A method for cultivating allium tuberosum with LED as light supplement

Abstract

The application discloses a kind of LED as light supplement light source's allium tuberosum cultivation method, belong to plant cultivation technical field.The application described with LED as light supplement light source's allium tuberosum cultivation method includes the following steps: after allium tuberosum cutting, allium tuberosum is carried out light supplement treatment every day until 30d after allium tuberosum harvest stops;Then allium tuberosum is cut, and then repeat the above steps;The light supplement treatment includes: during the day, natural light, after night without natural light, with LED as light source, light supplement is carried out for 5h.The application provides a kind of efficient energy-saving, precision and can promote the light supplement scheme of allium tuberosum growth and quality improvement.By accurately controlling light source, light intensity, red and blue light ratio in light source and light supplement time, the yield and quality of allium tuberosum are effectively improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of plant cultivation, more particularly relates to a method for cultivating Allium mongolicum with LED as light supplement. BACKGROUND

[0002] Allium mongolicum is a perennial herb of the Liliaceae Allium genus, and is a wild vegetable unique to the desert, semi-desert grassland and sandy land in northwest China. It has both edible and medicinal values. When eaten, it has a fresh and spicy taste, and can be used for salad, stir-frying, pickling, etc., enriching the table dishes. In terms of medicine, it has the effects of stimulating appetite, digesting food and killing insects, and is rich in vitamins, minerals and dietary fiber. It is a natural healthy food favored by consumers, and the market demand is increasing.

[0003] With the increasing demand for Allium mongolicum in the market, traditional wild collection cannot meet the supply, and facility cultivation emerges as the times require. Although facility cultivation can achieve year-round production by controlling the environment and ensure stable market supply, the problem of light becomes the key factor restricting the growth of Allium mongolicum. The light intensity in the facility is weak, the time is short, and the light quality is unbalanced, which is significantly different from the strong light and long day desert environment of Allium mongolicum in the wild, causing the growth and development of Allium mongolicum to be hindered, the plant to be thin and weak, the leaf to be yellow, and the tillering to be reduced, which seriously affects the yield and quality of Allium mongolicum.

[0004] In the research of improving the quality, yield and growth index of Allium mongolicum, the previous researches were mainly focused on soil improvement, fertilizer optimization and irrigation technology adjustment. For example, adding a certain proportion of organic fertilizer and sandy soil can improve the soil permeability and fertility, promote the growth of root system, and enhance the degree of plant robustness; reasonable adjustment of the proportion of nitrogen, phosphorus and potassium fertilizer elements can improve the stress resistance of Allium mongolicum, make the leaf thicker and greener. However, these researches have little effect on solving the core problem of insufficient light.

[0005] Moreover, the previous light supplement often uses high-pressure sodium lamps and fluorescent lamps, but both have many defects. High-pressure sodium lamps generate a lot of heat and have high energy consumption, which increases the cost of greenhouse cooling and makes it difficult to accurately control the light quality ratio; fluorescent lamps have low light efficiency and short service life, and the cost of frequent replacement of lamps is high, and they also contain harmful substances such as mercury, which is not conducive to environmental protection.

[0006] Therefore, it is extremely urgent to develop other light supplement methods for Allium mongolicum cultivation to improve the yield and quality of Allium mongolicum. SUMMARY

[0007] The purpose of the present application is to provide a method for cultivating Allium mongolicum with LED as light supplement, to solve the problems existing in the prior art, to help explore the light supplement strategy suitable for the growth of Allium mongolicum, to improve the yield and quality of Allium mongolicum, to promote the development of Allium mongolicum facility cultivation industry, to realize the win-win of ecological, economic and social benefits, and to provide an example for light regulation and control in vegetable facility cultivation.

