JP2005328702A - Lighting device for growing plant - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting device for growing plants used for controlling the growth of plants planted close to one another, promoting the growth of the plants and also reducing disease damage on the plants through solving the chronic lack in sunshine at the side surfaces and/or the lower parts of the plants. <P>SOLUTION: This lighting device for growing plants 1 is provided with an upper part lighting fixture 2 lighting the plants P from above, a side part lighting fixture 3 and a lower part lighting fixture 4 set at the side and lower part positions of the plants P, respectively, and lighting the side surfaces and the lower parts of the plants P. The side part lighting fixture 3 and the lower part lighting fixture 4 artificially apply the light toward the side surfaces and the lower parts of the plants P, respectively, so as to solve the chronic lack in sunshine at the side surfaces and the lower parts of the plants P, and thereby promote the growth of the plants even under such a condition that the plants P are relatively thickly planted. The promotion of the growth of the plants results in enhancing the resistance of the plants P to diseases so as to make the plants P hardly get the diseases. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a plant-growing lighting device used for controlling the growth of plants planted in close proximity.

  Conventionally, a completely closed plant growing system (a system in which plants are placed in a space where outside light and outside air are blocked to provide an appropriate temperature / humidity environment and light environment for plants), an agricultural greenhouse or Plant cultivation lighting devices are used to grow plants under conditions where plants are planted relatively densely, such as in-house cultivation such as glass house or outdoor cultivation.

  Such a plant-growing lighting device, for example, in the above-mentioned facility cultivation, compensates for the lack of daylight in the daytime with an artificial light source installed on the top of the plant in the morning or evening, or consciously extends the day length with an artificial light source. As a representative example of this, there is an electric chrysanthemum (mainly Aki chrysanthemum, which uses the nature of flower buds when the day length is shortened. An example of chrysanthemum that adjusts the time).

  However, in such a conventional plant-growing lighting device, light is emitted toward the plant from an artificial light source installed on the upper part of the plant. Even during irradiation or during the day, there was chronic lack of sunlight (ultraviolet rays and visible light) at the side and bottom positions of the plants. For this reason, in the side surface and the lower part of the plant, the growth of the plant is deteriorated or the plant is easily affected by a disease.

  By the way, as one of the causes of such diseases, filamentous fungi that propagate in spores such as gray mold disease, mycorrhizal disease, tomato ring rot disease, white star disease, powdery mildew, downy mildew, anthrax disease ( Mold) is known. And these filamentous fungi are known to promote the formation of spores by irradiation with UV-A around 365 nm, and to transmit the disease by the propagation of spores released into the air ( Hereinafter, such a filamentous fungus is referred to as a highly light-dependent airborne pathogen.

  Usually, when such plant diseases occur, they are dealt with promptly, but direct spraying on seedlings and deliverables is a social problem because there are concerns about adverse effects on the human body. There is a current situation that people want to avoid the use of drugs as much as possible. For this reason, methods for reducing plant diseases without using drugs have been studied.

On the other hand, in addition to the plant upper part, the apparatus which installed the lighting fixture also in the soil vicinity where the plant is planted is known (for example, refer patent document 2). This device is a device for controlling pests by properly using the light colors of the luminaire installed on the top of the plant and the luminaire installed near the soil.
JP-A-6-209654 Japanese Patent Laid-Open No. 11-192044

  However, the device described in Patent Document 2 is intended to control pests, and in the situation where plants are planted relatively densely, improvement of poor plant growth at the side and lower positions of the plant is achieved. And plant disease cannot be reduced.

  The present invention has been made to solve the above-described problems, and by eliminating the chronic lack of sunshine in the side and lower positions of plants under the circumstances where plants are planted relatively densely and cultivated. Another object of the present invention is to provide a plant-growing lighting device that can promote plant growth and reduce plant diseases.

