A rice low-light power generation dark germination system and method

Abstract

This invention relates to a low-light, dark-light germination system and method for rice. The system includes a dark chamber, which consists of walls, a roof, and a floor. The walls and roof facing outwards are covered with black cadmium telluride photovoltaic glass. The walls facing inwards serve as a supporting insulation layer and are equipped with a DC combiner box, a photovoltaic inverter, and an energy storage device. The interior of the dark chamber also includes a ceiling fan, a constant-temperature air conditioner, a humidifier, and a real-time temperature and humidity monitor. The exterior of the dark chamber is equipped with an outdoor temperature monitor. The method involves the following steps: 1. Sowing; 2. Stacking trays; 3. Maintaining high temperature and humidity for dark germination. This invention eliminates the need for industrial energy input and achieves self-sustaining operation in rice cultivation; the relatively constant temperature and humidity promote uniform germination in mechanized rice cultivation; and it enables integrated green development of production, life, and ecology.

Description

Technical Field

[0001] This invention belongs to the field of agricultural hybrid rice cultivation technology, and relates to a rice low-light power generation dark germination system and method. Background Technology

[0002] Mechanized rice transplanting is characterized by strong disaster resistance, low herbicide usage, and high yield potential, making it a major planting method in the mechanized development of rice. Cultivating high-quality seedlings is fundamental to achieving high yields through mechanized transplanting, and high-quality, uniform germination is not only the first step in cultivating high-quality seedlings but also saves on seeds and costs. In recent years, addressing the problems of low germination rate, poor uniformity, and low seedling survival rate in traditional seedling raising methods, researchers such as the China National Rice Research Institute have proposed a seedling raising technology involving tray germination in a darkened chamber. After 2-3 days of high temperature and humidity in a heated, darkened chamber connected to industrial energy input, seedlings germinate to a height of 0.5-1.0 cm. These seedlings are then transferred to greenhouses for further growth, significantly improving germination quality and cultivating high-yield and high-survival-rate machine-transplanted seedlings, marking a new milestone in seedling raising technology. Sichuan has also introduced this technology, and currently two types are being promoted more widely: one is to completely follow the original technology, that is, to maintain a high temperature and high humidity environment in a dark room using industrial electricity to achieve uniform germination. Yu Junqi and others believe that this requires maintaining an indoor temperature of 30-34℃ and humidity of over 80% after stacking the trays to increase the seed germination rate by more than 10%, but this will consume a lot of industrial energy; the other is proposed by Chen Yong and others, which is to directly achieve the purpose of darkening conditions and absorbing sunlight to increase temperature and keep warm outdoors by covering with colored tarpaulins. This method saves costs and improves the uniformity of seedling germination and seedling survival rate. However, if low temperatures and cold waves occur, the darkening time will be long, increasing management costs and causing poor uniformity of germination in the upper, middle and lower parts of the seedlings. Generally, the standard for placing the seedlings in the trays after darkening is that the middle part of the seedlings will have 1.5-2.0cm of germination. However, at this time, the germination is equivalent to just emerging from the soil and is not strong enough. In particular, some of the germination in the bottom trays may not have even sprouted yet. There is a problem of germination dying after the seedlings are placed in the trays due to low temperatures. In particular, the repeated cold snaps during seedling cultivation in late March to early April are also an important reason for the low germination rate and uniformity.

[0003] In summary, existing technologies suffer from several drawbacks. The darkroom tray germination technique, invented to improve seedling quality, results in industrial energy waste, increased management costs due to long darkening time in open fields, and poor uniformity of germination from the top, middle, and bottom. These issues hinder the further promotion of mechanized seedling raising technology in low-light regions, such as Sichuan, and limit the mechanized development of rice production in these areas. Therefore, there is an urgent need to develop new seedling raising technologies to promote the mechanization of rice production. Summary of the Invention

[0004] Purpose of the invention

[0005] To address the problems of industrial energy waste, increased management costs due to long darkening times in open fields, and poor uniformity of germination in the upper, middle, and lower parts of rice seedlings in existing machine-transplanted rice seedling raising technologies in low-light areas like Sichuan, this paper proposes a low-light power generation darkening germination system and method to improve seedling quality. This system allows for direct use of natural photovoltaic heating and humidification in dark rooms in low-light areas, achieving the goal of cultivating uniformly sprouted, robust seedlings under low-carbon and green conditions by directly utilizing natural photovoltaic darkening germination.

