A growth promoter for improving cotton emergence rate in saline-alkali soil and application thereof

Abstract

The application discloses a growth promoter for improving the seedling emergence rate of cotton in saline-alkali soil, and the salt resistance of cotton seed germination is improved by using rapeseed euricin regulator and GABA permeation regulator; the stable agent formed by strong acid materials such as urea phosphate can quickly reduce the pH value and saline-alkali of the soil tillage layer; meanwhile, the urea phosphate, amino acid, fulvic acid and auxiliary materials provide certain nutrient substances for seedling crops; the cooperation among raw materials fundamentally improves the salt tolerance of cotton seedling, not only improves the seedling emergence rate of cotton, but also can quickly reduce the pH value of saline-alkali soil in Xinjiang after dissolving water, improves the chemical composition of soil, reduces the salt content and alkalinity of soil, creates a good environment for crop growth, and after application, the soil salt content is below 20 g / kg, the pH value is below 7.5, the seedling emergence rate of cotton is above 70%, which is more than 30% higher than that of the control, and the yield of cotton in saline-alkali soil in Xinjiang is significantly increased, thereby providing technical support for rural revitalization.

Description

Technical Field

[0001] This invention belongs to the field of cotton growth promotion technology in saline-alkali land, specifically relating to a growth promoter that improves the emergence rate of cotton in saline-alkali land and its application. Technical Background

[0002] Xinjiang is internationally known as the "World Museum of Saline-Alkali Land." According to a 2014 survey by the Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, saline-alkali land accounts for 37.72% of the irrigated farmland in Xinjiang, and 49.6% in southern Xinjiang. Faced with seasonal water shortages and the inability to guarantee winter and spring irrigation, the "dry-sowing, wet-emergence" technique emerged. This technique, also known as subsurface drip irrigation for soil moisture retention and salt drainage, involves skipping winter or spring irrigation in cotton fields before sowing. After land preparation, mulch film and drip irrigation tape are laid, followed by cotton sowing. Once the suitable emergence temperature is reached, small amounts of water are dripped under the film to ensure sufficient soil moisture for cotton seed emergence, thus guaranteeing successful seedling emergence. For saline cotton fields in southern Xinjiang, the irrigation volume of the dry-seeding and wet-emergence technique is less than that of traditional winter or spring irrigation. The intense soil evaporation makes salt return (salt accumulation) more likely, leading to cotton seedling failure and death, thus limiting the large-scale application of this technique. With the reduction of water quotas, more cotton fields will be unable to undergo winter or spring irrigation to wash away and suppress salt, making the "dry-seeding and wet-emergence" technique an inevitable choice. Therefore, it is urgent to understand the salt return mechanism of cotton seedlings in saline-alkali land, as well as the control mechanisms of dry-seeding and wet-emergence and seedling protection and promotion, and to propose relevant management models for soil salt accumulation. Currently, growth promoters have a relatively singular function, mainly providing nutrients, without fully considering the crop's sensitivity to salt. Crops suffering from salt damage during germination have limited growth and cannot fully absorb nutrients. Therefore, there is an urgent need for a growth promoter that not only provides nutrients but also regulates substances to stimulate the plant itself, producing stress-resistant substances and enhancing its salt tolerance, thus solving the problem of high soil pH affecting seedling emergence during the germination period. Summary of the Invention

[0003] In response to the serious problem of cotton seedling failure and death caused by "dry sowing and wet germination," there is an urgent need to fundamentally improve crop stress resistance and improve the soil topsoil environment. This invention aims to provide a growth promoter for improving cotton seedling emergence rate in saline-alkali land and its application. This invention focuses on improving cotton seedling emergence by enhancing crop stress resistance and improving the soil topsoil environment. It improves the salt tolerance of cotton seeds during germination by using rapeseed lactone regulators and GABA osmotic regulators. It also rapidly reduces soil pH and salinity by using strong acidic materials such as urea phosphate, fulvic acid, and amino acids to stabilize the seedlings and promote seed emergence. The surrounding soil creates a low-salt, low-alkali environment conducive to cotton seedling emergence. Simultaneously, urea phosphate, amino acids, fulvic acid, and auxiliary materials provide certain nutrients for the seedlings. The synergistic effect of these raw materials fundamentally improves the salt tolerance of cotton seedlings, significantly increasing the emergence rate. After dissolving in water, it rapidly lowers the pH of saline-alkali soils in Xinjiang, improves soil chemical composition, and creates a favorable environment for crop growth. After application, soil salinity drops below 20 g / kg, and pH value drops below 7.5. Meanwhile, the cotton emergence rate can reach over 70%, an increase of over 30% compared to the control, significantly increasing cotton yield in saline-alkali lands of Xinjiang and providing technical support for rural revitalization.

[0004] To achieve the above effects, the present invention adopts the following technical solution:

[0005] This invention provides a growth promoter for improving the emergence rate of cotton in saline-alkali land. By weight, the growth promoter includes 3-5 parts of γ-aminobutyric acid, 1-3 parts of rapeseed lactone, 1800-2000 parts of urea phosphate, 4000-4500 parts of biochemical potassium humate, 1000-1500 parts of compound amino acids, 200-300 parts of zinc sulfate, and 100-150 parts of boron fertilizer.

