JP2014045769A - Intermittent type hydroponic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method in which a rhizosphere environment (a crumb structure) that is close to the environment of a soil culture is reproduced in a hydroponic planter through execution of intermittent water supplies and immediate water drainage at a maximum water level by using the principle of siphon.SOLUTION: An intermittent hydroponic device is provided in which nutritious liquid in a nutritious liquid adjustment storage tank 3 is supplied to an uppermost level cultivation planter A through a check valve 5 by the operation of a pump 4 activated by a predetermined timer and a sensor. The air inside the tube of a siphon tube 1 is being discharged in response to the level of the nutritious liquid. The drained nutritious liquid is supplied to and drained from a second highest level cultivation planter B, a third highest level cultivation planter C, and a fourth highest level cultivation planter D. Thus, water supply and drainage is automatically repeated on every level by a siphonic effect.

Description

Technology field

The present invention relates to a plant hydroponic cultivation apparatus.

Technology background

In the conventional plant nutrient solution cultivation system, the cultivation nutrient solution is determined at a certain height by adjusting the height of the drain port, and the water level (water depth) of the nutrient solution in the cultivation planter is determined by the height of the drain port. It was managed.
Even if the cultivation planter has a gradient and speeds up the flow, the nutrients are absorbed through the plant roots (hair roots, water roots) to the plant intended for cultivation, and it is in the nutrient solution of the cultivation planter. Therefore, it is difficult to cultivate potatoes, root vegetables and medicinal herbs.
Even with spray-type hydroponics technology, burdock, carrots, cocoons, etc. were not able to form the original shape of the plant and became a hair root state, and the shape of the cultivated plant could not be formed.
During the cultivation period of potatoes, root vegetables and medicinal herbs, with conventional hydroponic cultivation techniques, plant roots are always immersed in the nutrient solution unless the height of the drainage is adjusted. In order to promote growth, it is necessary to avoid the state where the roots are always immersed in the nutrient solution, or to drain the cultivated crops in the rhizosphere oxygen supply environment, and since moderate moisture is also required, the soil It is necessary to build a nodule structure environment for cultivation in a hydroponic planter. In the underground plant nourishing culture of potatoes, root vegetables and medicinal herbs, the roots were soaked in the nourishing solution and rotted and difficult to grow. It is means for solving the above problems.
References Hydroponic Society of Japan (Glossary for Japanese Hydroponic Research)

Problems to be solved by the invention

In a conventional hydroponic planter, it has been difficult to construct a rhizosphere environment such as soil cultivation even if any medium is used. If the nodule structure environment of the same conditions as soil culture cultivation is made in the hydroponic cultivation, potatoes, root vegetables and medicinal herbs can be cultivated. The conventional “DFT” method for deeply managing the nutrient solution level in the cultivation planter, the “NFT” method for shallowly managing the cultivation solution in the cultivation planter, and the root zone of the crop without the cultivation planter. There is a nourishing solution spray cultivation method in which the nourishing solution is sprayed in a mist form, but any cultivation method is difficult to cultivate potatoes, root vegetables and medicinal herbs. The problem is to reproduce the aggregate structure close to soil cultivation by hydroponics.

Means for solving the problem

In the hydroponics method, the present invention uses the siphon principle to reproduce the rhizosphere environment (aggregate structure) close to soil culture in the hydroponics planter by implementing intermittent water supply and full drainage immediately. It is a method to do.
It is possible to cultivate potatoes, root vegetables and medicinal herbs by constructing a rhizosphere environment close to soil cultivation by the hydroponics method. When it is necessary for the cultivated plant, the nutrient solution is sent to the cultivation planter at irregular intervals, and the drainage is carried out at the same time as the water is full. It is done within. The nutrient solution in the nutrient solution storage tank is pumped to the cultivation planter, the nutrient solution level of the planter rises, the nutrient solution in the planter reaches the top of the siphon, and at the same time the air in the siphon trough is exhausted. The siphon building is filled with nutrient solution. At this point, the nutrient solution in the cultivation planter is drained to the bottom of the siphon by the principle of siphon, and the water level in the planter is The water level drops to the height of the bottom water intake, the nutrient solution in the cultivation planter is drained, the surface water around the root, the water retention capacity of the cultivation medium is lost, the next nutrient solution water supply is not necessary, water supply extension This is a possible intermittent nutrient solution management method.
The highest level of nutrient solution in the planter is determined by the height of the top of the siphon bowl, and the bottom of the nutrient solution in the planter is determined by the height of the water inlet of the siphon bowl, so the top of the siphon bowl The maximum water level and the minimum water level of the cultivation planter and nutrient solution can be set by changing the height of the water intake of the siphon bowl. By making it removable, various sizes can be prepared and exchanged according to the growth of cultivars and plants.
By changing the shape of the flexible siphon bowl without changing the siphon at the top and bottom of the nutrient solution in the planter, the highest water level and the lowest water position can be changed to any height with the flexible siphon bowl. I can do it.
By using a culture medium with water retention capacity, it is possible to extend the nutrient solution supply interval.
In the cultivation planter, the water supply timing can be set by a timer and a hygrometer in the planter. As an example, when potatoes are cultivated, at the time of germination, water is supplied once every 12 hours. Water supply once every 3 days, water supply once a week during the harvest period, and optional water supply, drainage, maximum water level, and minimum water level can be set to any height depending on the cultivation item. By becoming. The effect of the present invention is to provide a cultivation environment for potatoes, root vegetables, and medicinal herbs, which has been provided with a rhizosphere environment close to soil cultivation and has been impossible to grow conventionally.

Effect of the invention

Since it is an intermittent hydroponic culture, it can provide a rhizosphere environment for cultivated crops close to soil cultivation.
The height of the nutrient water supply and drainage can be adjusted arbitrarily with the removable siphon.
In one cultivation planter, the drainage speed can be adjusted by changing the number and the inner diameter of siphon ridges.
By making an arbitrary shape with the siphon having a flexible structure, the highest water level position in the cultivation planter and the lowest water level position in the cultivation planter can be set to arbitrary heights.
Since the nutrient solution in the cultivation planter can be supplied and drained by the principle of siphon, expensive and sophisticated systems such as electromagnetic valves and water level sensors are not required, and the investment cost of plant factories can be reduced.
When it is necessary for the crop, nutrient solution is supplied into the cultivation planter, and the nutrient solution in the cultivation planter reaches the top of the siphon and drains to the bottom of the siphon in a short time. The near rhizosphere environment can be reproduced.
Since there is no regular nutrient solution in the cultivation planter, the structure can be simplified by not applying a planter load as compared with the NFT method and the DFT cultivation method.

FIG. 1 is a diagram showing the best mode of the present invention, and the flow of the entire nutrient solution is an overall view of intermittent nutrient solution cultivation due to the effect of siphon trough. It is a form suitable for reproducing the environment of the rhizosphere.

Overview of intermittent hydroponic planter Desorption siphon kit Flexible siphon dredge drawing

1. Siphon bowl 2, cultivation planter 3, nutrient solution adjustment storage tank 4, nutrient solution pump 5, reverse support valve 6, cultivation panel 7, cultivation crop 8, cultivation medium 9, bulkhead saw 10, flexible siphon bowl A, pump up Water level B, water level C due to siphon culm suction, flow of nutrient solution through siphon, top stage cultivation plantaro, second stage cultivation planta, third stage cultivation plantani, fourth stage cultivation planter

Claims (1)

Hydroponic planter with siphon trough

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