KR20210033754A - Plant cultivation apparatus and plant cultivation method using light source for plant cultivation - Google Patents

Abstract

The present invention relates to a plant cultivation apparatus comprising: a housing providing a space for plants to grow; a light source provided within the housing and irradiating the plants with light; an illuminance sensor detecting illuminance of the space within the housing; and a control unit controlling the amount of light of the light source, wherein the light source includes a first light source emitting white light and a second light source emitting blue light, and the control unit is connected to the illuminance sensor and receives light information from the illuminance sensor to control the on/off of the light source and the amount of light. In addition, the plant cultivation apparatus is capable of improving yield.

Description

Plant cultivation device and plant cultivation method using a light source for plant cultivation {PLANT CULTIVATION APPARATUS AND PLANT CULTIVATION METHOD USING LIGHT SOURCE FOR PLANT CULTIVATION}

The present invention relates to a plant cultivation apparatus and a plant cultivation method using a light source for plant cultivation.

Recently, in plant cultivation, a method using a light-emitting diode (LED) emitting a light wavelength in a specific region has been used. The plant cultivation method using LED consumes less power than incandescent lamps or fluorescent lamps, and is an efficient method for plant cultivation as it can selectively irradiate the wavelength of a specific desired region excluding unnecessary wavelength regions.

In the case of plant factories that cultivate plants using such artificial light, the plant growth environment is different regardless of external climate change, compared to greenhouses or open fields where plant growth is influenced by changes in external climate conditions such as rainfall, high temperature, low temperature, and yellow sand. There is an advantage of being able to produce plants on purpose all year round under controlled conditions. Accordingly, the possibility of occurrence of diseases and pests is extremely small, and there is no need for expensive eco-friendly microbial preparations for controlling diseases and pests, and there is an advantage in that the production of environment-friendly plants is possible.

It is an object of the present invention to provide a plant cultivation apparatus and a plant cultivation method using a light source for plant cultivation capable of improving the live weight and dry weight by controlling the irradiation amount of an artificial light source according to the amount of sunlight caused by external climate change. It is in the offering.

In addition, it is an object of the present invention to provide a plant cultivation apparatus and a plant cultivation method using a light source for plant cultivation that can improve the yield by controlling the flowering time and the occurrence time of bolstering of the plant to extend the harvest period of the plant. .

A plant cultivation apparatus according to an embodiment of the present invention includes a housing providing a space in which plants are grown; A light source provided in the housing and irradiating light to the plant; An illuminance sensor for sensing illuminance of the space in the housing; And a control unit for controlling the amount of light of the light source, wherein the light source includes a first light source for emitting white light and a second light source for emitting blue light, and the control unit is connected to the illuminance sensor to receive light information from the illuminance sensor. It controls the on/off and the amount of light.

In one embodiment of the present invention, the wavelength of light emitted from the first light source is 380 nm to 780 nm.

In one embodiment of the present invention, the wavelength of light emitted from the second light source is 450 nm to 495 nm.

In one embodiment of the present invention, intensity of light emitted from the light source is a 100μmolm ^-2 s ^-1 to 300μmolm ^-2 s ^-1.

In one embodiment of the present invention, the light source includes at least one light emitting diode.

In one embodiment of the present invention, the control unit controls the on/off of the light source according to the dark and bright periods set during the one-day period, and the bright period is provided to be maintained for 12 hours per day.

The plant cultivation apparatus according to an embodiment of the present invention further includes a complementary light source that emits red light.

In one embodiment of the present invention, the wavelength of light emitted from the complementary light source is 600 nm to 700 nm.

In an embodiment of the present invention, the interpolation intensity of light emitted from the interpolation light source is 0.1 μmolm ^-2 s ^-1 to 1.5 μmolm ^-2 s ^-1 .

In one embodiment of the present invention, the control unit independently controls the driving of the light source and the complementary light source.

In an embodiment of the present invention, the controller controls the on/off time of the complementary light source and the amount of light for each time slot based on the sunrise and sunset times.

In one embodiment of the present invention, the control unit extends the harvesting period by controlling the flowering time of the plant or the occurrence time of the propulsion by adjusting the on/off and the amount of light of the light source and the complementary light source according to the growing state of the plant.

Plant cultivation apparatus according to an embodiment of the present invention, a height adjuster for adjusting the irradiation height of the light source; And an angle adjuster for adjusting the irradiation angle of the light source.