[0006] Technical solution

[0007] A low-light, dark-light germination system for rice includes a dark chamber, which consists of walls, a roof, and a floor. The exterior of the walls and roof facing the dark chamber are covered with black cadmium telluride photovoltaic glass. The interior side of the walls serves as a supporting insulation layer. An insulated door is located on the front or rear wall. A DC combiner box, a photovoltaic inverter, and an energy storage device are installed inside or outside the dark chamber. The DC combiner box is electrically connected to the cadmium telluride photovoltaic glass, and the photovoltaic inverter is connected to the DC combiner box. Electrically connected, the photovoltaic inverter is electrically connected to the energy storage device. The inside of the darkroom is also equipped with a ceiling fan, a constant temperature air conditioner, a humidifier, and a real-time temperature and humidity monitor. The outside of the darkroom is also equipped with an outdoor temperature monitor. The energy storage device is electrically connected to the ceiling fan, the constant temperature air conditioner, the humidifier, the real-time temperature and humidity monitor, and the outdoor temperature monitor. The ceiling fan is connected to the roof. An insulated ceiling curtain is hung on the inside of the wall from the ground to a height of 1.8-2m. The length and width of the insulated ceiling curtain are the same as the length and width of the darkroom and can be folded to the corner of the wall.

[0008] Furthermore, the area of ​​a single cadmium telluride photovoltaic glass pane is 0.16-1.92m². 2 The exterior walls, composed of cadmium telluride photovoltaic glass on both sides, are 4.8-19.2m long, 3.2-3.5m wide, and 2.4-2.5m high.

[0009] Furthermore, the roof is a double-sloped roof, with the two slopes forming an angle of 10-30° with the horizontal plane. Furthermore, the ceiling fans are connected to the roof beams, with at least two fans, each a 42-inch, three-blade fan with a power of 55-100W, and the fan blades are positioned 2.05-2.15m above the ground.

[0010] Furthermore, the wall surface comprises, from the outside to the inside, cadmium telluride photovoltaic glass, a steel frame wall, an EPS insulation layer, and a perforated reinforced cement fiberboard. The steel frame wall, EPS insulation layer, and perforated reinforced cement fiberboard form a supporting insulation layer. The cadmium telluride photovoltaic glass is connected to the steel frame wall via a point-supported curtain wall connection method. The floor comprises, from top to bottom, a floor adhesive layer, a bamboo fiber composite board, an EPS insulation layer, and a ground steel frame layer. The EPS insulation layer is expandable polystyrene board with a thickness of 5-9 cm, and the ground steel frame layer has a thickness of 0.2-0.3 m.

[0011] Furthermore, the DC combiner box is configured with 8 inputs and 1 output or 10 inputs and 1 output, and is electrically connected to each cadmium telluride photovoltaic glass.

[0012] Furthermore, the energy storage device has a reserved interface for connecting to external rice seedling raising and sowing production line equipment, conveyor belts, automatic tray stacking machines, seedbed sprinkler irrigation equipment, and lighting equipment.

[0013] A method for dark germination using the low-light power generation system for rice as described above includes the following steps:

[0014] Step 1, Sowing: Use the rice seedling raising and sowing assembly line equipment to sow the machine-transplanted rice seeds into the hard drive;

[0015] Step 2, Stacking: After the hard drives have been sown, they are transported to the dark room by a conveyor belt and automatically stacked by an automatic stacking machine. The stacked hard drives are then manually stacked onto (1.1-1.2)×(0.58-0.6)m trays, with 40-60 hard drives per stack. Four stacks are evenly placed on each tray. Then, a layer of non-woven fabric is placed on the top hard drive to keep it moist. A conveyor belt is set up to enter from outside the door and placed in the middle of the dark room. The trays are placed on both sides of the conveyor belt, with an interval of 0.2-0.3cm between adjacent trays.

