Method for promoting rice growth by using light source

Abstract

The invention discloses a method for promoting rice growth by using a light source. After the steps of seed soaking, germination accelerating and sowing pretreatment, a light source is arranged, management and regulation are conducted in the rice growing period, and finally harvesting is conducted. The rice growth period management and regulation comprise spectrum setting in a vegetative growth period and a reproductive growth period, light and strong light period regulation and control and temperature, humidity and CO2 concentration control. The technical scheme of the invention is expected to bring revolutionary revolution to rice breeding, significantly shorten the rice cultivation period, improve the resource utilization efficiency, and promote the sustainable development of agricultural production.

Description

Technical Field

[0001] The present invention relates to the field of biochemical regulation of accelerated rice growth by light conditions, and specifically to a method for promoting rice growth by using light sources, especially a method for managing and regulating light intensity, light cycle, temperature, humidity and CO2 concentration during the rice growth period. Background Art

[0002] In recent years, environmental problems such as global climate change, acid rain, ozone layer depletion, and sharp decline in biodiversity have become increasingly serious. These environmental problems have had a significant impact on agricultural production. In order to reduce the impact on the environment and reduce production costs, the demand for crop germplasm resources is increasing day by day.

[0003] Rice is one of the most important food crops in my country and plays a leading role in ensuring food security. Thanks to the development of science and technology, especially the progress of rice breeding technology, my country's rice yield has achieved two qualitative leaps since the large-scale application of rice dwarfing breeding and hybrid rice. In the new era, consumers' demands for rice varieties and rice products are becoming more and more diversified. The current rice breeding efficiency is still not ideal and it is difficult to meet future needs. The long growth cycle of rice in the field environment makes it difficult to plant it all year round, resulting in a long rice breeding cycle, which has become one of the bottlenecks of rice breeding.

[0004] Rapid breeding technology is a new technology that has emerged in recent years. It promotes crop growth, flowering and maturity through comprehensive measures such as environmental regulation and growth control, thereby accelerating the crop generation process. It can shorten the breeding cycle and achieve multiple generations of breeding in one year. It is expected to significantly shorten the breeding period and improve breeding efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a method for promoting rice growth using light sources. Indica and japonica rice crops grown according to the following method are grown and evaluated under the most suitable conditions by optimizing environmental conditions and management measures during the growth process. This includes soaking seeds, germination, sowing, rice growth period management and regulation, and harvesting, etc., and in particular, a spectrum specifically designed for accelerating growth during the rice growth period is designed, which greatly shortens the cultivation cycle and maximizes the potential for accelerated growth. Compared with existing rice acceleration methods, this method has the advantages of simple steps, safety, environmental protection, and low cost.

[0006] A method for promoting rice growth using a light source, wherein the light source includes a spectrum of the following parameters:

[0007] The light intensity in the wavelength range of 425 nm - 475 nm was used as the reference light intensity, and the reference light intensity range was 500 -800 μmol / (m 2 s);

[0008] The light intensity in the wavelength range of 380 nm - 425 nm is 0.1 - 0.45 times the reference light intensity;

[0009] The light intensity in the wavelength range of 475 nm - 550 nm is 0.4 - 1 times the reference light intensity;

[0010] The light intensity in the wavelength range of 550 nm - 625 nm is 0.4 – 1 times the reference light intensity;

[0011] The light intensity in the wavelength range of 625 nm - 700 nm is 0.4 – 2.5 times the reference light intensity;

[0012] The wavelength range is 700 nm - 760 nm and the light intensity is 0.15 - 0.45 times the reference light intensity;

[0013] The above spectrum is used to irradiate rice during its growth period.

[0014] Further,

[0015] The rice growth period includes: vegetative growth period and reproductive growth period. The vegetative growth period is the stage from seed germination to the beginning of rice ear differentiation, which is divided into four periods: seedling stage, transplanting stage, tillering stage, and jointing stage; the reproductive growth period is the stage from the beginning of rice ear differentiation to maturity, which is divided into four periods: booting stage, heading stage, flowering and pollination stage, and grain filling stage.

[0016] The photoperiod of the rice during the vegetative growth period is 18-22 h / d of light and 2-4 h / d of darkness; the photoperiod of the rice during the reproductive growth period is 8-12 h / d of light and 12-16 h / d of darkness.

