JP2002272271A - Artificial light source unit for culturing plant or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an artificial light source unit which can irradiate cultivated plants or the like with light having a desired color and can thereby properly adjust the growth state of the plants or the like. SOLUTION: This light-emitting device (artificial light source unit) comprises many light-emitting diodes for emitting light having a desired color, a base on which the many light-emitting diodes are arranged in parallel, and a light- transmitting water-proof cover for covering the many light-emitting diodes on the base. The light-emitting device (artificial light source unit) can freely be set, has a high water-proof property, and hardly generates heat. The color of the emitted light of the light-emitting diodes can be selected for a desired color for promoting the growth of the plants or the like, and further the emitted light of the light-emitting diodes can be adjusted to a desired emitted light quantity, a desired light-emitting timing and a desired light-emitting time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial light source unit for regulating the growth of plants and the like.

[0002]

2. Description of the Related Art Lighting cultivation, which promotes plant growth using artificial light sources such as incandescent lamps, fluorescent lamps, and discharge lamps,
This has been done conventionally.

[0003] In the conventional form of using an artificial light source in plant cultivation, the photosynthetic reaction of a plant is induced by using only light emitted from the artificial light source as an energy source without using sunlight, thereby promoting plant growth. In some cases, the plant uses the sunlight as its main energy source to induce photosynthetic reactions in the plant and grow the plant, while using an artificial light source as an auxiliary light source to regulate its growth. . The former is plant cultivation by plant factory production or tissue culture performed indoors.Incandescent bulbs, fluorescent lamps, discharge lamps, etc. are installed directly above the plants, and light is radiated toward the plants directly below. It is supposed to. In addition, the latter one has a configuration in which an incandescent light bulb or a fluorescent light is installed immediately above a plant in almost the same manner.

[0004] By the way, a plant grows by taking in carbon dioxide, which is a raw material of a photosynthetic reaction, from the stomata existing abundantly behind the leaves into a leaf of the photosynthetic reaction, and performing a photosynthetic reaction.
The degree of opening of the pore serving as the carbon dioxide intake port is increased by the irradiation of light having a predetermined wavelength. Therefore, when light of a predetermined wavelength is intensively applied to the back of a plant leaf, the degree of stomatal opening increases, and at the same time, the amount of carbon dioxide taken up into the leaf increases, activating the photosynthetic reaction. The growth is promoted.

[0005] In addition, plants grow by performing a photosynthetic reaction using light of a predetermined wavelength as an energy source.

However, under conditions of low solar radiation, the photosynthesis is reduced, resulting in poor growth. For this reason,
Under the condition of a small amount of solar radiation, a discharge lamp having a high luminous intensity may be used for the purpose of supplementing the amount of solar radiation. However, since the discharge lamp generates a considerable amount of heat simultaneously with light emission, it cannot be applied to a plant from a short distance.
In addition, in the above-described configuration, much light diffuses to the surroundings without hitting the plant, and the energy use efficiency is not good.

On the other hand, when cultivated under the conditions of high temperature in summer and low solar radiation in winter, many of the plants used for agricultural production have an abnormally increased stem elongation, and become so-called prostrate. Become. In particular, in a situation where a seedling is cultivated, a prostituted seedling has a problem that it grows poorly after being planted in a field and becomes a strain with low productivity.

[0008] Furthermore, many plants used in the agricultural production deteriorate during their cultivation period due to the occurrence of mold that inhibits their growth, and the productivity may drop significantly. As a countermeasure, pesticides have generally been used. However, consumers are concerned about the adverse effects on the environment and the human body due to the recent use of pesticides, so it is difficult to use pesticides. For this reason, mold control without using pesticides has become important.

The present invention has been made on the basis of the above-mentioned circumstances, and a light-emitting diode having a desired light-emitting color is selected as a light source. It is an object of the present invention to provide an artificial light source unit for cultivating a plant or the like that solves the above-described problem by arranging the light sources in parallel.

[0010]

In order to achieve the object, the present invention is provided with the following means for solving the problems.

(1) The artificial light source unit for cultivating plants and the like according to the present invention comprises: a large number of light emitting diodes of a desired luminescent color; a base having the plurality of light emitting diodes arranged side by side; And a light-transmitting waterproof cover that covers many light-emitting diodes.

[0012] As described above, a plant grows by taking in carbon dioxide, which is a raw material for a photosynthetic reaction, from the stomata existing abundantly on the back of the leaf into the leaves of the carbon dioxide, and performing a photosynthetic reaction. The degree of opening of the pores on the back side of the leaf, which is an inlet for carbon dioxide, is increased by light of a predetermined color. Therefore, when the light of the predetermined color is intensively applied to the back surface of the leaf of the plant, the degree of stomatal opening increases, and at the same time, the amount of carbon dioxide taken up into the leaf increases, and the photosynthetic reaction becomes active. And growth is promoted.