[0008] To achieve the above object, the present application provides the following scheme:

[0009] One of the technical solutions of the present application: a method for cultivating Allium mongolicum Regel by using LED as light supplement source, comprising the following steps:

[0010] After the Allium mongolicum Regel is cut, the Allium mongolicum Regel is subjected to light supplement treatment every day until the Allium mongolicum Regel is harvested again; then the Allium mongolicum Regel is cut, and the above steps are repeated.

[0011] The light supplement treatment comprises: natural light illumination during the day, and light supplement by using LED as light source for 5 hours after no natural light illumination at night.

[0012] Preferably, the light supplement time is from 6:30 pm to 11:30 pm.

[0013] In the present application, the output ratio of red light and blue light during the light supplement process is preferably 6:4-9:1, and further preferably 7:3.

[0014] In the present application, the light intensity of the light supplement is preferably 100-300 μmol·m -2 ·s -1 , and further preferably 200 μmol·m -2 ·s -1 .

[0015] Preferably, the method for cultivating Allium mongolicum Regel by using LED as light supplement source further comprises water and fertilizer management of the Allium mongolicum Regel.

[0016] Preferably, the water and fertilizer management comprises water management and fertilizer management; the water management comprises: watering (watering thoroughly) after each cutting, and watering once every 10-15 days in summer (adjusting according to soil moisture) and once every 15-20 days in winter (adjusting according to soil moisture) during the growth period after the Allium mongolicum Regel is cut; the fertilizer management comprises: after the Allium mongolicum Regel is cut 1-2 times, if the Allium mongolicum Regel shows the symptoms of slow growth and yellow leaves due to lack of fertilizer and water, topdressing should be performed, and 8-12 kg of ammonium nitrate should be applied per mu.

[0017] Further, the cultivation method of the Allium mongolicum Regel comprises but is not limited to greenhouse cultivation.

[0018] The second technical solution of the present application: a method for improving the yield and quality of Allium mongolicum Regel, comprising the following steps: cultivating the Allium mongolicum Regel by using the above method for cultivating Allium mongolicum Regel by using LED as light supplement source.

[0019] The technical principle of the present application is as follows:

[0020] The application provides a light supplement scheme for promoting the growth and quality improvement of Allium mongolicum with high efficiency, energy saving, precision, etc.

[0021] The LED has the advantage of precise light quality adjustment, can customize red light, blue light, green light and other spectral combinations according to the needs of different growth stages of Allium mongolicum, promote photosynthesis, morphogenesis and secondary metabolism; at the same time, it is energy-saving and efficient, energy consumption is reduced by 30-50% compared with traditional light sources, can greatly reduce production cost; long service life, up to 50000h, easy to maintain, reduce labor and material resources investment; as a cold light source, less heating, reduce the burden of greenhouse cooling in summer, conducive to stable temperature and humidity control. Compared with high-pressure sodium lamps and fluorescent lamps, it has the characteristics of more energy-saving and efficient, and can be precisely controlled.

[0022] The application controls the light intensity in the range of 100-300 μmol·m -2 ·s -1 , which can effectively promote the photosynthesis of Allium mongolicum, improve the photosynthetic efficiency, accelerate the growth process of Allium mongolicum, and effectively improve the yield and quality of Allium mongolicum. When the light intensity is less than 100 μmol·m -2 ·s -1 , the photosynthesis of Allium mongolicum will be inhibited due to insufficient energy supply, resulting in a decrease in photosynthetic rate. This will slow down the growth of Allium mongolicum, the leaves will become small and yellow, the whole plant will look weak, the number of tillers will decrease, and thus the yield will be seriously affected. In addition, the synthesis of flavor substances will be blocked, the aroma of Allium mongolicum will be weakened, the taste will be poor, and finally the quality will be reduced. When the light intensity exceeds 300 μmol·m -2 ·s -1 , the strong light will cause photoinhibition, damage the photosynthetic structure of Allium mongolicum leaves, cause damage to photosynthetic pigments, and significantly reduce photosynthetic efficiency. In this case, the leaves of Allium mongolicum may appear burning, drying and curling, etc., the growth and development are obviously inhibited, and the yield is greatly reduced. At the same time, under strong light stress, the accumulation of secondary metabolites in Allium mongolicum is abnormal, which further affects its quality, and the overall quality is greatly discounted.