[0017] The distance between the light source and the rice in each period (vegetative growth period and reproductive growth period) is no more than 0.40 m.

[0018] The temperature during the rice growth period is controlled at 25°C - 29°C, and the humidity is controlled at 75% - 85%.

[0019] The CO2 concentration during the rice growth period was controlled at 800-1100 PPM.

[0020] The rice is watered once every three days during the vegetative growth period, with 1 - 1.5 L per group, and each group has 4-6 plants; and watered once every two days during the reproductive growth period, with 1 - 1.5 L per group, and each group has 4-6 plants.

[0021] Furthermore,

[0022] After the seed soaking, germination and pre-sowing treatment steps, the light source is set, and the light intensity, light cycle, temperature, humidity and CO2 concentration are managed and regulated during the rice growth period, and finally the rice is harvested.

[0023] The soaking process includes selecting healthy, complete, disease-free and insect-free rice seeds; washing the rice seeds with clean water to remove surface impurities and residues; placing the washed seeds in a container and adding warm water at 25-28°C to soak for 24-36 hours; this helps to promote water absorption and respiration of the seeds. During the soaking process, the soaking water is replaced in a timely manner to keep the water clean, help the seeds to fully absorb water and ventilate, and promote seed germination.

[0024] The germination process is as follows: after the rice seeds are soaked, the seeds are fished out, put into a gauze bag, wrapped with a wet towel, and put into a 35-38°C oven; the oven door is frequently opened to increase oxygen and ventilate, and the towel wrapped around the seeds is always moistened; when 85% of the seeds have broken through the thorax, the temperature of the rice seeds is lowered to 25-28°C to make the sprouts grow slowly, and the length of the seed sprouts is controlled within 2-3 mm; and the temperature is checked to prevent the oven temperature controller from malfunctioning and causing damage to the seeds.

[0025] The sowing operation is to sow the selected rice seeds on the surface of the sterilized moist paddy soil; and then lightly cover it with a layer of paddy soil.

[0026] The harvesting operation begins with a maturity check. When the rice is ripe, the color of the rice changes from green to golden yellow. Before harvesting, check the maturity of the rice to make sure that most of the rice has turned yellow and mature. Use scissors to harvest manually and cut the rice one by one. After harvesting, the rice needs to be dried in the open air or indoors for 2-3 days to reduce the moisture content and prevent mildew. When the rice is dry, threshing is carried out to separate the rice from the husk. Finally, the rice is stored for later use.

[0027] Compared with the prior art, the present invention has the following advantages and effects:

[0028] The indica and japonica rice crops cultivated by the method of the present invention are grown under the most suitable conditions by optimizing environmental conditions and management measures during the growth process. This includes seed soaking, germination, sowing, rice growth period management and regulation, and harvesting, etc. In particular, a spectrum specifically designed for accelerated growth during the rice growth period is designed, which greatly shortens the cultivation cycle and maximizes the potential for accelerated growth. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 for photos of rice maturing;

[0030] Figure 2 is the spectrum in Example 1;

[0031] Figure 3 is the spectrum in Example 2;

[0032] Figure 4 is the spectrum in Example 3;

[0033] Figure 5 is the spectrum in Example 4;

[0034] Figure 6 is the spectrum in Comparative Example 1;

[0035] Figure 7 This is the spectrum in Comparative Example 2. DETAILED DESCRIPTION

[0036] The present invention is further described and explained in detail below in conjunction with specific implementation cases. Those skilled in the art can implement the present invention based on these descriptions. In addition, the embodiments of the present invention designed in the following cases are only part of the implementation cases of the present invention, rather than all the embodiments. Therefore, based on the embodiments in the present invention, other implementation cases obtained by other technicians without making creative work should all fall within the scope of protection of the present invention.

[0037] Unless otherwise specified, the raw materials used in the implementation of the present invention are all commercially available or available to those skilled in the art; unless otherwise specified, the methods used in the implementation of the present invention are all methods known to those skilled in the art.

