JP2012055171A - Plant cultivation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simplified plant cultivation system effectively exterminating germs in the air and germs and/or insects invading into plants, and also promoting the growth of the plants.SOLUTION: The plant cultivation system effectively performs extermination of pests present in the air or invading into the plants by simultaneously releasing ozone gas and spraying ozone water in a plant cultivation chamber. In the system, nonconventional high-concentration oxygen water is generated from the ozone water, the high-concentration oxygen water is watered to promote remarkable growth of the plants, and also formulation of the system for generating the ozone water and the high-concentration oxygen water from the ozone gas results in attaining simplification of the system.

Description

  The present invention includes a cultivation room that forms a closed space for cultivating plants, an ozone gas generation device that generates ozone gas, and an ozone gas emission device that releases ozone gas generated by the ozone gas generation device into a closed space in the cultivation room. It is related with a plant cultivation system provided with.

  In recent years, with the development of institutional horticulture, the cultivation of vegetables, fruits, flower buds, fungi and the like has come to occupy a large proportion of greenhouse cultivation and institutional cultivation. However, vegetables, fruits, flower buds, fungi, etc. are vulnerable to diseases and pests and are cultivated using many pesticides.

  In order to use a large amount of agricultural chemicals, various health damages caused by spraying agricultural chemicals and various damages caused by eating vegetables and fruits contaminated with a large amount of agricultural chemicals have been reported. In addition, pesticides are expensive and are a great economic burden for farmers who grow plants. Therefore, there is a demand for a method for cultivating plants without pesticides.

  Furthermore, in greenhouses and greenhouse cultivation, flowers, vegetables and fruits are harvested many times within a year and shipped to the market. This is effective for promoting plant growth within a short period of time. There is a need for a method.

  As a method for cultivating plants without using pesticides, a method has been proposed in which ozone gas is injected into a horticultural facility to eliminate pathogenic bacteria (Patent Document 1). In addition, a method for controlling soil-habiting pests by irrigating the soil with ozone water or the like has been proposed (Patent Document 2).

  In the field of promoting plant growth, a method of promoting plant growth using ozone gas (Patent Document 3), ozone gas or oxygen is dissolved in water to generate oxygen water, and oxygen water is supplied to the plant. There are proposed a method for promoting plant growth (Patent Document 4) and a method for generating oxygen water by dissolving oxygen or air in water (Patent Document 5).

Japanese Patent Laid-Open No. 3-219808 Japanese Patent Laid-Open No. 9-30912 Japanese Patent Laid-Open No. 2001-320962 JP 2001-21770 A JP 2006-304714 A

  In the method described in Patent Document 1, the method for adjusting the temperature and humidity in the horticultural facility according to the occurrence of pathogenic bacteria is complicated. In addition, since high-concentration ozone gas is harmful to plants, it is decided to use low-concentration ozone gas. However, it is very difficult to distribute low-concentration ozone gas to every corner of a horticultural facility. As a result, a location where the ozone concentration becomes very low is generated. If it does so, a pathogenic microbe cannot be disinfected effectively, but there exists a problem of causing a plant disease.

  In addition, the method described in Patent Document 2 has a problem that it cannot prevent the occurrence of diseases caused by pathogenic bacteria in the air because it has almost no bactericidal effect against pathogenic bacteria in the air.

  In the method described in Patent Document 3, as described in Patent Document 1, when ozone gas directly falls on a plant, there is a problem that phytotoxicity such as small spots and yellow spots occurs on the leaf surface. Further, it is difficult to control low-density ozone gas throughout the horticultural facility because it requires fairly strict ozone concentration management.

  In the method described in Patent Document 4, the structure of the entire apparatus is complicated, and the concentration of oxygen water discharged from the pressurized mixing tank is as low as about 10 ppm, which is insufficient to promote plant growth. There's a problem. In addition, it is described that ozone water in which ozone gas is dissolved in water is efficiently absorbed by plants, but there is a problem that ozone gas is generated when ozone water is irrigated as it is, and the leaves and roots of plants are adversely affected. .

  In the method described in Patent Document 5, the dissolved oxygen concentration is as low as 10 to 16 ppm, and there is a problem that plants cannot be grown sufficiently.

  An object of the present invention is to effectively eliminate pathogenic bacteria and pests that have invaded plants in the air and promote plant growth. Moreover, it aims at providing the simplified plant cultivation system.

