JPH0463525A - Plant culturing method and plant culturing device - Google Patents

Abstract

PURPOSE:To efficiently and surely rear a plant without requiring pH value control of a culture medium by blowing air having high carbon dioxide concentration into the culture medium. CONSTITUTION:A tube for blowing air in which small holes are bored in the interior of a culture tank is installed and carbon dioxide gas from carbon dioxide gas generator is mixed with air and the mixed gas is fed into the tube and blown into a culture medium in the culture tank.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention enables hydroponic cultivation of vegetables, flowers, grass, etc. without causing spoilage of the nutrient solution, and in addition, reducing the PI (value adjustment is not required) of the nutrient solution. The present invention relates to a plant cultivation method and a cultivation device that allow plants to grow very effectively without having to grow.

<Prior art> Hydroponic cultivation for growing plants without using soil and sunlight includes, for example, Japanese Patent Laid-Open No. 63-2 developed by the present applicant.
A structure described in Japanese Patent No. 40731 is known.

The above-mentioned conventional invention uses a fluorescent lamp as a light source for hydroponic cultivation, and it is as light as a fluorescent lamp! The lamp is moved as the plant grows to maintain the distance between the upper end of the plant and the fluorescent light within a predetermined range, and if necessary, the carbon dioxide in the cultivation room can be adjusted to 500 ppm. As mentioned above, the content is preferably maintained at 1,000-5,000 ppm.

<Problems to be Solved by the Invention> However, in the conventional cultivation methods and cultivation devices described above, the nutrient solution in the cultivation tank contains a large amount of plant roots, fallen leaf debris, and other fine organic matter. When the nutrient solution reaches a temperature of about 20° C. or higher, these organic substances are likely to rot, and the pH value fluctuates greatly, causing a significant adverse effect on plant growth.

In hydroponic cultivation, plants grow by absorbing nutrients from the nutrient solution through their roots, so if you use rotten nutrient solution or a nutrient solution with an inappropriate pH value, the plants will not grow (or will not grow). This would cause the plants to wither and also worsen the atmosphere within the cultivation room.Therefore, there was a need for a cultivation method and device that would significantly facilitate the management of the nutrient solution, such as preventing the nutrient solution from rotting and ensuring stability due to no need to adjust the PH of the nutrient solution.

<Means for Solving the Problems> The present invention has been proposed in view of the above, and in particular, involves soaking the roots of plants in a nutrient solution containing fertilizer components and irradiating the plants with light to grow the plants. The plant cultivation method and apparatus are characterized in that air with a high carbon dioxide concentration is blown into the nutrient solution.

<Effect> 500 ppm or more, preferably 1,000 to 5.0 ppm in the nutrient solution.
By blowing air with a carbon dioxide concentration of about ooppm, the pH value of the nutrient solution becomes stable, and there are very few fluctuations in the pH value that inhibit plant growth. In addition, blowing air with high carbon dioxide concentration into the nutrient solution reliably prevents the decay of organic matter present in the nutrient solution and the decay of the nutrient solution, and does not affect plant growth. The purpose of the present invention is to provide a cultivation method or a cultivation device that is extremely easy to maintain and manage, and that allows plants to grow reliably.

(Example) The present invention will be described in detail below based on an example of the drawings.

FIG. 1 shows an embodiment of the plant cultivation apparatus 1 of the present invention, which includes an upper part 2, a lower part 3, and a side part 4.
A cultivation space 7 surrounded by a glass frame 6 is formed inside a frame 5 having a square shape, and two upper and lower shelves 8 are provided inside the cultivation space 7 to form three cultivation rooms 9 and 9 above. ..., and a cultivation tank 10 is installed at the bottom of each cultivation chamber 9.

The above-mentioned cultivation tank 10 has a rectangular dish frame shape and has an air blowing tube 11 with a large number of small holes located therein, and a nutrient solution is supplied to the inside to enable hydroponic cultivation of plants. . One end of each of the air blowing tubes 11 described above is connected to an air supply tube 14 extending from a pump 13 facing the carbon dioxide gas generation device 12 provided inside the upper portion 2, for example. [12] The air containing a large amount of carbon dioxide generated in step 12 is guided from the air supply tube 14 to each air blowing tube 11, and is fed to each cultivation tank 10.
It is blown into the nutrient solution.

The above-mentioned carbon dioxide gas generating device 12 is a catalytic combustion device that burns benzine or other fuel using platinum as a combustion catalyst, and can burn fuel in a constant state at all times, and carbon dioxide gas is generated by combustion. That's what I do. Then, the pump 13 pumps air with a high carbon dioxide concentration generated by the operation of the carbon dioxide gas generating device 12 to the air supply tube 14, and this air is supplied to each air blowing tube 11 and blown out from the small hole, causing bubbles to be generated. This is blown into the nutrient solution in the cultivation tank 10.

However, the carbon dioxide gas generator 12 is installed in the cultivation space 7 to increase the carbon dioxide concentration of the air in the cultivation space 7, and the pump 13 sucks this air and supplies it to the air supply tube 14, and each air blowing It may also be blown into the nutrient solution in the cultivation tank 10 through the feeding tube 14.