  In order to achieve the above object, the invention of claim 1 is directed to a plant growth lighting device including an upper lighting device that emits light from above a plant in order to control the growth of plants planted in close proximity. In order to compensate for the lack of sunshine in the side and / or lower position of the plant, the side lighting device is installed at the side and / or lower position of the plant and emits light toward the side and / or lower position of the plant, and In addition, a lower luminaire is further provided.

  The invention of claim 2 is the invention of claim 1, wherein the light emitted from the side lighting device and / or the lower lighting device has a wavelength of 400 to 800 nm for promoting the growth of plants, and In addition, UV-B having a wavelength of 280 to 340 nm for suppressing plant diseases caused by air-borne pathogens having high light dependency is included.

  According to a third aspect of the present invention, in the invention according to the first or second aspect, the side lighting device and / or the lower lighting device is arranged in the height direction of the plant as the plant grows. The light distribution is adjustable and the amount of light to be irradiated is also adjustable.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the plant is installed on a floor surface on which a plant is planted, and the direction of the floor surface is from the side lighting device and / or the lower lighting device. It is characterized by comprising a floor reflector that reflects the light emitted toward the plant toward the plant.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the solar radiation is installed on the side surface and / or the lower position of the plant in order to monitor the amount of solar radiation on the side surface and / or the lower position of the plant. And a first illumination control means for controlling a lighting time and / or a light amount of the side illumination device and / or the lower illumination device based on a detection result by the illumination sensor. To do.

  The invention of claim 6 is the invention according to any one of claims 1 to 5, wherein the side lighting device and / or the lower lighting device is installed substantially continuously in parallel with the row of plants. It is characterized by.

  The invention of claim 7 is characterized in that, in the invention of any one of claims 1 to 6, the light color of the side lighting device and / or the lower lighting device can be converted.

  The invention according to claim 8 is the invention according to claim 7, further comprising second illumination control means for controlling the light color of the side lighting equipment and / or the lower lighting equipment, wherein the second lighting control means comprises: In the daytime, the side lighting device and / or the lower lighting device are all irradiated with white light to compensate for the lack of sunshine on the side surface and / or the lower part of the plant. UV-B with a wavelength of 280-340 nm for suppressing sporulation or blue light with a wavelength of 400-500 nm, red light with a wavelength of 600-700 nm for improving the resistance of plants, or for supplementing the lack of daylight Any one or more of white light is irradiated on the side lighting device and / or the lower lighting device.

  According to the invention of claim 1, artificial light is directed toward the side surface and / or the lower position of the plant by the side lighting device and / or the lower lighting device installed at the side and / or lower position of the plant. Since irradiation is performed, even in a situation where plants are planted relatively densely, chronic shortage of sunshine in the side surface and / or lower position of the plant is eliminated, and plant growth is promoted. Further, by promoting the growth of the plant, the resistance of the plant to the disease increases, and the plant becomes difficult to suffer from the disease.

  According to invention of Claim 2, the light irradiated from a side luminaire and / or a lower luminaire is light having a wavelength of 400 to 800 nm for promoting the growth of plants and / or highly dependent on light. Since UV-B having a wavelength of 280 to 340 nm for suppressing plant diseases caused by airborne pathogens is contained, the growth of the plant is promoted by the light having a wavelength of 400 to 800 nm, and the plant is hardly affected by the disease. Moreover, since UV-B directly acts on filamentous fungi, spore formation and hyphal growth can be suppressed, so that the spread of disease can be suppressed.

  According to invention of Claim 3, since a side part lighting fixture and / or a lower lighting fixture can adjust the light distribution of the height direction of a plant, and the light quantity to irradiate according to growth of a plant, a plant Depending on the growth state of the plant, light can be efficiently irradiated toward the side surface and / or the lower position of the plant.

  According to invention of Claim 4, since the light irradiated toward the direction of the floor surface from the side luminaire and / or the lower luminaire can be reflected toward the plant by the floor reflector, the plant It is possible to efficiently irradiate light on the side surface and / or the lower position.