Therefore, as described above, a large number of light emitting diodes of a desired emission color, a substrate having the multiple light emitting diodes juxtaposed, and a light-permeable waterproof cover for covering the large number of light emitting diodes on the substrate. Constitutes an artificial light source unit for cultivating plants and the like. Then, light of a desired color from a large number of light emitting diodes of the artificial light source unit is applied to growing and growing plants all day within a day, or daytime, nighttime, early morning, evening, etc. On the other hand, irradiation is performed from the ground side to the back surface of the leaves and the outer peripheral surface of the stem through a waterproof cover.

Thereby, the cultivation of ornamental plants, vegetables, fruit trees and any other crops under sunlight (including greenhouse cultivation, rain-protection house cultivation, greenhouse cultivation and outdoor cultivation without covering material) Cultivation and organization in plant factories (including plant factories that are used in combination with sunlight), where growth is controlled (for example, suppression of stem elongation), growth is promoted, yield is increased, pests are controlled, or artificial light is used. In the cultivation of the cultured plant, it is possible to control the growth of ornamental plants, vegetables, fruit trees and any other crops (for example, suppression of stem elongation), promote the growth, increase the yield, and control pests.

Moreover, in this case, each of the light emitting diodes is covered with a light-transmitting waterproof cover. Therefore, even if it is sprayed, it can be used without causing a problem such as a short circuit.

(2) The second aspect of the present invention is an artificial light source unit for cultivating plants or the like according to the first aspect of the present invention, wherein all the light-emitting colors of a large number of light-emitting diodes are blue. And

As described above, a plant grows by taking in carbon dioxide, which is a raw material of a photosynthetic reaction, from the stomata existing abundantly behind the leaves and performing a photosynthetic reaction. The above-mentioned pores, which are the intakes of the chromium, are more effectively opened particularly when the light has a blue wavelength.

Therefore, if the blue light is intensively applied to the back of the leaves of the plant being cultivated, the degree of opening of the pores is effectively increased, and the amount of carbon dioxide taken into the leaves is reduced. Increase and the photosynthetic reaction is activated. Growth is effectively promoted.

(3) The invention of claim 3 The artificial light source unit for cultivating plants or the like according to the present invention is characterized in that, in the configuration of the invention of claim 1, all the light-emitting colors of a large number of light-emitting diodes are red. And

Many of the plants used in agricultural production, when cultivated under high-temperature conditions in summer or under low solar radiation in winter, have abnormally increased stem elongation and become so-called prostrate. Especially in the situation of cultivating seedlings, the prostrate seedlings
Poor growth after planting in the field, resulting in low productivity.

On the other hand, the elongation of the stalk of the plant is the ratio of the light of the red wavelength to the sum of the light of the red wavelength and the light of the far infrared wavelength in the light received by the plant. It is known that by increasing it, it can be suppressed.

Therefore, as described above, when the red light emitting diode is used, the ratio of the light of the red wavelength can be effectively increased without reducing the total amount of light received by the plant, and the plant can be effectively used. Elongation can be suppressed.

(4) The fourth aspect of the present invention is the artificial light source unit for cultivating plants or the like according to the first aspect of the present invention, wherein all of the plurality of light-emitting diodes emit far-infrared light. It is characterized by having a wavelength.

Many of the plants used in agricultural production grow abnormally when grown under high temperature conditions in summer or under low solar radiation in winter, resulting in a so-called prolonged state. Especially in the situation of cultivating seedlings, the prostrate seedlings
Poor growth after planting in the field, resulting in low productivity.

On the other hand, the elongation of the stalk of the plant is caused by the light of the far-infrared wavelength in the sum of the light of the red wavelength and the light of the far-infrared wavelength in the light received by the plant. It is known that the ratio can be suppressed by increasing the ratio.

Therefore, as described above, when the red light emitting diode is used, the ratio of the light having the wavelength of the far-infrared color can be effectively increased without lowering the total amount of light received by the plant. In this way, plant elongation can be suppressed.

(5) Invention of claim 5 The artificial light source unit for cultivating plants or the like according to the present invention is the artificial light source unit of the invention of claim 1, wherein all of the light emitting colors of a large number of light emitting diodes have a white wavelength. It is characterized by having.

Many of the plants used in agricultural production, when cultivated under high-temperature conditions in summer or under low solar radiation in winter, have an abnormally increased stem elongation and become a so-called prolonged state. Especially in the situation of cultivating seedlings, the prostrate seedlings
Poor growth after planting in the field, resulting in low productivity.

On the other hand, the elongation of the stalk of the plant is caused by the white wavelength occupying the sum of the red wavelength light, the far infrared wavelength light, and the white light in the light received by the plant. It is known that it can be suppressed by increasing the ratio of light.

Therefore, as described above, when the red light emitting diode is used, the ratio of the light of the white wavelength can be effectively increased without reducing the total amount of light received by the plant, and the plant can be effectively used. Elongation can be suppressed.

(6) The invention according to claim 6 In the artificial light source unit for cultivating plants or the like according to the present invention, in the configuration of the invention according to claim 1, the emission colors of a large number of light emitting diodes are a combination of blue and red. It is characterized by.