[0016] Step 3: Maintain high temperature and humidity for dark germination: During the dark germination period, use a humidifier to control the humidity in the dark room to 50%-75%, and adjust the temperature in the dark room as follows: If the outside temperature is higher than 15℃ during the day, open the heat-insulating curtain and use the cadmium telluride photovoltaic glass on the roof to absorb solar energy and naturally raise the temperature. Use the ceiling fan to stir the airflow in the dark room to make the temperature in the entire dark room uniform. When the temperature in the dark room is lower than 25℃, use air conditioning to raise the temperature to 28-32℃. When the temperature in the dark room is higher than 35℃, close the heat-insulating curtain and use air conditioning to lower the temperature to 32-34℃. The dark room germination time is 3-4 days, and the standard sprout length is 1.5-1.8cm when completed.

[0017] Furthermore, all power sources come from the electricity generated by the cadmium telluride photovoltaic glass used in the walls and roof of the darkroom. When there is sufficient sunlight, the electricity generated by the cadmium telluride photovoltaic glass can be stored in a lead-acid energy storage device when energy is conserved. It can also power the equipment in cloudy or rainy weather, or at night when there is little or no light.

[0018] Advantages and effects

[0019] The system and method of this invention for dark germination can achieve the goal of low-carbon, green, and high-quality seedling cultivation by reducing industrial energy consumption and shortening the dark germination period in three aspects:

[0020] First, it eliminates the need for industrial energy input and achieves self-sustaining operation for rice seedling cultivation. The glass exterior walls and roof of this system are made of cadmium telluride photovoltaic glass, which can generate electricity even in low light conditions. This can power the rice seedling sowing production line, as well as the humidification equipment, lighting equipment, and constant temperature air conditioning in the darkroom, meeting the power requirements of highly automated mechanized rice seedling cultivation and achieving the need for passive power supply for rice seedling cultivation.

[0021] Secondly, the relatively constant temperature and humidity promote uniform seedling emergence in mechanized rice seedling raising. This system uses cadmium telluride photovoltaic glass to generate electricity, which drives temperature and humidity control. The emergence time for rice seedlings in the dark can be stably controlled within 3-4 days, with seedlings reaching a standard length of 1.5-1.8cm, increasing the predictability of rice emergence time. The uniformity of temperature and humidity in the dark chamber reduces the temperature difference between the upper and lower parts of the seedling tray stack and between the inside and outside to within 0.5℃, ensuring uniform seedling emergence from all trays.

[0022] Third, it ensures the integrated green development of production, life, and ecology for rice farmers. Relying on the power supply of this system, if there is sufficient sunlight, it can deliver electricity for rice seedling cultivation and sowing, environmental control for dark germination, and irrigation management. This supplements the electricity needs of producers, reduces the use of grid electricity, improves residents' lives, and also reduces the negative environmental impacts of coal-fired power generation or surface water diversion power generation, thus contributing to ecological environmental protection and achieving the integration of production, life, and ecology.

[0023] In addition, the roof and walls of this rice low-light power generation and dark germination system are made of black cadmium telluride photovoltaic glass. First, the black color of the glass gives the system a dark room effect, maximizing power generation efficiency. Second, the glass is not only a power generation material but also a building material, eliminating the need for additional land for photovoltaic power generation. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The scope of protection of the present invention is not limited to the descriptions below.

[0025] Figure 1A three-dimensional structural diagram showing the partial perspective of a rice low-light power generation and darkened germination system;

[0026] Figure 2 A schematic cross-sectional view of a low-light power generation system for rice germination.