  According to the invention of claim 5, by monitoring the amount of solar radiation on the side surface and / or the lower position of the plant with the illuminance sensor, the lighting time and / or the amount of light of the side lighting device and / or the lower lighting device can be controlled. As a result, the side and / or lower position of the plant can accurately grasp how much light is insufficient and can efficiently irradiate the plant with light.

  According to the sixth aspect of the present invention, since the side lighting device and / or the lower lighting device are installed substantially continuously in parallel with the row of plants, the individual side lighting device and / or the lower lighting device are provided. Even if the plants are planted in a line over a wide range with respect to the irradiation range of the instrument, these plants can be efficiently irradiated with light.

  According to invention of Claim 7, since the light color of a side part lighting fixture and / or a lower lighting fixture can be converted, by selecting an optimal light color according to a situation, it is more effective for a plant. While promoting growth, plant diseases can be reduced.

  According to the invention of claim 8, by the second lighting control means, white light is radiated to all the lighting devices of the side lighting device and / or the lower lighting device during the day, and UV-B or blue is used at night. Since one or more of light, red light, or white light is irradiated on the side lighting device and / or the lower lighting device, the lack of sunlight on the side surface and / or lower position of the plant is improved during the daytime. In addition, by selecting an optimal light color according to the situation at night, it is possible to more effectively promote plant growth and reduce plant diseases.

  Hereinafter, the plant growth lighting device according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. The plant-growing lighting device 1 emits light to a plant that is planted in a relatively dense state in a completely closed type plant-growing system, facility cultivation such as an agricultural greenhouse or glass house, or outdoor cultivation. A device used to irradiate.

  The plant growing lighting device 1 includes an upper lighting device 2 installed at a position above the plant P in order to irradiate light from above the plant P, and a plant P to irradiate light toward the side surface position of the plant P. The side lighting device 3 installed at the side position of the plant P and the lower lighting device 4 installed at the lower position of the plant P for irradiating light toward the lower position of the plant P are provided. In FIG. 1B, only the light source 21 and the reflecting plate 22 which are constituent members of the upper lighting fixture 2 are shown. Similarly, the light source 31 and the reflecting plate 32 of the side lighting fixture 3 and the lower lighting are shown below. Only the light source 41 of the instrument 4 is shown.

  The plant P is planted side by side with the ridge F formed on the floor G, and the side lighting fixture 3 and the lower lighting fixture 4 are substantially parallel to the ridge F (substantially parallel to the row of plants P). It is installed continuously. More specifically, for example, a fluorescent lamp covered with a cylinder or the like and subjected to waterproofing processing is disposed substantially parallel to the ridge F on the side surface and the lower position of the plant P, or an incandescent bulb, a halogen bulb, or an LED with low output The side lighting device 3 and the lower lighting device 4 are installed by arranging a plurality of lamps or the like in parallel with the lamp. Moreover, the side lighting fixture 3 and the lower lighting fixture 4 are installed by arranging a continuous light source such as a hollow light guide type lighting fixture, an optical fiber, or an EL fixture having a long and narrow shape substantially parallel to the flange F. It is also effective to do.

  Thus, since the side luminaire 3 and the lower luminaire 4 are installed substantially continuously in parallel with the rows of the plants P, the plants for the irradiation range of the individual luminaires 3 and 4 are arranged. Even when P is planted in a line over a wide range, light can be efficiently applied to the side surfaces and lower positions of the plants P.

  Moreover, since these side part lighting equipment 3 and the lower lighting equipment 4 installed in the side and lower position of the plant P irradiate light toward the side surface and the lower position of the plant P, it is relatively dense. Even in the situation where the plant is planted, chronic shortage of sunlight at the side and lower positions of the plant P is resolved, and the growth of the plant P is promoted. In addition, by promoting the growth of the plant P, the resistance of the plant P to the disease is increased, and the plant P is hardly affected by the disease.