In an embodiment of the present invention, the plant is at least one of kale, Chinese cabbage, bok choy, broccoli, rapeseed, sweet vegetables, kohlrabi, rocket, turnip, red radish, peas, barley, flax, and beans.

Plant cultivation apparatus according to an embodiment of the present invention, provided in the housing, soil medium in which plants are grown; And it further comprises a nutrient solution providing unit for providing a nutrient solution to the soil medium.

A light source for plant cultivation according to an embodiment of the present invention is provided in a housing including a space in which plants are cultivated, and has a wavelength of 380 nm to 780 nm, and emits white light in a light source for plant cultivation that irradiates light to the plants. A first light source; And a second light source having a wavelength of 450 nm to 495 nm and emitting blue light, and an amount of light irradiated to the plant and on/off is controlled based on light information detected from an illuminance sensor provided in the housing.

The light source for plant cultivation according to an embodiment of the present invention includes at least one light emitting diode.

Light emitted from the light source for plant cultivation according to one embodiment of the present invention, has a light intensity of 100μmolm ^-2 s ^-1 to 300μmolm ^-2 s ^-1.

Plant cultivation method according to an embodiment of the present invention, the steps of providing a housing having a space in which plants are grown; Sensing the illuminance of the space by an illuminance sensor provided in the housing; Controlling on/off and light amount of a light source including a first light source for irradiating white light and a second light source for irradiating blue light, based on the light information sensed from the illuminance sensor; And irradiating the plant with light from a light source.

The plant cultivation method according to an embodiment of the present invention further includes irradiating light to the plant from a complementary light source that irradiates red light based on light information, sunrise and sunset times.

In the plant cultivation method according to an embodiment of the present invention, the harvest period is extended by controlling the flowering time of the plant or the occurrence time of the propulsion by controlling the on/off and the amount of light of the light source and the complementary light source according to the growing state of the plant.

When using the plant cultivation apparatus and the light source for plant cultivation according to an embodiment of the present invention, by controlling the irradiation amount of the artificial light source according to the amount of sunlight caused by external climate change to promote the growth of plants, it is possible to improve the living weight and dry weight. It works.

In addition, when the plant cultivation apparatus and the light source for plant cultivation according to an embodiment of the present invention are used, there is an effect of improving the yield by prolonging the harvest period of the plant by controlling the flowering time and the occurrence time of the plant. .

1 shows a plant cultivation apparatus according to an embodiment of the present invention.
Figure 2a shows a light source for plant cultivation according to an embodiment of the present invention.
2B shows a light source and a complementary light source according to an embodiment of the present invention.
3A is a graph showing lobe live weight by light quality.
Figure 3b is a graph showing the amount of pigment synthesis in the lobe by light quality.
4A is a graph showing leaf dry weight according to light intensity.
Figure 4b is a graph showing the amount of pigment synthesis in the leaf according to the light intensity.
5A is a graph showing live weight by hydroponic cultivation method.
Figure 5b is a graph showing the average daily leaf yield for each hydroponic cultivation method.
6A is a graph showing the lobe live weight according to the treatment group.
6B is a graph showing the yield per individual week of Bogwang-gu R630.
6C is a graph showing the yield per individual week of Bogwang-gu R660.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, only the present embodiments are intended to complete the disclosure of the present invention, and common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have, and the invention is only defined by the scope of the claims.

The present invention relates to a plant cultivation apparatus and a plant cultivation method using a light source for plant cultivation.

Plants photosynthesize using light in the visible wavelength band, and obtain energy through photosynthesis. Photosynthesis in plants is not done to the same extent in all wavelength bands. Among sunlight, light in the wavelength band used by plants for photosynthesis occupies a part of the solar spectrum, and corresponds to a band of about 400 nm to about 700 nm.

The plant cultivation apparatus according to an embodiment of the present invention is an invention for promoting plant growth by appropriately mixing and irradiating light in the above-described wavelength band region.

Hereinafter, the basic configuration of the plant cultivation apparatus of the present invention will be described.

1 shows a plant cultivation apparatus according to an embodiment of the present invention.

Referring to FIG. 1, a plant cultivation apparatus 10 according to an embodiment of the present invention includes a housing 100 providing a space in which plants are cultivated, a light source provided in the housing 100 and irradiating light to the plants ( 200), an illuminance sensor 300 that senses illuminance of the space inside the housing 100, and a controller 400 that controls the amount of light of the light source 200.