The plant grows by taking in carbon dioxide, which is a raw material of a photosynthetic reaction, into the leaves from the stomata existing abundantly behind the leaves, and performing a photosynthetic reaction. The pores serving as the carbon dioxide intake are more effectively opened when blue and red light are combined. Therefore, when blue and red light are intensively applied to the back of the plant leaf, the degree of opening of the stoma is particularly effectively increased, and at the same time, the amount of carbon dioxide taken into the leaf is effectively increased, The photosynthetic reaction is more activated. As a result, plant growth is further promoted.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) FIGS.
1 shows a configuration and a use state of an artificial light source unit for cultivating a plant or the like according to Embodiment 1 of the present invention.

First, in FIGS. 1 to 5, reference numeral 1 denotes the artificial light source unit. The artificial light source unit 1 supports a large number of light-emitting diodes 12, 12,... In parallel in a longitudinal direction in two rows, and includes a base 11 provided with a lighting drive circuit therein. On the upper part of the base 11, the light emitting diodes 12, 12,.
The lighting drive circuit is connected to a light emission control device 2, a timer 3, and a power plug 4 via a power cable 5.

In this embodiment, all of the light-emitting diodes 12, 12,... On the base 11 are constituted by, for example, monochromatic blue light-emitting diodes having a peak wavelength of about 450 nm. And they are, for example, in FIG.
As shown in FIG. 4, along the longitudinal direction of the ridge-shaped medium A of the plants a, a,. They are arranged in two rows at a predetermined pitch P so as to be staggered.

In the case of this embodiment, the width W of the substrate 11 in the front-rear direction is, for example, as shown in FIG.
The plants a, a, a, a, a, a,
can be arranged without difficulty in the center of the ground part between a,..., and as shown in FIG. 1, the plants a, a, a, a, a, a,. The size is set so that the light B having the blue wavelength can be efficiently irradiated from the lower side to the back surface of the leaf having the pores. And for that purpose, the above-mentioned light emitting diodes 12, 12.
In FIG. 5, for example, as shown in FIG. 5, the lamp axes (optical axes) 12a, 12a are vertical axes OO 'by predetermined angles θ, θ, respectively.
It is installed on the upper surface of the base 11 so as to be inclined in each of the front and rear directions.

On the other hand, the artificial light source unit 1 configured as described above is located at the center of the ground on the culture medium A, for example, as shown in FIGS.
When the AC power supply (1) is connected via the power cable 5 and the power plug 4,
00V / 200V). Then, in the state of being connected to the AC power source, the light emission amount adjusting device 2 operates to supply a voltage value (or a current value) supplied to the lighting drive circuit of each of the light emitting diodes 12, 12,. In accordance with the growth process of the plants a, a,.
Is the light emitting diode 1 within one day (24 hours).
The ideal growth state of the plants a, a... Is realized by appropriately controlling the lighting time and the lighting time of 2, 12,.

The artificial light source unit for cultivating a plant or the like according to the present embodiment configured as described above is more specifically
Any plant cultivation performed under sunlight (including greenhouse cultivation, rain protection cultivation, greenhouse cultivation and outdoor cultivation without covering materials), as well as plants cultivated under artificial light without sunlight It can be used to grow ornamental plants, vegetables, fruit trees and any other crops in factories (including plant factories that combine with sunlight) and tissue culture plants.

Thus, the following conventional problems in cultivation of plants and the like can be effectively solved.

In general, plants grow by performing a photosynthetic reaction using light as an energy source. However, under conditions of low solar radiation, photosynthesis is reduced, resulting in poor growth. Conventionally, there have been cases where a discharge lamp is used for the purpose of supplementing the amount of solar radiation under the condition of a small amount of solar radiation. However, discharge lamps generate heat at the same time as light emission,
The plant could not be irradiated from a short distance, so that the amount of light that did not hit the plant and diffused to the surroundings was large, resulting in poor energy use efficiency.

However, the light emitting diodes 12, 12
.. Emit light of a blue wavelength effective for photosynthesis from a shorter distance and have less heat dissipation, and thus have a beneficial effect on supplementing the amount of solar radiation.

Many of the plants used in agricultural production are
When cultivated under high temperature conditions in summer or low solar radiation amount in winter, the amount of elongation of the stem increases abnormally, resulting in a so-called procrastination state. In particular, in a situation where seedlings are cultivated, the prostituted seedlings grow poorly after being planted in the field, and become strains with low productivity. The artificial light source unit 1 having the above configuration is also effective for replenishing the amount of solar radiation in such a case.

Furthermore, many of the plants used in the agricultural production are caused by the occurrence of mold that inhibits growth during the cultivation period.
Growth may deteriorate and productivity may drop significantly.
Therefore, pesticides are used in actual production. However, recently, there has been an increasing number of cases in which the use of pesticides has been refrained from the use of pesticides due to the rising voice of consumers who are concerned about the adverse effects on the environment and the human body. Therefore, it is important to develop pest control technology that does not use pesticides.

In this regard, it has been clarified that light having a blue wavelength suppresses the generation of mold. According to the artificial light source unit 1, the mold generated in such growing plants can be effectively controlled. can do.