[0023] Plant photosynthesis mainly uses light in the wavelength range of 400-700 nm, and in the visible spectrum (380-760 nm) of the light source, the light absorbed by plants accounts for about 60-65% of the physiological radiation light, among which the absorption of red and orange light in the range of 610-720 nm accounts for a large proportion. Based on this, the present application selects an LED with an output ratio of red light to blue light of 6:4-9:1 as a light supplementing light source, which can best meet the absorption needs of Allium mongolicum for red light and blue light. Because red light is beneficial to the synthesis of carbohydrates of Allium mongolicum and promotes the growth and flowering of the plant, and blue light has an important influence on physiological processes such as protein synthesis, stomatal opening and phototropism, appropriate proportioning can synergistically promote the photosynthesis, growth and development and metabolic process of Allium mongolicum, thereby enhancing the light supplementing effect and improving the yield and quality of Allium mongolicum. Exceeding this range will lead to an imbalance in the proportion of red and blue light. If the proportion of red light is too high and the proportion of blue light is insufficient, Allium mongolicum may have problems such as slender stem, thin and fragile leaves, and decreased stress resistance, and may also affect the morphological development and nutrient accumulation of Allium mongolicum. If the proportion of blue light is too high and the proportion of red light is insufficient, the growth rate of Allium mongolicum will slow down, the tillering will decrease, the yield will decrease, and the leaf color may be abnormal, the taste and flavor may be poor, and the quality and market value of Allium mongolicum will be seriously affected.

[0024] The present application performs 5h of light supplementing operation from 6:30pm to 11:30pm, combines light supplementing under sunlight and darkness conditions, and on the basis of improving the light effect, can also simulate the change of natural light duration, provide more suitable light period for Allium mongolicum, promote self-regulation of Allium mongolicum, and enable Allium mongolicum to continuously perform some important physiological activities at night, such as material synthesis in the dark reaction stage, further enhance the photosynthesis efficiency, accelerate the growth and development of the plant, and thereby improve the yield and quality of Allium mongolicum. Exceeding this range will lead to too long light supplementing time, and Allium mongolicum may have a “light fatigue” phenomenon, which reduces the photosynthesis efficiency and affects the accumulation of photosynthetic products. It may also disrupt the normal physiological rhythm of Allium mongolicum, cause hormone imbalance, and thereby affect the growth of Allium mongolicum, such as abnormal leaf growth, poor root development, and the like, and also increase the energy consumption cost. If the light supplementing time is too short, the light supplementing time cannot meet the light duration demand of the growth of Allium mongolicum, the photosynthesis is limited, the plant grows slowly, the tillering decreases, and it is also difficult to improve the yield and quality.

[0025] The present application has the following technical effects:

[0026] 1. Promote growth: the present application uses red and blue combined LED light source with specific light intensity for light supplementing in a specific period, which can effectively promote the photosynthesis of Allium mongolicum, improve the photosynthesis efficiency, and accelerate the growth process.

[0027] 2. Improve yield and quality: the present application can increase the yield of Allium mongolicum and improve its quality by reasonable light supplementing, such as increasing the content of flavonoids and other nutritional ingredients and enhancing the nutritional value.

[0028] 3. Energy saving and high efficiency: the LED light source used in the application has the characteristics of low energy consumption and long service life, and the light supplementing method adopted by the application can reduce energy consumption and production cost.

[0029] 4. Precise regulation: the application can precisely regulate the spectrum according to the growth needs of Allium mongolicum by selecting LED light sources of specific wavelengths and combinations, thereby enhancing the light supplementing effect.