[0038] Rice morphological index determination of the present invention:

[0039] The following tests were performed on all rice plants at 10, 20, 30, 40, 50, 60, and 70 days after rice seed sowing:

[0040] (1) Plant height: Use a ruler to measure plant height from the leaf tip to the base of the pseudostem;

[0041] (2) Stem diameter: Use a vernier caliper to measure the base width of the pseudostem and the diameter of the taproot;

[0042] The rice growth time index determination of the present invention:

[0043] The time required for the four stages of rice tillering, heading, heading and flowering, and maturity was recorded.

[0044] Example 1

[0045] 1 Experimental methods

[0046] (1) After the rice seeds are sterilized, they are soaked in water at about 25-28 ℃ for 30 hours, and then wrapped in a wet towel in a 37 ℃ oven for germination for 24 hours. When 85% of the seeds have broken through the thorax, the temperature of the rice seeds is lowered to about 28 ℃, and the length of the seed buds is controlled within 3 mm. Then, the germinated rice seeds are sown on the surface of the sterilized moist paddy field soil on the seedling raising rack, and then lightly covered with a layer of paddy field soil.

[0047] (2) Arrange the spectrally adjustable plant growth lamp on the top of the rice seedling rack, 0.4 m away from the rice, and grow the rice seedlings in a flat surface to make the light field uniform. The temperature of the rice growth environment is 27 ℃, the relative humidity is 80%, and the CO2 concentration during the rice growth period is controlled at 900PPM. The rice is watered once every three days during the vegetative growth stage, 1-1.5 L per group; during the reproductive growth stage, the rice is watered once every two days, 1-1.5 L per group. There are 4-6 plants in each group.

[0048] (3) Set the experimental group as T1, and its growth spectrum is as follows Figure 2 shown.

[0049] The light intensity in the wavelength range of 425 nm - 475 nm was taken as the reference light intensity, and the reference light intensity was 600 μmol / (m 2 s);

[0050] The light intensity in the wavelength range of 380 nm - 425 nm is 0.15 times the reference light intensity;

[0051] The light intensity in the wavelength range of 475 nm - 550 nm is 0.67 times the reference light intensity;

[0052] The light intensity in the wavelength range of 550 nm - 625 nm is 0.79 times the reference light intensity;

[0053] The light intensity in the wavelength range of 625 nm - 700 nm is 2.16 times the reference light intensity;

[0054] The wavelength range is 700 nm - 760 nm and the light intensity is 0.27 times the reference light intensity;

[0055] The above spectrum was used to irradiate rice during the rice growth period. The photoperiod of rice during the vegetative growth stage was 20 h / d of light and 4 h / d of darkness; the photoperiod of rice during the reproductive growth stage was 10 h / d of light and 14 h / d of darkness. All lighting times started at 6:00.

[0056] (4) After 10, 20, 30, 40, 50, 60, and 70 days from rice seed sowing, all rice plants were tested for plant height and stem diameter.

[0057] (5) The full growth period of Xiang Zao Xian 45 is 106 days, and the full growth period of Guang Hong No. 3 is 127 days. When the rice tillers, heads, sets ears, flowers, and matures, record the time required for these four stages.

[0058] The plant height and stem diameter of the T1 group were tested:

[0059]

[0060] The time of tillering, heading, ear formation, flowering and maturity in the T1 group:

[0061]

[0062] The T1 group Xiang Zao Xian 45 blooms on the 53rd day and matures on the 75th day; Guang Hong No. 3 blooms on the 82nd day and matures on the 104th day.

[0063] Example 2

[0064] 1 Experimental methods

[0065] (1) After the rice seeds are sterilized, they are soaked in water at about 25-28 ℃ for 30 hours, and then wrapped in a wet towel in a 37 ℃ oven for germination for 24 hours. When 85% of the seeds have broken through the thorax, the temperature of the rice seeds is lowered to about 28 ℃, and the length of the seed buds is controlled within 3 mm. Then, the germinated rice seeds are sown on the surface of the sterilized moist paddy field soil on the seedling raising rack, and then lightly covered with a layer of paddy field soil.

[0066] (2) Arrange the spectrally adjustable plant growth lamp on the top of the rice seedling rack, 0.4 m away from the rice, and grow the rice seedlings in a flat surface to make the light field uniform. The temperature of the rice growth environment is 27 ℃, the relative humidity is 80%, and the CO2 concentration during the rice growth period is controlled at 900PPM. The rice is watered once every three days during the vegetative growth stage, 1-1.5 L per group; during the reproductive growth stage, the rice is watered once every two days, 1-1.5 L per group. There are 4-6 plants in each group.