  The light sources 31 and 41 used for the side lighting apparatus 3 and the lower lighting apparatus 4 are light sources that emit light having a wavelength in the range of 400 to 800 nm, or ultraviolet light having a wavelength in the range of 280 to 340 nm (hereinafter referred to as UV- The light source is preferably at least one of the light sources that irradiate (B). A light source that emits light in the wavelength range of 400 to 800 nm is used for the purpose of promoting the growth of plants. Examples of such a light source include a light bulb, a halogen light bulb, a white fluorescent lamp, or a high-intensity discharge lamp (low-pressure sodium lamp, high-pressure sodium lamp, metal halide lamp, mercury lamp).

Moreover, as a light source which irradiates UV-B, it uses for the purpose of suppressing the airborne plant disease with high light dependence. Examples of such a light source include a tanning fluorescent lamp, a mercury lamp, or a high-intensity discharge lamp (metal halide lamp). Actually, a medium inoculated with anthracnose fungus was placed in the dark room, and only UV-B fluorescent lamp or white fluorescent lamp (comparative example) was turned on for 7 days, and UV-B mycelium growth inhibition test was conducted. As a result, for the sample irradiated with light having a luminance of 220 lx and a UV-B amount of 0.4 μW / cm ² with a white fluorescent lamp, hyphal growth was observed, whereas with a UV-B fluorescent lamp, an illuminance of 11 No visible mycelial growth was observed for the sample irradiated with light of .5 lx, UV-B amount 31.8 μW / cm ² . This is thought to be due to the fact that UV-B directly acts on filamentous fungi, thereby suppressing spore formation and hyphal growth.

  Thus, when the light irradiated from the side lighting fixture 3 and the lower lighting fixture 4 includes light having a wavelength of 400 to 800 nm, the growth of the plant P is promoted, and the plant P is hardly affected by the disease. . Moreover, since the light irradiated from the side lighting fixture 3 and the lower lighting fixture 4 contains UV-B, the growth of mycelia can be suppressed, so that the spread of disease can be suppressed.

  As shown in FIG. 2, the side lighting fixture 3 and the lower lighting fixture 4 do not need to be configured by one light source. For example, the light sources 31a and 31b of the side lighting fixture 3 are used as plants. A plurality of them may be arranged in the height direction a of P so that the side surface of the plant P is irradiated. Further, for example, by arranging the filters 23, 33 a, 33 b, 43 between the plant P and the light sources 21, 31 a, 31 b, 41, UV-A around 365 nm that promotes the formation of filamentous fungi spores is filtered 23. , 33a, 33b, 43 may be absorbed. Moreover, about the irradiation time of the artificial light by the illuminating device 1 for plant cultivation, both the case where it carries out only in the morning and evening like the normal supplementary light illumination and the case where it carries out from the daytime can be considered.

  Next, a second embodiment of the present invention will be described with reference to FIG. The plant growth lighting device 1 in the present embodiment can adjust the light distribution of the side lighting device 3 and the lower lighting device 4 in the height direction a of the plant P in conjunction with the growth of the plant P, and It differs from the first embodiment in that the amount of light to be irradiated is adjustable.

The means for adjusting the light distribution of the side lighting fixture 3 and the lower lighting fixture 4 is particularly limited as long as the light distribution of the side lighting fixture 3 and the lower lighting fixture 4 is adjustable in the height direction a of the plant P. For example, as shown in FIGS. 3A and 3B, the installation angles of the light sources 31a, 31b, and 41 of the side lighting device 3 and the lower lighting device 4 are indicated by arrows b _{1 to} b ₃ . The light distribution may be adjusted in the height direction a of the plant P by making it adjustable. Moreover, you may enable it to adjust the light distribution of the side part lighting fixture 3 and the lower lighting fixture 4 by attaching the reflecting plate which can adjust light distribution to the light sources 31a, 31b, and 41. FIG.

  Further, the means for adjusting the light quantity of the side lighting fixture 3 and the lower lighting fixture 4 is not particularly limited, and for example, as shown in FIGS. 3 (a) and 3 (b), the side lighting fixture 3 and By controlling the supply of power to the lower lighting fixture 4 to turn on or off the light sources 31a, 31b, 41, the amount of light emitted from the side lighting fixture 3 and the lower lighting fixture 4 is adjusted. Also good. In addition, in Fig.3 (a), the light sources 21 and 31b of a light extinction state are shown with the dotted line.