[0030] In summary, the application provides an efficient, energy-saving and precise light regulation scheme for facility Allium mongolicum cultivation by studying the application of LED light sources in facility Allium mongolicum cultivation, which has significant economic and social benefits and is expected to promote the development of facility Allium mongolicum cultivation industry. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 The effects of LED light supplementing with different light intensities on the yield and quality indicators of Allium mongolicum, wherein a is the effect on malondialdehyde content, b is the effect on stem diameter, c is the effect on yield, d is the effect on flavonoid content, and e is the effect on plant height. DETAILED DESCRIPTION

[0032] The various exemplary embodiments of the application will now be described in detail, which should not be considered as limiting the application, but should be understood as a more detailed description of certain aspects, characteristics and embodiments of the application.

[0033] It should be understood that the terms described in the application are only for describing the specific embodiments, and are not used to limit the application. In addition, for the numerical range in the application, it should be understood that each intermediate value between the upper limit and the lower limit of the range is also specifically disclosed. Each smaller range between any stated value or intermediate value within the range, and any other stated value or intermediate value within the range, is also included in the application. The upper limit and the lower limit of these smaller ranges can be independently included or excluded from the range.

[0034] Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the application pertains. Although preferred methods and materials are described, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present application. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials related to the documents. In the event of any conflict between the content of this specification and any incorporated document, the content of this specification shall prevail.

[0035] Many modifications and variations to the illustrative embodiments described herein will be apparent to those skilled in the art from consideration of the specification and practice of the subject application. Additional embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the subject application. The specification and examples given herein are exemplary only. It is to be understood that the specification and examples are illustrative of the subject application and are meant to provide example of structures and / or methods that fall within the scope of the subject application.

[0036] As used herein, the terms "comprise", "comprising", "include", "including", "have", "having" or the like are open-ended and allow for elements, components, etc., not expressly listed to be present.

[0037] The room temperature in the following examples and comparative examples of the present application is 25±5℃ unless otherwise specified.

[0038] The raw materials used in the following examples and comparative examples of the present application are commercially available products unless otherwise specified, and the source of the commercially available products has no effect on the technical effects of the present application.

[0039] The watering management in the following examples and comparative examples of the present application includes watering (watering thoroughly) after each mowing, watering every 10-15 days in summer (adjusting according to soil moisture) and watering every 15-20 days in winter (adjusting according to soil moisture) during the growth period after mowing the Allium mongolicum. The fertilizer management includes applying fertilizer after 1-2 mowings of Allium mongolicum, when the plants show signs of slow growth and yellowing leaves, and applying 8-12 kg of ammonium nitrate per mu.

[0040] The following example 1 and example 4 of the present application are actually the same example, and the treatment methods and final results of the two are the same. The purpose of setting two examples for the same technical solution here is to form a better comparison.

[0041] Examples 1-3 and comparative examples 1-2

[0042] In order to verify the effect of the output ratio of red light and blue light on the yield and quality of Allium mongolicum, examples 1-3 and comparative examples 1-2 are set up, as follows:

[0043] 1. Experimental materials:

[0044] Gansu Minqin Allium mongolicum was selected as the test material, and LED was used as the light source.

[0045] 2. Experimental method:

[0046] Six light treatments were designed: red light: blue light = 7:3 (Example 1, denoted as RB7:3), red light: blue light = 8:2 (Example 2, denoted as RB8:2), red light: blue light = 9:1 (Example 3, denoted as RB9:1), red light: blue light = 4:6 (Comparative Example 1, denoted as RB4:6), red light: blue light = 10:0 (Comparative Example 2, denoted as RB10:0), and no light supplement (CK) treatment. Each treatment was set up with 3 replicates, and each treatment area occupied 2m 2 , a total of 18 treatment areas. Each area was isolated using 2.5m x 2m black and white plastic film to ensure that the light between areas was independent of each other and to avoid interference from other light sources. The alliums were cultured at room temperature, and each treatment was subjected to natural light during the day and 5h of light supplement from 18:30 to 23:30 at night. The illuminance under different light conditions was measured using a plant lighting analyzer (PLA-30 Plant Lighting Analyzer), and the light intensity of each treatment was maintained at 100μmol·m -2 ·s -1 . The experiment started on the first day after the alliums were cut, and drip irrigation was used to supply water and fertilizer. The other management measures were consistent, and the alliums were harvested after 30 days, marking the end of the experiment.