[0027] Figure 3 Enlarged schematic diagram of the cross-sectional structure of the wall surface of the rice low-light power generation and darkening germination system;

[0028] Figure 4 Enlarged schematic diagram of the ground profile structure of the rice low-light power generation and darkening germination system;

[0029] Figure 5 This is a schematic diagram of the interior floor plan of a dark room from above.

[0030] Figure 6 This is a diagram illustrating the device connection relationships;

[0031] Figure 7 This is a schematic diagram illustrating the system's operating principle and process.

[0032] Explanation of reference numerals in the attached drawings: 1-CdTellite photovoltaic glass, 2-Supporting insulation layer, 3-Insulated door, 4-Perforated reinforced cement fiber board, 5-EPS insulation layer, 6-Steel frame wall, 7-Floor adhesive layer, 8-Bamboo fiber composite board, 9-Ground steel frame layer, 10-Seedling tray stack and pallet, 11-Seedling raising work channel, 12-Automatic tray stacking machine, 13-Conveyor belt, 14-Seedling raising and sowing production line. Detailed Implementation

[0033] like Figures 1-7 As shown, a low-light, dark-light rice germination system combines photovoltaic power generation and a rice germination greenhouse function. It includes a darkroom, which consists of walls, a roof, and a floor. The roof is a double-sloped roof, with the two slopes forming an angle of 10-30° with the horizontal plane. The walls and roof facing outwards are covered with black cadmium telluride photovoltaic glass 1. In this embodiment, the cadmium telluride photovoltaic glass 1 used is manufactured by Chengdu Zhongjiancai Optoelectronic Materials Co., Ltd., and its area is 0.16-1.92 m². 2The exterior walls, composed of cadmium telluride photovoltaic glass on both sides, are 4.8-19.2m long, 3.2-3.5m wide, and 2.4-2.5m high. The wall facing the inside of the darkroom serves as a supporting insulation layer 2. An insulated door 3 is installed on the wall at the front or rear. A DC combiner box, a photovoltaic inverter, and an energy storage device are installed on the inside or outside of the darkroom. The DC combiner box is electrically connected to the cadmium telluride photovoltaic glass 1, the photovoltaic inverter is electrically connected to the DC combiner box, and the photovoltaic inverter is electrically connected to the energy storage device. A ceiling fan, a constant temperature air conditioner, a humidifier, and a real-time temperature and humidity monitor are also installed on the inside of the darkroom. An outdoor temperature monitor is also installed on the outside of the darkroom. The energy storage device is electrically connected to the ceiling fan, the constant temperature air conditioner, the humidifier, the real-time temperature and humidity monitor, and the outdoor temperature monitor. The ceiling fan is connected to the roof beam. There are at least two ceiling fans. The ceiling fans are 42-inch 3-blade ceiling fans with a power of 55-100W. The distance between the fan blades and the ground is approximately 2.05-2.15m. This arrangement ensures sufficient airflow inside the darkroom. A spunlace nonwoven fabric heat-insulating ceiling curtain is hung on the inside of the wall from the ground to a height of 1.8-2m. The length and width of the heat-insulating ceiling curtain are the same as the length and width of the dark room and can be folded to the corner of the wall.

[0034] The wall surface, from the outside to the inside, consists of cadmium telluride photovoltaic glass 1, steel frame wall 6, EPS insulation layer 5, and perforated reinforced cement fiber board 4. The steel frame wall 6, EPS insulation layer 5, and perforated reinforced cement fiber board 4 form the supporting insulation layer 2. The perforated reinforced cement fiber board 4 helps maintain the durability of the indoor side wall and also provides a certain degree of insulation. The cadmium telluride photovoltaic glass 1 is connected to the steel frame wall 6 through a point-supported curtain wall connection method. The floor consists of, from top to bottom, a floor adhesive layer 7, bamboo fiber composite board 8, EPS insulation layer 5, and a ground steel frame layer 9. The EPS insulation layer 5 is an expandable polystyrene board with a thickness of 5-9cm. The ground steel frame layer 9 has a thickness of 0.2-0.3m, which can raise the floor to reduce heat conduction and also ensure the floor strength. The insulated door 3 consists of a color steel outer layer and a 5-9cm EPS insulation interlayer.