In addition, when a light source device that has not been waterproofed as in the prior art is installed in a medium or a land area where plants are planted, a short circuit occurs due to rainwater or irrigation applied to the light source. It is a danger. However, the artificial light source unit 1 can be used without any problem because the waterproof cover is provided.

(Embodiment 2) The above-mentioned Embodiment 1
, The emission color of all of the large number of light emitting diodes 12, 12... Arranged in the front and rear two rows is configured to have a blue wavelength. The wavelength can be changed to a red wavelength of about 660 nm.

Elongation of the stem of the plant can be suppressed by increasing the ratio of the light of the red wavelength to the sum of the light of the red wavelength and the light of the far infrared wavelength in the light received by the plant. It has been known.

Therefore, in order to suppress the elongation of the stem of the seedling, a film having a low transmittance of far-infrared light and a high transmittance of red light is provided immediately above the plant so that the plant receives light. A technique has been developed in which the ratio of red light to the total of red light and far-infrared light is increased to suppress stem elongation.
However, in the case of the film, the total amount of light received by the plant is reduced, and the elongation of the stem is not significantly suppressed as compared with the case where the film is not used. For this reason, this technique has not reached a situation where it is widely used.

However, as in the present embodiment, the monochromatic red light emitting diodes 12, 1 having a peak wavelength of about 660 nm are used.
When 2 is used, the ratio of light having a red wavelength can be effectively increased without reducing the total amount of light received by the plant.

(Embodiment 3) The above-described Embodiment 1
, The light-emitting diodes of the large number of light-emitting diodes 12, 12,... Arranged in the front and rear two rows are configured to emit light of blue wavelengths. It can be changed to the light of the wavelength of.

This configuration is also effective for appropriately suppressing plant elongation, as in the case of the second embodiment.

(Embodiment 4) The above-described Embodiment 1
, The light emitting diodes of all of the large number of light emitting diodes 12, 12... Arranged in the front and rear two rows are configured to emit light of a blue wavelength. It can be changed to the light of the wavelength of.

This configuration is also effective in appropriately suppressing plant elongation, as in the case of the second embodiment.

(Embodiment 5) The above-described Embodiment 1
, The emission color of all of the large number of light-emitting diodes 12, 12... Arranged in the two rows before and after is constituted by light of blue wavelength. .. May be of a two-color combination type in which the diodes 12, 12,... Are alternately arranged for a blue wavelength (around 450 nm peak wavelength) and a red wavelength (around 660 nm peak wavelength).

The plant grows by taking in carbon dioxide, which is a raw material for the photosynthetic reaction, from the stomata existing abundantly behind the leaves into the leaves of the photosynthetic reaction, and performing the photosynthetic reaction. The degree of opening of the pore serving as the carbon dioxide intake port is particularly increased when light having a blue wavelength and light having a red wavelength are combined. Therefore, when the light of the blue wavelength and the light of the red wavelength as described above are concentratedly applied to the back of the leaves of the plant, the degree of opening of the pores is particularly effectively increased, and at the same time, the carbon dioxide in the leaves is increased. Is effectively increased, and the photosynthetic reaction is more activated. As a result, its growth is further promoted.

(Experimental example) Tomatoes were cultivated using the blue light source unit 1 of the first embodiment and the red light source unit 1 of the second embodiment. The growth is strong even under the bottom, the elongation of the stem can be sufficiently suppressed, and there is no occurrence of mold,
It has become healthy. The graph in FIG. 6 shows the effect of blue and red supplementary light during the day and the effect of blue light irradiation during the night on the growth of tomato grown in a greenhouse under natural light (treatment period: 27 days from cotyledon development).
Are respectively shown.

In the light conditions on the horizontal axis in FIG. 6, "blue day" is an example of supplementary light with blue light in the daytime, "natural" is an example of no supplementary light in the daytime, and "blue night" is a case of nighttime light. And "red daylight" indicates an example of supplementary light by red light during daytime.

[Brief description of the drawings]

FIG. 1 is a front view showing a use state of an artificial light source unit for cultivating plants or the like according to Embodiment 1 of the present invention.

FIG. 2 is a plan view of the same use state.

FIG. 3 is a front view of the artificial light source unit for cultivating plants or the like according to Embodiment 1 of the present invention in a partially cut-out state.

FIG. 4 is a plan view of the artificial light source unit in a partially cut-away state.

FIG. 5 is a sectional view of the artificial light source unit taken along a line AA in FIG. 4;

FIG. 6 is a graph showing the cultivation results of the respective embodiments in which the emission color of the artificial light source unit is changed.

[Explanation of symbols]

1 is an artificial light source unit, 2 is a light emission control device, 3 is a timer, 5 is a power cable, 11 is a base, 12 is a light emitting diode, 13 is a waterproof cover, A is a plant culture medium, B is light,
a is a plant.

[Procedure amendment]

[Submission date] March 19, 2001 (2001.3.1.
9)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Artificial light source unit for cultivating plants etc.

