JPH11332404A - Method and device for growing seedling through the water culture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the seedlings from being contaminated with microorganisms and facilitate the control of the device for the water culture by placing a mat- like nursery bed on the supporting plate and circulate the water beneath the support plate with a prescribed distance from the support plate. SOLUTION: A mat-like nursery bed 1 for growing seeds or seedlings is placed on the supporting plate 2 and a water flow path is disposed beneath the supporting plate 2 to circulate water so that the water surface 3 may keep a prescribed distance. The mat-like nursery bed 1 is prepared by forming the rice chaff, pulp, rock wool or the like to mats. The water to be circulated is preferably warm. The supporting plate 2 is preferably partitioned according to the shape and size of the nursery bed in order to inhibit the infestation and contamination of microorganisms. In addition, in order to efficiently circulate water, the water flow path is made of a vertically double-path way. In a preferred embodiment, the whole nursery system is shielded with vinyl sheet or the like in order to keep the humidity and temperature of the nursery beds at prescribed levels.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to the raising of plants. More specifically, the present invention relates to a method and an apparatus for raising plants in a hydroponic system.

[0002]

2. Description of the Related Art In recent years, a technique for raising rice and other plants on a long mat (long mat) by a hydroponic seedling raising method has been developed from the viewpoint of labor saving in work processes such as rice planting. This technique is generally performed in the following procedure. That is, a non-woven fabric (for example, 28 cm wide × 6 m long) is laid in a water tank (for example, 30 cm wide × 6 m long × about 10 cm high), warm water is put in the water tank, immersed in the non-woven fabric, seeded, and warm water (about 30 cm long).
℃) intermittently, germinating and rooting. Further, the fertilizer component is circulated from a commercially available liquid fertilizer tank for water culture to a nursery tank, the seedlings are raised for 14 to 15 days, the seedlings are raised into 3.2 seedlings, and the raised long mat is wound up. It is to be transplanted to.

[0003]

In the conventional hydroponic seedling, the seed-borne disease-causing microorganisms such as fir blight bacteria and fungi such as fusarium are transported by the circulating warm water to form the entire water tank. And spread throughout the seedlings, forcing them to be discarded. On the other hand, in order to make the growth condition of the seedlings uniform, it is necessary to keep the floor where the seedlings are raised horizontally so that the seeds are not flooded by the circulating water, and carefully adjust the flooding amount. That is, an extremely complicated operation for keeping the humidity of the nursery bed uniform is required. Therefore, an object of the present invention is to solve the problems of the prior art, and to provide a hydroponic seedling raising method that does not infect the seedlings with microorganisms and is easy to manage, and an apparatus used for the method.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned situation, the present inventors have conducted intensive studies to develop a hydroponic seedling raising technique that can prevent contamination by microorganisms and that is easy to handle. By keeping a certain distance between the plant and the nursery, the inventors have focused on solving the above problems, and as a result of further research, the present invention has been completed.

That is, the present invention relates to a hydroponic seedling raising device for plants, which comprises a mat-shaped seedling bed and a support plate on which the seedbed is placed.
The present invention relates to the seedling raising apparatus, further comprising: a flow path in which water flows under a predetermined distance below the support plate. Furthermore, the present invention relates to a method for hydroponically raising seedlings of plants, wherein seeds or seedlings are placed on a mat-shaped seedling bed placed on a support plate, and water is kept at a predetermined distance below the support plate. The present invention relates to the method for raising seedlings, wherein the mat is maintained at a constant humidity in the mat-type raising bed by refluxing.

According to the present invention, since the circulating water and the nursery bed are isolated from each other, even if a part of the seed is contaminated with microorganisms, the damage is limited to only the peripheral part of the seed and circulates. Water prevents the entire nursery from spreading.

Further, in the present invention, the water is circulated downward, and the water vapor gives a certain humidity to the nursery bed through a water-absorbing support plate (for example, a wooden plate). Even if the tank is not strictly leveled, uniform seedlings can be easily obtained.

[0008] Generally, the adjustment of water content during seedling raising is as follows.
When the water content is excessive, the seedlings grow long and often have an adverse effect on the subsequent cultivation.However, the seedling raising method based on the evaporating humidity in the present invention can provide the necessary minimum water to the nursery bed, You can prevent the squire.

[0009] In the present invention, the plant to be raised is typically a rice plant, but is not particularly limited as long as it is a plant to which the hydroponic seedling is applied. As the mat-shaped nursery bed in the present invention, any material may be used as long as it is a hygroscopic material. For example, plant materials such as rice hulls, pulp, peat moss, and bark, or rock wool, and a water-absorbing polymer are formed into a mat shape. Can be used. Further, it is preferable that the refluxing water is warm water so that sufficient steam is supplied to the plant physiological surface and the support plate during the seedling raising.

