JPH0380451B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a cultivation bed for plants, particularly a cultivation bed effective for hydroponic cultivation, and a method for forming the same.

<Prior art> Generally, in order to form a cultivation bed, a deep trench is dug in a suitable location on the cultivation land, the bottom of the trench is leveled, and a frame is formed using wood or concrete.
At least its inner wall and bottom are waterproofed, or it is formed by connecting U-shaped groove-shaped blocks made of concrete, foamed polystyrene, or the like to a certain size.

In hydroponic cultivation, it is required that the culture solution placed in the cultivation bed be maintained uniformly and of the same quality throughout, and for this reason, the bottom of the cultivation bed must be formed horizontally.

In the above-mentioned forming method, when the frame is arranged or when the blocks are connected, waterproofing treatment is required at the connecting portions, which requires a great deal of labor. In addition, placing them in rows with their bottoms horizontal requires considerable skill in terms of ground preparation, and requires a lot of cost and effort in terms of materials and labor.

In order to overcome these drawbacks, the applicant previously proposed Japanese Patent Application No. 58-245477.

However, in the invention according to the application, since a fluid mixture of the soil solidification material, earth and sand, and water is poured into the base recess, a large amount of the soil solidification material is used, which is uneconomical.

In addition, since all of the fluid poured into the foundation recess hardens, water becomes scarce and the heat storage effect of the soil is lost.

<Objective of the present invention> The present invention was proposed in order to eliminate the above-mentioned drawbacks, and it aims at reducing labor, costs for materials etc. are low, and can be easily formed, especially at the bottom of the cultivation bed. It is an object of the present invention to provide a simple method for forming a cultivation bed that can extremely easily form a horizontal surface.

Another object of the present invention is to provide a method for forming cultivation beds using a small amount of soil compaction material.

Still another object of the present invention is to provide a cultivation bed that has a heat storage effect.

<Structure of the present invention> The present invention comprises: a base recess formed in an appropriate length and width at a suitable location on a cultivation site; a watertight flexible film covering the recessed bottom and side walls of the base recess;
A mud layer formed inside the flexible film, a hardened soil layer laminated on the muddy layer and having a substantially horizontal surface, and a watertight flexible film covering the hardened soil surface. A base concave portion of arbitrary length and width is formed at an appropriate location in a cultivation bed and cultivation site consisting of, and a watertight flexible film is arranged to cover the concave bottom and side walls of the base concave portion, and the flexible A mixture of earth and water is cast inside the film to form a muddy layer, and then a fluid mixture of a soil solidification material, earth and water is laminated on top of the muddy layer, This method of forming a cultivation bed is characterized in that after the fluid has hardened and the bed floor has been formed substantially horizontally, a watertight flexible film is disposed to cover the top surface of the bed.

<Example> Hereinafter, the present invention will be explained based on an example shown in the drawings.

First, a base recess 1 is formed at a suitable location on a cultivation site with an arbitrary length and width. When forming this base recess 1, as shown in Fig. 1a, it can be formed by filling the area that will become the side wall with mounds 2, or by installing wooden or plastic plates 3, frame materials 4, etc. (Fig. 1 b, c), or the site may be dug up. Various options are available.

Next, a watertight flexible film 5 is applied to cover the concave bottom portion 1a and side wall portion 1b of the base concave portion 1.
Place.

Next, a mixture of earth and sand and water is placed inside the film 5 to form a muddy layer 6.

Then, wait until the surface of the muddy layer 6 becomes approximately horizontal, and after it becomes approximately horizontal, a soil solidification material is sprinkled on the surface of the muddy layer 6 to close the vicinity of the surface of the muddy layer 6. A fluid layer 7 made of a fluid mixture of a soil solidification material, earth and sand and water is laminated on top of the mud layer 6 by stirring.

Note that the fluid layer 7 may be formed by pouring a fluid mixture of a soil solidification material, earth and sand, and water onto the surface of the mud layer 6.

After the fluid layer 7 containing the soil solidifying material is hardened to form a bed bed portion of an appropriate thickness, a watertight flexible film 8 is disposed to cover at least the upper surface thereof.

In addition, when forming the base recess 1, the same base recess 1 as described above can also be used as a groove-like recess formed by mixing a soil solidifying material into the soil (sand) of the site, etc., and solidifying the side walls and the bottom of the recess. can be formed.

When the side walls and the concave bottom are formed by mixing the soil solidification material in this way, cultivation beds can be easily formed without improving the ground over a wide area, especially in areas with soft ground.