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial light source unit for regulating the growth of plants and the like.

[0002]

2. Description of the Related Art Lighting cultivation, which promotes plant growth using artificial light sources such as incandescent lamps, fluorescent lamps, and discharge lamps,
This has been done conventionally.

[0003] In the conventional form of using an artificial light source in plant cultivation, the photosynthetic reaction of a plant is induced by using only light emitted from the artificial light source as an energy source without using sunlight, thereby promoting plant growth. In some cases, the plant uses the sunlight as its main energy source to induce photosynthetic reactions in the plant and grow the plant, while using an artificial light source as an auxiliary light source to regulate its growth. . The former is plant cultivation by plant factory production or tissue culture performed indoors.Incandescent bulbs, fluorescent lamps, discharge lamps, etc. are installed directly above the plants, and light is radiated toward the plants directly below. It is supposed to. In addition, the latter one has a configuration in which an incandescent light bulb or a fluorescent light is installed immediately above a plant in almost the same manner.

[0004] By the way, a plant grows by taking in carbon dioxide, which is a raw material of a photosynthetic reaction, from the stomata existing abundantly behind the leaves into a leaf of the photosynthetic reaction, and performing a photosynthetic reaction.
The degree of opening of the pore serving as the carbon dioxide intake port is increased by the irradiation of light having a predetermined wavelength. Therefore, when light of a predetermined wavelength is intensively applied to the back of a plant leaf, the degree of stomatal opening increases, and at the same time, the amount of carbon dioxide taken up into the leaf increases, activating the photosynthetic reaction. The growth is promoted.

[0005] In addition, plants grow by performing a photosynthetic reaction using light of a predetermined wavelength as an energy source.

However, under conditions of low solar radiation, the photosynthesis is reduced, resulting in poor growth. For this reason,
Under the condition of a small amount of solar radiation, a discharge lamp having a high luminous intensity may be used for the purpose of supplementing the amount of solar radiation. However, since the discharge lamp generates a considerable amount of heat simultaneously with light emission, it cannot be applied to a plant from a short distance.
In addition, in the above-described configuration, much light diffuses to the surroundings without hitting the plant, and the energy use efficiency is not good.

On the other hand, when cultivated under the conditions of high temperature in summer and low solar radiation in winter, many of the plants used for agricultural production have an abnormally increased stem elongation, and become so-called prostrate. Become. In particular, in a situation where a seedling is cultivated, a prostituted seedling has a problem that it grows poorly after being planted in a field and becomes a strain with low productivity.

[0008] Furthermore, many plants used in the agricultural production deteriorate during their cultivation period due to the occurrence of mold that inhibits their growth, and the productivity may drop significantly. As a countermeasure, pesticides have generally been used. However, consumers are concerned about the adverse effects on the environment and the human body due to the recent use of pesticides, so it is difficult to use pesticides. For this reason, mold control without using pesticides has become important.

The present invention has been made on the basis of the above-mentioned circumstances, and a light-emitting diode having a desired light-emitting color is selected as a light source. It is an object of the present invention to provide an artificial light source unit for cultivating a plant or the like that solves the above-described problem by arranging the light sources in parallel.

[0010]

In order to achieve the object, the present invention is provided with the following means for solving the problems.

(1) The artificial light source unit for cultivating plants and the like according to the present invention comprises: a large number of light emitting diodes of a desired luminescent color; a base having the plurality of light emitting diodes arranged side by side; And a light-transmitting waterproof cover that covers many light-emitting diodes.

[0012] As described above, a plant grows by taking in carbon dioxide, which is a raw material for a photosynthetic reaction, from the stomata existing abundantly on the back of the leaf into the leaves of the carbon dioxide, and performing a photosynthetic reaction. The degree of opening of the pores on the back side of the leaf, which is an inlet for carbon dioxide, is increased by light of a predetermined color. Therefore, when the light of the predetermined color is intensively applied to the back surface of the leaf of the plant, the degree of stomatal opening increases, and at the same time, the amount of carbon dioxide taken up into the leaf increases, and the photosynthetic reaction becomes active. And growth is promoted.

Therefore, as described above, a large number of light emitting diodes of a desired emission color, a substrate having the multiple light emitting diodes juxtaposed, and a light-permeable waterproof cover for covering the large number of light emitting diodes on the substrate. Constitutes an artificial light source unit for cultivating plants and the like. Then, light of a desired color from a large number of light emitting diodes of the artificial light source unit is applied to growing and growing plants all day within a day, or daytime, nighttime, early morning, evening, etc. On the other hand, irradiation is performed from the ground side to the back surface of the leaves and the outer peripheral surface of the stem through a waterproof cover.

Thus, the cultivation of ornamental plants, vegetables, fruit trees and any other crops under the sunlight (including greenhouse cultivation, rainhouse cultivation, greenhouse cultivation and outdoor cultivation without covering material) Cultivation and organization in plant factories (including plant factories that are used in combination with sunlight), where growth is controlled (for example, suppression of stem elongation), growth is promoted, yield is increased, pests are controlled, or artificial light is used. In the cultivation of the cultured plant, it is possible to control the growth of ornamental plants, vegetables, fruit trees and any other crops (for example, suppression of stem elongation), promote the growth, increase the yield, and control pests.