In order to achieve the above object, the plant cultivation system according to the present invention comprises:
A cultivation room forming a closed space for cultivating plants;
An ozone gas generator for generating ozone gas;
In a plant cultivation system provided with an ozone gas discharge device which discharges ozone gas generated by the ozone gas generator into a closed space in the cultivation room,
An ozone water generator for dissolving ozone gas in water to generate ozone water;
An ozone water spraying device for spraying ozone water generated by the ozone water generating device onto the plants in the cultivation room;
An oxygen water generator for decomposing ozone in the ozone water to generate oxygen water;
An oxygen water irrigation device that irrigates oxygen water produced by the oxygen water production device to the cultivation floor of the plant in the cultivation room;
The ozone water generating device generates ozone water having an ozone concentration higher than that of the ozone gas.

  Moreover, in the said plant cultivation system, the ozone concentration of the said ozone gas is 0.01 ppm or more and 0.1 ppm or less.

  Furthermore, in the said plant cultivation system, the ozone concentration in the ozone water produced | generated by the said ozone water production | generation apparatus is 1 ppm or more and 7 ppm or less.

  Furthermore, in the said plant cultivation system, the spray nozzle of the said ozone water spraying apparatus is provided in the range of 0.5 m or more and 5 m or less from the said plant.

  Furthermore, in the said plant cultivation system, the oxygen concentration in the said oxygen water is 20 ppm or more and 60 ppm or less.

  According to the present invention, it is possible to effectively prevent damage caused by diseases and pests by using ozone gas and ozone water spray having a higher ozone concentration than that of the ozone gas, and by irrigating oxygen water to produce a plant. Can be promoted.

  Moreover, a plant cultivation system can be simplified by producing | generating ozone water and oxygen water from ozone gas.

  Below, embodiment of the plant cultivation system in the present invention is described in detail based on a drawing.

  FIG. 1 shows an overall view of a plant cultivation system 1 to which the present invention is applied. As shown in FIG. 1, the plant cultivation system 1 of the present embodiment includes a cultivation room 10 that forms a closed space for cultivating a plant 56, an ozone gas generator 12 that generates ozone gas, and ozone gas in the cultivation room 10. An ozone gas release device 14 that discharges into a closed space, an ozone water generation device 16 that dissolves ozone gas in water to generate ozone water, an ozone water spray device 18 that sprays ozone water onto the plants 56 in the cultivation room 10, and An oxygen water generating apparatus 20 that decomposes ozone in ozone water to generate oxygen water and an oxygen water irrigation apparatus 22 that irrigates oxygen water to the cultivation floor 58 of the plant 56 in the cultivation room 10 are provided.

  The ozone gas generator 12 is connected to the ozone gas discharge device 14 and the ozone water generator 16, and the ozone water generator 16 is connected to the ozone water spray device 18 and the oxygen water generator 20 to generate oxygen water. The device 20 is connected to an oxygen water irrigation device 22.

  FIG. 2 shows an external view of the cultivation room 10 of the plant cultivation system 1. In the plant cultivation system 1, examples of the cultivation room 10 that forms a closed space for cultivating the plant 56 include a vinyl house, a glass greenhouse, and an indoor garden facility. In FIG. 1, the ozone gas generator 12, the ozone water generator 16, and the oxygen water generator 20 are installed in the cultivation room 10, but may be installed outside the cultivation room 10.

  FIG. 3 shows the configuration of the ozone gas generator 12. As shown in FIG. 3, the ozone gas generator 12 includes a compressor 24, a dehumidifier 26 to which air compressed from the compressor 24 is sent, an adsorption tower 28 to which air dehumidified by the dehumidifier 26 is sent, and an adsorption tower. And an ozonizer 30 to which the air treated at 28 is sent.

  FIG. 4 shows the ozone gas releasing device 14. As shown in FIG. 4, the ozone gas release device 14 includes a pipe 34 disposed above the plant 56, a plurality of ozone gas discharge nozzles 36 that are attached at predetermined intervals to the pipe 34 and release ozone gas, A valve 32 provided between the ozone gas generator 12 and the pipe 34 for introducing or stopping ozone gas into the pipe 34 and an ozone gas concentration detector 38 provided at a predetermined position in the cultivation room 10 are provided. Yes. In FIG. 4, the pipe 34 has a circular shape, but can take various forms to release ozone gas.