[0035] The DC combiner box is available in 8-in-1-out or 10-in-1-out configurations. It is electrically connected to each cadmium telluride photovoltaic glass 1, collecting the DC power generated by each cadmium telluride photovoltaic glass 1. The DC power is then input into the photovoltaic inverter, which converts the variable DC voltage into a 220V AC voltage and outputs it to the energy storage device. The energy storage device has a reserved interface for connecting external rice seedling raising and sowing production line equipment, conveyor belts, automatic tray stacking machines, seedbed sprinkler irrigation equipment, and lighting equipment.

[0036] The low-light power generation system for rice seedlings is oriented east-west. For example... Figure 5As shown, seedling trays and pallets 10 are located on both sides of the seedling raising work channel 11. The seedling raising work channel 11 is in the middle of the dark room, and a conveyor belt 13 is placed there. An automatic tray stacking machine 12 is placed at the end of the conveyor belt 13, and a seedling raising and sowing production line 14 is set at the other end of the conveyor belt 13.

[0037] A method for dark germination using a low-light power generation system for rice, comprising the following steps:

[0038] Step 1, Sowing: Use the rice seedling raising and sowing assembly line equipment to sow the machine-transplanted rice seeds into the hard drive;

[0039] Step 2, Stacking: After the hard drives have been sown, they are transported to the dark room by a conveyor belt and automatically stacked by an automatic stacking machine. The stacked hard drives are then manually stacked onto (1.1-1.2)×(0.58-0.6)m trays, with 40-60 hard drives per stack. Four stacks are evenly placed on each tray. Then, a layer of non-woven fabric is placed on the top hard drive to keep it moist. A conveyor belt is set up to enter from outside the door and placed in the middle of the dark room. The trays are placed on both sides of the conveyor belt, with an interval of 0.2-0.3cm between adjacent trays.

[0040] Step 3: Maintain High Temperature and Humidity for Dark Germination: During the dark germination period, use a humidifier to control the humidity in the dark room to 50%-75%, and adjust the temperature as follows: If the outside temperature is higher than 15℃ during the day, open the heat-insulating curtain to allow the cadmium telluride photovoltaic glass 1 on the roof to absorb solar energy and naturally raise the temperature, while using ceiling fans to agitate the airflow in the dark room to ensure a uniform temperature throughout. If the temperature in the dark room is lower than 25℃, use air conditioning to raise the temperature to 28-32℃; if the temperature in the dark room is higher than 35℃, close the heat-insulating curtain and use air conditioning to lower the temperature to 32-34℃. The dark germination time is 3-4 days, and the standard sprout length is 1.5-1.8cm upon completion. After dark germination, the hard drive can be transported out of the dark room by a combination of manual labor and conveyor belt 13 for subsequent operations such as spraying. All power sources come from the cadmium telluride photovoltaic glass used in the walls and roof of the darkroom. When there is sufficient sunlight, the electricity generated by the cadmium telluride photovoltaic glass can be stored in a lead-acid energy storage device when energy is conserved. The equipment can also be powered during cloudy or rainy weather and at night when there is little or no light.