[0067] (3) Set the experimental group as T2, and its growth spectrum is as follows Figure 3 shown.

[0068] The light intensity in the wavelength range of 425 nm -475 nm was taken as the reference light intensity, and the reference light intensity was 600 μmol / (m 2 s);

[0069] The light intensity in the wavelength range of 380 nm-425 nm is 0.1 times the reference light intensity;

[0070] The light intensity in the wavelength range of 475 nm - 550 nm is 0.57 times the reference light intensity;

[0071] The light intensity in the wavelength range of 550 nm - 625 nm is 0.64 times the reference light intensity;

[0072] The light intensity in the wavelength range of 625 nm - 700 nm is 0.78 times the reference light intensity;

[0073] The wavelength range is 700 nm - 760 nm and the light intensity is 0.21 times the reference light intensity;

[0074] The above spectrum was used to irradiate rice during the rice growth period. The photoperiod of rice during the vegetative growth stage was 20 h / d of light and 4 h / d of darkness; the photoperiod of rice during the reproductive growth stage was 10 h / d of light and 14 h / d of darkness. All lighting times started at 6:00.

[0075] (4) After 10, 20, 30, 40, 50, 60, and 70 days from rice seed sowing, all rice plants were tested for plant height and stem diameter.

[0076] (5) The full growth period of Xiang Zao Xian 45 is 106 days, and the full growth period of Guang Hong No. 3 is 127 days. When the rice tillers, heads, sets ears, flowers, and matures, record the time required for these four stages.

[0077] The plant height and stem diameter of the T2 group were tested:

[0078]

[0079] The time of tillering, heading, ear formation, flowering and maturity in the T2 group:

[0080]

[0081] The T2 group Xiang Zao Xian 45 blooms on the 49th day and matures on the 71st day; Guang Hong No. 3 blooms on the 79th day and matures on the 101st day.

[0082] Example 3

[0083] 1 Experimental methods

[0084] (1) Arrange the spectrum-adjustable plant growth lamp on the top of the rice seedling rack, 0.4 m away from the rice, and grow the rice seedlings in a flat surface to make the light field uniform.

[0085] (2) After the rice seeds are sterilized, they are soaked in water at about 25-28℃ for 30 hours, and then wrapped in a wet towel in a 37℃ oven for germination for 24 hours. When 85% of the seeds have broken through the thorax, the temperature of the rice seeds is lowered to about 28℃, and the length of the seed buds is controlled within 3 mm. Then, the germinated rice seeds are sown on the surface of the sterilized moist paddy soil, and then lightly covered with a layer of paddy soil. The temperature of the rice growth environment is 27℃, the relative humidity is 80%, and the CO2 concentration during the rice growth period is controlled at 900 PPM. During the vegetative reproductive stage, the rice is watered once every three days, with 1-1.5 L per group; during the reproductive growth stage, the rice is watered once every two days, with 1-1.5 L per group.

[0086] (3) Set the experimental group as T3, and its growth spectrum is as follows Figure 4 shown.

[0087] The light intensity in the wavelength range of 425 nm - 475 nm was taken as the reference light intensity, and the reference light intensity was 600 μmol / (m 2 s);

[0088] The light intensity in the wavelength range of 380 nm - 425 nm is 0.1 times the reference light intensity;

[0089] The light intensity in the wavelength range of 475 nm - 550 nm is 0.75 times the reference light intensity;

[0090] The light intensity in the wavelength range of 550 nm - 625 nm is 0.77 times the reference light intensity;

[0091] The light intensity in the wavelength range of 625 nm - 700 nm is 0.94 times the reference light intensity;

[0092] The wavelength range is 700 nm - 760 nm and the light intensity is 0.27 times the reference light intensity;

[0093] The above spectrum was used to irradiate rice during the rice growth period. The photoperiod of rice during the vegetative growth stage was 20 h / d of light and 4 h / d of darkness; the photoperiod of rice during the reproductive growth stage was 10 h / d of light and 14 h / d of darkness. All lighting times started at 6:00.

[0094] (4) After 10, 20, 30, 40, 50, 60, and 70 days from rice seed sowing, all rice plants were tested for plant height and stem diameter.