First, the housing 100 is for forming a space for growing plants, and may be provided in the form of a plant factory such as a greenhouse. The shape of the housing 100 is not limited to the above, and may be provided in various forms. Although not completely, the housing 100 may be in a closed form in which air from outside is blocked, or at least a part may be open and the rest may be closed.

Plants to be cultivated are arranged in the housing 100. The plant is not particularly limited as long as it can be cultivated with a plant cultivation device. The plant may be an edible vegetable. For example, it may be kale, cabbage, bok choy, broccoli, rapeseed, sweet vegetable, kohlrabi, rocket, turnip, red radish, peas, barley, flax, beans, etc., but is not limited thereto. The plant may be grown in a way that photosynthesis is performed using light emitted from a light source.

In one embodiment of the present invention, the plant may be cultivated hydroponic or terrestrial.

Subsequently, a light source 200 for irradiating light to the plant is provided inside the housing 100.

Figure 2a shows a light source for plant cultivation according to an embodiment of the present invention.

1 and 2A, the light source 200 of the present invention includes a first light source 201 that emits white light and a second light source 202 that emits blue light.

In an embodiment of the present invention, the wavelengths of the first light source 201 and the second light source 202 may be wavelengths corresponding to visible light. For example, in an embodiment of the present invention, the wavelength of light provided from the first light source 201 may be provided in a range of about 380 nm to about 780 nm, and the wavelength of light provided from the second light source 202 is about 450 nm. To about 495 nm.

The first light source 201 and the second light source 202 may provide light of various intensities according to various conditions in the housing 100, for example, a type of plant or a temperature in the housing 100. For example, the amount of light required for photosynthesis may vary depending on the plant, and accordingly, the amount of emitted light may vary. In one embodiment of the present invention, the intensity of light emitted from the first light source 201 and / or the second light source 202 may be about 100μmolm ^-2 s ^-1 to about 300μmolm ^-2 s ^-1. Alternatively, the intensity of light emitted from the first light source 201 and/or the second light source 202 may be ^{about 200 μmolm -2} s ^-1 to about 250 μmolm ^-2 s ^-1.

In particular, in an embodiment of the present invention, when the plant grown in the housing 100 is kale, it may be ^{200 μmolm -2} s ^-1 or 250 μmolm ^-2 s ^-1. In one embodiment of the present invention, when the plant is a kale that is hydroponic cultivation, compared to the luminosity of other light, when 200 μmolm ^-2 s ^-1 or 250 μmolm ^-2 s ^-1 is provided, live weight and dry weight increase. For example, compared to when the light intensity is 150 μmolm ^-2 s ^{-1 , when the light intensity is 200 μmolm -2} s ^-1 or 250 μmolm ^-2 s ^-1 , the live weight and dry weight may increase by 50% or more. Details of the related light intensity comparison experiment will be described later.

The light source 200 may be provided in a form including at least one light emitting diode (LED).

In FIG. 2A, the light source 200 is illustrated in the form of one component including one first light source 201 and one second light source 202, but is not limited thereto, and the inside of the housing 100 A plurality of light sources 200 may be provided, and one light source 200 may include a plurality of first light sources 201 and a plurality of second light sources 202.

For example, it may be provided in the form of a plurality of light sources 200 including a first light source 201 provided with a plurality of diodes and a second light source 202 provided with a plurality of diodes. In this case, the first light source 201 and the second light source 202 may be provided in a form in which a light emitting diode emitting light in a white wavelength band and a light emitting diode emitting light in a blue wavelength band are mixed. In this case, by independently driving the first light source 201 and the second light source 202, a ratio of white light and blue light may be controlled by respectively adjusting the amount of white light and blue light emitted.

In addition, the light source 200 may be configured in a form in which a plurality of light emitting diodes that simultaneously emit light in a white wavelength band and a blue wavelength band are mixed.

The form of providing the light source 200 is not limited to the above-described example, and may be provided in various forms.

Subsequently, the illuminance sensor 300 is provided in the housing 100 to detect illuminance of a space in which plants are grown.

Referring back to FIG. 1, the illuminance sensor 300 may be provided to detect sunlight and the amount of light emitted from the light source 200, and transmits such light information to the controller 400 to be described later. For example, when the housing 100 is closed, the illuminance sensor may detect the illuminance of light emitted from the first and second light sources in the housing 100, and at least a part of the housing 100 is open. In the case of daytime, it is possible to detect the illuminance of light and/or sunlight emitted from the first and second light sources.

The controller is electrically connected to the first and second light sources and the illuminance sensor, and controls the first and/or second light sources, and the illuminance sensor.