A water circulation pump 15 is installed inside the lower part 3 of the frame frame 5, and a nutrient solution supply pipe 16 extending from the outlet side of the water circulation pump 15 faces the inside of the top cultivation tank 10.
The top cultivation tank 10 and the second cultivation tank 10 from the bottom, and the second cultivation tank 10 from the bottom and the bottom cultivation tank 10 are connected by communication vibrators 17, respectively, and the bottom cultivation tank 10
and the inlet side of the water circulation pump] 5 are connected by a reflux pipe 18. Therefore, when the water circulation pump 15 is driven, the nutrient solution in the bottom cultivation tank 10 is sucked into the reflux pipe 18 and sent under pressure to the nutrient solution supply pipe 16, and is then supplied to the top cultivation tank 10 and connected to the upper communication vibrator 17. The circulating flow is supplied from the central cultivation tank 10 to the cultivation tank 10 at the bottom, and is further guided from the central cultivation tank 10 to the lowest cultivation tank 10 by the lower communication vibrator 17. In addition, it is preferable to provide a filter or the like at the nutrient solution suction port of each communication vibrator 17 and reflux pipe 18 to prevent fine organic and inorganic components mixed into the nutrient solution from clogging each pipe or flowing into the water circulation pump 15.

Inside each cultivation room 9, a fluorescent lamp 19 whose height can be adjusted by hanging it with a chain, for example, is provided as a light source for the plants to be cultivated. Set 20! An air conditioning vibrator 21 piped to the side part 4 is connected to an air blowing part 22 provided in the upper part 2, and the temperature inside the cultivation space 7 is maintained within a certain range.

The plant cultivation device 1 of the present invention has the above-described configuration, and when cultivating plants, a nutrient solution containing fertilizer components is supplied to each cultivation tank 10, and the roots of plants such as vegetables, flowers, and grass are placed in the cultivation tank 10. The air conditioning mechanism 20 is operated to maintain the inside of the cultivation space 7 at a constant temperature, and the water circulation pump 15 is driven to circulate the nutrient solution in each cultivation tank 10 as described above. Carbon dioxide gas is generated by a gas generator 12, and air with a high carbon dioxide concentration is blown into the nutrient solution in each cultivation tank 10 from each air blowing tube 11 by driving a pump 13.

In this case, the carbon dioxide concentration of the air blown into the nutrient solution inside the cultivation tank 10 is 500 ppm or more, preferably 1.00 ppm or more.
0-5. Approximately OOOppm is preferable.

Note that inside the cultivation space 7, the temperature, carbon dioxide concentration, and light irradiation state by the fluorescent lamp 19 are controlled.

When air with a high carbon dioxide concentration is blown into the nutrient solution as described above, the organic matter contained within the nutrient solution becomes extremely difficult to decompose, and since the nutrient solution itself does not decompose, it has a negative impact on plant growth. Because there are no plants, the plants grow actively. Moreover, oxygen assimilation in plants becomes active, greatly contributing to growth.

Note that if the carbon dioxide concentration of the air blown into the nutrient solution in the cultivation tank 10 is less than 500 ppm, little effect on preventing spoilage of the nutrient solution can be expected, and if it is more than 5,000 ppm, the carbon dioxide concentration will be too high and the Pl value will be low. and inorganic fertilizer components contained in the nutrient solution may precipitate.
Approximately 0 to 5.0OOppL11 is preferable.

Although the present invention has been described above based on the embodiments, the present invention is not limited to the above-described embodiments, and can be implemented in any manner as long as the structure described in the claims is not changed.

For example, the carbon dioxide generator may be a carbon dioxide gas cylinder that does not use fuel combustion, such as benzene, or if air with a high carbon dioxide concentration is blown into the nutrient solution, a nozzle or other configuration may be used instead of a porous tube. May be adopted. Further, the inside of the cultivation space 7 may have any configuration.

<Effects of the Invention> In summary, according to the present invention, in a plant cultivation method or cultivation device in which the roots of a plant are immersed in a nutrient solution containing a fertilizer component and the plant is grown by irradiating the plant with light, The nutrient solution is characterized in that air with a high carbon dioxide concentration is blown into the nutrient solution, so even if minute organic matter is present in the nutrient solution, it will not decompose and will not affect the growth of plants. Since the nutrient solution can be used for a long period of time, it is stable and maintenance is extremely easy. In addition, it is possible to grow plants while maintaining a certain range of PI (PI) without adjusting the pH of the nutrient solution, so it can be used especially as a hydroponic cultivation device at home, making it very practical. Becomes something of high value.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway schematic front view showing one embodiment of the present invention. 1 is a plant cultivation device, 5 is a frame, 6 is a glass frame, 7
1 is a cultivation space, 9 is a cultivation room, 10 is a cultivation tank, 11 is an air blowing tube, and 12 is a carbon dioxide generator.

Claims (1)

[Scope of Claims] 1. A method for cultivating plants in which the roots of plants are immersed in a nutrient solution containing fertilizer components and the plants are grown by irradiating the plants with light, wherein the nutrient solution has a carbon dioxide gas concentration. A method of cultivating plants characterized by blowing in high-quality air. 2. A plant cultivation device characterized in that the cultivation chamber has a cultivation tank in which the roots of the plants are immersed, and a nutrient solution into which air with a high carbon dioxide concentration is blown is supplied to the cultivation tank. .