[0041] Implementation effect

[0042] In 2023, a 15.7 square meter (4.86m long, 3.2m wide, and 2.4m high) seedling raising system of this invention was established in Daping Village, Qiaowo Town, Puge County, Liangshan Prefecture, Sichuan Province. On average, 800 trays can be darkened at a time. Table 1 shows that the average daytime and nighttime temperatures during the darkening period of this invention's system are 5.09-5.37℃ higher than the average temperature of traditional outdoor darkening. Furthermore, the temperature variation coefficient of this invention's system is smaller, indicating that the temperature within the system is constant and controllable, which is more conducive to uniform germination. From the germination results, this invention's system can produce a batch of strong, uniform seedlings every 91 hours, saving 34.5% of the germination time compared to traditional outdoor darkening. The average germination rate of this invention's darkening system is 1.21 percentage points higher than traditional darkening methods. The smaller height difference between the upper and lower trays indicates higher seedling uniformity, all demonstrating the advanced nature of this invention's system. Based on the local annual suitable rice seedling raising period of 50 days, a total of 14 batches of seedlings can be raised in the dark, totaling 11,200 trays of seedlings. The support strength of each square meter of the dark chamber is 713 trays. If we assume an average of 18 trays of seedlings are needed per mu (approximately 0.16 acres) of paddy field, it can supply seedlings for 622 mu (approximately 41.4 acres) of paddy field. The average seedling intensity that each square meter of the dark chamber can support is 39.6 mu (approximately 2.6 acres) of paddy field. This demonstrates that the system of this invention not only does not occupy space but also greatly saves the land area required for dark germination.

[0043] Table 1 Comparison of the budding effect of the system of the present invention with that of traditional outdoor dark germination.

[0044]

[0045] Table 2 Comparison of the budding and outdoor ambient temperature of the system of the present invention with those of traditional outdoor dark germination.

[0046]

[0047] In addition, during the seedling emergence period after sowing, the darkroom is equipped with a 1-horsepower air conditioner, which is turned on from 8 PM to 8 AM the next day for 12 hours to increase the temperature. Monitoring shows that the temperature control power load is approximately 850W, requiring a total of 10.2 kWh of electricity. During the day, if the temperature is too high or too low, it is used to regulate the temperature for an average of 3 hours each time, with an average load of 900W, requiring a total of 2.7 kWh of electricity. Sprinkler irrigation for rice is used for an average of 0.3 hours, with a power load of 1000W, requiring an average of 0.3 kWh of electricity per day. Two base operation and management personnel are stationed at the base, and their daily activities involve cooking, stir-frying, and charging household appliances. This includes one induction cooker and two mobile phones, with a combined power of 805W, used for an average of 2.5 hours per day, consuming a total of 2.01 kWh of electricity. In total, the average daily electricity consumption is 15.2 kWh. According to the daily average power generation monitoring data during the seedling raising period (March 29 to April 2, 2023), the average daily power generation of the power generation chamber of this system was 47.2 kWh. The system has a total surplus of 35.4 kWh of electrical energy.

[0048] Table 3. Power generation effect (kWh) of the system of the present invention

[0049]

