JPH04210531A - Water pipe apparatus for water culture - Google Patents

Abstract

PURPOSE:To obtain a readily handleable water pipe apparatus for water culture capable of avoiding fertilizer concentration damage by optionally dipping an absorption member in a culture solution, diluting and reducing the fertilizer concentration. CONSTITUTION:In a water pipe apparatus for water culture capable of storing a culture solution 2 in a cultivation vessel 1, placing and supporting a cultivated crop (P) through a culture medium 4 on a root-proofing sheet 3 arranged on the liquid surface and arranging a sheetlike liquid absorbing member 5 composed of a nonwoven fabric under the aforementioned root-proofing sheet 3, the liquid absorbing member 5 is supported with a hollow-like floating bed 6 floating on the culture solution 2 and the floating bed 6 is constructed so as to float and settle by supply and discharge of air from the outside. Or, the liquid absorbing member 5 is supported on a fixed cultivation bed and a hollow unit is simultaneously installed in the culture solution 2, and the hollow unit is inflated and contracted by supply and discharge of the air from the outside to construct the apparatus so as to enable change in the height of the liquid surface in the cultivation vessel 1.

Description

[Detailed description of the invention]

[0001]

[Industrial Field of Application] The present invention involves placing and supporting a cultivated crop above the liquid level of a cultivation container in which a culture solution is stored, through a root prevention sheet, and sucking the stored culture solution through a capillary tube. The present invention relates to a water tube hydroponic cultivation device in which a liquid absorbing member that penetrates and supplies the root sheet from the lower surface is disposed below the root prevention sheet. [0002]

[Prior Art] In the above-mentioned water tube hydroponic cultivation device, conventionally, for example, “Agricultural Facility Handbook (Toyo Shoten) JP23
As shown in Fig. 6, there is a system in which a liquid absorbing member (a water supply mat in the literature) is supported on a floating body made of expanded polystyrene that floats above the culture solution, and the liquid absorbing member sucks up the culture solution by capillary phenomenon. The structure is such that it is supplied to the roots of cultivated crops via a root prevention sheet. Then, while this culture solution moves within the liquid absorption member and is absorbed by the roots through the root prevention sheet, it takes in oxygen while coming into contact with the outside air, and supplies oxygen to the roots in a state dissolved in the culture solution. It looks like this. [0003]

[Problems to be Solved by the Invention] However, in the above-mentioned conventional technology, the culture solution only comes in contact with the outside air and takes in oxygen while it moves within the liquid absorption member and is absorbed by the roots via the root prevention sheet. Therefore, when the humidity of the external environment is low, the concentration of the liquid-absorbing culture solution increases as time passes, which may cause a problem in fertilizer concentration. The present invention has been made in view of the above circumstances, and provides a water tube hydroponic cultivation device that is simple in structure and easy to handle, which can avoid problems with fertilizer concentration while taking advantage of the ability to supply dissolved oxygen to the roots of cultured plants. The purpose is to provide it as something easy to use. [0004]

[Means for Solving the Problems] The characteristic structure of the first invention is that in the water tube hydroponic cultivation apparatus described above, the liquid absorbing member is supported by a floating bed that floats on the culture solution, and the floating bed is used for cultivation. It is formed of a hollow body that expands and contracts by supplying and discharging air from outside the container, and the floating bed is configured to float and sink by supplying and discharging air. The characteristic configuration of the second invention is as follows:
In the water tube hydroponic cultivation device mentioned above, the liquid absorption member is supported on a fixed cultivation bed, and a hollow body is provided in the stored culture solution that expands and contracts by supplying and discharging air from outside the cultivation container, The height of the liquid level in the container can be changed by expanding and contracting this hollow body. [0005]

[Operation] According to the structure of the first aspect of the invention, the floating bed itself is expanded and contracted to float and sink relative to the culture solution, and this sedimentation dilutes the concentration of the culture solution in the liquid absorbing member. [0006] Also, according to the configuration of the second invention, the liquid level of the culture solution is raised and lowered by expanding and contracting the hollow body, and as the liquid level rises, the entire liquid-absorbing member is immersed in the culture solution to absorb the liquid. Perform dilution of the culture solution concentration in the member. [0007]