[0006] Furthermore, the growth promoter for improving the emergence rate of cotton in saline-alkali land provided by the present invention comprises, by weight, 4 parts of γ-aminobutyric acid, 2 parts of rapeseed lactone, 1900 parts of urea phosphate, 4300 parts of biochemical potassium humate, 1300 parts of compound amino acids, 250 parts of zinc sulfate, and 150 parts of boron fertilizer.

[0007] The present invention provides a growth promoter for improving the emergence rate of cotton in saline-alkali land. The compound amino acid comprises 18 amino acids, including glycine, alanine, leucine, isoleucine, valine, cystine, cysteine, methionine, threonine, serine, phenylalanine, tyrosine, tryptophan, proline, hydroxyproline, glutamic acid, and aspartic acid, with a pH of 5.6. The compound amino acid has a certain binding capacity, effectively protecting other components from loss and enhancing the shaping of granular materials. The compound amino acid, in conjunction with urea phosphate, regulates soil pH, improves seed stress resistance, and enhances nitrogen nutrition.

[0008] The present invention provides a growth promoter for improving the emergence rate of cotton in saline-alkali land. The boron fertilizer is a commercially available boron fertilizer (boric acid and borax), which can promote the differentiation of cotton seed flower buds, promote root growth, and improve stress resistance.

[0009] This invention also provides an application of a growth promoter that improves the emergence rate of cotton in saline-alkali land.

[0010] In the application of the growth promoter for improving the emergence rate of cotton in saline-alkali land provided by this invention, the growth promoter for cotton planting in saline-alkali land is applied at a rate of 1-2 kg per mu, with a drip irrigation volume of 20 cubic meters per mu. Before application, drip water for half an hour or 10 cubic meters per mu, then put the growth promoter into the fertilizer tank and completely dissolve it before dripping it with the water until the irrigation is finished.

[0011] Through the above technical solutions, the present invention achieves the following technical effects:

[0012] This invention improves the salt tolerance of cotton seeds during germination by using rapeseed lactone regulators and GABA osmotic regulators. It rapidly reduces soil pH and salinity by using strong acidic materials such as urea phosphate, fulvic acid, and amino acids to form a stabilizer, creating a low-salt, low-alkali environment around the cotton seeds that promotes seedling emergence. Simultaneously, urea phosphate, amino acids, fulvic acid, and other additives provide nutrients to the seedlings, resulting in synergistic effects among the materials. This fundamentally improves the salt tolerance of cotton seedlings, significantly increasing the emergence rate. After dissolving in water, it rapidly lowers the pH of saline-alkali soils in Xinjiang, improving soil chemical composition and reducing soil salinity and alkalinity, creating a favorable environment for crop growth. After application, soil salinity drops to below 20 g / kg, and pH to below 7.5, while the cotton emergence rate reaches over 70%, an increase of over 30% compared to the control, significantly increasing cotton yield in Xinjiang's saline-alkali land and providing technical support for rural revitalization. Attached Figure Description

[0013] none Detailed Implementation

[0014] The present invention is illustrated by the following embodiments; however, the present invention is not limited to the following embodiments.

[0015] The raw materials used in this invention, such as γ-aminobutyric acid, brassinolide, urea phosphate, and potassium humate, can all be purchased through public channels. The equipment and instruments used in the process are all commonly used in the field. The determination methods for all materials, reagents, and instruments selected in this invention are well-known in the field but do not limit the embodiments of this invention. Other well-known reagent kits and equipment can be applied to the embodiments of the following embodiments of this invention.

[0016] Example 1: Growth promoters to improve cotton emergence rate in saline-alkali land

[0017] This embodiment provides a growth promoter for improving the emergence rate of cotton in saline-alkali land. By weight, the growth promoter includes 3-5 parts of γ-aminobutyric acid, 1-3 parts of rapeseed lactone, 1800-2000 parts of urea phosphate, 4000-4500 parts of biochemical potassium humate, 1000-1500 parts of compound amino acids, 200-300 parts of zinc sulfate, and 100-150 parts of boron fertilizer.

[0018] Example 2: Growth promoters to improve cotton emergence rate in saline-alkali land

[0019] Based on Example 1, this embodiment provides a growth promoter to improve the emergence rate of cotton in saline-alkali land. By weight, the growth promoter includes 4g of γ-aminobutyric acid, 2g of rapeseed lactone, 1900g of urea phosphate, 4300g of biochemical potassium humate, 1300g of compound amino acids, 250g of zinc sulfate, and 150g of boron fertilizer.

[0020] Example 3: Growth promoters to improve cotton emergence rate in saline-alkali land

[0021] Based on Example 1, this embodiment provides a growth promoter to improve the emergence rate of cotton in saline-alkali land. By weight, the growth promoter includes 3g of γ-aminobutyric acid, 1g of rapeseed lactone, 1800g of urea phosphate, 4000g of biochemical potassium humate, 1000g of compound amino acids, 200g of zinc sulfate, and 100g of boron fertilizer.

