Artificial light environment for promoting growth of cereal crop seedlings

Abstract

The invention discloses an artificial light environment for promoting the growth of cereal crop seedlings, the light environment spectrum is composed of blue light and red light, and in terms of light quality spectrum integral percentage, the blue light accounts for 10-25%, and the red light accounts for 90-75%; wherein the peak value of the blue light ranges from 425 nm to 445 nm, and the peak value of the red light ranges from 680 nm to 700 nm. The light environment provided by the invention is mainly used for carrying out light source irradiation treatment in the seedling stage of cereal crops, and the purpose of cultivating strong seedlings is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of plant cultivation, and in particular relates to an artificial light environment for promoting the growth of cereal crop seedlings. Background Art

[0002] Traditional field seedling raising methods and greenhouse seedling raising methods are often restricted by some natural factors. Insufficient light leads to weak growth of seedlings, which can no longer meet the market demand for plant seedlings. With the emergence of artificial light plant factories, the production of seedlings can be achieved through fully artificial light sources, which can not only cultivate high-quality and strong seedlings, but also can meet the market demand for seedling quantity quantitatively and regularly according to market demand. At present, there have been some reports on spectra that promote the growth of plant seedlings, such as CN201810326519.7 "A spectrum and ratio adapted to the growth of European spruce seedlings", CN202411022910.X "A light environment cultivation and regulation method for accelerating the expansion of potato tissue seedling tubers", and CN201911415445.5 "A method for promoting the growth of tomato seedlings and its application in plant factories", but the following problems still exist. The above-mentioned spectra are all proposed for specific plant species, and for a seedling factory that requires seedling diversity, the applicability is poor. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide an artificial light environment for promoting the growth of cereal crop seedlings, which is mainly used for light source irradiation treatment during the seedling stage of cereal crops to achieve the goal of cultivating strong seedlings.

[0004] The specific technical solution adopted by the present invention is:

[0005] An artificial light environment for promoting the growth of cereal crop seedlings, the light environment comprising red light, wherein the red light accounts for 75-90% in terms of light quality spectrum integral percentage; and the red light peak is at 680-700nm.

[0006] Preferably, the light environment is composed of red light and blue light, and in terms of the integrated percentage of the light quality spectrum, the blue light accounts for 10-25%, and the peak value of the blue light is at 425-445nm.

[0007] Preferably, the ratio of red light to blue light is 3-9:1.

[0008] Preferably, the red light accounts for 78-88%.

[0009] Preferably, in the light environment, the light intensity is 20-300 μmol / ㎡ / s, and the light cycle is 16 h / d.

[0010] Correspondingly, the present invention also provides a method for promoting the growth of cereal crop seedlings, characterized in that it includes sowing cereal crop seeds in a seedling tray and then placing the seedling tray in the above-mentioned artificial light environment for cultivation.

[0011] Preferably, when the seedling tray is placed in an artificial light environment for cultivation, the ambient temperature is 21-25° C. and the ambient humidity is 70-95%.

[0012] Preferably, the cereal crop seeds are first placed in 55°C warm water, stirred thoroughly, the water temperature is controlled between 50-60°C, soaked for 20 minutes, naturally cooled and placed at 4°C overnight before being sown in seedling trays.

[0013] The beneficial effects of the present invention are as follows: the present invention provides an artificial light environment for promoting the growth of cereal crop seedlings, which is mainly used for light treatment of cereal crop seeds after sowing to achieve the goal of cultivating strong seedlings. The light environment in which the blue light accounts for 10-25%, the red light accounts for 90-75%, the blue light peak is at 425-445nm, and the red light peak is at 680-700nm can be applied to the rapid cultivation of a variety of seedlings. DETAILED DESCRIPTION

[0014] The present invention is further described in detail below in conjunction with embodiments, but the embodiments of the present invention are not limited thereto. Without departing from the above-mentioned technical concept of the present invention, various substitutions and changes are made according to common technical knowledge and customary means in the field, which should all be included in the scope of the present invention.

