TWI474777B - Plant growth apparatus, system and method thereof - Google Patents

Description

Plant growth device, system and method thereof

The present invention relates to a plant growth apparatus, and more particularly to a plant growth apparatus, system and method therefor.

The greenhouse is mainly a confined environment built to provide the optimum humidity, temperature and light required for photosynthesis; the greenhouse generally has transparent roofs and walls to form a closed environment that is isolated from the outside world. Controlling the humidity, temperature and light source of the entire greenhouse allows the plants in the greenhouse to get the best conditions for rapid growth. In addition, some plants with special natural growth conditions can also be cultivated in greenhouses, such as tropical plants, or in greenhouses built in cold regions. In order to control the temperature and humidity of the environment, or to provide sufficient illumination, the greenhouse requires complex and expensive environmental control equipment as well as expensive construction and maintenance costs. Moreover, in general, greenhouses are planted in a flat manner, resulting in low yield per unit area, resulting in low production and high prices.

In order to increase the yield per unit area of greenhouses, modern agricultural cultivation techniques mostly use three-dimensional plant cultivation racks to cultivate plants. In order to increase the yield, plant cultivation racks are stacked using a multi-layered structure, and each layer usually has a large area. Plant more plants. However, with this planting method, only the plants on the uppermost side and the side are able to obtain sufficient sunlight, and the plants planted in the middle and lower positions of the plant cultivation frame may not penetrate the plant cultivation frame because of the sunlight. One layer, or a multi-layered structure, shields the sunlight from each other, so that plants planted under the plant cultivation frame are unable to obtain sufficient sunlight to affect the growth of the plants. In order to solve this problem, each layer of the plant cultivation rack is generally disposed by an additional artificial light source to solve the problem of insufficient light irradiation. In particular, in order to promote plant growth, it is generally required to continuously provide high-illumination light, which represents a large amount of power consumption and a high cost of electricity.

In the concept of modern plant factories, the use of greenhouse environmental control and three-dimensional cultivation methods can provide a stable environment for plant growth and increase production per unit area. For example, existing operators have converted container houses into plant factories. Greenhouse use for plant growth. However, building greenhouses require high initial investment and expensive follow-up operations and maintenance costs. Therefore, it is urgent to propose a method to increase production per unit area and reduce subsequent operating costs in order to enhance the competitiveness of modern agriculture.

It is an object of the present invention to provide a plant growth system apparatus having a light guiding unit for introducing ambient light such as sunlight into a plant growth apparatus to promote plant growth.

The object of the present invention is to provide a plant growth system in which a plurality of plant cultivation racks are arranged in a greenhouse, and external light such as sunlight is introduced into each plant cultivation rack by a light guiding unit to promote plant growth. In order to increase the greenhouse area per unit area and reduce the cost of greenhouse operation and maintenance.

According to an embodiment of the present invention, a plant growth apparatus includes: a body having a space for accommodating a plant therein; and a light guiding unit disposed on at least one side of the body to introduce an ambient light into the body And an optical unit disposed on the top of the body to distribute the ambient light introduced from the light guiding unit to the inside of the body.

According to an embodiment of the present invention, there is provided a plant growth system comprising: a greenhouse for allowing an ambient light to enter the interior of the greenhouse; and a plurality of plant cultivation racks disposed in the greenhouse and having a plurality of layers, comprising: a light guiding unit disposed on at least one side of the plant growing rack to introduce an ambient light into the corresponding layer of the plant growing rack; and an optical unit disposed on top of each layer of the plant growing rack to The ambient light introduced from the light guiding unit is distributed to the corresponding layer of the plant growing rack.

According to an embodiment of the present invention, there is provided a method for growing a plant, comprising: providing a plant cultivation rack in a greenhouse, the plant cultivation rack comprising a plant; and providing a light guiding unit on at least one side of the plant cultivation rack; An optical unit is on top of each layer of the plant cultivation rack; and the plant cultivation rack is environmentally controlled to produce an environment suitable for the growth of the plant.