  FIG. 5 shows the ozone water generator 16. As shown in FIG. 5, the ozone water generator 16 includes an ejector 40 connected to the ozone gas generator 12 and a pump 48, a mixing device 42 to which a gas-liquid mixture mixed in the ejector 40 is sent, and a mixing The ozone water storage tank 44 to which the ozone water generated by the apparatus 42 is sent, the ozone concentration detector 46 provided in the ozone water storage tank 44 for measuring the ozone concentration in the ozone water, and the ozone water ejector from the ozone water storage tank 44. A pump 48 for returning to 40 and a water supply pipe 49 for supplying water to the ozone water storage tank 44 are provided. Here, the ozone concentration detector 46 may be attached to the ozone water storage tank 44 or may be attached on a circulation line between the ozone water storage tank 44 and the ejector 40.

  FIG. 6 shows an ozone water spray device 18. As shown in FIG. 6, the ozone water spray device 18 includes a pipe 52 disposed in the vicinity of the plant, and a plurality of ozone water spray nozzles 54 that spray ozone water attached at predetermined intervals to a predetermined position of the pipe 52. And a pump 50 that is provided between the ozone water storage tank 44 and the pipe 52 and feeds ozone water from the ozone water storage tank 44 to the pipe 54. Here, the ozone water spray nozzle 54 can be disposed at various locations such as the upper side, the side surface, and the lower side of the plant 56, and is installed within a range of 0.5 m to 5 m from the plant 56.

  FIG. 7 shows the oxygen water generator 20. As shown in FIG. 7, the oxygen water generation device 20 decomposes ozone in the ozone water sent from the ozone water storage tank 44 and stores it as oxygen water and ozone water storage tank 44 from the ozone water storage tank 44. A pump 62 for sending water to the oxygen water storage tank 60; an oxygen concentration detector 64 attached to the oxygen water storage tank 60; and a pump 66 for returning oxygen water from the oxygen water storage tank 60 to the ozone storage tank 44. Is provided. Further, a water level sensor (not shown) is provided in the oxygen water storage tank 60. Furthermore, the oxygen water storage tank 60 may be provided with a stirring device for promoting the decomposition of ozone water.

  As shown in FIG. 8, the oxygen water irrigation apparatus 22 includes a pump 70 for feeding oxygen water from the oxygen water storage tank 60, a pipe 72 connected to the pump 70 for sending oxygen water to the cultivation floor 58, and a pipe 72 and an infusion tube 74 provided near the root of the plant 56 on the cultivation floor 58. The drip tube 74 may be embedded in the cultivation floor 58.

  The operation of the plant cultivation system configured as described above will be described below.

  First, ozone gas is generated in the ozone gas generator 12 shown in FIG. Specifically, when the ozone gas generator 12 is turned on and the compressor 24 is driven, the compressor 24 takes in the air and supplies the compressed air to the dehumidifier 26. The dehumidifier 26 removes moisture from the supplied air and sends it to the adsorption tower 28 as dry air. The adsorption tower 28 adsorbs nitrogen in the supplied dry air and supplies it to the ozonizer 30 with an oxygen concentration of 90% or more. Then, a high voltage is applied by the ozonizer 30 to generate ozone gas.

  Next, in the ozone gas release device 14 shown in FIG. 4, the ozone gas generated by the ozone gas generation device 12 passes through the pipe 34 via the valve 32 and is released from the ozone gas discharge nozzle 36 into the cultivation room 10. The ozone gas is released by opening the valve 32 at a predetermined time by a timer (not shown) in the ozone gas releasing device 14 and guiding the ozone gas to the pipe 34. When the valve 32 is opened, ozone gas passes from the ozone gas generator 12 through the pipe 34 and is released into the cultivation room 10 from the hole at the tip of the ozone gas discharge nozzle 36 attached to the pipe 34. At this time, several ozone gas concentration detectors 38 are installed in the cultivation room 10 and the valve 32 is closed when the ozone gas concentration reaches a predetermined concentration.

  Here, ozone gas is toxic at a high concentration, and if it falls directly on the plant 56, it is not preferable because phytotoxicity such as small spots or yellow spots occurs on the leaf surface of that portion. Therefore, the ozone gas discharge nozzle 36 provided in the ozone gas discharge device 14 is preferably installed in a range of 0.5 m or more and 5 m or less from the plant 56 in order to prevent the ozone gas from directly falling on the plant 56. Further, the ozone gas discharge nozzle 36 can release the ozone gas in the horizontal direction so that the ozone gas does not directly fall on the plant 56 by opening a hole for discharging the gas in the horizontal direction.

