JPH11266725A - Water culturing device using water repellent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject device capable of increasing the content of a dissolvable oxygen in a nutrient solution by only impregnating a water repellent into the whole surface of a nutrient solution-containing case without employing any specific means. SOLUTION: This device comprises a case 2 designed to contain a nutrient solution and applicable to water culture, wherein the whole surface of the case 2 is coated with a water-repellent surface-improver (water repellent) 4 so that the content of a dissolvable oxygen in the nutrient solution is increased, and whereby an oxygen is supplied to the roots of plant 7 for accelerating the growth of the plant 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container used for hydroponic cultivation, and more specifically, to increase the dissolved oxygen concentration of a nutrient solution by infiltrating a water-repellent agent over the entire surface of the container, thereby supplying oxygen to the roots of the crop. The present invention relates to a hydroponic cultivation apparatus using a water repellent supplied to promote growth.

[0002]

2. Description of the Related Art The area of hydroponics in Japan is increasing year by year. The container used for the hydroponic cultivation and containing the nutrient solution is generally formed of concrete or plastic, and is provided with a waterproof treatment so that the nutrient solution does not leak outside during the cultivation.

On the other hand, when performing hydroponic cultivation, it is necessary to supply oxygen to the roots extending into the nutrient solution.
Several measures have been taken. For example, there are methods such as increasing the oxygen concentration in the nutrient solution using an air pump, and making the roots come into contact with air.

[0004]

However, in the above-mentioned conventional method, there are problems such as a complicated cultivation apparatus and a high cost.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and problems, and a special means can be obtained by simply infiltrating a water repellent in advance over the entire surface of a container containing a nutrient solution. It is an object of the present invention to provide a hydroponic cultivation apparatus using a water repellent capable of increasing the dissolved oxygen concentration in a nutrient solution without taking measures.

[0006]

In order to achieve the above object, the present invention relates to a container used for hydroponics and containing a nutrient solution, wherein a water repellent surface modifier (water repellent) is provided on the entire surface of the container. ), The dissolved oxygen concentration of the nutrient solution is increased, and oxygen is supplied to the roots of the crop to promote the growth of the crop.

[0007]

According to the hydroponic cultivation apparatus using the water repellent of the present invention by the above means, the entire container has water repellency by the water repellent penetrated into the entire surface of the container, and the entire container has an air layer. , Oxygen is easily dissolved in the nutrient solution, the dissolved oxygen concentration of the nutrient solution is increased, and oxygen is supplied to the roots of the crop to promote the growth of the crop, thereby improving the yield and quality of the crop.

[0008]

Embodiments of the present invention will be specifically described below with reference to the drawings and tables. FIG. 1 shows a hydroponic cultivation apparatus 1 for carrying out a hydroponic cultivation apparatus using a water repellent according to the present invention, and a container used for the hydroponic cultivation apparatus 1 is an unglazed pot 2 (similar to a flowerpot). a), a concrete or plastic bed 3 (b). The hole at the bottom of the clay pot 2 is closed with a silicone sealant. Concrete or plastic bed 3
Is a concrete or plastic plate assembled into a long cubic box with an open upper surface, and the inside of each corner is waterproofed.

A water-repellent surface modifier (water-repellent) 4 made of an organosilane compound is permeated over the entire surface of the unglazed pot 2 and the concrete bed 3. Then, a predetermined amount of the nutrient solution 5 is accommodated in the clay pot 2 and the concrete bed 3 or the plastic bed 3, and on the upper surface of the nutrient solution 5, a styrofoam plate 6 serving as a transplanting floor for the crop is floated. First, a crop 7 is planted and cultivated such that its roots are immersed in the nutrient solution 5 below.

(Experimental Example 1) Unglazed pot 2 (diameter 18c) which is a treatment section in which the water repellent 4 shown in FIG.
m) and two control specimens having the same appearance as the clay pot 2 with the bottom hole of the clay pot closed with a silicone sealant and the outer peripheral surface coated with a silicone sealant for waterproofing were used. The nutrient solution 5 contains OK-F1 (N: K: P = 15:
8:17) was used. Crop 7 was tested with spinach (cultivar = active), sown on a cell tray on September 12, 1997, and transplanted (planted) four strains on each styrene foam plate 6 on October 15. During the cultivation period, the temperature, the dissolved oxygen concentration (DO), the EC value and the pH of the nutrient solution 5 were measured. Table 1 shows the results of sampling crop 7 (spinach) on November 10 and examining the fresh weight and dry matter weight. FIG. 2 shows changes in the dissolved oxygen concentration of the nutrient solution 5 during the cultivation period.