The above summary, the following detailed description and the annexed drawings are intended to further illustrate the manner, the Other objects and advantages of the present invention will be described in the following description and drawings.

In order to increase the yield per unit area of the greenhouse, a three-dimensional plant cultivation frame is usually used to transform the flat land use mode into a three-dimensional land use mode, which can be increased in multiples with the number of layers stacked in a three-dimensional manner. Production per unit area. However, since such a laminated structure generally does not allow sunlight to penetrate between the layers, the plants located in the middle and lower layers of the three-dimensional plant cultivation frame cannot obtain sufficient sunlight to affect the plants. Growth.

As shown in the first figure, a first embodiment of the present invention provides a plant growth apparatus 1 having a body 10 for receiving a soil layer 15 and a plant 14, and having a light guiding unit 11 and an optical unit 12. The light guiding unit 11 is disposed on at least one side or the periphery of the body 10. On the other side where the light guiding unit 11 is not disposed, a transparent partition may be disposed to generate a function of isolating the external environment. The optical unit 12 is disposed on the top of the inner side of the body 10. In this embodiment, the light guiding unit 11 is a light guiding sheet, and the optical unit 12 is a reflecting sheet. The ambient light is introduced into the body 10 through the light guiding unit 11, and the ambient light is reflected by the optical unit 12 to be uniform. It is distributed to the inside of the entire plant growth apparatus 1 to provide sufficient light for the photosynthesis of the plants 14 accommodated therein.

The main body 10 can be an outer casing type, and the light guiding unit 11 is disposed on at least one side thereof, and an opening may be provided on the side of the light guiding unit 11 or a transparent partition is disposed. The light guide sheet of the light guiding unit 11 can be formed by using a diamond lens of a micro-mirror structure. By the angle of the mirror of the micro-mirror structure, the ambient light can be deflected by reflection or refraction, and the ambient light can be introduced into the body. 10 inside. In addition, by adjusting the angle of the mirror of the micro-mirror structure to generate different deflection angles of the different wavelengths of light in the micro-mirror structure, a light guide sheet having different infrared light transmittance can be produced. Moreover, the light guiding unit 11 can be disposed on at least one side of the body 10 by attaching, locking, engaging or hanging.

The optical unit 12 can be realized by using an aluminum sheet, a silver mirror, an aluminum foil, or an aluminum lacquer or a silver lacquer to reflect the light refracted from the light guiding unit 11 to the inside of the plant growth apparatus 1. Wherein, the light guiding unit 11 can deflect the sunlight or the ambient light incident above the horizontal angle by a large angle to The incident sunlight is refracted to the top of the body 10 and is reflected by the optical unit 12 to the inside of the body 10.

In a preferred embodiment of the present invention, the light guiding unit 11 is suspended from opposite sides of the body 10, and the position of the plant growth apparatus 1 is adjusted according to the direction in which the sun rises and falls, and the sunlight is irradiated on both sides. The light unit 11 is for introducing sunlight. By means of suspension, the manager can pick up the light guide to facilitate the viewing of the growth state of the plant 14, and allows the administrator to easily replace various light guides with different light deflection angles or different infrared light transmittances. To adapt to different seasons and climates.

By arranging the light guiding unit 11 disposed on at least one side or the periphery of the plant growth apparatus 1 and the optical unit 12 disposed on the top of the body 10, the ambient light such as sunlight from the morning to the evening can be evenly distributed. The ground is distributed throughout the plant growth device 1. Thereby, the plants 14 housed in the plant growth apparatus 1 can be irradiated with good light to promote the growth of the plants 14.

In addition, at least one light source 13 may be disposed inside the body 10 of the plant growth apparatus 1 , and the light source 13 faces the optical unit 12 to uniformly illuminate the light generated by the light source 13 by the reflection of the optical unit 12 to the plant growth. The inside of the device 1. Of course, the light source 13 can also be directly disposed inside the body 10 to directly illuminate the plant 14.