  Furthermore, in the ozone gas release device 14, the ozone gas concentration released in the cultivation room 10 is adjusted to a concentration of 0.01 ppm or more and 0.1 ppm or less. If the concentration is less than 0.01 ppm, the phytopathogenic bacteria cannot be effectively sterilized, and the plant 56 is damaged by the disease. Further, ozone gas has a pest repellent effect and prevents the pest from entering the inside of the cultivation room 10, but a pest repellent effect is not sufficiently obtained at a concentration of less than 0.01 ppm. On the other hand, when the concentration of ozone gas exceeds 0.1 ppm, phytotoxicity to the plant 56 is likely to appear, which is not preferable because it also has an adverse effect on workers.

  Next, in the ozone water generating device 16 shown in FIG. 5, water is sent from the water supply pipe 49 to the ozone water storage tank 44, and a predetermined amount of water is stored in the ozone water storage tank 44. Here, as the water sent from the water pipe 49 to the ozone water storage tank 44, various kinds of water such as tap water, well water, reclaimed water, and rain water can be used. Thereafter, ozone gas is sent from the ozone gas generator 12 to one inlet of the ejector 40. At the same time, the pump 48 is driven to feed the water stored in the ozone water storage tank 44 from the inlet in the other direction of the ejector 40, and ozone gas and water are mixed in the ejector 40. The mixed ozone gas and water are sent from the outlet of the ejector 40 into the mixing device 42, and the ozone gas is dissolved in water to generate ozone water having a higher concentration, which is sent to the ozone water storage tank 44.

  In the ozone water generator 16, an ozone concentration detector 46 is attached, and the ozone concentration of the ozone water is measured by the ozone concentration detector 46. Until the ozone concentration in the ozone water reaches a predetermined concentration, the ozone water stored in the ozone water storage tank 44 is sent to the ejector 40 via the pump 48 and further mixed with ozone gas, and then the mixing device 42 is used. Then, the ozone water is again stored in the ozone water storage tank 44. The ozone water generator 16 generates ozone water of 1 ppm to 7 ppm by repeating this circulation.

  The ozone concentration in the ozone water generated by the ozone water generator 16 is preferably 1 ppm or more and 7 ppm or less. When the ozone concentration is less than 1 ppm, the disease prevention effect and the pest repellent effect on the plant 56 become low. Moreover, when the ozone concentration exceeds 7 ppm, high concentration ozone gas is generated when ozone water is sprayed on the plant 56, which is not preferable because it causes phytotoxicity to the plant.

  Next, in the ozone water spraying device 18 shown in FIG. 6, the ozone water spraying is performed by driving the pump 50 at a predetermined time by a timer (not shown). The ozone water is introduced from the ozone water storage tank 44 into the pipe 52 via the pump 50 and sprayed onto the plant 56 from the tip of the ozone water spray nozzle 54 attached to the pipe 52. The spraying time is adjusted between several minutes to several tens of minutes so that the ozone water is sufficiently distributed to the plant 56.

  Although ozone gas is generated when ozone water is sprayed, ozone water spray nozzle 54 is provided within a range of 0.5 m to 5 m from plant 56 because ozone gas of high concentration is harmful to plant 56. . If the ozone water spray nozzle 54 is installed less than 0.5 m from the plant 56, the plant 56 is likely to cause phytotoxicity due to the ozone gas generated when the ozone water is sprayed. Further, if the ozone water spray nozzle 54 is installed over 5 m from the plant 56, the sprayed ozone water is not easily applied to the plant 56, and the effect of the ozone water spray is reduced, which is not preferable.

  In the ozone water spray device 18, the ozone water spray nozzle 54 may have any shape as long as ozone water can be sprayed in the form of a mist, but in order to spray ozone water evenly on the cooling effect by the heat of vaporization and the plants 56, it is preferable A shape having a size capable of spraying fine mist having a size smaller than 200 microns is preferable.