  The light distribution and the amount of light of the side lighting device 3 and the lower lighting device 4 are adjusted in accordance with the growth of the plant P. For example, as shown in FIG. 3A, in the initial growth stage, when the plant P has not grown so much and the plant P is still small, the light sources 21 of the upper lighting device 2 and the side lighting device 3 are used. 31b are turned off, and the attachment angles of the light sources 31a and 41 of the side lighting fixture 3 and the lower lighting fixture 4 are adjusted, thereby suppressing the spread of the light distribution and reducing the amount of light. On the other hand, as shown in FIG. 3 (b), as the plant P becomes larger, the light sources 21 and 31 b of the upper lighting fixture 2 and the side lighting fixture 3 are turned on, and the side lighting fixture 3 and the lower lighting fixture 4 are turned on. By adjusting the mounting angle of the light sources 31a, 31b and 41, the light distribution is widened and the light quantity is also increased. In addition, how to adjust the light distribution and the light amount of the side lighting device 3 and the lower lighting device 4 is not necessarily limited to the above-described example, and the case where the light amount of the upper lighting device 2 is small or the plant P itself is compared. When a large amount of light is required, the light sources 21 and 31b of the upper lighting device 2 and the side lighting device 3 may be turned on even in the initial growth stage.

  According to the plant growth lighting device 1 of the present embodiment, the light distribution in the height direction a of the plant P and the amount of light can be adjusted along with the growth of the plant P. Thus, light can be efficiently irradiated toward the side surface and the lower position of the plant P.

  Next, a third embodiment of the present invention will be described with reference to FIG. The plant-growing lighting device 1 according to this embodiment is different from the first and second embodiments in that it includes a floor reflector 5.

  The floor reflecting plate 5 is installed on the floor G on which the plant P is planted, and the light irradiated in the direction of the floor G from the light sources 31 and 41 of the side lighting fixture 3 and the lower lighting fixture 4 is planted. Reflects toward P. The material used for the floor reflector 5 is not particularly limited as long as it can efficiently reflect the light emitted from the side luminaire 3 and the lower luminaire 4 and is used as a reflector. Known materials can be used.

  According to the plant growing lighting device 1 of the present embodiment, the light irradiated toward the floor G from the side lighting fixture 3 and the lower lighting fixture 4 is directed toward the plant P by the floor reflector 5. Since it can reflect, the plant P can be efficiently irradiated with light.

  Next, a fourth embodiment of the present invention will be described with reference to FIG. The plant growing lighting device 1 according to the present embodiment is based on the illuminance sensors 6a and 6b for monitoring the amount of solar radiation on the side surface and the lower position of the plant P, and the detection result by the illuminance sensors 6a and 6b. It differs from other embodiment by the point provided with the control part 7 (1st illumination control means) which controls the lighting time and light quantity of the fixture 3 and the lower lighting fixture 4. FIG.

  The control unit 7 is connected to the illuminance sensors 6 a and 6 b through the sensor signal line 8, and is connected to the upper lighting device 2, the side lighting device 3, and the lower lighting device 4 through the dimming signal line 9. . And based on the illuminance data of the side part and lower part position of the plant P input from the illuminance sensors 6a, 6b, the lighting time and the light quantity of the light sources 21, 31, 41 of each lighting fixture 2, 3, 4 are determined, The lighting fixtures 2, 3, 4 are turned on and off, and a dimming signal for controlling the amount of light is output to each of the lighting fixtures 2, 3, 4 via the dimming signal line 9. The control method of each lighting fixture 2, 3, and 4 by the control part 7 is not specifically limited, It determines suitably according to the kind of the plant P to be cultivated, its breeding stage, and the breeding environment. For example, in order to secure a predetermined amount of light in each time zone, based on the illuminance data input from the illuminance sensors 6a and 6b, The lighting time may be adjusted. In addition, an illuminance sensor is also arranged at the upper position of the plant P to sense the upper light amount at the same time, and the light amounts at the side and lower positions of the plant P are adjusted to be equal to the light amount at the upper position of the plant P. You may do it. Moreover, you may adjust the lighting time and light quantity of the side lighting fixture 3 and the lower lighting fixture 4 according to the predetermined integrated light quantity of the day or the integrated light quantity of the plant upper part.