When it is night or cloudy, when the illumination of the ambient light is insufficient, the light source 13 can be turned on to make up for the lack of ambient light. Wherein, the light source 13 can be realized by using an LED light source or an incandescent light source. In particular, the light source 13 can utilize a full-spectrum biological growth illuminating device such as the Republic of China Patent No. M368301 to generate a high-illumination daylight-like light to create a suitable environment for the growth of the plant 14 to promote the growth of the plant 14. Head of.

By using the light guiding unit 11, ambient light is introduced into the plant growth apparatus 1 to make full use of the ambient light, so that the plants 14 planted inside the plant growth apparatus 1 can obtain sufficient light to be irradiated. Further, the light source 13 provided inside the plant growth apparatus 1 can be used to make up for the insufficient illuminance of the internal light of the plant growth apparatus 1 at a time when the illuminance of the light is insufficient in a cloudy day or at night. If you use a full-spectrum biological growth illuminator that simulates sunlight, you can increase the illuminance and adjust the color temperature to create a more suitable environment for plant growth. By introducing ambient light into the plant growth apparatus 1, the time and brightness of turning on the light source 13 can be saved, thereby saving a large amount of electricity cost.

In the autumn and winter seasons, when the ambient temperature is low and the sunlight illumination is weak, the illuminance inside the plant growth device 1 becomes insufficient, and the internal temperature is also low, and the light source 13 can be turned on to supplement the illuminance of the light, and by The heat generated by the light source 13 maintains the temperature inside the plant growth apparatus 1. By introducing the ambient light into the light guiding unit 11, the electricity cost of the light source 13 can be reduced, and the heat generated by the light source 13 can be reduced, thereby reducing the cost of electricity for temperature control.

Since the light guiding unit 11 is disposed on at least one side or the periphery of the plant growth apparatus 1, the body 10 has the effect of isolating the external environment by the light guiding unit 11 or the partition plate, that is, the plant growing device 1 forms a small Greenhouse system. Moreover, different light guiding units 11 can have different infrared light transmittances. Therefore, in a lower temperature season such as winter, a light guiding unit 11 having a higher infrared light transmittance can be disposed to allow ambient light to be emitted. The infrared light is refracted into the plant growth device 1, and the small greenhouse system formed by the plant growth device 1 can achieve the effect of heat preservation; in the higher temperature season such as summer, the light guide unit with lower infrared light transmittance can be set. 11, to reduce red When the external light enters the plant growth device 1, the growth environment of the suitable plant 14 can be maintained. Thereby, it is not necessary to construct a greenhouse which is large and strictly controls the environment inside the greenhouse, and it is only necessary to control the ambient temperature and humidity inside each plant growth apparatus 1, and the same effect can be achieved.

A plant growth system or a plant factory can be constructed by placing a plurality of plant growth apparatuses 1 in a stacked manner and placing them in a greenhouse environment. Since it is only necessary to control the temperature and humidity of the internal environment of the plant growth apparatus 1, and the ambient light can be introduced into the interior of the plant growth apparatus 1 by the light guiding unit 11, the plant growth system or the plant factory constructed in this manner is not There is a need to build a greenhouse with expensive and complicated environmental control devices, and it is also not necessary to turn on the light source 13 at all times, thereby saving operating and maintenance costs. Moreover, the three-dimensional cultivation method can greatly increase the output per unit area, thereby effectively reducing the cost of operation and maintenance per unit area.

As shown in the second figure, a second embodiment of the present invention provides a plant growth apparatus 2 having a body 10 and having a space for accommodating the growth of the plant 14, and having a light guiding unit 21 and an optical unit 12. . The light guiding unit 21 can be disposed on at least one side or the periphery of the body 10. The optical unit 12 is disposed on the top of the body 10. The light guiding unit 21 can be realized by using a plurality of reflecting sheets, and the plurality of reflecting sheets can be realized by a plurality of concave reflecting sheets, a plurality of plane reflecting sheets or a combination of a plurality of concave reflecting sheets and planar reflecting sheets. For example, it is achieved by using three concave reflecting sheets 21a, 21b, and 21c. The optical unit 12 is a reflective sheet, and the ambient light can be introduced into the body 10 by the light guiding unit 21, and the ambient light is reflected by the optical unit 12 to be evenly distributed to the entire interior of the plant growth apparatus 1 to provide sufficient light. The plant 14 placed therein is subjected to photosynthesis.