Moreover, in this case, each of the light emitting diodes is covered with a light-transmitting waterproof cover. Therefore, even if it is sprayed, it can be used without causing a problem such as a short circuit.

(2) The second aspect of the present invention is an artificial light source unit for cultivating plants or the like according to the first aspect of the present invention, wherein all the light-emitting colors of a large number of light-emitting diodes are blue. And

As described above, a plant grows by taking in carbon dioxide, which is a raw material of a photosynthetic reaction, from the stomata existing abundantly behind the leaves and performing a photosynthetic reaction. The above-mentioned pores, which are the intakes of the chromium, are more effectively opened particularly when the light has a blue wavelength.

Therefore, if the blue light is intensively applied to the back of the leaves of the plant being cultivated, the degree of opening of the pores is effectively increased, and the amount of carbon dioxide taken into the leaves is reduced. Increase and the photosynthetic reaction is activated. Growth is effectively promoted.

(3) The invention of claim 3 The artificial light source unit for cultivating plants or the like according to the present invention is characterized in that, in the configuration of the invention of claim 1, all the light-emitting colors of a large number of light-emitting diodes are red. And

Many of the plants used in agricultural production, when cultivated under high-temperature conditions in summer or under low solar radiation in winter, have abnormally increased stem elongation and become so-called prostrate. Especially in the situation of cultivating seedlings, the prostrate seedlings
Poor growth after planting in the field, resulting in low productivity.

On the other hand, the elongation of the stalk of the plant is the ratio of the light of the red wavelength to the sum of the light of the red wavelength and the light of the far infrared wavelength in the light received by the plant. It is known that by increasing it, it can be suppressed.

Therefore, as described above, when the red light emitting diode is used, the ratio of the light of the red wavelength can be effectively increased without reducing the total amount of light received by the plant, and the plant can be effectively used. Elongation can be suppressed.

[0023] (4) According plants like cultivating artificial light source unit of the present invention of claim 4 is the configuration of the invention described in claim 1, all emission colors of the plurality of light emitting diodes, in the far infra-red It is characterized by having.

Many of the plants used in agricultural production grow abnormally when grown under high temperature conditions in summer or under low solar radiation in winter, resulting in a so-called prolonged state. Especially in the situation of cultivating seedlings, the prostrate seedlings
Poor growth after planting in the field, resulting in low productivity.

On the other hand, the elongation of the stalk of the plant is caused by the light of the far-infrared wavelength in the sum of the light of the red wavelength and the light of the far-infrared wavelength in the light received by the plant. It is known that the ratio can be suppressed by increasing the ratio.

Therefore, as described above, the use of the far-infrared light emitting diode can effectively increase the ratio of the far-infrared wavelength light without reducing the total amount of light received by the plant. Therefore, plant elongation can be effectively suppressed.

[0027] (5) In accordance plants like cultivating artificial light source unit of the present invention of claim 5 is the structure of the invention described in claim 1, that all emission colors of a number of light emitting diodes is a white color Features.

Many of the plants used in agricultural production, when cultivated under high-temperature conditions in summer or under low solar radiation in winter, have an abnormally increased stem elongation and become a so-called prolonged state. Especially in the situation of cultivating seedlings, the prostrate seedlings
Poor growth after planting in the field, resulting in low productivity.

On the other hand, the elongation of the stalk of the plant is caused by the white wavelength occupying the sum of the red wavelength light, the far infrared wavelength light, and the white light in the light received by the plant. It is known that it can be suppressed by increasing the ratio of light.

[0030] Therefore, as described above, the use of white color of the light-emitting diodes without reducing the total quantity of plants received and it is possible to increase the ratio of light effectively white wavelength, effectively plant Elongation can be suppressed.

(6) The invention according to claim 6 In the artificial light source unit for cultivating plants or the like according to the present invention, in the configuration of the invention according to claim 1, the emission colors of a large number of light emitting diodes are a combination of blue and red. It is characterized by.

The plant grows by taking in carbon dioxide, which is a raw material of a photosynthetic reaction, into the leaves from the stomata existing abundantly behind the leaves, and performing a photosynthetic reaction. The pores serving as the carbon dioxide intake are more effectively opened when blue and red light are combined. Therefore, when blue and red light are intensively applied to the back of the plant leaf, the degree of opening of the stoma is particularly effectively increased, and at the same time, the amount of carbon dioxide taken into the leaf is effectively increased, The photosynthetic reaction is more activated. As a result, plant growth is further promoted.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) FIGS.
1 shows a configuration and a use state of an artificial light source unit for cultivating a plant or the like according to Embodiment 1 of the present invention.