[Table 1]

As apparent from FIG. 2, in the treated section in which the water repellent 4 was applied and infiltrated, the dissolved oxygen concentration was higher throughout the cultivation period than in the control section. The EC value, pH and water temperature did not differ significantly between the treated section and the control section. As is clear from Table 1, the fresh weight and the dry weight of the crop 7 (spinach) were larger in the water-repellent treatment than in the control.

(Experimental Example 2) A concrete bed 3 and a plastic bed 3 (900 × 400 × 250 mm each) which are treatment sections coated with a water repellent 4 shown in FIG.
One concrete bed and one plastic bed to which the water repellent 4 was not applied were used as a control and a control. Nutrient solution 5
Is OK-F1 (N: K: P = 15:
8:17) using a 1000-fold dilution, 2 per bed
40 g of coated fertilizer (N: K: P = 12: 10:
11) was applied. Crop 7 was tested with tomatoes (variety = Momotaro), sowed on a cell tray on September 12, 1997, and
Eight strains were transplanted (planted) to each Styrofoam plate 6 on October 23. The investigation items were the same as in Experimental Example 1. FIG. 3 shows changes in the dissolved oxygen concentration of the nutrient solution 5 during the cultivation period.

As apparent from FIG. 3, the dissolved oxygen concentration was higher throughout the cultivation period when the water-repellent treatment was performed as in Experimental Example 1 than in the control plot where the water-repellent treatment was not performed.

From the above results, it is possible to keep the dissolved oxygen concentration of the nutrient solution high by performing the water-repellent treatment on the entire surface of the hydroponic cultivation container. It is thought that it promoted.

[0015]

As described above, according to the hydroponic cultivation apparatus using the water repellent of the present invention, the water repellent is used for hydroponic cultivation and penetrates the entire surface of the container containing the nutrient solution. Since the concentration of dissolved oxygen in the nutrient solution is increased and oxygen is supplied to the roots of the crop to promote the growth of the crop, the entire vessel has water repellency due to the water repellent penetrated throughout the vessel. The whole container becomes an air layer, oxygen is easily dissolved in the nutrient solution, the dissolved oxygen concentration of the nutrient solution is increased, and oxygen is supplied to the roots of the crop to promote the growth of the crop and increase the crop yield. And quality can be improved. Therefore, it is not necessary to supply oxygen into the nutrient solution using other means during the hydroponic cultivation period only by allowing the water-repellent agent to penetrate the entire surface of the container, and no extra device or labor is required.

[Brief description of the drawings]

FIG. 1 shows a hydroponic cultivation apparatus for implementing a hydroponic cultivation apparatus using a water repellent according to the present invention, wherein (a) is a clay pot (used in Experimental Example 1) and (b) is concrete or plastic. It is a perspective view of a bed (used for Experimental example 2).

FIG. 2 is a graph showing a change in dissolved oxygen concentration of a nutrient solution during a cultivation period using a hydroponic cultivation apparatus (Experimental Example 1).

FIG. 3 is a graph showing a change in dissolved oxygen concentration of a nutrient solution during a cultivation period when a container of a hydroponic cultivation apparatus is changed (Experimental Example 2).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hydroponic cultivation apparatus 2 Unglazed pot (container) 3 Concrete or plastic bed (container) 4 Water repellent surface modifier (water repellent) 5 Nutrient solution 6 Styrofoam board (transplant floor) 7 Crops

Claims (1)

[Claims] 1. A container used for hydroponic cultivation and containing a nutrient solution, wherein a water-repellent surface modifier (water repellent) is penetrated into the entire surface of the container to increase the dissolved oxygen concentration of the nutrient solution. A hydroponic cultivation device using a water repellent, characterized in that oxygen is supplied to the roots of soybeans to promote the growth of crops.