  According to the plant growth lighting device 1 of the present embodiment, the illuminance sensors 6a and 6b monitor the amount of solar radiation on the side surface and the lower part of the plant P, and the lighting time and light amount of the side lighting device 3 and the lower lighting device 4 are determined. Since it can control now, it can grasp | ascertain exactly how much light the side and lower part position of the plant P are actually insufficient, and can irradiate the plant P efficiently.

  Next, a fifth embodiment of the present invention will be described with reference to FIG. The plant growing lighting device 1 according to the present embodiment can convert the light colors of the side lighting fixture 3 and the lower lighting fixture 4 and controls the light colors of the side lighting fixture 3 and the lower lighting fixture 4. It differs from other embodiment by the point provided with a control part (2nd illumination control means).

  The means for converting the light colors of the side lighting fixture 3 and the lower lighting fixture 4 is not particularly limited. For example, each lighting fixture 3, 4 includes a plurality of light-colored light sources, and the control unit Depending on the situation, the light colors of the respective lighting fixtures 3 and 4 may be converted by supplying power to the light sources of these respective light colors.

  The light color of each light source is not particularly limited. For example, in addition to a white light source that emits white light, a UV-B light source that emits UV-B, a blue light source that emits blue light, and red light. Examples include a red light source to be irradiated.

  Examples of the white light source include a light bulb, a halogen light bulb, a white fluorescent lamp, a high-intensity discharge lamp (low pressure sodium lamp, high pressure sodium lamp, metal halide lamp, mercury lamp). Examples of the UV-B light source include a fluorescent lamp for sunburn, a mercury lamp, or a high-intensity discharge lamp (metal halide lamp). Examples of the blue light source include a blue fluorescent lamp, a blue LED, a blue cold cathode fluorescent lamp, a blue EL, a blue electrodeless lamp, and a blue HID. Examples of the red light source include a red fluorescent lamp, a red LED, a red cold cathode fluorescent lamp, a red EL, a red electrodeless lamp, and a red HID. If a blue light source is used instead of white light, sporulation of powdery mildew can be suppressed. In addition, when a red light source is used instead of white light, the disease resistance of the plant itself increases, making it difficult to get sick.

  In this way, since the light colors of the side lighting device 3 and the lower lighting device 4 can be converted, by selecting the optimal light color according to the situation, the growth of the plant is more effectively promoted. , Plant diseases can be reduced.

  Next, referring to FIG. 6, when the light color of the lighting fixtures 3, 4 is changed between daytime and nighttime with respect to the light color control method of the side lighting fixture 3 and the lower lighting fixture 4 by the control unit. Will be described as an example. In FIG. 6, the lighting device that emits white light is denoted by 3a, the lighting device that emits UV-B light is denoted by 3b, the lighting device that emits blue light is denoted by 3c, and the lighting device 3d that emits red light. , Respectively.

  As shown in FIG. 6, in the daytime, all the side lighting fixtures 3 and the lower lighting fixtures 4 are irradiated with white light, while at night, the side lighting fixtures 3 and the lower lighting fixtures 4 are irradiated with UV- One or more of B or blue light, red light, or white light is irradiated. By doing in this way, the lack of sunshine in the side surface and the lower position of the plant P is improved during the day, and the optimal light color is selected according to the situation at night, so that the plant P can be more effectively used. While promoting growth, plant diseases can be reduced.