As the support plate, any material can be used as long as it can transmit the evaporated water to the nursery bed and can support the nursery bed, and a wooden plate or a synthetic resin plate provided with a large number of holes is used. 1 and 2). Further, in order to prevent the spread of contamination by microorganisms, it is preferable that the support plate is partitioned according to the shape of the mat-shaped nursery bed.

Although the seedling raising apparatus of the present invention may be arranged in any manner, it is preferable that the flow path is formed in a multi-tiered manner in order to circulate water efficiently. Further, it is preferable to cover the entire seedling raising device with a shielding material such as vinyl for keeping moisture and temperature of the seedling raising bed, that is, so that moisture evaporating from circulating hot water gives the nursery bed a certain humidity and temperature. Further, at the time of raising seedlings, fertilizer nutrients, pesticides and the like can be adsorbed to the nursery beds as needed.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The method and apparatus for raising seedlings according to the present invention will be described below with reference to the drawings, but it goes without saying that the present invention is not limited to these. One embodiment of the hydroponic seedling raising apparatus for plants according to the present invention is shown in FIG. For example, a mat-like nursery bed made of rice hulls (1), a support plate (2) made of, for example, a wooden plate on which the nursery bed is placed, and a water surface (3) below the support plate and a predetermined distance are maintained. It comprises a water tank (4) having a flow path for returning water. Since the nursery bed and the flow path are always kept at a fixed distance in this manner, contamination by microorganisms and the like can be prevented, and adjustment of a small amount can be performed extremely easily. Another embodiment of the hydroponic seedling raising apparatus according to the present invention is shown in FIG. Here, a root cutting sheet (5) made of paper or the like is provided below the floor. Further, a porous synthetic resin plate (6) provided with a passage hole is used as a support plate. Others are the same as those in FIG. FIG. 3 shows a multistage seedling raising apparatus according to the present invention. Nursery beds are arranged in a multi-tiered manner, and a water tank (4) having a flow path through which water circulates through the entire apparatus with the water surface kept at a predetermined distance is provided below the support plate of each nursery bed. . The support plate is sectioned according to the shape of the nursery bed. The multi-stage seedling raising device contributes to space saving and is easy to handle.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a hydroponic seedling raising apparatus for plants according to the present invention.

FIG. 2 shows another embodiment of the hydroponic seedling raising apparatus according to the present invention.

FIG. 3 shows an embodiment (elevation view and side view) of an upper and lower multistage hydroponic seedling raising apparatus according to the present invention.

[Explanation of symbols]

 1, 1 '... mat-shaped nursery bed 2 ... wooden support plate 3, 3' ... water surface 4, 4 ', 4 "... water tank 5 ... ···· Root cutting sheet 6 ····· Support plate made of porous synthetic resin 7 ······ Ventilation hole

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Tetsuhei Morisaki 5-5-1 Higashi-Hachiman, Hiratsuka-shi, Kanagawa Pref.

Claims (13)

[Claims] 1. A hydroponic seedling raising device for plants, comprising: a mat-shaped nursery bed, a support plate on which the nursery bed is placed, and a flow in which water refluxes at a predetermined distance below the support plate. Including roads,
The seedling raising device. 2. The seedling raising device according to claim 1, wherein the mat-shaped seedling raising bed is a rollable long material. 3. The seedling raising device according to claim 1, wherein the mat-like seedling bed is a rice hull mat. 4. The mat-shaped nursery bed is made of pulp, peat moss,
2. A mat made of a vegetable material such as bark, rock wool, or a water-absorbing polymer.
A seedling raising device according to item 1. 5. The seedling raising apparatus according to claim 1, wherein the support plate is partitioned in accordance with the shape of the mat-shaped seedling raising bed. 6. The seedling raising device according to claim 1, wherein the support plate is a wooden plate. 7. The seedling raising device according to claim 1, wherein the support plate is a porous synthetic resin plate. 8. The seedling raising apparatus according to claim 1, wherein the flow path through which the water flows is of a vertical multi-stage type. 9. The seedling raising apparatus according to claim 1, wherein the refluxing water is hot water. 10. A method for hydroponically raising a plant, comprising placing a seed or a seedling on a mat-shaped seedling bed placed on a support plate, and keeping water at a predetermined distance below the support plate. The method for raising seedling, wherein the mat is maintained at a constant humidity on the mat-like seedling bed by refluxing. 11. The plant is a rice plant,
The method for raising seedlings according to claim 10. 12. The method for raising a seedling according to claim 10, wherein the mat-shaped raising bed is a rollable long material. 13. The method according to claim 10, wherein the refluxing water is warm water.