[0095] (5) The full growth period of Xiang Zao Xian 45 is 106 days, and the full growth period of Guang Hong No. 3 is 127 days. When the rice tillers, heads, sets ears, flowers, and matures, record the time required for these four stages.

[0096] The plant height and stem diameter of the T3 group were tested:

[0097]

[0098] The time of tillering, heading, ear formation, flowering and maturity in the T3 group:

[0099]

[0100] The T3 group Xiang Zao Xian 45 blooms in 45 days and matures in 67 days; Guang Hong No. 3 blooms in 75 days and matures in 97 days.

[0101] Example 4

[0102] 1 Experimental methods

[0103] (1) After the rice seeds are sterilized, they are soaked in water at about 25-28 ℃ for 30 hours, and then wrapped in a wet towel in a 37 ℃ oven for germination for 24 hours. When 85% of the seeds have broken through the thorax, the temperature of the rice seeds is lowered to about 28 ℃, and the length of the seed buds is controlled within 3 mm. Then, the germinated rice seeds are sown on the surface of the sterilized moist paddy field soil on the seedling raising rack, and then lightly covered with a layer of paddy field soil.

[0104] (2) Arrange the spectrally adjustable plant growth lamp on the top of the rice seedling rack, 0.4 m away from the rice, and grow the rice seedlings in a flat surface to make the light field uniform. The temperature of the rice growth environment is 27 ℃, the relative humidity is 80%, and the CO2 concentration during the rice growth period is controlled at 900PPM. The rice is watered once every three days during the vegetative growth stage, 1-1.5 L per group; during the reproductive growth stage, the rice is watered once every two days, 1-1.5 L per group. There are 4-6 plants in each group.

[0105] (3) Set the experimental group as T4, and its growth spectrum is as follows Figure 5 shown.

[0106] The light intensity in the wavelength range of 425 nm -475 nm was taken as the reference light intensity, and the reference light intensity was 600 μmol / (m 2 s);

[0107] The light intensity in the wavelength range of 380 nm-425 nm is 0.1 times the reference light intensity;

[0108] The light intensity in the wavelength range of 475 nm - 550 nm is 0.51 times the reference light intensity;

[0109] The light intensity in the wavelength range of 550 nm - 625 nm is 0.64 times the reference light intensity;

[0110] The light intensity in the wavelength range of 625 nm - 700 nm is 0.79 times the reference light intensity;

[0111] The wavelength range is 700 nm - 760 nm and the light intensity is 0.21 times the reference light intensity;

[0112] The above spectrum was used to irradiate rice during the rice growth period. The photoperiod of rice during the vegetative growth stage was 20 h / d of light and 4 h / d of darkness; the photoperiod of rice during the reproductive growth stage was 10 h / d of light and 14 h / d of darkness. All lighting times started at 6:00.

[0113] (4) After 10, 20, 30, 40, 50, 60, and 70 days from rice seed sowing, all rice plants were tested for plant height and stem diameter.

[0114] (5) The full growth period of Xiang Zao Xian 45 is 106 days, and the full growth period of Guang Hong No. 3 is 127 days. When the rice tillers, heads, sets ears, flowers, and matures, record the time required for these four stages.

[0115] The plant height and stem diameter of the T4 group were tested:

[0116]

[0117] The time of tillering, heading, ear formation and flowering, and maturity of T4 group:

[0118]

[0119] The T4 group Xiang Zao Xian 45 blooms on the 41st day and matures on the 65th day; Guang Hong No. 3 blooms on the 71st day and matures on the 94th day.

[0120] Comparative Example 1

[0121] 1 Experimental methods

[0122] (1) After the rice seeds are sterilized, they are soaked in water at about 25-28 ℃ for 30 hours, and then wrapped in a wet towel in a 37 ℃ oven for germination for 24 hours. When 85% of the seeds have broken through the thorax, the temperature of the rice seeds is lowered to about 28 ℃, and the length of the seed buds is controlled within 3 mm. Then, the germinated rice seeds are sown on the surface of the sterilized moist paddy field soil on the seedling raising rack, and then lightly covered with a layer of paddy field soil.