The light information may be expressed as a sum of illuminance due to sunlight and illuminance detected by the light source 200. The control unit may be provided to adjust the amount of emission of the light source 200 based on the sensed total illuminance value of the space in the housing 100.

Subsequently, the controller 400 is connected to the illuminance sensor 300 to receive light information from the illuminance sensor 300 to control on/off of the light source 200 and the amount of light. The control unit 400 may be provided inside the housing 100 to automatically control the light source 200, and may be provided to control the light source 200 manually or remotely from the outside of the housing 100.

The controller 400 may control the on/off of the light source 200 according to a dark period and a bright period set during a day period in a method of on-off control of the light source 200. The bright cycle may be provided to be maintained for about 12 hours per day on average, and may be preset to be different from month to month depending on the season. In addition, the light cycle may be set differently according to the type of plant, and may be set to alternate with each other in units of 24 hours a day. For example, the dark cycle may be maintained for about 5 hours to about 10 hours, and then the light cycle may be maintained for about 19 hours to about 14 hours, and the dark cycle and the light cycle may be set to repeat on a daily basis. .

In addition, the controller 400 may control the amount of light irradiated from the light source 200 so that the total illuminance value is kept constant based on the illuminance measured value for each time period received from the illuminance sensor 300 described above. Accordingly, the amount of light emitted from the light source 200 may be gradually decreased or increased while gradually turning on or blinking.

The method of on/off and controlling the amount of light of the light source 200 may be applied alone or at the same time.

Although not shown, a power supply may be connected to at least one of the first and second light sources, the controller, and the illuminance sensor, and the controller receives power from the power supply to receive the illuminance sensor and the first and second light sources. Can drive.

When the plant cultivation apparatus according to the embodiment of the present invention is used as described above, the living weight of the leaf is increased, and potassium and calcium components are increased. In addition, there is an effect of reducing the growth inhibition of plants caused by the decrease in the amount of light in the facility caused by climate change such as rainfall and short days.

Accordingly, it is possible to provide a constant growth environment throughout the year regardless of external climate change and season, thereby preventing the occurrence of diseases and pests, and has the effect of planning and stably producing plants.

The plant cultivation apparatus according to an embodiment of the present invention may be provided to further include the following configuration.

The plant cultivation apparatus according to an embodiment of the present invention may further include a complementary light source that emits red light.

2B shows a light source and a complementary light source according to an embodiment of the present invention.

Referring to FIGS. 1 and 2B, the complementary light source 250 functions as an auxiliary light source 200 when the amount of light irradiated to the plant is insufficient due to lack of sunlight during the bright period or during the daytime.

For example, when crops are grown depending on natural light in a cultivation facility such as a greenhouse, a separate complementary light source 250 that emits red light is used to light up when the amount of light in the facility decreases, thereby promoting plant growth.

The wavelength of light emitted from the complementary light source 250 may correspond to red light among visible rays. For example, the wavelength of the compensation light source 250 according to an embodiment of the present invention may be about 600 nm to about 700 nm. The intensity of light emitted from the complementary light source may vary depending on various conditions, for example, the degree of lack of sunlight. In an embodiment of the present invention, the intensity of light emitted from the interpolation light source 250, that is, the interpolation light, may be about 0.1 μmolm ^-2 s ^-1 to about 1.5 μmolm ^-2 s ^-1 .

The compensation light source 250 may be controlled by the control unit 400 described above.

The controller 400 may independently control the driving of the light source 200 and the complementary light source 250. For example, the controller may control in various ways, such as turning on only the light source, turning off the compensating light source, turning on or off the light source and the compensating light source at the same time, turning off the light source and turning on the compensating light source. In addition, the controller may control an on/off time of the compensation light source 250 and an amount of light for each time slot based on the sunrise and sunset times.

In addition, the controller 400 may control the flowering time of the plant or the time of occurrence of the propulsion by adjusting the on/off and the amount of light of the light source 200 and the complementary light source 250 according to the growing state of the plant. Here, bolus refers to a flower stem formed when a plant is converted from a vegetative growth stage to a reproductive growth stage, and when flowering and bolus occurs, the production of leaves of the plant is stopped.

However, when the red light of the present invention is used as a complementary light source, it becomes possible to prolong the growth time of leaves by delaying the time of flowering and bolstering. Accordingly, by extending the period of harvesting leaves of the plant, it is possible to harvest leaves of excellent quality with improved fresh weight, and the yield is also improved.