Note that known soil solidification materials are used, such as SiO ₂ , Al ₂ O ₃ , Fe ₂ O ₃ , CaO,
Contains MgO, SO ₃ , more than normal cement
A cement-based soil solidification material with a small molar ratio of Al ₂ O ₃ /SO ₃ is suitable.

As a result, ettringite (3CaO・Al ₂ O ₃・
It stably generates 3CaSO ₄ 32H ₂ O), forms bridges between soil particles, and exhibits solidification strength.

As shown in FIG. 3, if the pipe 9 is arranged so as to penetrate the flexible film 8 and the fluid layer 7 so that a large number of small holes 9a are scattered in the mud layer 6, the fluid layer 7 After the cultivation bed is formed by hardening, water can be supplied to the muddy layer 6 through the pipe 9, which is convenient for heat storage.

<Effects of the present invention> In the cultivation bed of the present invention, a watertight flexible film is provided to cover the bottom and side walls of the base recess, and a muddy layer consisting of earth and sand and water is formed on the film. A fluid layer is formed on top of the muddy layer by mixing soil solidifying material, earth and sand, and water, the fluid layer is hardened, and a watertight flexible film is placed to cover the hardened soil. The bottom of the bed is formed horizontally by the fluid, so that the culture solution for hydroponic cultivation can be uniformly supplied throughout the bed, and the plants grown here can be of consistent quality.

In addition, the moisture contained in the muddy layer consisting of earth, sand, and water is prevented from leaking out by a watertight film, so a muddy layer containing moisture is always placed at the bottom of the cultivation bed, which has a heat storage effect. big.

According to the formation method of the present invention, even if the bottom surface of the base recess is sloped or has some unevenness, the muddy layer and fluid can flow and be formed horizontally, and the cultivation bed can be formed horizontally. Depending on the scale, the bed bottom can be easily formed horizontally by adjusting the amount of muddy layer.

In addition, compared to the method of pouring only a fluid mixture of soil solidification material, earth and sand, and water into the foundation depression and hardening the fluid to form the cultivation bed, the amount of soil solidification material required is small. Furthermore, since the water contained in the muddy layer and the fluid does not permeate to the outside of the flexible film 5, and the fluid slowly hardens, the bottom of the groove in the cultivation bed can be formed more horizontally.

In addition, by arranging a watertight flexible film to cover the top surface of the bed bed after the fluid has hardened, leakage of the culture solution can be prevented, and the reduction and concentration change of the culture solution due to leakage can be prevented. There is no change in the properties of the culture medium due to direct contact with the bed floor (e.g.
PH change) can also be prevented, and a cultivation bed that can maintain optimal conditions for plant cultivation can be provided.

Further, according to the present invention, the base recess is formed by filling or digging, and after the film is placed, a mud layer and a solidifying fluid are placed, and after the fluid hardens, it is placed on the top surface. Since the cultivation bed can be formed using a flexible film, the cost of materials is low, and the cultivation bed can be easily formed without the use of skilled workers.

[Brief explanation of drawings]

1a to 1c are cross-sectional views of base recesses formed by various methods, FIG. 2 is a cross-sectional view showing one embodiment of a cultivation bed formed according to the present invention, and FIG. 3 is a cross-sectional view showing another embodiment of the cultivation bed formed according to the present invention. FIG. 1...Base recess, 5...Flexible film, 6...
Muddy layer, 7...Fluid, 8...Flexible film.

Claims (1)

[Scope of Claims] 1. A base recess formed at an appropriate length and width on a cultivation site, a watertight flexible film covering the recessed bottom and side walls of the base recess, and an inner part of the flexible film. A cultivation bed comprising: a muddy layer formed; a hardened soil layer laminated on the muddy layer and having a substantially horizontal surface; and a watertight flexible film covering the hardened soil surface. 2. Form a base recess with arbitrary length and width at a suitable location on the cultivation land, arrange a watertight flexible film to cover the bottom and side walls of the base recess, and fill the inside of the flexible film with earth and sand. and water to form a muddy layer, and then a fluidy mixture of a soil solidification material, earth and sand, and water is layered on top of the muddy layer, and the fluid is 1. A method for forming a cultivation bed, which comprises disposing a watertight flexible film to cover the upper surface of the bed after the bed has hardened and is formed substantially horizontally. 3. The method according to claim 2, wherein the fluid is formed by scattering a soil solidification material on the surface of the muddy layer and stirring the vicinity of the surface of the muddy layer.