    As described above, a high ozone gas concentration is not preferable because phytotoxicity occurs in plants and the human body is also adversely affected. Therefore, it is preferable to adjust the ozone concentration near the plant 56 in the cultivation room 10 to 0.01 ppm or more and 0.1 ppm or less. In this case, the ozone gas concentration generated by the ozone gas generator 12 is preferably less than 1 ppm. When ozone gas having a concentration higher than 1 ppm is released in the cultivation room 10, the ozone concentration in the vicinity of the plant 56 is not attenuated to 0.1 ppm or less, and chemical damage due to ozone gas is likely to occur. In addition, when releasing ozone gas of 1 ppm or more into the cultivation room 10, it is necessary to sufficiently circulate the air in the cultivation room 10 by keeping the ozone gas discharge nozzle 36 sufficiently away from the plant 56. On the other hand, the ozone concentration of the ozone water generated by the ozone water generator 16 needs to be 1 ppm or more. Ozone in ozone water is less toxic than ozone gas, and even if ozone water with a concentration of 1 ppm or more falls on plants, no phytotoxicity is generated, and pathogens and pests can be controlled. That is, by using ozone gas and ozone water having a concentration higher than that of ozone gas, it is possible to effectively prevent diseases and damage during harm without causing phytotoxicity to the plant 56.

  Next, in the oxygen water generation apparatus 20 shown in FIG. 7, when the oxygen water level in the oxygen water storage tank 60 reaches a predetermined level by a water level sensor provided in the oxygen water storage tank 60 (not shown), control (not shown) is performed. The apparatus drives the pump 62 to feed ozone water from the ozone water storage tank 44 to the oxygen water storage tank 60. Thereafter, the ozone water stored in the oxygen water storage tank 60 is allowed to stand at room temperature for several tens of minutes to several hours, so that ozone can be naturally decomposed into oxygen water.

  In the oxygen water storage tank 60, a stirrer can be attached inside to promote decomposition of ozone in the ozone water. The stirrer may have any shape, but is preferably one that can uniformly stir the ozone water in the oxygen water storage tank 60. In addition, if the shock is excessively applied by stirring, oxygen dissolved in water is degassed. Therefore, it is preferable to perform stirring gently. In the oxygen water storage tank 60, if stirring is performed for several minutes at room temperature, ozone is decomposed and the oxygen concentration in the water is stabilized, so that stirring is stopped thereafter.

  Further, in the oxygen water generator 20, the oxygen concentration detector 64 provided in the oxygen water storage tank 60 periodically measures the oxygen concentration of the oxygen water in the oxygen water storage tank 60. When the oxygen concentration becomes lower than the predetermined oxygen concentration, the pump 66 is driven by a control device (not shown) to return the oxygen water in the oxygen water storage tank 60 to the ozone water storage tank 44. At the same time, a control device (not shown) drives the pump 62 to send the ozone water in the ozone water storage tank 44 to the oxygen water storage tank 60.

  On the other hand, when the irrigation amount of oxygen water to the plant 56 is large and oxygen water is not stored in the oxygen water storage tank 60 for a long period of time, no decrease in oxygen concentration is observed. It does not have to be provided with a pipe or a pump 66 for refluxing to the storage tank 44.

  In order to effectively promote the growth of the plant 56, the oxygen concentration in the oxygen water is preferably 20 ppm or more and 60 ppm or less. When the oxygen concentration is less than 20 ppm, the effect of promoting the cultivation of the plant 56 is reduced. A value exceeding 60 ppm is not preferable because it takes too much time and cost to increase the oxygen concentration.

  Next, in the oxygen water irrigation apparatus 22 shown in FIG. 8, oxygen water is irrigated by driving the pump 70 by a timer (not shown). Oxygen water is introduced from the oxygen storage tank 60 to the pipe 72 via the pump 70 and further guided to the drip tube 74. The drip tube 74 has a small-diameter hole formed at a predetermined position, and the plant 56 is irrigated with a predetermined amount of oxygen water from the small-diameter hole. The irrigation amount is adjusted to an amount that allows water to sufficiently reach the plant 56. At this time, liquid fertilizer and oxygen water may be mixed and then irrigated.

  In addition, in the oxygen water irrigation apparatus 22, irrigation can be performed using a drip tube 72 introduced directly to the cultivation floor, or oxygen water can be irrigated to the plant 56 using a water spray tube instead of the drip tube 72.

  Examples in which the effects of ozone gas, ozone water, and oxygen water are observed are shown below. Two existing greenhouses were prepared as the cultivation room 10. On one side, the plant cultivation system 1 of this embodiment comprising an ozone gas generator 12, an ozone gas release device 14, an ozone water generator 16, an ozone water spray device 18, an oxygen water generator 20, an oxygen water irrigator 22 and the like is prepared. On the other hand, the experiment was performed in the environment of a normal greenhouse without using the plant cultivation system 1.

