JPH0430731A - Device for nutritive solution culture - Google Patents

Abstract

PURPOSE:To obtain the title device capable of uniformly supply a nutritive solution to plants and reducing the frequency of supplying the nutritive solution, by successively laying a water retention sheet and a root preventing sheet on the top of a slant bed equipped with a nutritive solution feeding member at the upper part and a drain channel at the lower part. CONSTITUTION:A water retention sheet 11 is laid on the top of a slant bed 6, then a root preventing sheet 12 is spread over the sheet 11, a nutritive solution feeding member 8 is arranged on the slope of the slant bed 6, and a drain channel 7 is set under the slant bed. Consequently, a nutritive solution sent from the nutritive solution feeding member 8 is retained in the water retention sheet 11, uniformly supplied to plants by capillary action of the sheet 11, and the nutritive solution more than water retention ability is dripped to the drain channel 7.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a hydroponic cultivation apparatus suitable for cultivating plants.

(Prior Art) As a conventional technology of a hydroponic cultivation bed having an inclined bed and a liquid supply means, for example, Utility Model Application No. 60-14996
There is an idea shown in Publication No. 2.

This invention is a long hydroponic cultivation bed formed so that a culture solution can be supplied onto the bed base member, which has an inclined surface in a direction substantially perpendicular to the longitudinal direction of the bed, and a bed base member having a plurality of concave ridges formed on its upper surface along the upper surface; a liquid supply means disposed above near the high edge of the bed base member; and a chemical liquid disposed below the low edge of the bed base member. The present invention provides a bed for aquaculture, which comprises: a water-permeable member placed on the upper surface of the bed base member that does not allow roots to penetrate; and a water-retaining medium placed on the water-permeable member. It is something to do.

(Problems to be Solved by the Invention) In the conventional hydroponic cultivation bed disclosed in the above-mentioned Japanese Utility Model Application Publication No. 60-149962, the retention of the culture solution on the bed surface is difficult.
However, due to the low capacity, there were problems such as the time required to supply the culture solution was relatively long, and the supply of the culture solution was uneven, that is, it was not possible to completely eliminate spots in the supply of the culture solution.

An object of the present invention is to provide a hydroponic cultivation device that solves the above problem U of the prior art.

(Means for Solving the Problems) In order to achieve the above object, the hydroponic cultivation apparatus of the present invention has an inclined bed, and a root prevention sheet is provided as an upper layer on the upper surface of the inclined bed. A water retaining sheet is spread as a lower layer, a nutrient solution supplying member is provided above the slope of the slope, and a drain groove is provided below the slope of the slope.

In the hydroponic cultivation apparatus of the present invention, an inclined bed having an inclination of about 1 to 3 degrees is usually provided.

The upper surface of the inclined bed is covered with a root prevention sheet as an upper layer and a water retaining sheet as a lower layer.

When placing a plant to be cultivated on a root prevention sheet, it is desirable to plant the plant seeds or seedlings on a water-retaining medium and then placing the water-retaining medium on it.As a water-retaining medium,
Generally, rock wool, urethane, charcoal, etc. are used. The water-retaining medium may be in the form of a block or a sheet.

Root prevention sheets are sheets that have water absorption properties and do not allow plant roots to penetrate.For example, root prevention water permeable sheets (product name, Toyobo Co., Ltd.), Luton (product name, Seiwa Chemical Co., Ltd.) By spreading a root-proofing sheet over a water-retaining sheet, the roots of cultivated plants are prevented from entering the water-retaining sheet.

The water retention sheet under the root prevention sheet retains the culture solution supplied from the nutrient solution supply member due to its water retention action, and supplies it to the plants. Examples of water-retaining sheets include non-woven fabrics,
Rock wool sheets, felt, urethane, etc. are used.

The nutrient solution supply member is installed above the slope of the slope bed, and the drain groove is installed below the slope of the slope bed.Normally, a pair of left and right slope beds is provided, and the center is lowered. A drain groove (1 piece) is provided, and nutrient solution supply members (2 pieces) are provided with both ends raised.

Alternatively, the center can be raised to provide a nutrient solution supply member (one), and both ends can be lowered to provide drain grooves (two).

As the nutrient solution supply member, for example, a tube having a large number of small holes around the circumference is used. The nutrient solution supply member is
If it is above the slope of a sloped bed, even on the root prevention sheet,
The nutrient solution supply member may be placed between the root prevention sheet and the water retention sheet, or under the water retention sheet, or may be placed in a well provided at the upper end of the inclined bed.

(Function) The culture solution supplied from the nutrient solution supply member is retained on the water retention sheet, and the culture solution exceeding the water retention capacity flows down to the drainage basin. The culture solution supplied from the nutrient solution supply member is spread evenly by the capillary action of the water retaining sheet, and there is no fear of uneven supply (that is, spots in the supply).