The body 10 can be a box type external body, and the light guide is disposed on at least one side thereof. The unit 21, and the three concave reflecting sheets 21a, 21b, 21c of the light guiding unit 21 can transmit the ambient light to the inside of the plant growth apparatus 2 by adjusting the angles of the positions where they are disposed. In a preferred embodiment of the present invention, the light guiding unit 21 is disposed on opposite sides of the body 10, and the position of the plant growth device 2 is adjusted according to the direction in which the sun rises and falls, and the sunlight is irradiated on both sides. The light unit 21 is for introducing sunlight. The concave reflecting sheets 21a, 21b, and 21c can be realized by an aluminum sheet, a silver mirror or an aluminum foil, and can be adjusted by adjusting the respective curvatures of the concave reflecting sheets 21a, 21b, 21c and their relative positions and angles. Good angle of light and light. The light guiding unit 21 of the present embodiment is realized by three concave reflecting sheets 21a, 21b, and 21c. It is also known to those skilled in the art that the number of concave reflecting sheets can be adjusted, and even a combination of other types of reflecting sheets can be used. In order to achieve the purpose of introducing ambient light.

The light guiding unit 21 can reflect the sunlight of different illumination angles in the morning, noon or evening time into the interior of the plant growth device 2, and then the light can be uniformly irradiated to the plant growth device 2 by the reflection of the optical unit 12. internal. Thereby, the plants 14 housed in the plant growth apparatus 2 can be irradiated with good light for photosynthesis.

As with the first embodiment, the second embodiment may also be provided inside the plant growth apparatus 2 with at least one light source 13 to supplement or increase the illumination of the light. Moreover, by introducing ambient light into the plant growth apparatus 2, the time to turn on the light source 13 can be saved, thereby saving a large amount of electricity cost.

Since the light guiding unit 21 is disposed on at least one side or the periphery of the plant growth apparatus 2, and the periphery of the body 10 of the plant growth apparatus 2 can be separated from the external environment by using a partition, that is, the plant growth apparatus 2 can be regarded as a small Greenhouse system. In this way, there is no need to build a large greenhouse and strictly control it. The environment inside the greenhouse only needs to control the ambient temperature and humidity inside each plant growth device 2 to achieve the same effect.

As shown in the third figure, the third embodiment of the present invention has a structure similar to that of the second embodiment, and the difference is that the optical unit 12 of the present embodiment is a light guide plate and reduces the size of the light exit opening of the light guiding unit 21. The opening is made approximately equal to the thickness of the light guide plate to inject ambient light onto one side of the light guide plate, and the light is evenly distributed to the entire interior of the plant growth apparatus 3 by the light guide plate.

In this embodiment, at least one light source 13 may be disposed inside the body 10, and the light source 13 may be disposed at a side of the optical unit 12 to distribute the light generated by the light source 13 to the entire plant growth device 3 by using the optical unit 12. internal. Of course, the light source 13 can also be directly disposed inside the body 10 to directly illuminate the plant 14.

As shown in the fourth figure, the plant growth system 4 includes a greenhouse 40, and a plant cultivation rack 41 in which a plurality of plant growth apparatuses 1 are stacked. Among them, the greenhouse 40 has a transparent roof and walls to allow sunlight to enter the greenhouse 40. In the greenhouse 40, arrays of plant cultivation racks 41a, 41b, and 41c are provided, and each of the plant cultivation racks 41a, 41b, and 41c is stacked by a plurality of plant growth apparatuses 1 to form a multilayer structure. Further, a light guiding unit 11 may be respectively disposed on opposite sides of the plant growth apparatus 1, and the setting position of the plant growing frame 41 is adjusted according to the direction in which the sun rises and falls, and the sunlight is irradiated to the light guiding units 11 on both sides. To introduce sunlight.