First, in FIGS. 1 to 5, reference numeral 1 denotes the artificial light source unit. The artificial light source unit 1 supports a large number of light-emitting diodes 12, 12,... In parallel in a longitudinal direction in two rows, and includes a base 11 provided with a lighting drive circuit therein. On the upper part of the base 11, the light emitting diodes 12, 12,.
The lighting drive circuit is connected to a light emission control device 2, a timer 3, and a power plug 4 via a power cable 5.

In this embodiment, all of the light-emitting diodes 12, 12,... On the base 11 are constituted by, for example, monochromatic blue light-emitting diodes having a peak wavelength of about 450 nm. And they are, for example, in FIG.
As shown in FIG. 4, along the longitudinal direction of the ridge-shaped medium A of the plants a, a,. They are arranged in two rows at a predetermined pitch P so as to be staggered.

In the case of this embodiment, the width W of the substrate 11 in the front-rear direction is, for example, as shown in FIG.
The plants a, a, a, a, a, a,
can be arranged without difficulty in the center of the ground part between a,..., and as shown in FIG. 1, the plants a, a, a, a, a, a,. The size is set so that the light B having the blue wavelength can be efficiently irradiated from the lower side to the back surface of the leaf having the pores. And for that purpose, the above-mentioned light emitting diodes 12, 12.
In FIG. 5, for example, as shown in FIG. 5, the lamp axes (optical axes) 12a, 12a are vertical axes OO 'by predetermined angles θ, θ, respectively.
It is installed on the upper surface of the base 11 so as to be inclined in each of the front and rear directions.

On the other hand, the artificial light source unit 1 configured as described above is located at the center of the ground on the culture medium A, for example, as shown in FIGS.
When the AC power supply (1) is installed via the power cable 5 and the power plug 4 with the
00V / 200V). Then, in the state of being connected to the AC power source, the light emission amount adjusting device 2 operates to supply a voltage value (or a current value) supplied to the lighting drive circuit of each of the light emitting diodes 12, 12,. The size of the light emission (luminous intensity) is controlled by controlling the size of the plants a, a,.
Is the light emitting diode 1 within one day (24 hours).
The ideal growth state of the plants a, a... Is realized by appropriately controlling the lighting times and lighting times of 2, 12,.

The artificial light source unit for cultivating a plant or the like according to the present embodiment configured as described above is more specifically
Any plant cultivation performed under sunlight (including greenhouse cultivation, rain protection cultivation, greenhouse cultivation and outdoor cultivation without coating material), as well as plants cultivated under artificial light without sunlight It can be used to grow ornamental plants, vegetables, fruit trees and any other crops in factories (including plant factories that combine with sunlight) and tissue culture plants.

Thus, the following conventional problems in cultivation of plants and the like can be effectively solved.

In general, plants grow by performing a photosynthetic reaction using light as an energy source. However, under conditions of low solar radiation, photosynthesis is reduced, resulting in poor growth. Conventionally, there have been cases where a discharge lamp is used for the purpose of supplementing the amount of solar radiation under the condition of a small amount of solar radiation. However, discharge lamps generate heat at the same time as light emission,
The plant could not be irradiated from a short distance, so that the amount of light that did not hit the plant and diffused to the surroundings was large, resulting in poor energy use efficiency.

However, the light emitting diodes 12, 12
.. Emit light of a blue wavelength effective for photosynthesis from a shorter distance and have less heat dissipation, and thus have a beneficial effect on supplementing the amount of solar radiation.

Many of the plants used in agricultural production are
When cultivated under high temperature conditions in summer or low solar radiation amount in winter, the amount of elongation of the stem increases abnormally, resulting in a so-called procrastination state. In particular, in a situation where seedlings are cultivated, the prostituted seedlings grow poorly after being planted in the field, and become strains with low productivity. The artificial light source unit 1 having the above configuration is also effective for replenishing the amount of solar radiation in such a case.

Furthermore, many of the plants used in the agricultural production are caused by the occurrence of mold that inhibits growth during the cultivation period.
Growth may deteriorate and productivity may drop significantly.
Therefore, pesticides are used in actual production. However, recently, there has been an increasing number of cases in which the use of pesticides has been refrained from the use of pesticides due to the rising voice of consumers who are concerned about the adverse effects on the environment and the human body. Therefore, it is important to develop a pest control technology that does not use pesticides.

In this regard, it has been clarified that light having a blue wavelength suppresses the generation of mold. According to the artificial light source unit 1, the mold generated in such growing plants can be effectively controlled. can do.

In addition, when a light source device that has not been waterproofed as in the prior art is installed in a medium or a land area where plants are planted, a short circuit occurs due to rainwater or irrigation applied to the light source. It is a danger. However, the artificial light source unit 1 can be used without any problem because the waterproof cover is provided.

(Embodiment 2) The above-mentioned Embodiment 1
, The emission color of all of the large number of light emitting diodes 12, 12... Arranged in the front and rear two rows is configured to have a blue wavelength. The wavelength can be changed to a red wavelength of about 660 nm.

Elongation of the stem of the plant can be suppressed by increasing the ratio of the light of the red wavelength to the sum of the light of the red wavelength and the light of the far infrared wavelength in the light received by the plant. It has been known.