[0123] (2) Arrange the spectrally adjustable plant growth lamp on the top of the rice seedling rack, 0.4 m away from the rice, and grow the rice seedlings in a flat surface to make the light field uniform. The temperature of the rice growth environment is 27 ℃, the relative humidity is 80%, and the CO2 concentration during the rice growth period is controlled at 900PPM. The rice is watered once every three days during the vegetative growth stage, 1-1.5 L per group; during the reproductive growth stage, the rice is watered once every two days, 1-1.5 L per group. There are 4-6 plants in each group.

[0124] (3) Set the experimental group as T5, and its growth spectrum is as follows Figure 6 shown.

[0125] The light intensity in the wavelength range of 425 nm -475 nm was taken as the reference light intensity, and the reference light intensity was 600 μmol / (m 2 s);

[0126] The light intensity in the wavelength range of 380 nm-425 nm is 0 times the reference light intensity;

[0127] The light intensity in the wavelength range of 475 nm - 550 nm is 0.54 times the reference light intensity;

[0128] The light intensity in the wavelength range of 550 nm - 625 nm is 0.51 times the reference light intensity;

[0129] The light intensity in the wavelength range of 625 nm - 700 nm is 0.35 times the reference light intensity;

[0130] The wavelength range is 700 nm - 760 nm and the light intensity is 0.08 times the reference light intensity;

[0131] The above spectrum was used to irradiate rice during the rice growth period. The photoperiod of rice during the vegetative growth stage was 20 h / d of light and 4 h / d of darkness; the photoperiod of rice during the reproductive growth stage was 10 h / d of light and 14 h / d of darkness. All lighting times started at 6:00.

[0132] (4) After 10, 20, 30, 40, 50, 60, and 70 days from rice seed sowing, all rice plants were tested for plant height and stem diameter.

[0133] (5) The full growth period of Xiang Zao Xian 45 is 106 days, and the full growth period of Guang Hong No. 3 is 127 days. When the rice tillers, heads, sets ears, flowers, and matures, record the time required for these four stages.

[0134] The plant height and stem diameter of the T5 group were tested:

[0135]

[0136] The time of tillering, heading, ear formation and flowering, and maturity of T5 group:

[0137]

[0138] T5 group Xiang Zao Xian 45 blooms on the 89th day and matures on the 110th day; Guang Hong No. 3 blooms on the 97th day and matures on the 130th day.

[0139] Comparative Example 2

[0140] 1 Experimental methods

[0141] (1) After the rice seeds are sterilized, they are soaked in water at about 25-28 ℃ for 30 hours, and then wrapped in a wet towel in a 37 ℃ oven for germination for 24 hours. When 85% of the seeds have broken through the thorax, the temperature of the rice seeds is lowered to about 28 ℃, and the length of the seed buds is controlled within 3 mm. Then, the germinated rice seeds are sown on the surface of the sterilized moist paddy field soil on the seedling raising rack, and then lightly covered with a layer of paddy field soil.

[0142] (2) Arrange the spectrally adjustable plant growth lamp on the top of the rice seedling rack, 0.4 m away from the rice, and grow the rice seedlings in a flat surface to make the light field uniform. The temperature of the rice growth environment is 27 ℃, the relative humidity is 80%, and the CO2 concentration during the rice growth period is controlled at 900PPM. The rice is watered once every three days during the vegetative growth stage, 1-1.5 L per group; during the reproductive growth stage, the rice is watered once every two days, 1-1.5 L per group. There are 4-6 plants in each group.

[0143] (3) Set the experimental group as T6, and its growth spectrum is as follows Figure 7 shown.

[0144] The light intensity in the wavelength range of 425 nm -475 nm was taken as the reference light intensity, and the reference light intensity was 600 μmol / (m 2 s);

[0145] The light intensity in the wavelength range of 380 nm-425 nm is 0 times the reference light intensity;

[0146] The light intensity in the wavelength range of 475 nm - 550 nm is 0.08 times the reference light intensity;

[0147] The light intensity in the wavelength range of 550 nm - 625 nm is 0.08 times the reference light intensity;

[0148] The light intensity in the wavelength range of 625 nm - 700 nm is 0.79 times the reference light intensity;

[0149] The wavelength range is 700 nm - 760 nm and the light intensity is 0 times the reference light intensity;

[0150] The above spectrum was used to irradiate rice during the rice growth period. The photoperiod of rice during the vegetative growth stage was 20 h / d of light and 4 h / d of darkness; the photoperiod of rice during the reproductive growth stage was 10 h / d of light and 14 h / d of darkness. All lighting times started at 6:00.