[0047] 3. Growth index determination: After the end of the experiment, samples were taken, and 10 plants were randomly selected from each treatment. The alliums were cut at 1cm from the top of the stem, and the plant height and stem diameter were measured using a vernier caliper. The yield of the alliums was weighed using an electronic balance. The malondialdehyde (MDA) content of the alliums was determined using a Boxbio malondialdehyde content detection kit, and the flavonoids were determined using a spectrophotometric method.

[0048] 4. Data analysis: Data processing and analysis were completed using SPSS 26.0 software, and one-way ANOVA was performed using Duncan's multiple comparison method. Differences were considered significant at p<0.05 and extremely significant at p<0.01. Prism 10.0 and Microsoft Excel 2024 software were used to draw the corresponding tables.

[0049] The results are shown in Tables 1 and 2.

[0050] Table 1 Effect of the output ratio of red light and blue light on the plant height, stem diameter, and yield of alliums

[0051] Treatment Plant height (cm) Stem diameter (mm) Yield (kg / m 2 ) CK 240.4 c ]]> 1.85 b ]]> 0.66 b ]] RB9:1 307.6 a ]] 2.04 a ]] 0.97 a ]] RB8:2 297.2 b ]] 2.05 a ]]> 0.98 a ]] RB7:3 294.9 b ]] 2.09 a ]]> 1.02 a ]] RB4:6 260 d ]] 1.95 b ]]> 0.75 c ]] RB10:0 285.3 c ]]> 1.92 c ]]> 0.82 b ]]

[0052] Table 2 Effect of the output ratio of red light and blue light on the flavonoid and malondialdehyde content of alliums

[0053] Treatment Flavonoids (mg / g) Malondialdehyde (mg / g) CK 4.004 b ]]> 19.716 a ]]> RB9:1 6.467 a ]]> 16.247 c ]]> RB8:2 6.629 a ]]> 16.425 bc ]]> RB7:3 6.926 a ]]> 17.476 b ]]> RB4:6 4.856 c ]]> 18.204 b ]]> RB10:0 5.203 b ]]> 18.912 b ]]>

[0054] As can be seen from Table 1, in terms of the plant height of Allium hookeri, the plant height of CK is the lowest, and compared with the control group CK, the plant height of RB9:1, RB8:2 and RB7:3 light supplement treatment is increased by 27.95%, 23.63% and 22.66% respectively. This shows that the light supplement treatment has a significant promoting effect on the growth of Allium hookeri. Among them, the plant height of RB9:1 treatment reaches the highest value, which is significantly different from the control group CK, and the increase amplitude is 27.95%; compared with RB8:2 and RB7:3 treatment, the increase amplitude is 3.49% and 4.30% respectively; specifically, the plant height of RB8:2 treatment is increased by 23.63% compared with the control group CK, which is close to the plant height value of RB7:3 treatment, and there is no significant difference between the two (P>0.05), but the plant height of the three treatments of examples 1-3 is significantly increased compared with the control group CK (P<0.05). And compared with the treatments of comparative examples 1-2, the plant height of the three treatments of examples 1-3 is also significantly increased.

[0055] In terms of the stem diameter of Allium hookeri, compared with the control group CK (stem diameter is 1.85 mm), the stem diameter of Allium hookeri treated by RB9:1, RB8:2 and RB7:3 light supplement is increased to 2.04 mm, 2.05 mm and 2.09 mm respectively, which are all significantly increased. Among them, the stem diameter of Allium hookeri treated by RB7:3 is significantly higher than that of the control group CK, which is 1.13 times of the control group; compared with the control group, the stem diameter of Allium hookeri treated by RB9:1 and RB8:2 is increased by 10.27% and 10.81% respectively, and the stem diameter values of Allium hookeri treated by RB9:1, RB8:2 and RB7:3 are similar, and there is no significant difference among them (P>0.05). And compared with the treatments of comparative examples 1-2, the stem diameter of the three treatments of examples 1-3 is also significantly increased.