[0015] Examples 1-9

[0016] Sorghum seedling cultivation:

[0017] 1. Place sorghum seeds in 55℃ warm water, stir thoroughly, control the water temperature between 50-60℃, soak for 20 minutes, and cool naturally;

[0018] 2. Take out and place at 4℃ overnight to keep the seeds moist;

[0019] 3. Take out the seeds, sow them in seedling trays, and place them in a light environment with different light combinations, with a light intensity of 20 μmol / ㎡ / s, 16 hours of light, 8 hours of darkness, an ambient temperature of 21-25℃, and an ambient humidity of 70-95%;

[0020] 4. Light source: Taking white light (W) as a control, the light combinations of Examples 1-9 are shown in Table 1, wherein: B1, blue light peak is at 425-445nm; B2, blue light peak is at 445-465nm; B3, blue light peak is at 470-490nm; R1, red light peak is at 620-640nm; R2, red light peak is at 650-670nm; R3, red light peak is at 680-700nm.

[0021] 5. After 21 days of growth, measure plant height and fresh weight;

[0022] 6. The results show (as shown in Table 1) that when different blue lights are combined with R1 and R2, B2 shows the maximum plant height and fresh weight, followed by B1, and when combined with R3, B1 can obtain the maximum plant height and fresh weight. When different red lights are combined with blue lights, the combination of R3 shows higher plant height and fresh weight than other red lights. In general, the light combination of B1R3 can obtain the maximum plant height and fresh weight, that is, the light combination with a blue light peak of 425-445nm and a red light peak of 680-700nm has a significant promoting effect on the growth of grain seedlings.

[0023] Table 1 Plant height and fresh weight under different light combination conditions

[0024] serial number Light combination Plant height (cm) Fresh weight(g) Example 1 B1R1 36.45 1.613 Example 2 B2R1 51.93 3.87 Example 3 B3R1 35.08 1.546 Example 4 B1R2 31.4 1.268 Example 5 B2R2 42.95 2.396 Example 6 B3R2 31.12 1.355 Example 7 B1R3 65.23 4.084 Example 8 B2R3 63.74 4.081 Example 9 B3R3 45.16 2.167 Comparison Example W 44.2 2.006

[0025] Examples 10-16

[0026] Oat seedlings:

[0027] 1. Place oat seeds in 55℃ warm water, stir thoroughly, control the water temperature between 50-60℃, soak for 20 minutes, and cool naturally;

[0028] 2. Take out and place at 4℃ overnight to keep the seeds moist;

[0029] 3. Take out the seeds, sow them in seedling trays, and place them in a light environment with different light combinations, with a light intensity of 300 μmol / ㎡ / s, 16 hours of light, 8 hours of darkness, an ambient temperature of 21-25℃, and an ambient humidity of 70-95%;

[0030] 4. Light source: Taking white light (W) as a reference, the light combinations of Examples 10-16 are shown in Table 2, where: B, the peak of blue light is at 425-445nm; R, the peak of red light is at 680-700nm.

[0031] 5. After 21 days of growth, measure plant height and fresh weight;

[0032] The results showed (as shown in Table 2) that, at different red-blue light ratios, as the proportion of red light increased, plant height showed an increasing trend, and plant fresh weight showed a trend of first decreasing and then increasing. When the proportion of red light reached 75%-87.5%, both plant height and fresh weight reached a high level. When the proportion of red light was 87.5%, both plant height and fresh weight were the highest. This red-blue light ratio had a significant promoting effect on the growth of grain seedlings.