[0151] (4) After 10, 20, 30, 40, 50, 60, and 70 days from rice seed sowing, all rice plants were tested for plant height and stem diameter.

[0152] (5) The full growth period of Xiang Zao Xian 45 is 106 days, and the full growth period of Guang Hong No. 3 is 127 days. When the rice tillers, heads, sets ears, flowers, and matures, record the time required for these four stages.

[0153] The plant height and stem diameter of the T6 group were tested:

[0154]

[0155] The time of tillering, heading, ear formation and flowering, and maturity of T6 group:

[0156]

[0157] The T6 Xiang Zao Xian 45 blooms on the 85th day and matures on the 105th day; the Guang Hong No. 3 blooms on the 95th day and matures on the 125th day.

[0158] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A method for promoting rice growth using a light source, characterized in that: The light source includes a spectrum of the following parameters: The light intensity in the wavelength range of 425 nm - 475 nm is taken as the reference light intensity, and the reference light intensity range is 500 - 800 μmol / (m 2 s); The light intensity in the wavelength range of 380 nm - 425 nm is 0.1 - 0.45 times the reference light intensity; The light intensity in the wavelength range of 475 nm - 550 nm is 0.4 - 1 times the reference light intensity; The light intensity in the wavelength range of 550 nm - 625 nm is 0.4 – 1 times the reference light intensity; The light intensity in the wavelength range of 625 nm - 700 nm is 0.4 – 2.5 times the reference light intensity; The wavelength range is 700 nm - 760 nm and the light intensity is 0.15 - 0.45 times the reference light intensity; The above spectrum is used to irradiate rice during its growth period.

2. The method according to claim 1, characterized in that: The rice growth period includes: a vegetative growth period and a reproductive growth period; the vegetative growth period is the stage from seed germination to the beginning of rice ear differentiation, which is divided into four periods: seedling stage, transplanting stage, tillering stage, and jointing stage; the reproductive growth period is the stage from the beginning of rice ear differentiation to maturity, which is divided into four periods: booting stage, heading stage, flowering and pollination stage, and filling stage.

3. The method according to claim 1 or 2, characterized in that: The photoperiod of the rice during the vegetative growth period is 18-22 h / d of light and 2-4 h / d of darkness; the photoperiod of the rice during the reproductive growth period is 8-12 h / d of light and 12-16 h / d of darkness.

4. The method according to claim 1, 2 or 3, characterized in that: The distance between the light source and the rice is no more than 0.40 m.

5. The method according to claim 1, characterized in that The temperature during the rice growth period is controlled at 25°C-29°C, and the humidity is controlled at 75%-85%.

6. The method according to claim 1, characterized in that The CO2 concentration during the rice growth period was controlled at 800-1100 PPM.

7. The method according to claim 1, characterized in that The rice is watered once every three days during the vegetative growth period, with 1-1.5 L per group, and each group has 4-6 rice plants; during the reproductive growth period, the rice is watered once every two days, with 1-1.5 L per group, and each group has 4-6 rice plants.

8. The method according to claim 1, characterized in that After the seed soaking, germination and pre-sowing treatment steps, the light source is set, and the light intensity, light cycle, temperature, humidity and CO2 concentration are managed and regulated during the rice growth period, and finally the rice is harvested.

9. The method according to claim 8, characterized in that The soaking process includes selecting healthy, complete, disease-free and insect-free rice seeds; washing the rice seeds with clean water to remove surface impurities and residues; placing the washed seeds in a container and adding warm water at 25-28°C to soak for 24-36 hours; The germination process is as follows: after the rice seeds are soaked, the seeds are fished out, put into a gauze bag, wrapped with a wet towel, and put into a 35-38°C oven; the oven door is frequently opened to increase oxygen and ventilate, and the towel wrapped around the seeds is always moistened; when 85% of the seeds have broken through the thorax, the temperature of the rice seeds is lowered to 25-28°C to allow the sprouts to grow slowly, and the length of the seed sprouts is controlled within 2-3 mm; The sowing operation is to sow the selected rice seeds on the surface of the sterilized moist paddy soil; and then lightly cover it with a layer of paddy soil.

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