JPS6211037A - Nutrient solution culture apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a hydroponic cultivation device, which activates appropriate nutrient solution immersion and air supply to the roots of cultivated plants, and By being immobilized, it is possible to stabilize the posture of the plant.

(Conventional technology) Conventional hydroponic cultivation techniques include a method in which air is mixed into a nutrient solution bed filled with nutrient solution using an air sucker, and a method in which the nutrient solution is periodically exchanged with equal weight using a tank. , on a tilted nutrient ped, l! ! There are methods such as pouring the nutrient solution into a thin film, and filling a nutrient solution bed with water and floating a submersible floating medium on top of the nutrient solution bed.

These conventional techniques supply air in various ways while immersing plant roots in a nutrient solution. One is to replenish dissolved oxygen in the nutrient solution using an air sucker, one is to periodically interrupt immersion in the nutrient solution to expose the roots to air, and one is to use a medium between the nutrient solution and the roots. It's a method.

(Problems to be Solved by the Invention) In the hydroponic cultivation using the above-mentioned known technology, it is difficult to control the amount of nutrient solution supplied to the roots of cultivated plants to the optimum amount according to the type and growth stage of the plant. be. In particular, as the growth stage of the plant progresses and the amount of roots increases, the multiplied roots begin to spread over the surface of the nutrient solution bed, severely impairing the flow of the nutrient solution and resulting in insufficient and insufficient supply of nutrients. Not only will it become uneven, but even if the liquid supply is interrupted.

The nutrient solution that exists between the roots does not easily run out and sufficient air supply is no longer provided.

Furthermore, in any of the known techniques, the roots of cultivated plants exist in an unstable manner, and unlike the case of soil cultivation, it is impossible to maintain the posture of the plant body by the plant roots themselves.

(Means for Solving the Problem) In order to solve such technical problems, the present invention provides a system in which a plant root support net 4 is installed on the bottom of the hydroponic cultivation bed 1 shown in FIG. 1, which is a specific example thereof. be done. 4 is a semi-cylindrical hollow pipe having a mesh structure, and is installed so as to be located directly below the planting hole 3.

Nutrient solution 5 is used when the cultivated plant is a young plant, such as immediately after planting, or
For plants that essentially prefer their roots to be immersed in the nutrient solution at all times, the water depth is maintained to such an extent that the plant root support net 4 is submerged. Conversely.

When a cultivated plant is in its prime growing season and its rhizosphere has increased, when it is necessary to forcibly restrict the supply of nutrient solution to control growth, or when the roots are essentially submerged in the nutrient solution. For plants that dislike plants, the nutrient solution 5 is maintained at a depth that exposes the top of the plant root support net 4.

(Function) Hydroponic cultivation is carried out by passing the nutrient solution 5 through the hydroponic bed in which the plant root support 4 shown in FIG. 1 is installed in the lower stage.

As shown in FIG. 2, the crops are placed in planting holes 6 drilled in the planting board 2, with plant bodies 9 wrapped in urethane mat pieces 8.
is planted.

As the roots 10 of the planted plants 9 grow, they grow so as to become entangled with the plant root support net 4 installed at the bottom.

It is possible to adjust the amount of nutrient solution supplied to maximize root activity when the water requirement of the plant is 2% by adjusting the water depth of the nutrient solution 5, and when the water supply is interrupted, the lower part of the plant root support network 4 Alternatively, since the inside is hollow, the nutrient tL5 can be removed from the nutrient solution bed in a short time.

(Effect) In a nutrient bed without a conventional plant root support net, even if the bed is tilted a little over 1, as the roots of the plants grow, the roots of the nutrient solution will reach 1! @ Stagnation was unavoidable, and even with the method of floating a submersible floating medium on top of the nutrient solution, it was difficult to maintain the posture of the plant because the plant roots were just crawling on the floating medium. .

However, by installing the plant root support network according to the present invention, even when the plant grows and the root group develops, the rhizosphere accumulation of nutrient solution can be removed by the action of the hollow part of the plant root support network. . In addition, the fine roots of the plant become entangled in the microscopic holes of the plant root support network, allowing the plant to stabilize its posture independently with its own roots.

Removal of the rhizosphere stagnation of nutrient solution promotes the vigorous development of aerial roots, and when adding nutrient solution, a correctly adjusted nutrient solution is always given. This means that even if it becomes necessary to restrict the liquid supply, it can be dealt with immediately.

Also, plants can use their roots to stabilize their posture.

It is possible to prevent growth delays and stem bending due to idle drudging of the stems and roots during growth, resulting in great improvements in growth quantity and quality.

(Example) 1. Kasumisou Kasumisou has roots that are sensitive to excess moisture, and in most cases, it is difficult to maintain water during the mid-growth period, not only in flooded hydroponic cultivation but also in sloped nutrient bed cultivation when water is supplied for two periods. By now the roots had rotted. However, in the hydroponic cultivation bed in which the plant root support net of the present invention was installed, smooth growth was observed, and 5 to 8 flowering stems were obtained under 2 lighting conditions.

Z-kiku-kiku's hydroponic cultivation is already being practiced commercially using conventional tilted hydroponic bed cultivation. However, the conventional method of fixing the stems in the planting hole with pieces of urethane cloak does not prevent the stems from moving back and forth.

The probability of obtaining straight stems was around 60%, and the thickness of the stems was thinner than in soil cultivation.

However, in the hydroponic cultivation bed in which the plant root support network of the present invention is installed, 100% of straight stems can be obtained.

The thickness of the stems also exceeded that of soil cultivation.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the hydroponic cultivation apparatus of the present invention;
The figure is a cross-sectional view when a plant is planted into the hydroponic cultivation apparatus of the present invention through a planting hole. In addition, in one drawing, 1; nutrient solution ped; 2; planting board;
3; planting hole; 4; semi-cylindrical plant root support net; 5; nutrient solution;
6; Planting plate support, 7; Bottom of nutrient solution bay, 8;
Urethane mat piece, 9; plant body; 10; plant root.

Claims (1)

[Claims] A hydroponic cultivation device in which a semi-cylindrical hollow pipe with a mesh structure is installed at the bottom of a nutrient solution bed.