In addition, the plant cultivation apparatus according to an embodiment of the present invention may further include a height adjuster for adjusting the irradiation height of the light source and an angle adjuster for adjusting the irradiation angle of the light source.

For example, it may be provided so that the height of the light source is adjusted by a light source or a beam height adjuster according to an increase in the plant height of the plant.

In addition, in consideration of the size of the plant community and its increase, it may be provided so that the angle of the light source or the complementary light source is adjusted by an angle adjuster to irradiate light from the side of the plant.

In addition, the plant cultivation apparatus of the present invention is applicable to both terrestrial or hydroponic cultivation, and the plant cultivation apparatus according to an embodiment of the present invention is provided in a housing and provides nutrient solution to the soil medium and the soil medium in which the plants are grown. It may further include a nutrient solution providing unit.

Accordingly, there is an advantage that can be applied to cultivation of various types of plants without being bound by the cultivation method according to the plant species.

For example, the plant cultivation apparatus of the present invention can be used for cultivation of at least one plant among kale, Chinese cabbage, bok choy, broccoli, rapeseed, multichae, kohlrabi, rocket, turnip, red radish, pea, barley, flax, and beans. .

In particular, kale belongs to a plant with a relatively long plant length, so it is sown and seeded 2-3 times a year, so that leaves can be harvested for up to 6 months out of the year, except for high temperatures and seedling periods. In addition, there is a problem of sluggish growth and a decrease in yield due to low temperatures in autumn and winter, and in the high temperature period, the leaf yield decreases due to the occurrence of bolting, and the occurrence of diseases and pests increases, making cultivation difficult. In addition, there is a problem in that the production cost burden of farmers is high due to the use of expensive microbial agents for controlling diseases and pests.

However, when the plant cultivation apparatus of the present invention is used, unlike greenhouse or field cultivation, long-term cultivation of about 10 months or more is possible with one seeding, thereby extending the leaf harvest period and reducing seedling costs.

In addition, it is possible to harvest leaves without being affected by external low or high temperatures, and there is an advantage that expensive eco-friendly microbial preparations for controlling diseases and pests are unnecessary, and there is an effect of simplifying the cleaning operation after harvesting leaves.

In the above, a plant cultivation apparatus and a plant cultivation method using a light source for plant cultivation have been described.

Hereinafter, examples will be described to aid understanding of the present invention. The following examples are provided for easier understanding of the present invention, and the contents of the present invention are not limited by the examples.

Example

The following shows the results of kale cultivation experiments using the plant cultivation method using artificial light of the present invention.

The following examples are all performed on kale, and in graphs referred to for better understanding of explanation, for convenience, Plant is shown as kale, and Leaf is shown as a leaf (leaf) of kale.

1. Comparison of changes in leaf weight according to light quality

3A is a graph showing the lobe live weight by light quality, and FIG. 3B is a graph showing the amount of pigment synthesis in the lobe by light quality.

In FIG. 3A, the x-axis represents the light quality, and the y-axis represents the fresh weight (g) per week of kale with respect to the light quality.

In FIG. 3B, the x-axis represents the light quality, and the y-axis represents the amount of pigment synthesis in the leaf (SPAD value). The amount of pigment synthesis was measured using SPAD-502 PLUS of KONICA MINOLTA, which is a SPAD (Soil Plant Analysis Development) equipment.

The light quality was provided as LED mixed light, and each mixed light was expressed in the following terms. FLBW is a mixture of blue and white LEDs and fluorescent lamps, BRW is a mixture of blue, red, and white lights, and BW is a mixture of blue and white LEDs.

Referring to FIG. 3A, it was confirmed that the fresh weight (g) per week was 10% higher than that of the kale irradiated with the mixed light quality of blue and white LEDs, compared to the kale irradiated with the mixed light quality of the red, blue and white LED. Referring to FIG. 3B, in the case of the amount of pigment synthesis in the lobe according to the mineral quality, it was found that the effect according to the type of the mineral was negligible.

2. Comparison of pigment synthesis rate in dry weight and leaf according to light intensity

Figure 4a is a graph showing the dry weight according to the light intensity, Figure 4b is a graph showing the amount of pigment synthesis in the leaf according to the light intensity.

In FIGS. 4A and 4B, the x-axis represents light intensity, and the light intensity is set in three stages: L (low), M (middle), and H (high). L(low) means a light intensity of ^{150 μmolm -2} s ^{-1 , M (middle) means 200 μmolm -2} s ^-1 , and H(high) means 250 μmolm ^-2 s ^-1 Means. The light quality was provided by two types of LED mixed light, and each mixed light was expressed in the following terms. FLBW is a mixture of blue and white light and a fluorescent light, and BRW is a mixture of blue, red, and white light.