Since the sun rises to the east and falls to the west, in the present embodiment, the building direction of the greenhouse 40 should be north-south, and the direction of the plant cultivation frame 41 should be east-west. Thereby, one side of the plant cultivation rack 41 can always face the direction in which the sun rises, and the other side can always face the side where the sun falls. Towards, each of the plant growth apparatuses 1 is refracted from the morning to the evening. Thereby, the sunlight from the morning to the evening can be fully utilized, so that the plurality of plant growth apparatuses 1 of the plant cultivation rack 41 can receive sufficient sunlight to allow the plants 14 planted therein to grow. At the same time, the light source 13 disposed in each layer of the plant cultivation frame 41 can be used to complement the internal light illuminance, and the temperature of each layer of the plant cultivation frame 41 can be adjusted by the heat generated by the light source 13.

Since the different light guiding units 11 have different infrared light transmittances, in the high temperature seasons such as spring and summer, the light guiding unit 11 with lower infrared light transmittance can be selected to reduce the infrared light entering the plant growth device 1, In order to maintain each layer of the plant cultivation frame 41 at an appropriate ambient temperature; in the lower temperature seasons such as autumn and winter, a light guide unit 11 with a higher infrared light transmittance may be selected to increase infrared light into the plant growth device 1, To maintain the ambient temperature of each layer of the plant growing rack 41. Thereby, the power consumed by the greenhouse 40 and the environmental control device required for the ambient temperature inside each plant growth device 1 can be reduced.

In addition, each of the plant growth apparatuses 1 can utilize the light guiding unit 11 disposed on both sides to form a relatively closed environment, which can be regarded as a small greenhouse system. Therefore, it is possible to reduce the purchase of equipment for environmental control of the greenhouse 40 and the power consumption thereof, and it is only necessary to blow air of an appropriate temperature and humidity through the air inlet 42 on one side of each plant growth apparatus 1 to adjust each The temperature and humidity inside the plant growth device 1. Thereby, the cost of the greenhouse 40 pre-equipment setting and the cost of subsequent operation and maintenance can be saved.

As shown in the fifth figure, the plant growth system 5 differs from the plant growth system 4 in that the light guiding unit 11 on the side of the plant growth apparatus 1 is provided with a reflecting unit 43 according to an embodiment of the present invention. The planting racks 41a and 41c near the sides of the greenhouse 40, and the light guiding unit 11 adjacent to the outside may not The reflecting unit 43 is provided, and the inner side of the plant growing racks 41a and 41c and the light guiding unit 11 on both sides of the plant growing rack 41b may be provided with a reflecting unit 43.

Wherein, the reflecting unit 43 can be disposed at a lower portion of the side of each plant growth device 1, and the reflecting unit 43 can be realized by an aluminum plate, a silver mirror, an aluminum foil or an aluminum lacquer, a silver lacquer or the like. In addition, the light guiding unit 11 and the reflecting unit 43 may be integrated into one body, the light guiding unit 11 is located at the upper portion, and the reflecting unit 43 is located at the lower portion, and the proportion of each occupied area may be adjusted according to the season, the climate, and the latitude of the greenhouse 40. .

The light guiding unit 11 and the reflecting unit 43 are disposed on the side of the plant growth apparatus 1. Since the plant 14 needs to be planted in the soil layer 15 or in the pot, and the roots do not need light to be irradiated, the lower part of the plant growth apparatus 1 does not require light irradiation. Thereby, ambient light can be reflected to the adjacent plant cultivation rack 41 by the reflection unit 43 at the lower side of the side of the plant growth apparatus 1 to increase the utilization of ambient light. Further, since the plant growing racks 41a and 41c located on both sides of the greenhouse 40 have no other plant growing device 1 on the outer side, the reflecting unit 43 can be omitted to save part of the cost.

Thereby, on the upper side of the side of the plant growth apparatus 1, a light guiding unit 11 may be provided to introduce ambient light into the interior of the plant growth apparatus 1; in a lower part of the side of the plant growth apparatus 1, a reflecting unit 43 may be provided to The ambient light is reflected to the plant growth apparatus 1 of the adjacent plant cultivation rack 41, whereby the ambient light can be used more efficiently, and the inside of the plant growth apparatus 1 can be made to have more uniform light irradiation.