[0033] Table 2 Plant height and fresh weight under different light ratio conditions

[0034] serial number Light Ratio Plant height (cm) Fresh weight(g) Example 10 B:R=7:1 12.86 3.065 Embodiment 11 B:R=6:2 11.36 3.125 Example 12 B:R=5:3 12.68 2.779 Embodiment 13 B:R=4:4 12.7 2.762 Embodiment 14 B:R=3:5 12.35 2.751 Embodiment 15 B:R=2:6 14.87 3.61 Example 16 B:R=1:7 16.5 3.683 Comparison Example W 12.43 2.472

[0035] Examples 17-22

[0036] Oat seedlings:

[0037] 1. Place oat seeds in 55℃ warm water, stir thoroughly, control the water temperature between 50-60℃, soak for 20 minutes, and cool naturally;

[0038] 2. Take out and place at 4℃ overnight to keep the seeds moist;

[0039] 3. Take out the seeds, sow them in seedling trays, and place them in a light environment with different light combinations, with a light intensity of 300 μmol / ㎡ / s, 16 hours of light, 8 hours of darkness, an ambient temperature of 21-25℃, and an ambient humidity of 70-95%;

[0040] 4. Light source: Taking white light (W) as a control, the light combinations of Examples 17-22 are shown in Table 3, where: B, blue light peak is at 435nm; G, green light peak is at 526nm; O, orange light peak is at 560nm; R, red light peak is at 695nm.

[0041] 5. After 21 days of growth, measure the number of tillers and biomass of the plants, and calculate the average number of tillers and biomass;

[0042] The results show (as shown in Table 3) that when the light combination ratio is different, as the red light ratio increases, the number of plant tillers and biomass increase. When the red light ratio is 85.7% (Examples 18 and 20), the number of plant tillers and biomass are higher than the treatment with a red light ratio of 71.4% (Examples 17 and 19). When the red light ratio is 78.6% (Example 22), the number of tillers and biomass are also higher than the treatment with a red light ratio of 50% (Example 21). The high red light ratio has a significant promoting effect on the growth of cereal seedlings.

[0043] Table 3 Plant height and fresh weight under different light ratio conditions

[0044] serial number Light combination ratio Number of tillers Biomass (g) Embodiment 17 B:R:G=2:10:2 1.4 2.614 Embodiment 18 B:R:G=1:12:1 1.6 3.137 Embodiment 19 B:R:O=2:10:2 1.5 2.7 Embodiment 20 B:R:O=1:12:1 1.8 2.8 Embodiment 21 B:R:G:O=2:6:2:2 1 2.324 Embodiment 22 B:R:G:O=1:11:1:1 1.1 2.592 Comparison Example W 0 1.77

[0045] Although the above embodiments have been described, once those skilled in the art know the basic creative concepts, they can make additional changes and modifications to these embodiments. Therefore, the above description is only an embodiment of the present invention and does not limit the patent protection scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An artificial light environment for promoting the growth of cereal crop seedlings, characterized in that: The light environment includes red light, and in terms of light quality spectrum integral percentage, red light accounts for 75-90%; the red light peak is at 680-700nm.

2. The artificial light environment for promoting the growth of cereal crop seedlings according to claim 1, characterized in that: The light environment is composed of red light and blue light. In terms of light quality spectrum integral percentage, blue light accounts for 10-25%, and the peak of blue light is at 425-445nm.

3. The artificial light environment for promoting the growth of cereal crop seedlings according to claim 2, characterized in that: The ratio of red light to blue light is 3-9:

1.

4. The artificial light environment for promoting the growth of cereal crop seedlings according to claim 1, characterized in that: Red light accounts for 78-88%.

5. An artificial light environment for promoting the growth of cereal crop seedlings according to any one of claims 1 to 4, characterized in that: In the light environment, the light intensity is 20-300 μmol / ㎡ / s, and the light cycle is 16 h / d.

6. A method for promoting the growth of cereal crop seedlings, characterized in that: The method comprises sowing cereal crop seeds in a seedling tray, and then placing the seedling tray in the artificial light environment described in claim 5 for cultivation.

7. A method for promoting the growth of cereal crop seedlings according to claim 6, characterized in that: When the seedling tray is placed in an artificial light environment for cultivation, the ambient temperature is 21-25°C and the ambient humidity is 70-95%.

8. A method for promoting the growth of cereal crop seedlings according to claim 6, characterized in that: First place the cereal crop seeds in 55℃ warm water, stir thoroughly, control the water temperature between 50-60℃, soak for 20 minutes, cool naturally and place at 4℃ overnight, then sow in the seedling tray.