ranges of embodiments are possible therefrom. . Therefore, the true technical protection scope of the present invention should be defined by the following claims.

100: hydroponics bed 200: shelf
300: nutrient solution tank 400: judgment unit
500: control unit

Claims (6)

In the hydroponics bed used in the hydroponics apparatus,
receiving a nutrient solution from the hydroponics apparatus, a bed in which the plant is accommodated;
a first outlet formed on the upper side of the bed to discharge the nutrient solution;
a second outlet formed at the lower end of the bed to discharge the nutrient solution; and
Including; a valve for controlling whether the nutrient solution is discharged through the second outlet;
Control the valve so that the hydroponics device determines the root growth of the plant and the nutrient solution is discharged through the first outlet or the second outlet,
The determination of the root growth is the ion absorption rate of each plant root for the nutrient solution when the hydroponics device is discharged through the first outlet and the nutrient solution when discharged through the second outlet [formula 1] and judging based on the disparity in the ion absorption rate of each plant root analyzed above
Hydroponics bed, characterized in that.
[Formula 1]

(here,

The composition change with time of the ion named ion inside the silver root,

As the physical properties of silver ions

is the diffusion constant, M is the molecular weight (atomic weight for monoatomic ions),

is the electrical property of the ion,

is the coefficient for the interaction between the plant root and its surroundings calculated by Goldman's equation,

is the coefficient for the plant species, and S is the coefficient for plant growth with the surface area through which the ions flow.)
delete delete supplying a nutrient solution to the bed in which the plants are accommodated in the hydroponics apparatus; and
Controlling the valve so that the hydroponics apparatus determines the root growth of the plant so that the nutrient solution is discharged through a first outlet formed at the upper side of the bed or a second outlet formed at the bottom of the bed; Containing,
The determination of the root growth is the ion absorption rate of each plant root for the nutrient solution when the hydroponics device is discharged through the first outlet and the nutrient solution when discharged through the second outlet [formula 2] and judging based on the disparity in the ion absorption rate of each plant root analyzed above
Hydroponics method using root growth information, characterized in that.
[Equation 2]

(here,

The composition change with time of the ion named ion inside the silver root,

As the physical properties of silver ions

is the diffusion constant, M is the molecular weight (atomic weight for monoatomic ions),

is the electrical property of the ion,

is the coefficient for the interaction between the plant root and its surroundings calculated by Goldman's equation,

is the coefficient for the plant species, and S is the coefficient for plant growth with the surface area through which the ions flow.) delete delete

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