As shown in the sixth figure, according to an embodiment of the present invention, the plant growth system 6 can form the plant growing racks 41a, 41b and 41c using the plant growing devices 2, 3 of the present invention. Therefore, the plant cultivation racks 41a, 41b, and 41c of the plant growth system 6 have a different structure from the plant growth system 4, but may Has the same effect.

As shown in the seventh figure, according to an embodiment of the present invention, the plant growth system 7 can form the plant growing racks 41a, 41b and 41c using the plant growing devices 2, 3 of the second or third embodiment of the present invention. Further, the plant growing racks 41a and 41c on both sides of the greenhouse 40 do not need to be provided with the reflecting unit 43 on the outer side, and the reflecting unit 43 may be provided on the inner side of the plant growing racks 41a and 41c and on both sides of the plant growing rack 41b. The reflecting unit 43 can be disposed under the light guiding unit 21, and the size and the setting position can be adjusted according to the season, the climate, and the latitude of the greenhouse 40.

Therefore, the plant cultivation racks 41a, 41b, and 41c of the plant growth system 7 have the same effect as the plant growth system 5 having a light guide unit 21 structure.

As shown in the eighth figure, a plant growth method is provided according to an embodiment of the present invention. A plurality of plant growth devices are disposed in a greenhouse 40 to form a plurality of plant cultivation racks 41, and the setting direction of the plant cultivation racks is adjusted according to the direction in which the sun rises and falls, as shown in step S81. Thereby, the utilization ratio per unit area can be greatly increased, and ambient light such as sunlight can be efficiently received and utilized.

Next, according to the latitude of the season, the climate and the greenhouse 40, appropriate light guiding units 11, 21 are selected and disposed on the side of the plant growing rack 41, and an optical unit is disposed on the top of each layer of the plant growing rack 41. 12, the ambient light is introduced into the interior of each of the plant growth devices by the light guiding units 11, 21, and the ambient light is distributed to the corresponding layer of the plant growing frame 41 by the optical unit 12, as shown in step S82. The reflection unit 43 is further disposed at a side of the plant growth device to reflect ambient light such as a plant root that does not require a light irradiation position to the adjacent plant cultivation frame 41 to more efficiently The ambient light is applied as shown in step S83.

Finally, a plurality of plant cultivation racks 41 are environmentally controlled, and air having one of appropriate humidity and temperature is blown into each layer of the plant cultivation rack 41 by the air inlet 42 located at one side of the plant cultivation rack 41 to control The temperature and humidity inside each plant growth device of the plant cultivation frame 41. Moreover, when the illuminance of the light inside the plant growth device is insufficient, the light source 13 is turned on to supplement the illuminance of the light required for plant growth, thereby forming an appropriate plant growth environment, as shown in step S84.

However, the above description is only for the purpose of illustration and illustration of the embodiments of the present invention, and is not intended to limit the scope of the invention. Variations or modifications that may be readily conceived within the scope of the invention may be covered by the scope of the invention as defined in the following.

1, 2, 3 ‧ ‧ plant growth devices

4, 5, 6, 7‧ ‧ plant growth systems

10‧‧‧ Ontology

11, 21‧‧‧Lighting unit

12‧‧‧ Optical unit

13‧‧‧Light source

14‧‧‧ plants

15‧‧‧Soil layer

21a, 21b, 21c‧‧‧ concave reflective sheet

40‧‧ ‧ greenhouse

41, 41a, 41b, 41c‧‧‧ plant cultivation rack

42‧‧‧Air inlet

43‧‧‧Reflection unit

S81-S84‧‧‧ Flowchart of plant growth methods

The first figure shows a schematic view of a device of a plant growth apparatus having a light guiding unit according to a first embodiment of the present invention.

The second figure shows a schematic view of a device for a plant growth apparatus having a light guiding unit according to a second embodiment of the present invention.