  In this embodiment, a plurality of colors at the same time at night (blue for the purpose of suppressing sporulation of powdery mildew, red for the purpose of controlling other diseases, UV-B ultraviolet rays, and for the purpose of improving resistance to diseases caused by the plant itself, However, in addition to this, all the lighting fixtures 3 and 4 are lit in the same color during a certain time period, and these lights may vary depending on the time period or day. The color may be changed. Moreover, you may make it change the light color radiated | emitted from the same lighting fixture according to a time slot | zone, lighting a several color simultaneously.

  Further, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the invention. For example, in the said embodiment, although the case where both the side part lighting fixture 3 and the lower lighting fixture 4 were used was demonstrated, either the side lighting fixture 3 or the lower lighting fixture 4 may be used.

(A) is a top view which shows the illuminating device for plant cultivation which concerns on the 1st Embodiment of this invention, (b) is an elevation view which shows the illuminating device. The elevation view of the illuminating device provided with a some side illuminating device and a filter. (A) and (b) are elevation views showing a lighting device for plant growth according to a second embodiment of the present invention, (a) is an elevation view at an early growth stage, and (b) is an early growth stage progress. Rear elevation view. The elevation view which shows the illuminating device for plant cultivation which concerns on the 3rd Embodiment of this invention. The elevation view which shows the illuminating device for plant cultivation which concerns on the 4th Embodiment of this invention. The top view which shows the illuminating device for plant cultivation which concerns on the 5th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Plant growth lighting device 2 Upper lighting fixture 3 Side lighting fixture 4 Lower lighting fixture 5 Floor reflector 6a, 6b Illuminance sensor 7 Control part 8 Sensor signal line 9 Dimming signal line P Plant

Claims (8)

In order to control the growth of plants that are planted in close proximity, in a plant growing lighting device comprising an upper lighting device that emits light from above the plant,
In order to compensate for the lack of sunshine in the side and / or lower position of the plant, the side lighting device is installed at the side and / or lower position of the plant and emits light toward the side and / or lower position of the plant and / or Or the plant lighting device characterized by further including a lower lighting fixture. The light emitted from the side luminaire and / or the lower luminaire is
It contains light of wavelength 400 to 800 nm for promoting the growth of plants and / or UV-B of wavelength 280 to 340 nm for suppressing plant diseases caused by air-borne pathogens with high light dependency. The plant growing lighting device according to claim 1. The side lighting device and / or the lower lighting device is:
3. The light distribution according to claim 1, wherein the light distribution is adjustable in the height direction of the plant and the amount of light to be irradiated is adjustable as the plant grows. Lighting device for plant cultivation.   A floor reflector that is installed on a floor surface on which a plant is planted and reflects light directed toward the floor surface from the side lighting device and / or the lower lighting device toward the plant surface; The plant growing lighting device according to any one of claims 1 to 3. In order to monitor the amount of solar radiation on the side and / or bottom of the plant, an illuminance sensor installed on the side and / or bottom of the plant;
A first illumination control means for controlling a lighting time and / or light amount of the side lighting device and / or the lower lighting device based on a detection result by the illuminance sensor;
The lighting device for plant cultivation according to any one of claims 1 to 4, characterized by comprising:   The plant for growing plants according to any one of claims 1 to 5, wherein the side lighting device and / or the lower lighting device is installed substantially continuously in parallel with a row of plants. Lighting device.   The lighting device for plant cultivation according to any one of claims 1 to 6, wherein the light color of the side lighting fixture and / or the lower lighting fixture can be converted. Second lighting control means for controlling the light color of the side lighting fixture and / or the lower lighting fixture,
The second lighting control means irradiates all the lighting devices of the side lighting device and / or the lower lighting device with white light to compensate for the lack of sunlight in the side surface and / or the lower position of the plant during the day, At night, UV-B with a wavelength of 280 to 340 nm or blue light with a wavelength of 400 to 500 nm for active suppression of sporulation of the pathogen, red light with a wavelength of 600 to 700 nm for improving the resistance of plants, or 8. The plant growing lighting device according to claim 7, wherein the side lighting device and / or the lower lighting device is irradiated with any one or more of white light for compensating for daylight shortage. .

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