An artificial light environment to promote the growth of cereal crop seedlings

Abstract

The application discloses an artificial light environment for promoting the growth of cereal crop seedlings, wherein the light spectrum of the light environment is composed of blue light and red light, the proportion of the blue light is 10-25% in terms of the integral percentage of the light quality spectrum, and the proportion of the red light is 90-75%; wherein the peak value of the blue light is 425-445 nm, and the peak value of the red light is 680-700 nm. The light environment provided by the application is mainly used for light source irradiation treatment of the cereal crop seedlings in the seedling stage, so as to realize the goal of cultivating strong seedlings.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of plant cultivation, and particularly relates to an artificial light environment for promoting the growth of cereal crop seedlings. BACKGROUND

[0002] Traditional field seedling raising methods and greenhouse seedling raising are often limited by some natural factors. Insufficient light leads to weak growth of seedlings, which cannot meet the market demand for plant seedlings. With the emergence of artificial light plant factories, seedling production is realized through full artificial light sources, which can not only cultivate high-quality and healthy seedlings, but also quantitatively and timely meet the market demand for seedlings according to market demand. At present, there are some reports on light spectrum for promoting the growth of plant seedlings, such as CN201810326519.7 "Light spectrum and proportion suitable for growth of European spruce seedlings", CN202411022910.X "Light environment culture regulation and control method for accelerating potato tissue seedling tuber swelling", and CN201911415445.5 "Method for promoting growth of tomato seedlings in seedling stage and application thereof in plant factory", but there are still the following problems. The above methods are all specific to a specific plant species and propose a special light spectrum, which is less applicable to a seedling factory with diverse seedling demand. SUMMARY

[0003] Therefore, the application aims to provide an artificial light environment for promoting the growth of cereal crop seedlings, which is mainly used for light source irradiation treatment of cereal crop seedlings in the seedling stage to achieve the goal of cultivating strong seedlings.

[0004] The specific technical scheme adopted by the application is as follows.

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

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

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

[0008] Preferably, the proportion of red light is 78-88%.

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

[0010] Accordingly, the application also provides a method for promoting the growth of cereal crop seedlings, characterized in that the method comprises the steps of: sowing the cereal crop seeds in a seedling tray, and placing the seedling tray in the artificial light environment for cultivation.

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

[0012] Preferably, the cereal crop seeds are first placed in warm water at 55℃, fully stirred, the water temperature is controlled at 50-60℃, soaked for 20 minutes, naturally cooled, placed at 4℃ overnight, and then sowed in the seedling tray.

[0013] The application has the beneficial effect that the application provides an artificial light environment for promoting the growth of cereal crop seedlings, which is mainly used for light treatment after sowing of cereal crop seeds, so as to achieve the goal of cultivating strong seedlings. The light environment with a blue light proportion of 10-25%, a red light proportion of 90-75%, a blue light peak value of 425-445nm, and a red light peak value of 680-700nm can be suitable for rapid seedling cultivation of various seedlings. DETAILED DESCRIPTION

[0014] The application will be further described in detail below in combination with examples, but the embodiments of the application are not limited thereto. Various substitutions and modifications can be made according to ordinary technical knowledge and conventional means in the art without departing from the technical idea of the application, and all of them should be included in the scope of the application.

[0015] Examples 1-9

[0016] Sorghum seedling cultivation:

[0017] 1. The sorghum seeds are placed in warm water at 55℃, fully stirred, the water temperature is controlled at 50-60℃, soaked for 20 minutes, and naturally cooled.

[0018] 2. The seeds are taken out and placed at 4℃ overnight to keep the seeds moist.

[0019] 3. The seeds are taken out, sowed in the seedling tray, and placed in a light environment with different light combinations, the light intensity is 20μmol / ㎡ / s, the light illumination time is 16 hours, the dark time is 8 hours, the environmental temperature is 21-25℃, and the environmental humidity is 70-95%.

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

[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 light is 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 light is combined with blue light, R3 shows higher plant height and fresh weight than other red light. Overall, the light combination of B1R3 can obtain the maximum plant height and fresh weight, that is, the light combination of blue light peak at 425-445 nm and red light peak at 680-700 nm has obvious promoting effect on the growth of cereal seedlings.