Therefore, according to the present invention, it is now possible to dilute and reduce the fertilizer concentration by immersing the liquid absorbing member in a large amount of stored culture solution, thereby avoiding the problem of fertilizer concentration. In addition, since this dilution operation and restoration to the original cultivation state are as simple as supplying and discharging air, the structure is simple and easy to handle. [0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention of the wood brush 1 will be described as a first embodiment, and the second invention will be described as a second embodiment, based on the drawings. [0009] <Example 1> As shown in FIG. 1, a culture solution 2 was stored in a cultivation container 1,
A cultivated crop P is placed and supported on a root prevention sheet 3 placed above the surface of the culture solution 2 via a medium 4 such as rock wool or sponge, and a non-woven cloth is placed below this root prevention sheet 3. A water tube hydroponic cultivation apparatus is constructed by supporting a sea-shaped liquid absorbing member 5 consisting of a floating bed 6 floating above a culture solution 2. The root prevention sheet 3 has fine holes through which the roots of the cultivated crop P cannot pass, and
The presser is fixed by a lid 7 which is placed on the container from above by being engaged with the edge of the container. The floating bed 6 is a hollow body made of plastic, and all sides thereof are formed into a bellows shape so that it can expand and contract up and down. It is connected in communication with the air supply/drainage pump 10 on the other side. The water tube hydroponic cultivation apparatus of the first invention is configured as described above, and by supplying air to the floating bed 6 through the pump 10, the floating bed 6 expands upward, and as shown in the figure, the floating bed The liquid-absorbing member 5 on top of the liquid-absorbing member 5 comes into contact with the root prevention sheet 3 above, and the culture solution absorbed by the capillary phenomenon inside the liquid-absorbing member 5 is supplied to the culture medium 4 of the cultivated crop P from this contact area. be done. Also, switch cock 9 and pump 1.
By forcibly discharging air from the floating bed 6 through 0, the floating bed 6 contracts downward, and the entire liquid-absorbing member 5 on this floating bed 6 is immersed in the culture solution 2, and the concentration of the culture solution in the liquid-absorbing member 5 decreases. dilute. Note that this dilution operation is performed several times a day, either manually or automatically. [00101 <Example 2> As shown in FIG. 2, a culture solution 2 was stored in a cultivation container 1,
A cultivated crop P is placed and supported via a medium 4 on a root prevention sheet 3 installed above the surface of the culture solution 2, and is connected to catch and support the lower surface of this root prevention sheet 3. Covering the fixed cultivation bed 11 with a sheet-like liquid absorbing member 5,
Furthermore, a hollow body 12 made of rubber that can expand and contract is attached and fixed to the bottom of the cultivation container 1 to constitute a water tube hydroponic cultivation device. The root-prevention sheet 1 to 3 is supported by the cultivation container 1 with the same configuration as described above (Example 1).The cultivation bed 11 is a hollow box-shaped thing with an open bottom and a ventilated upper surface and surrounding area. The hollow body 12 is arranged within this cultivation bed 11.The hollow body 12 is connected to the hose 8 and the flow path switching cock 9.
It is connected to the pump 10 via. In this configuration, by removing the air from the hollow body 12 at all times, the culture solution 2
The liquid level of the cultivation bed 1] is set to a lower height than the top surface of the cultivation bed 1, and the pump 10 is activated as needed (several times a day) to pump the hollow body 12.
is inflated as shown by the imaginary line in the figure. As a result, the liquid level of the culture solution 2 is raised to a position higher than the top surface of the cultivation bed 11, and the fertilizer concentration on the top surface of the absorption member 5 is diluted and reduced. [00111 Note that although reference numerals are written in the claims section for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by the entry.

[Brief explanation of the drawing]

[Fig. 1] A vertical cross-sectional view of a water tube hydroponic cultivation device showing an embodiment according to the first invention.

FIG. 2 is a vertical cross-sectional view of a water pipe hydroponic cultivation device showing an embodiment according to the second invention [Explanation of symbols 1 1 Cultivation container 2 Culture solution 3 Root prevention sheet 5 Liquid absorbing member 6 Floating bed 11 Cultivation bed 12 Hollow body P Cultivated crops

Claims (2)

[Claims] [Claim 1] A cultivated crop (
A liquid absorbing member (5) is disposed below the root prevention sheet (3) for placing and supporting the root prevention sheet (3) and sucking the stored culture solution (2) into the root prevention sheet (3) from the bottom surface. In the water pipe hydroponic cultivation apparatus, the liquid absorbing member (5) is supported by a floating bed (6) floating above the culture solution (2), and the floating bed (6) is removed from the outside of the cultivation container (1). The floating floor (6) is formed of a hollow body that expands and contracts by supplying and discharging air.
A water pipe hydroponic cultivation device configured to be able to float and sink by supplying and discharging air. [Claim 2] Cultivated crops (
A liquid absorbing member (5) is disposed below the root prevention sheet (3) for placing and supporting the root prevention sheet (3) and sucking the stored culture solution (2) into the root prevention sheet (3) from the bottom surface. In the water pipe hydroponic cultivation apparatus, the liquid absorption member (5) is supported on a fixed cultivation bed (11), and the stored culture liquid (2) is supported on a fixed cultivation bed (11).
The inside of the cultivation container (1) is equipped with a hollow body (12) that expands and contracts by supplying and discharging air from outside the cultivation container (1).
2) A water tube hydroponic cultivation device configured to be able to change the height of the liquid level in the container by expanding and contracting.