[0050] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all embodiments here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A method for darkening germination using a rice weak light power generation darkening germination system, characterized in that: The system includes a darkroom, which consists of walls, a roof, and a floor. The walls and roof facing outwards are covered with black cadmium telluride photovoltaic glass (1). The walls facing inwards serve as a supporting insulation layer (2). An insulated door (3) is installed on the front or rear wall. A DC combiner box, a photovoltaic inverter, and an energy storage device are installed on the inside or outside of the darkroom. The DC combiner box is electrically connected to the cadmium telluride photovoltaic glass (1), and the photovoltaic inverter is electrically connected to the DC combiner box. The photovoltaic inverter is electrically connected to the energy storage device. The inner side of the darkroom is also equipped with a ceiling fan, a constant temperature and humidity air conditioner, a humidifier, and a real-time temperature and humidity monitor. The outer side of the darkroom is also equipped with an outdoor temperature monitor. The energy storage device is electrically connected to the ceiling fan, the constant temperature and humidity air conditioner, the humidifier, the real-time temperature and humidity monitor, and the outdoor temperature monitor. The ceiling fan is connected to the roof. An insulated ceiling curtain is hung on the inner side of the wall from the ground to a height of 1.8-2m. The length and width of the insulated ceiling curtain are the same as the length and width of the darkroom and can be folded to the corner of the wall. The monolithic cadmium telluride photovoltaic glass (1) has an area of 0.16-1.92m 2 The left and right side walls are composed of cadmium telluride photovoltaic glass (1) with a length of 4.8-19.2m, a width of 3.2-3.5m, and a height of 2.4-2.5m. The roof is a double-sloped roof, with the two slopes of the roof forming an angle of 10-30° with the horizontal plane; The wall surface includes, from the outside to the inside, cadmium telluride photovoltaic glass (1), steel frame wall (6), EPS insulation layer (5) and perforated reinforced cement fiber board (4). The steel frame wall (6), EPS insulation layer (5) and perforated reinforced cement fiber board (4) form a supporting insulation layer (2). The cadmium telluride photovoltaic glass (1) is connected to the steel frame wall (6) through a point-type curtain wall connection method. The ground surface includes, from top to bottom, a floor adhesive layer (7), bamboo fiber composite board (8), EPS insulation layer (5) and ground steel frame layer (9). The EPS insulation layer (5) is expandable polystyrene board with a thickness of 5-9cm. The ground steel frame layer (9) has a thickness of 0.2-0.3m. The method includes the following steps: Step 1: Using a rice seedling raising and sowing assembly line, machine-transplanted rice seeds are sown into hard disks; Step 2: After sowing, the hard disks are conveyed by a conveyor belt to a dark room where they are automatically stacked by an automatic stacking machine. The stacked hard disks are then manually piled onto (1.1-1.2)×(0.58-0.6)m trays, with 40-60 hard disks per stack. Four stacks are evenly placed on each tray. A layer of non-woven fabric is then placed over the top hard disk to retain moisture. A conveyor belt enters from outside the dark room and is positioned in the center of the dark room. Trays are placed on both sides of the conveyor belt, with an interval of 0.2-0.3cm between adjacent trays.

3. During the darkening period, the humidity in the dark room should be controlled at 50%-75% using a humidifier, and the temperature in the dark room should be adjusted. The temperature adjustment rules are as follows: If the outside temperature is higher than 15℃ during the day during the darkening period, the heat insulation curtain should be opened, and the cadmium telluride photovoltaic glass (1) on the roof should be used to absorb solar energy and naturally raise the temperature. The ceiling fan should be used to stir the airflow in the dark room to make the temperature in the entire dark room even. When the temperature in the dark room is less than 25℃, the air conditioner should be used to raise the temperature to 28-32℃. When the temperature in the dark room is higher than 35℃, the heat insulation curtain should be closed and the air conditioner should be used to lower the temperature to 32-34℃. The germination time in the dark room is 3-4 days, and the standard germination length is 1.5-1.8cm when it is completed.

2. The method of darkening and germination using the weak light power generation darkening and germination system for rice according to claim 1, characterized in that: The ceiling fan is connected to the roof beam. There are two or more ceiling fans. The ceiling fans are 42-inch 3-blade ceiling fans with a power of 55-100W. The distance between the ceiling fan blades and the ground is 2.05-2.15m.

3. The method of darkening and germination using the weak light power generation darkening and germination system for rice according to claim 1, characterized in that: The DC combiner box is configured with 8 inputs and 1 output or 10 inputs and 1 output, and is electrically connected to each cadmium telluride photovoltaic glass (1).

4. The system and method for weak light power generation darkening and sprouting of rice according to claim 1, wherein: The energy storage device has a reserved interface for connecting to external rice seedling raising and sowing production line equipment, conveyor belts, automatic tray stacking machines, seedbed sprinkler irrigation equipment, and lighting equipment.

5. The method for darkening and germination according to claim 1, wherein the method for darkening and germination using the weak light power generation darkening and germination system for rice. All power sources come from the cadmium telluride photovoltaic glass used in the walls and roof of the darkroom. When there is sufficient sunlight, the electricity generated by the cadmium telluride photovoltaic glass can be stored in a lead-acid energy storage device when energy is conserved. The equipment can also be powered during cloudy or rainy weather and at night when there is little or no light.

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