The amount of supply per unit time from the nutrient solution supply member is determined according to the size and density of the pores of the nutrient solution supply member. The water retention amount of a water retention sheet is generally adjusted by the thickness of the water retention sheet. By increasing the amount of culture solution supplied from the nutrient solution supply component and increasing the amount of culture solution that flows down to the drainage channel, the accumulated salts that remain unabsorbed by the plants will be washed away, resulting in good results for plant growth. bring about.

(Example) An example will be described with reference to the drawings. In FIGS. 1 and 2, 1 is a hydroponic cultivation apparatus of the present invention. 2 is a covering sheet that covers the hydroponic cultivation device 1;
A large number of openings 3 are provided in the covering sheet 2 at equal intervals. A culture medium block 5 in which plants 4 to be cultivated are planted can be inserted into the opening 3.

6 is a tilted bed, the tilt angle of which is 17°. The hydroponic cultivation device 1 has a pair of inclined beds 6 on the left and right, and a drain is provided below the slope of the inclined bed 6. II7 is provided. The drain groove 7 exists in the central longitudinal direction of the hydroponic cultivation device 1 . Nutrient solution supplying members 8 are provided at both ends of the pair of slanted beds 6.

As shown in FIG. 3, a waterproof sheet 9 is spread on the top surface of the inclined bed 6. A bridge 10 is placed on top of the drain groove 7. The bridge 10 is provided with a slit (not shown), and the culture solution flowing down on the bed 6 falls from the slit into the drainage basin 7.

A waterproof sheet 9 and a bridge 10 on a pair of inclined beds 6
A water-retaining sheet 11 is placed on top of the water-retaining sheet 1, and a root-prevention sheet 12 is also placed on top of the water-retaining sheet 1. A medium block 5 in which plants 4 are planted is placed on the root prevention sheet 12.

Reference numerals 13 and 14 are legs that support the inclined bed 6, and inside the center leg 14 there is a drain 7117.On the outside of the legs 13 on both sides, sheet presser levers 15 are provided. The end of the covering sheet 2 is inserted and the stopper 16
It is fixed at

Further, there is a support lid 17 under the covering sheet 2, and the supporting lid 17 is provided with openings 3- at positions corresponding to the openings 3 provided in the covering sheet 2.

Support parts 18 are provided at both ends of the inclined bed 6, and support parts 1
8 is provided with a recess 19. The ends of the water retaining sheet 11 and the root prevention sheet 12 are inserted into the recess 19, and the protrusions 20 provided on the lower sides of both sides of the support M17 are further inserted,
As a result, the water retaining sheet 11 is fixed at the same time as the support M17 is fixed.
and fix the ends of the root prevention sheet 12. Note that 21 is a pedestal on which the legs 13 and 14 are placed.

22 is a collection tank for the culture solution discharged from the drain groove 7. A drain pipe 23 is connected to the bottom of the drain 1ffi7, and the culture solution in the drain groove 7 is collected into the collection tank 22 through the drain pipe 23.The culture solution collected in the collection tank 22 is ,
The nutrient solution is pumped up into a liquid supply tank (not shown) by the pump 24, and then supplied again from the nutrient solution supply member 8.

In the hydroponic cultivation apparatus 1 of the present invention described above, the plants 4 planted in the culture medium block 5 utilize the culture solution supplied from the nutrient solution supply member 8.

The culture solution is supplied from the nutrient solution supply member 8 through the water retaining sheet 11
If the water-holding capacity is high, it is not necessary to feed frequently; on the other hand, if the water-holding capacity is low, the frequency of feeding must be increased accordingly.

It is desirable that the amount of culture solution supplied from the nutrient solution supply member 8 at one time exceeds the water retention capacity of the water retention sheet 11. 6 and falls into the drainage groove 7.

At this time, the accumulated salts that remained unabsorbed by the 8i material are washed away, resulting in good results for plant growth.

(Effects of the Invention) Since the present invention is configured as described above, it produces the effects described below.

Due to the capillary action of the water retaining sheet, the culture solution supplied from the nutrient solution supply member spreads uniformly and is supplied to the plants, resulting in uniform growth of the plants.

Depending on the water retention capacity of the water retention sheet, the number of times the culture solution is supplied from the nutrient solution supply member can be reduced.

By increasing the amount of culture solution supplied from the nutrient solution supply member at one time to an amount that exceeds the water retention capacity of the water retaining sheet, excess culture solution flows down on the bed and remains unabsorbed by the plants. The sc salts are washed away, giving good results to plant growth.

[Brief explanation of drawings]

FIG. 1 is a side sectional view taken along line A-A in FIG. FIG. 2 is an enlarged side cross-sectional view of the portion surrounded by line B in FIG. 1; l... Hydroponic cultivation device 6... #! Slanted bed 7 - Drainage groove 8 Nutrient solution supply member 1 Water retention sheet 2 Root prevention sheet

Claims (1)

[Claims] It has an inclined bed, and the upper surface of the inclined bed is covered with a root prevention sheet as an upper layer and a water retention sheet as a lower layer,
A hydroponic cultivation apparatus characterized in that a nutrient solution supply member is provided above the slope of the inclined bed, and a drain groove is provided below the slope of the inclined bed.