The third figure shows a schematic view of a device for a plant growth apparatus having a light guiding unit according to a third embodiment of the present invention.

The fourth figure shows a schematic view of a plant growth system in accordance with an embodiment of the present invention.

Figure 5 is a schematic view of a plant growth system in accordance with an embodiment of the present invention.

Figure 6 is a diagram showing the loading of a plant growth system according to an embodiment of the present invention. Set the diagram.

Figure 7 is a schematic view of a plant growth system in accordance with an embodiment of the present invention.

Figure 8 is a flow chart showing a method of growing a plant according to an embodiment of the present invention.

S81-S84. . . Description of the process steps of the plant growth method

Claims (10)

A plant growth device for stacking on a plant cultivation rack, comprising: a body having a space for accommodating a plant; a light guiding unit having infrared light transmittance, disposed on at least one side of the body a light from the outside of the body is introduced into the body; and an optical unit is disposed on the top of the body to distribute the light introduced from the light guiding unit to the inside of the body; wherein the light guiding unit is horizontal The light above the angle is deflected into the optical unit, and the light guiding unit and the optical unit are respectively disposed on different sides of the body. The plant growth apparatus of claim 1, wherein the optical unit is a reflective sheet or a light guide. The plant growth apparatus of claim 1, wherein the light guiding unit is a light guiding sheet or a plurality of concave reflecting sheets, a plurality of planar reflecting sheets or a combination of a plurality of concave reflecting sheets and planar reflecting sheets. One of the light guide sheets is a diamond lens having a micro-mirror structure. The plant growth apparatus of claim 1, further comprising: a reflection unit disposed on at least one side of the body and disposed under the light guiding unit; a light source disposed inside the body And the light source is one of an LED light source and an incandescent light source. A plant growth system comprising: a greenhouse for allowing a light to enter the interior of the greenhouse; and a plurality of plant cultivation racks disposed in the greenhouse, and each of the plant cultivation racks is stacked with a plurality of plant growth devices, the plants growing The device includes: a body having a space for accommodating a plant; a light guiding unit having infrared light transmittance, disposed on at least one side of the body to introduce the light to the body; and an optical unit disposed on the a top portion of the body for distributing the light introduced from the light guiding unit to the inside of the body; wherein the light guiding unit deflects light above a horizontal angle into the optical unit, and the light guiding unit and the optical The units are respectively disposed on different sides of the body. The plant growth system of claim 5, wherein the plant cultivation frame is composed of a plurality of plant growth devices, and the optical unit is a reflection sheet or a light guide plate, and the light guide unit is a light guide unit. The sheet is a plurality of concave reflecting sheets, a plurality of plane reflecting sheets or a combination of a plurality of concave reflecting sheets and a plane reflecting sheet, and the light guiding sheet is a rhombohedron having a micro-mirror structure. The plant growth system of claim 5, further comprising an air inlet disposed on one side of the plant cultivation rack for blowing air having a suitable temperature and humidity for controlling the plant cultivation rack Internal environment. A plant growth method comprising: arranging a plant cultivation rack in a greenhouse, wherein each of the plant cultivation racks has a plurality of the plant growth apparatuses stacked in one of the claims 1 to 4, and each of the plants grows A plant is included in the apparatus; and the plant cultivation rack is subjected to an environmental control to produce an environment suitable for the growth of the plant. The method of plant growth according to claim 8, wherein the plant cultivation rack is composed of a plurality of plant growth devices, and the light guiding unit is a light guide plate or a plurality of concave reflection sheets, a plurality of plane reflection sheets or a combination of a plurality of concave reflection sheets and a plane reflection sheet, wherein the optical unit is a reflection sheet or a light guide sheet, and the light guide The sheet is a rhomboid lens having a micro-mirror structure, and the environment control blows air having an appropriate temperature and humidity by an air inlet provided on one side of the plant cultivation rack. The method for growing a plant according to claim 8, further comprising selecting the light guiding unit having different infrared light transmittance according to a climate, a season or a latitude of the greenhouse, wherein the environmental control means controlling each At least one of temperature, humidity and brightness inside the plant growth device.