  A 200 L ozone water storage tank 44 and a 500 L oxygen water storage tank 60 were prepared in the greenhouse where the plant cultivation system 1 was introduced. First, 200 L of tap water was sent to the ozone water storage tank 44. Thereafter, the ozone gas generator 12 was operated to generate 10 g / hour of ozone gas, and ozone gas having a flow rate of 4 L / min was sent to the ejector 40. Then, the pump 48 is driven to feed the water in the ozone water storage tank 44 to the ejector 40 at a flow rate of 50 L / min, ozone gas and water are mixed in the ejector 40, and the ozone water is passed through the mixing device 42. It was stored in the storage tank 44.

  In the ozone water generator 16, ozone water was circulated from the ozone water storage tank 44 to the ejector 40 at a flow rate of about 50 L / min for about 20 minutes, and the ozone concentration in the ozone water was adjusted between 2 ppm and 5 ppm.

  After the ozone concentration in the ozone water in the ozone water storage tank 44 reaches a predetermined concentration between 2 ppm and 5 ppm, the ozone water is sent to the oxygen water storage tank 60, and a predetermined amount of ozone water is supplied to the oxygen water storage tank 60. Reserved. And in the oxygen water storage tank 60, the ozone dissolved in ozone water was decomposed | disassembled by stirring, and oxygen water was produced | generated. At this time, the oxygen concentration in the oxygen water was about 40 ppm.

  As the plant 56, experiments were conducted using roses that are vulnerable to diseases and pests. The rose varieties used were Jeanne d'Arc. As an experiment, seven planters were prepared, and four roses were planted in each planter, and branches were cut at a height of about 15 cm from the origin. Then, according to the test content shown in Table 1, the influence of the disease and pest on the rose and the state of breeding were observed.

  The factors of the experiment are the presence or absence of ozone gas release, the presence or absence of ozone water spray, and the presence or absence of oxygen water irrigation. In this case, a planter that did not release ozone gas was placed in a normal greenhouse without using the plant cultivation system 1, and a planter that examined the effect of ozone gas release was placed in a greenhouse with the plant cultivation system 1. The ozone gas concentration was 0.01 ppm or more and 0.05 ppm or less near the plant 56.

  Release of ozone gas and spraying of ozone water were performed simultaneously at a rate of once per hour. In addition, oxygen water was irrigated once per hour from 6:00 to 16:00, and once at midnight at night.

  The experiment was conducted for 4 weeks, and the effects of the pests of roses and the state of breeding were observed. The observations included the presence or absence of disease, the presence or absence of pests, the number and growth of shoots, the length and thickness of rose stems, variations in length, the size of flowers, the color and gloss of leaves, and the size of the stock. . Table 1 shows the test contents, Table 2 shows the results of the effects of the pests, and Table 3 shows the results of growing the roses.

The following results were found from the test results.
From the results of Tables 2 and 3, the overall growth of roses was better in the greenhouse where ozone gas was released. This is because the disease and pest were effectively prevented. As is clear from the results shown in Table 2, roses in the greenhouse that released ozone gas did not cause powdery mildew, although small discoloration was observed on the leaves when ozone water spraying was not performed. In addition, ozone gas alone was effective in suppressing disease. In addition, no damage caused by pests occurred, and it was proved that they have a repellent effect against pests.

  The spraying of ozone water, when used in combination with ozone gas, did not cause any disease or pest damage, and was effective in preventing pests effectively. High-concentration ozone gas is toxic to plants and humans, but the ozone in ozone water is stable, so the toxicity is low, and no phytotoxicity occurs even if ozone water with a concentration of 1 ppm or more is sprayed on plants. It has the effect of eliminating pathogens and pests that have invaded plants. Therefore, the ozone gas concentration is adjusted to 0.01 ppm or more and 0.1 ppm or less in the vicinity of the plant 56, and by using together with 1 ppm or more ozone water spray, the pathogenic bacteria and pests that have invaded the cultivation room 10 are effectively eliminated. It was confirmed.

  On the other hand, rose leaves sprayed with ozone water had very good color and gloss. This is because the leaf was activated to sterilize the leaf surface. Furthermore, it was confirmed that the ozone water spray was effective in cooling roses during the daytime temperature rise period and contributed to the growth of roses.