[0056] In terms of yield, after light supplement treatment, the yield of Allium hookeri treated by RB9:1, RB8:2 and RB7:3 is increased by 46.97%, 48.48% and 54.55% respectively compared with CK. The yield of the three light supplement treatments (RB9:1, RB8:2 and RB7:3) is significantly higher than that of the control group CK (P<0.05), among which the yield of RB7:3 treatment is significantly higher than that of other treatment methods, but the yield difference between RB9:1 and RB8:2 treatment is not significant (P>0.05). And compared with the treatments of comparative examples 1-2, the yield of the three treatments of examples 1-3 is also significantly increased.

[0057] As can be seen from the above, the light supplement treatment under the specific ratio of red light and blue light has a significant effect on the stem diameter and yield of Allium hookeri, especially the RB7:3 light supplement treatment has the most prominent effect in improving the yield, which provides an important light supplement strategy reference for the high-yield cultivation of Allium hookeri.

[0058] From Table 2, in terms of flavonoid content, after light supplement treatment, the flavonoid content of Allium hookeri RB9:1, RB8:2 and RB7:3 treatment was increased by 61.51%, 65.56% and 72.98% respectively compared with the control group CK. The flavonoid content of the three light supplement treatments (RB9:1, RB8:2 and RB7:3) was significantly higher than that of the control group CK (P<0.05), among which the flavonoid content of RB7:3 treatment was significantly higher than that of other treatment methods, but the difference in flavonoid content between RB9:1 and RB8:2 treatment was not significant (P>0.05). And compared with the treatments of Comparative Examples 1-2, the flavonoid content of the three treatments of Examples 1-3 was also significantly increased.

[0059] In terms of malondialdehyde content, after light supplement treatment, the malondialdehyde content of Allium hookeri RB9:1, RB8:2 and RB7:3 treatment was reduced by 17.60%, 16.79% and 11.36% respectively compared with the control group CK. The malondialdehyde content of the three light supplement treatments (RB9:1, RB8:2 and RB7:3) was significantly lower than that of the control group CK (P<0.05), however, the difference in malondialdehyde content between RB9:1, RB8:2 and RB7:3 was not significant (P>0.05). And compared with the treatments of Comparative Examples 1-2, the malondialdehyde content of the three treatments of Examples 1-3 was also reduced.

[0060] Examples 4-6

[0061] In order to verify the influence of light intensity on the yield and quality of Allium hookeri, Examples 4-6 and Comparative Examples 3-4 were set up, as follows:

[0062] 1. Experimental materials:

[0063] Gansu Minqin Allium hookeri was selected as the test material, and LED was used as the light source.

[0064] 2. Experimental method:

[0065] Five different light intensity treatments were designed: 100 μmol·m -2 ·s -1 (Example 4, denoted as T1), 200 μmol·m -2 ·s -1 (Example 5, denoted as T2) and 300 μmol·m -2 ·s -1 (Example 6, denoted as T3). The output ratio of red light and blue light was 7:3 for each treatment. Each treatment was set up in triplicate, and each treatment area occupied an area of 2 m 2, a total of 15 treatment zones. Each area is isolated using 2.5 m x 2 m black and white plastic film, ensuring that the light between areas is independent of each other, avoiding the interference of other light sources. Allium hookerii is cultured at room temperature, and each treatment is subjected to natural light during the day and 5h of supplemental light from 18:30 to 23:30 at night. The illuminance under different light conditions was measured using a plant lighting analyzer (PLA-30 Plant Lighting Analyzer). The experiment began on the first day after the Allium hookerii was cut, and drip irrigation was used to supply water and fertilizer. Other management measures were consistent, and the Allium hookerii was harvested after 30 days, marking the end of the experiment.

