JPS6216611B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hydroponic cultivation method for plants and an apparatus for carrying out the method.

In general, maximizing the growth potential of cultivated plants is a very important issue in terms of harvest. As a means of achieving this problem, the present inventor has discovered that in a hydroponic cultivation method, it is important to have a nutrient solution supply means that increases the nutrient solution flow rate and decreases the nutrient solution water level as the cultivated plants grow. has already been made clear.

By employing this nutrient solution supply means, results were obtained in which the biomass of cultivated plants per unit period was significantly increased compared to the conventional method.

By the way, in general, in hydroponic cultivation, the underground parts of the cultivated plants, that is, the roots of the plants, are extremely developed, which may lead to overcrowding of the roots.

However, in order to secure a sufficient area to accommodate the increase in the area occupied by the roots, the only option is to increase the site area, which causes disadvantages in terms of land use and makes it difficult to use the above-mentioned excellent cultivation methods. It also became a problem in terms of recruitment.

The present invention provides a method and apparatus for hydroponic cultivation in order to eliminate such inconveniences, to enable hydroponic cultivation in as small a site area as possible, and in turn to enable adoption of the above-mentioned excellent nutrient solution supply means. I will provide a.

The basic idea of the present invention is to have a site area where the above-ground parts of cultivated plants can grow well, allow sufficient root development within the site area, and cultivate plants through extensive root elongation. The purpose is to provide a place for roots to grow so that the tank is not overcrowded and can be supplied with sufficient nutrients.

To explain the embodiment, 1 is a frame body, and the frame body 1 can be assembled into an appropriate size depending on the size of the cultivation tank, etc. 2
is a slide support stand provided on the frame body 1, and the slide support stands 2 are arranged in several sets in the vertical direction on both sides of the frame body 1.
Each is fixed so that it can move up and down. The means for vertically moving the slide support base 2 may be manually operated or various known means may be employed. Reference numeral 3 denotes a cultivation tank, which is placed on the slide support 2 and arranged vertically in several stages so as to be tiltable by the slide support 2. Reference numeral 4 denotes a drain tube, which is attached to the bottom of the cultivation tank 3 so as to be slidable in the vertical direction, so that the water level can be adjusted. The lower end of this drain tube 4 opens into the lower cultivation tank 3, and also serves as a supply port for the nutrient solution to the lower cultivation tank 3. Further, the drain tube 4 is formed to have a large inner diameter in order to sufficiently allow the roots of cultivated plants to penetrate and maintain sufficient draining capacity. 5 is a nutrient solution supply port. Although the liquid supply port 5 faces the cultivation tank 3 on the uppermost stage, it is also good to provide the auxiliary liquid supply port 5a on the cultivation tank 3 on the lower stage. The drained liquid from the cultivation tank 3 at the lowest stage is recycled to the liquid supply port 5 after its nutrients are renewed. Numeral 6 is a cultivation pot, which is provided only in the largest cultivation tank 3. 7 is a cultivated plant, and the roots 8 of the cultivated plant 7 spread from the pot 6 to the cultivation tank 3 as it grows.

Next, to explain the present invention according to the growth of cultivated plants, first, cultivated plants 7 are placed in the pot 6 of the cultivation tank 3 at the top.
Plant seeds or seedlings. and cultivated plants 7
As the roots 8 grow, the amount of nutrient solution supplied from the solution supply port 5 is gradually increased, and the cultivation tank 3 is tilted from the solution supply port 5 side to the drain tube 4 side to increase the nutrient solution flow rate. Then, the drain tube 4 is lowered to gradually reduce the water level. On the other hand, a part of the elongated root 8 is in the drain tube 4.
However, the inside of the drain tube 4 is a very favorable environment for the roots to absorb nutrients due to an increase in the flow rate of the nutrient solution, etc., and as a result, the roots 8 develop very well. Therefore, the roots 8 in the drain tube 4 further extend and reach the lower cultivation tank 3. On the other hand, this means that until the roots 8 reach the lower cultivation tank 3, the lower cultivation tank 3 can be used for another short-term cultivation by shifting its position. The roots 8 that have reached the lower cultivation tank 3 can freely grow in a new location. The lower cultivation tank 3 where the roots 8 have reached is gradually tilted toward the drain tube 4 side as the roots 8 develop, and at the same time the drain tube 4 is lowered to reduce the nutrient solution water level. Furthermore, if necessary, the nutrient solution may also be supplied from the auxiliary liquid supply port 5a to increase the flow rate or add nutrients. The elongated roots 8 gradually spread to the lower cultivation tank 3. In addition, the drain tube 4 can be provided not only at the side of the bottom of the cultivation tank 3 as shown in the figure, but also at the center of the bottom.

As described above, in the method of the present invention, in hydroponic cultivation, a cultivated plant is planted in the uppermost cultivation tank of cultivation tanks arranged in multiple stages in the vertical direction, and the roots of the cultivated plant are sequentially guided to the lower cultivation tanks through the drainage pipe. This not only allows the above-ground parts to receive sufficient sunlight, but also allows the roots to fully elongate and reproduce without becoming overcrowded, and to absorb sufficient nutrients, allowing the best cultivation conditions to be maintained using hydroponic cultivation. At the same time, the cultivation site area can be reduced and used very effectively. In addition, the present invention provides a hydroponic cultivation apparatus in which the hydroponic cultivation tanks are arranged in multiple stages in the vertical direction, and the hydroponic cultivation tanks are arranged in multi-stage in the vertical direction, and the cultivation tank in the top stage plants cultivated plants. The lower cultivation tanks, excluding the top one, are considered cultivation tanks.
The cultivation tank is used to extend the roots of the plants planted on the top tier, and each cultivation tank is equipped with a drainage tube that opens into the lower cultivation tank. Since it is formed to have a diameter sufficient to flow down into the tank and guide the roots of plants planted in the uppermost layer to the lower layer, it is possible to implement the method of the present invention,
Effective utilization of cultivation site area and good yields can be achieved.

[Brief explanation of the drawing]

The figure is a longitudinal sectional view showing an example. 1... Frame body, 2... Slide support stand, 3... Cultivation tank,
4...Drain tube, 5...Liquid supply port, 6...Pot, 7...Cultivated plant, 8...Root.

Claims (1)

[Scope of Claims] 1. A cultivated plant is planted in the topmost cultivation tank of cultivation tanks arranged in multiple stages in the vertical direction, and the roots of the cultivated plant extending into the drainage tube are cultivated in order from the drainage tube downward. A hydroponic cultivation method characterized by introducing water into a tank. 2. The hydroponic cultivation method according to claim 1, in which the flow rate of the nutrient solution in the cultivation tank is increased and the water level of the nutrient solution is decreased as the plants grow. 3 Hydroponic cultivation tanks are arranged in multiple tiers in the vertical direction, and the top tier cultivation tank is used as the cultivation tank for planting cultivated plants, and the lower tier cultivation tanks other than the top tier are used to grow the roots of the plants planted in the top tier. Each cultivation tank is equipped with a drain tube that opens into the lower cultivation tank. A hydroponic cultivation device characterized by being formed to be thick enough to guide the roots of plants grown in the soil to the lower stage.