  Even if water is simply sprayed, the cooling effect is recognized, but since miscellaneous bacteria are propagated in the water, spraying water to increase humidity promotes the growth of bacteria and makes roses susceptible to disease . However, since there are almost no bacteria in the ozone water, it was confirmed that spraying ozone water to increase the humidity does not cause rose disease.

  Furthermore, from the results in Table 3, irrigation with oxygen water increased the occurrence of rose buds more than twice, and the stems and strains grew significantly. The stems were thicker and longer than usual, and the strains grew larger. As a result, the flower size was larger than usual. In addition, the variation in stem length was reduced, and all planter roses that had been irrigated with oxygen water grew in the same way. On the other hand, roses that were not irrigated with oxygen water had normal stems and strains with smaller flowers.

  From the above results, it was confirmed that the plant cultivation system 1 in the present invention effectively prevented the plant 56 from being damaged by diseases and pests, and promoted the growth of the plant 56 effectively.

1 is an overall view of a plant cultivation system according to an embodiment of the present invention. It is an external view of the cultivation room of the plant cultivation system concerning the embodiment of the present invention. It is a block diagram of the ozone gas generator used for the plant cultivation system which concerns on embodiment of this invention. It is a block diagram of the ozone gas discharge | release apparatus used for the plant cultivation system which concerns on embodiment of this invention. It is a block diagram of the ozone water production | generation apparatus used for the plant cultivation system which concerns on embodiment of this invention. It is a block diagram of the ozone water spraying apparatus used for the plant cultivation system which concerns on embodiment of this invention. It is a block diagram of the oxygen water production | generation apparatus used for the plant cultivation system which concerns on embodiment of this invention. It is a block diagram of the oxygen water irrigation apparatus used for the plant cultivation system which concerns on embodiment of this invention.

DESCRIPTION OF SYMBOLS 1 Plant cultivation system 10 Cultivation room 12 Ozone gas generator 14 Ozone gas discharge device 16 Ozone water generation device 18 Ozone water spray device 20 Oxygen water generation device 22 Oxygen water irrigation device 24 Compressor 26 Dehumidifier 28 Adsorption tower 30 Ozonizer 32 Valve 34 Pipe 36 Ozone gas discharge nozzle 38 Ozone gas concentration detector 40 Ejector 42 Mixing device 44 Ozone water storage tank 46 Ozone concentration detector 48 Pump 49 Water supply pipe 50 Pump 52 Pipe 54 Ozone water spray nozzle 56 Plant 58 Cultivation bed 60 Oxygen water storage tank 62 Pump 64 Oxygen concentration detector 66 Pump 70 Pump 72 Piping 74 Drip tube

Claims (5)

A cultivation room forming a closed space for cultivating plants;
An ozone gas generator for generating ozone gas;
In a plant cultivation system provided with an ozone gas discharge device which discharges ozone gas generated by the ozone gas generator into a closed space in the cultivation room,
An ozone water generator for dissolving ozone gas in water to generate ozone water;
An ozone water spraying device for spraying ozone water generated by the ozone water generating device onto the plants in the cultivation room;
An oxygen water generator for decomposing ozone in the ozone water to generate oxygen water;
An oxygen water irrigation device that irrigates oxygen water produced by the oxygen water production device to the cultivation floor of the plant in the cultivation room;
The said ozone water production | generation apparatus produces | generates ozone water whose ozone concentration is higher than the said ozone gas, The plant cultivation system characterized by the above-mentioned.   The plant cultivation system of Claim 1 WHEREIN: The ozone concentration of the said ozone gas is 0.01 ppm or more and 0.1 ppm or less, The plant cultivation system characterized by the above-mentioned.   The plant cultivation system of Claim 1 or 2 WHEREIN: The ozone concentration of the said ozone water is 1 ppm or more and 7 ppm or less, The plant cultivation system characterized by the above-mentioned.   The plant cultivation system of any one of Claim 1 to 3 WHEREIN: The spray nozzle of the said ozone water spray apparatus is provided in the range of 0.5 m or more and 5 m or less from the said plant, The plant characterized by the above-mentioned. Cultivation system.   The plant cultivation system of any one of Claim 1 to 4 WHEREIN: The oxygen concentration in the said oxygen water is 20 ppm or more and 60 ppm or less, The plant cultivation system characterized by the above-mentioned.

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