[0066] 3. Growth index determination: After the end of the experiment, samples were taken, and 10 plants were randomly selected from each treatment. The plants were cut at 1 cm from the top of the stem, and the plant height and stem diameter were measured using a vernier caliper. The yield of Allium hookerii was weighed using an electronic balance. The malondialdehyde (MDA) content of Allium hookerii was determined using a Boxbio MDA content detection kit, and the flavonoids were determined using a spectrophotometer.

[0067] 4. Data analysis: Data processing and analysis were completed using SPSS 26.0 software, and one-way ANOVA was performed using Duncan's multiple comparison method. Differences were considered significant at p<0.05 and extremely significant at p<0.01. Prism 10.0 and Microsoft Excel 2024 software were used to generate the corresponding graphs.

[0068] The results are shown in Figure 1 .

[0069] Figure 1 The effects of different light intensities of LED supplemental light on the yield and quality indicators of Allium hookerii, where a is the effect on malondialdehyde content, b is the effect on stem diameter, c is the effect on yield, d is the effect on flavonoid content, and e is the effect on plant height. As shown in Figure 1 , in terms of plant height, the highest plant height was observed in the T3 treatment, followed by T2 and T1. There was a significant difference between T1 and the other two groups, but no significant difference between T2 and T3.

[0070] In terms of stem diameter, the largest stem diameter was observed in the T2 treatment, followed by T3 and T1, but there was no significant difference between the three groups. In terms of yield, the highest yield was observed in the T2 treatment, which was 15.64% and 34.13% higher than T1 and T3, respectively, and significantly higher than the other two treatments.

[0071] In terms of flavonoid content, the highest flavonoid content was observed in the T3 treatment, followed by T2 and T1, and there were significant differences between the groups.

[0072] In terms of malondialdehyde content, the highest was T3, followed by T1 and T2, and there were significant differences between groups.

[0073] It can be seen that different light intensities have significant effects on the growth, quality and yield of Allium pratense, and T2 treatment is the best in terms of growth and development, which is the preferred light intensity for cultivating Allium pratense.

[0074] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be mutually referred to.

[0075] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for cultivating allium mongolicum using LED as a light source, characterized in that: The steps include: After the allium mongolicum is cut, the allium mongolicum is supplemented with light every day until the allium mongolicum is harvested again; then the allium mongolicum is cut, and the above steps are repeated; The supplementary light treatment includes: providing natural light during the day, and supplementary light using LED as a light source for 5 hours at night when there is no natural light; The output ratio of red light to blue light during the fill light process is 6:4~9:1; The light intensity of the supplementary light is 100-300 μmol·m -2 ·s -1 .

2. The method for cultivating allium mongolicum using LED as a supplementary light source according to claim 1, characterized in that: The time for the fill light is 6:30pm~11:30pm.

3. The method for cultivating allium mongolicum using LED as a supplementary light source according to claim 1, characterized in that: The method for cultivating allium mongolicum using LED as a supplementary light source also includes water and fertilizer management of the allium mongolicum.

4. The method for cultivating allium mongolicum using LED as a light source according to claim 3, characterized in that: The water and fertilizer management includes watering management and fertilizer management; the watering management includes: watering after each mowing, during the growth period after mowing the mongolica, watering every 10 to 15 days in summer and every 15 to 20 days in winter; the fertilizer management includes: after mowing the mongolica 1 to 2 times, if the growth is slow and the leaves turn yellow due to lack of fertilizer and water, topdressing should be carried out, and 8 to 12 kg of ammonium nitrate should be applied per mu.

5. A method for improving the yield and quality of Allium mongolicum, characterized in that: The method comprises the following steps: cultivating allium mongolicum by adopting the method for cultivating allium mongolicum using LED as a supplementary light source as described in any one of claims 1 to 4.

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