In the case of Fig. 4a, the y-axis represents total dry weight (g), and in the case of Fig. 4b, it represents the amount of pigment synthesis in the leaf (SPAD value).

Experimental results Referring to Figure 4a, for controlling the light intensity of each light source in ^{150μmolm -2 s -1, 200μmolm -2 s} -1, and 250μmolm ^-2 s ^-1 in light quality (FLBW, BRW) condition of two In the case, leaf fresh weight and dry weight were found to be maximum in the condition of ^{light intensity of 250 μmolm -2} s ^{-1 for both minerals.} However, ^{compared with the light intensity of 200 μmolm -2} s ^-1, the difference in growth was not found to be significant.

Referring to Figure 4b, in the case of the pigment synthesis in the leaf, the difference according to the light quality and light intensity is shown to be very insignificant, when considering the electric energy consumption and light source cost ^{, controlling the light intensity to 200 μmolm -2} s ^-1 reduces the input energy Has been found to be effective.

Remark FLBW BW BRW Power consumption by light quality (W) FL B W B W B R W 14 17.6 16.5 17.6 16.5 17.6 16 16.5 Power consumption (W) 511.9 358.6 444.6 12 hours of irradiation
Total power consumption (KWh/day) 6.1 4.3 5.3 FLBW (15.1% increase)> BRW, BRW (23.3% increase)> BW

Table 1 shows the power consumption by light quality based on light intensity of 100 μmolm ^-2 s ^-1.

Referring to Table 1, as a result of comparing the power consumption (W) for each light quality, it was confirmed that the power consumption was in the order of the largest FLBW>BRW>FW. That is, it was confirmed that the case of using the BW (blue and white LED) light quality as in the present invention is the most efficient in terms of power consumption.

3. Comparison of fresh weight and leaf yield according to hydroponic cultivation method

Figure 5a is a graph showing the live weight of each hydroponic cultivation method, Figure 5b is a graph showing the average daily leaf yield for each hydroponic cultivation method.

5A and 5B, the x-axis represents the cultivation method, and a spray hydroponic method (Aeroponics) and a thin film hydroponic method (NFT: Nutritional film technique) were used. In the case of Figure 5a, the y-axis represents the live weight per week (g), in Figure 5b represents the average daily leaf yield per week.

Referring to Figure 5a, in the case of kale using the spray hydroponic method (Aeroponics) under the same conditions of temperature, humidity, and light intensity, the leaf weight per week is about 38 times larger than that of the thin film hydroponic method (NFT: Nutritional film technique). It was confirmed that the petiole was found to be about 49% larger.

Referring to Figure 5b, it was confirmed that the average daily leaf yield per week was increased by about 11% in the spray hydroponic method compared to the thin film hydroponic method.

Through this, it was confirmed that the spray hydroponic method was more effective than the thin film hydroponic method in order to improve the live weight per week and the average daily leaf yield per week.

4. Artificial light beam compensation method

(1) Power consumption according to the compensation light source and light intensity

Light source: three-wavelength lamp (3W), sodium lamp (Na) and no beam light bulb (NL, natural light bulb)

Beam intensity: 0.1 (10 Lux), 0.6 (50 Lux) and 1.2 (100 Lux) μmolm ^-2 s ^-1

Light source type Red LED
(10 lux) Red LED
(50 lux) Red LED
(100 lux) Three wavelength light
(1,000 lux) Sodium, etc.
(1,000 lux) Power consumption
(Watt) 12 18 24 75 100

Table 2 shows the power consumption for each light source.

Referring to Table 2, the beam intensity for each wavelength is 0.1 (10 Lux) μmolm ^-2 s ^-1 , 0.6 (50 Lux) μmolm ^-2 s ^-1 and 1.2 (100 Lux) μmolm ^-2 s ^-1 , which are 3 levels. Was provided.

(2) Details of compensation

The following shows the contents of the interpolation according to the interpolation light source. The intensity of light was based on 5,000 lux, and the interpolation light source was set to be irradiated in consideration of the monthly sunrise and sunset times.

In addition, when the illuminance sensor measures the intensity of light in the greenhouse in real time and falls below a preset amount of sunlight, it is set to use a complementary light source.