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

[0024] No. 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 Control example W 44.2 2.006

[0025] Examples 10-16

[0026] Oat seedling:

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

[0028] 2. Take out and place at 4°C overnight, keep the seeds moist;

[0029] 3. Take out the seeds, sow in the seedling tray, and place in different light combinations of light environment, light intensity 300 μmol / ㎡ / s, light for 16 hours, dark for 8 hours, environmental temperature 21-25°C, environmental humidity 70-95%;

[0030] 4. Light source: White light (W) as control, light combinations of Examples 10-16 are shown in Table 2, wherein: B, blue light peak at 425-445 nm; R, red light peak at 680-700 nm.

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

[0032] The results show (as shown in Table 2) that with the increase of the proportion of red light, the plant height shows an increasing trend, and the plant fresh weight shows a trend of first decreasing and then rising. When the proportion of red light is 75%-87.5%, the plant height and fresh weight reach a higher level. Among them, when the proportion of red light is 87.5%, the plant height and fresh weight are the highest. The red and blue light combination has obvious promoting effect on the growth of cereal seedlings.

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

[0034] No. Light combination Plant height (cm) Fresh weight (g) Example 10 B:R=7:1 12.86 3.065 Example 11 B:R=6:2 11.36 3.125 Example 12 B:R=5:3 12.68 2.779 Example 13 B:R=4:4 12.7 2.762 Example 14 B:R=3:5 12.35 2.751 Example 15 B:R=2:6 14.87 3.61 Example 16 B:R=1:7 16.5 3.683 Control example W 12.43 2.472

[0035] Examples 17-22

[0036] Oat seedling:

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

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

[0039] 3. Take out the seeds, sow in the seedling tray, and place in different light combinations, light intensity 300μmol / ㎡ / s, light for 16 hours, dark for 8 hours, environment temperature 21-25℃, environment humidity 70-95%;

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

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

[0042] The results show (as shown in Table 3) that with the increase of the proportion of red light, the plant tiller number and biomass increase. When the proportion of red light is 85.7% (examples 18, 20), the plant tiller number and biomass are higher than that of the treatment with 71.4% red light (examples 17, 19). When the proportion of red light is 78.6% (example 22), the tiller number and biomass are also higher than that of the treatment with 50% red light (example 21). High proportion of red light has obvious promoting effect on the growth of cereal seedlings.

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

[0044] No. Light combination Tiller number (piece) Biomass (g) Example 17 B:R:G=2:10:2 1.4 2.614 Example 18 B:R:G=1:12:1 1.6 3.137 Example 19 B:R:O=2:10:2 1.5 2.7 Example 20 B:R:O=1:12:1 1.8 2.8 Example 21 B:R:G:O=2:6:2:2 1 2.324 Example 22 B:R:G:O=1:11:1:1 1.1 2.592 Control example W 0 1.77

[0045] Although the above-mentioned embodiments have been described, those skilled in the art can make further changes and modifications to the embodiments once they know the basic inventive concept, and therefore the above-mentioned embodiments are only examples of the present application, and are not intended to limit the patent protection scope of the present application, and any equivalent structure or equivalent process transformation made by using the content of the present application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for promoting the growth of cereal crop seedlings, characterized in that, The cereal crop is oats, and the specific method is as follows: (1) Place oat seeds in 55℃ warm water, stir thoroughly, control the water temperature between 50-60℃, soak for 20 minutes, and let cool naturally; (2) Remove and place at 4℃ overnight, keeping the seeds moist; (3) Take out the seeds, sow them in a seedling tray, and place them under different light combinations, with a light intensity of 300 μmol / m² / s, 16 hours of light and 8 hours of darkness, an ambient temperature of 21-25℃, and an ambient humidity of 70-95%; (4) Light source: The artificial light environment consists of red light, blue light and orange light, of which: the peak value of blue light is 435 nm; the peak value of orange light is 560 nm; the peak value of red light is 695 nm; the ratio of blue light, red light and orange light is 1:12:1, and the proportion of red light is 85.7%.