Therefore, in order to suppress the elongation of the stem of the seedling, a film having a low transmittance of far-infrared light and a high transmittance of red light is provided immediately above the plant so that the plant receives light. A technique has been developed in which the ratio of red light to the total of red light and far-infrared light is increased to suppress stem elongation.
However, in the case of the film, the total amount of light received by the plant is reduced, and the elongation of the stem is not significantly suppressed as compared with the case where the film is not used. As a result, this technique has not yet been widely used.

However, as in the present embodiment, the monochromatic red light emitting diodes 12, 1 having a peak wavelength of about 660 nm are used.
When 2 is used, the ratio of light having a red wavelength can be effectively increased without reducing the total amount of light received by the plant.

(Embodiment 3) The above-described Embodiment 1
, The light-emitting diodes of the large number of light-emitting diodes 12, 12,... Arranged in the front and rear two rows are configured to emit light of blue wavelengths. It can also be changed to that of light of the wavelength.

This configuration is also effective for appropriately suppressing plant elongation, as in the case of the second embodiment.

(Embodiment 4) The above-described Embodiment 1
, The light emitting diodes of all of the large number of light emitting diodes 12, 12... Arranged in the front and rear two rows are configured to emit light of a blue wavelength. It can be changed to the light of the wavelength of.

This configuration is also effective in appropriately suppressing plant elongation, as in the case of the second embodiment.

(Embodiment 5) The above-described Embodiment 1
, The emission color of all of the large number of light-emitting diodes 12, 12... Arranged in the two rows before and after is constituted by light of blue wavelength. .. May be of a two-color combination type in which the diodes 12, 12,... Are alternately arranged for a blue wavelength (around 450 nm peak wavelength) and a red wavelength (around 660 nm peak wavelength).

The plant grows by taking in carbon dioxide, which is a raw material for the photosynthetic reaction, from the stomata existing abundantly behind the leaves into the leaves of the photosynthetic reaction, and performing the photosynthetic reaction. The degree of opening of the pore serving as the carbon dioxide intake port is particularly increased when light having a blue wavelength and light having a red wavelength are combined. Therefore, when the light of the blue wavelength and the light of the red wavelength as described above are concentratedly applied to the back of the leaves of the plant, the degree of opening of the pores is particularly effectively increased, and at the same time, the carbon dioxide in the leaves is increased. Is effectively increased, and the photosynthetic reaction is more activated. As a result, its growth is further promoted.

(Experimental example) Tomatoes were cultivated using the blue light source unit 1 of the first embodiment and the red light source unit 1 of the second embodiment. The growth is strong even under the bottom, the elongation of the stem can be sufficiently suppressed, and there is no occurrence of mold,
It has become healthy. The graph of FIG. 6 shows the effect of blue and red supplementary light during the day and the effect of blue light irradiation at night on the growth of tomato grown in a greenhouse under natural light (treatment period: 27 days from cotyledon development).
Are respectively shown.

In the light conditions on the horizontal axis of FIG. 6, “blue day” is an example of supplementary light with blue light in the daytime, “natural” is an example without supplementary light in the daytime, and “blue night” is a case of nighttime light. And "red daylight" indicates an example of supplementary light by red light during daytime.

[Brief description of the drawings]

FIG. 1 is a front view showing a use state of an artificial light source unit for cultivating plants or the like according to Embodiment 1 of the present invention.

FIG. 2 is a plan view of the same use state.

FIG. 3 is a front view of the artificial light source unit for cultivating plants or the like according to Embodiment 1 of the present invention in a partially cut-out state.

FIG. 4 is a plan view of the artificial light source unit in a partially cut-away state.

FIG. 5 is a sectional view of a main part of the artificial light source unit.

FIG. 6 is a graph showing the cultivation results of the respective embodiments in which the emission color of the artificial light source unit is changed.

[Description of Signs] 1 is an artificial light source unit, 2 is a light emission control device, 3 is a timer, 5 is a power cable, 11 is a base, 12 is a light emitting diode, 13 is a waterproof cover, A is a plant culture medium, and B is light. ,
a is a plant.

Claims (6)

[Claims] 1. A light-emitting device comprising: a plurality of light-emitting diodes of a desired emission color; a base on which the plurality of light-emitting diodes are juxtaposed; and a light-permeable waterproof cover for covering the plurality of light-emitting diodes on the base. An artificial light source unit for cultivating plants or the like, characterized in that: 2. The artificial light source unit for cultivating plants and the like according to claim 1, wherein all of the light emitting diodes emit blue light. 3. The artificial light source unit for cultivating plants or the like according to claim 1, wherein all of the light emitting diodes emit red light. 4. The artificial light source unit for cultivating plants or the like according to claim 1, wherein all of the light emitting diodes emit red light. 5. The artificial light source unit for cultivating plants or the like according to claim 1, wherein all of the light-emitting colors of the plurality of light-emitting diodes are far-infrared colors. 6. The artificial light source unit for cultivating plants or the like according to claim 1, wherein the light emitting colors of the plurality of light emitting diodes are a combination of blue and red.