In this case, a method of controlling the lighting and blinking of the compensation light source was applied to maintain the light intensity arbitrarily set when the lack of sunlight during the daytime persists for a certain period of time due to the influence of rainfall and clouds.

Treatment Complementary light source Beam time NL No-both light (natural light) - 3W Three wavelength light 1) Real-time flashing control for daytime flashing
-Greenhouse weekly set light intensity: 5,000 lux
2) Bogwang time at sunrise and sunset
-February-March: 6 h/d
-April to June: 3 h/d
-As of September~November: 6 h/d
3) Total power consumption during the light beam period (day + night)
-5,270 KWh Na Sodium, etc. R630 630nm red LED R660 660nm red LED

(3) Report light result

3-1) Bolting occurrence control

Bolting refers to a flower stem formed when a plant is converted from a vegetative growth stage to a reproductive growth stage. In the flower stalk formed by the bolting, leaves of a shape different from the leaves in the vegetative growth stage are sometimes made, and various kinds of inflorescences can be formed depending on the plant.

In the case of kale, the production of leaves is stopped or the harvest time is affected by the bolting, and the timing of such bolting can be adjusted through irradiation of a complementary light source.

Hereinafter, the light beam results using the treatment tools of Table 3 will be described.

In the experiment of the present invention, the occurrence of bolting was confirmed in the kale of a greenhouse using natural light bulbs (NL) and sodium (Na) beams around May, and when red 660nm 1.2μmolm ^-2 s ^-1 (100lux) beams were used, 6 Flowering and bolstering were observed from May.

However, in the greenhouse using the R630nm beam sphere, it was found that flowering and bolstering did not occur in all individuals, and it was confirmed that kale leaves can be harvested and shipped until August.

In other words, it was confirmed that it was possible to produce and harvest more leaves with excellent marketability by extending the harvesting time of leaves of kale through appropriate selection and control of the irradiation amount of the complementary light source.

Of the treatment tools indicated on the x-axis in the graphs of FIGS. 6a to 6c to be described later, R630 is represented by R630-10, R630-50, and R630-100, respectively, by indicating the illuminance provided differently from each other at the back. For example, R630-100 is a red light having a wavelength of about 630nm, which means that it is provided with an illuminance of 100Lux.

3-2) Side weight comparison

6A is a graph showing the live weight according to the treatment group, the x-axis shows the treatment group, and the y-axis shows the live weight per week (g).

Referring to Figure 6a, red LED 100 lux (R100)> red LED 50 lux (R50)> red LED 10 lux (R10)> three-wavelength lamp (3W)> natural light (NL) in the order of the irradiated kale, the live weight was large. In particular, it was confirmed that the fresh weight was about 1.5 times higher than that of the kale irradiated with natural light (NL) in the kale irradiated with a three-wavelength lamp (3W), sodium lamp (Na), and a 630nm red LED 100lux (R630-100). Of these, the live weight was the highest in sodium lamp (Na), but the difference between the three-wavelength lamp (3W) and red LED (R630-100) was not large, and the significance was not recognized.

Currently, R660 red light is formed at a higher price than R630, so it is considered that it is safe to use red light in the range of about 630nm to about 660nm.

In addition, in the case of the building, it was about 1.7 times higher in 3W, Na, and R630-100 than that of NL, which is a natural light, and the leaf length was about 1.2 times larger than that of NL, which is a natural light, in 3W and Na.

3-3) Comparison of yield

6b is a graph showing the yield per week of the R630 bogwang-gu, and FIG. 6c is a graph showing the yield per week of the R660 bogwang-gu.

In the graph of the figure, the x-axis represents the treatment zone, and the y-axis represents the average daily leaf yield per week.

Referring to FIG. 6B, in the case of the yield of kale irradiated with the R630 beam bulb, it was found to have the highest yield under the condition of 100 lux according to the light intensity, and the yield was high in the order of 50 lux and 10 lux.

As for the yield of kale for the whole bogwang-gu, the bogwang-gu of R630-100 showed a remarkably high yield, and the difference from 3W (three wave length, etc.), which had the second highest yield, was found to be significant, confirming that significance was recognized.

Subsequently, the R630-50 bogwang-gu showed a sharp difference from that of the R630-100 bogwang-gu, and a lower yield was recorded.

Next, referring to FIG. 6C, the yield of kale irradiated with the R660 beam beam was sequentially high in the conditions of 100 lux, 50 lux, and 10 lux as in the R630 beam beam.

However, compared to the R630-100 bogwang-gu, the R660-100 bogwang-gu recorded a small yield value with 3W (three wavelength lamp), and it was confirmed that the difference from the R660-50 bogwang-gu was also small.

In other words, it was confirmed that the R630 bogwanggu has more excellent efficiency in terms of the yield of kale compared to R660. Therefore, it was confirmed that the use of the beam beam of R630 can improve the leaf yield in the kale growing environment under the same conditions.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

10: plant cultivation device
100: housing
200: light source
201: first light source
202: second light source
250: complementary light source
300: illuminance sensor
400: control unit

Claims (21)

A housing providing a space in which plants are grown;
A light source provided in the housing and irradiating light to the plant;
An illuminance sensor for sensing illuminance of the space in the housing; And
It includes a control unit for controlling the amount of light of the light source,
The light source includes a first light source emitting white light and a second light source emitting blue light,
The control unit is connected to the illuminance sensor and receives light information from the illuminance sensor to control the on/off and amount of light of the light source. The method of claim 1,
A plant cultivation apparatus having a wavelength of light emitted from the first light source of 380 nm to 780 nm. The method of claim 1,
A plant cultivation apparatus having a wavelength of 450 nm to 495 nm of light emitted from the second light source. The method of claim 1,
Intensity of light emitted from the light source is 100μmolm ^-2 s ^-1 to 300μmolm ^-2 s ^-1 of plant cultivation device. The method of claim 1,
The light source is a plant cultivation apparatus comprising at least one or more light emitting diodes. The method of claim 1,
The control unit controls on/off of the light source according to a dark cycle and a light cycle set during a day cycle, and the light cycle is provided to be maintained for 12 hours per day. The method of claim 1,
Plant cultivation apparatus further comprising a complementary light source that emits red light. The method of claim 7,
Plant cultivation apparatus having a wavelength of 600nm to 700nm of light emitted from the complementary light source. The method of claim 7,
The beam intensity of the beam light source is 0.1 μmolm ^-2 s ^-1 to 1.5 μmolm ^-2 s ^-1 . The method of claim 7,
The control unit is a plant cultivation apparatus for independently controlling the driving of the light source and the complementary light source. The method of claim 7,
The control unit is a plant cultivation apparatus that controls the on/off time and the amount of light for each time slot of the compensation light source based on sunrise and sunset times. The method of claim 7,
The control unit is a plant cultivation apparatus for extending the harvest period by controlling the flowering time or the bolster generation time of the plant by adjusting the on/off and the amount of light of the light source and the complementary light source according to the growing state of the plant. The method of claim 1,
A height adjuster for adjusting the irradiation height of the light source; And
Plant cultivation apparatus further comprising an angle adjuster for adjusting the irradiation angle of the light source. The method of claim 1,
The plant, kale, Chinese cabbage, bok choy, broccoli, rapeseed, multichae, kohlrabi, rocket, turnip, red radish, peas, barley, flax, a plant cultivation apparatus of at least one of beans. The method of claim 1,
A soil medium provided in the housing and in which the plant is grown; And
Plant cultivation apparatus further comprising a nutrient solution providing unit for providing a nutrient solution to the soil medium. In the plant cultivation light source provided in a housing including a space in which plants are grown and irradiating light to the plants,
A first light source emitting white light having a wavelength of 380 nm to 780 nm; And
It includes a second light source emitting blue light having a wavelength of 450nm to 495nm,
A light source for plant cultivation in which the amount of light irradiated to the plant and on/off are controlled based on light information sensed from an illuminance sensor provided in the housing. The method of claim 16,
A light source for plant cultivation comprising at least one light emitting diode. The method of claim 16,
100μmolm ^-2 s ^-1 to 300μmolm ^-2 s ^-1 of Horticulture light source having a light intensity. Providing a housing having a space in which plants are grown;
Sensing the illuminance of the space by an illuminance sensor provided in the housing;
Controlling on/off and light amount of a light source including a first light source for irradiating white light and a second light source for irradiating blue light, based on the light information detected by the illuminance sensor; And
Plant cultivation method comprising the step of irradiating light to the plant from the light source. The method of claim 19,
The plant cultivation method further comprising the step of irradiating light to the plant from a complementary light source that irradiates red light based on the light information, sunrise and sunset times. The method of claim 20,
Plant cultivation method of extending the harvesting period by controlling the flowering time or the bolster generation time of the plant by adjusting the on/off and the amount of light of the light source and the complementary light source according to the growing state of the plant.

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