[0022] Example 4: Growth promoters to improve cotton emergence rate in saline-alkali land

[0023] Based on Example 1, this embodiment provides a growth promoter to improve the emergence rate of cotton in saline-alkali land. By weight, the growth promoter includes 5g of γ-aminobutyric acid, 3g of rapeseed lactone, 2000g of urea phosphate, 4500g of biochemical potassium humate, 1500g of compound amino acids, 300g of zinc sulfate, and 150g of boron fertilizer.

[0024] Example 5: Growth promoters to improve cotton emergence rate in saline-alkali land

[0025] Based on Example 1, this embodiment provides a growth promoter to improve the emergence rate of cotton in saline-alkali land. By weight, the growth promoter includes 4g of γ-aminobutyric acid, 2g of rapeseed lactone, 1950g of urea phosphate, 4400g of biochemical potassium humate, 1400g of compound amino acids, 260g of zinc sulfate, and 140g of boron fertilizer.

[0026] Example 6: Application of growth promoters to improve cotton emergence rate in saline-alkali land

[0027] This embodiment applies the growth promoter provided by the present invention based on embodiments 1-5. The dosage is 1-2 kg per mu, with a drip irrigation volume of 20 cubic meters per mu. Before application, drip water for half an hour or 10 cubic meters per mu, then put the growth promoter into the fertilizer tank and completely dissolve it before dripping it with the water until the irrigation is finished.

[0028] Indoor comparative experiments were conducted in an artificial climate laboratory. The cotton variety was Xinluzhong 84. The salt stress was 120 mmol / L and 150 mmol / L NaCl solution. Germination tests were carried out in 8 cm diameter petri dishes. 1 L of 10% growth promoter aqueous solution was prepared using the growth promoter from Example 2 of this invention, with dosages of 4 mL and 8 mL respectively. The control was soaking seeds in water. Two layers of filter paper were placed in the petri dish, and then cotton seeds were placed in the petri dish, with 30 seeds in each dish. Then 8 mL of NaCl solution was added to each dish, followed by the growth promoter solution. The control did not receive any additions. The germination rate of cotton seeds under different salt concentrations was investigated daily. The experiment ended after 10 days. The specific experimental results are shown in Table 1.

[0029] Table 1: Emergence rate of cotton seedlings treated with growth promoters

[0030]

[0031] As shown in Table 1, under NaCl stress at a concentration of 120 mmol / L, the average emergence rate of cotton seeds was 64.5%. Treatment with 4 mL of a growth promoter solution increased the average emergence rate to 82.3%, and treatment with 8 mL of the growth promoter solution increased the average emergence rate to 86.6%. Under NaCl salinity stress at a concentration of 150 mmol / L, the average emergence rate of cotton seeds was 51.3%. Treatment with 4 mL of a growth promoter solution increased the average emergence rate to 72.3%, and treatment with 8 mL of the growth promoter solution increased the average emergence rate to 80.3%. This indicates that the growth promoter provided by this invention can significantly improve the emergence rate of cotton under salt stress.

[0032] Field trials

[0033] A field comparison experiment was conducted in Team 4 of Seke Township, Yuepuhu County. The soil salinity (0-30cm) was 16.4g / kg, the soil pH was 8.45, and the soil texture was clay loam. Cotton was planted using a single-film, 6-row, 3-pipe planting method with a 66+10cm spacing and a plant spacing of 10.5cm. Sowing and seedling emergence were carried out using a dry-sowing and wet-emergence method. Sowing was carried out on April 15th, with the variety being Xinluzhong 68. Drip irrigation was carried out two days after sowing at a rate of 25 cubic meters per mu. In the last half hour after irrigation, 2kg of the growth promoter prepared in Example 2 of this invention was dripped. A control group was set up without drip irrigation. The growth promoters in Examples 3-5 of this invention were also tested. A seedling emergence survey was conducted on April 30th. Each group underwent three parallel experiments. The specific results are shown in Table 2.

[0034] Table 2: Survey on the Emergence Rate of Cotton Growth Promoters

[0035] Emergence rate % pH Salt content (g / kg) Comparison 37.7％ 8.1 22.4 This invention 74.2％ 7.2 16.1 Example 3 63.6％ 7.5 17.6 Example 4 68.2％ 7.4 16.8 Example 5 71.2％ 7.3 16.3

[0036] As shown in Table 2, the cotton emergence rate in the control group was only 37.7%, while the emergence rate of cotton treated with the growth promoter provided by this invention was 68.6%, significantly improving the emergence rate of cotton in saline-alkali land. Furthermore, after drip application of the growth promoter, the soil pH was measured to be 7.5, effectively reducing the soil pH.

[0037] In summary, the data shows that this invention improves the salt tolerance of cotton seeds during germination by using rapeseed lactone regulators and GABA osmotic regulators. Strongly acidic materials such as urea phosphate, fulvic acid, and amino acids act as stabilizers, rapidly reducing the pH and salinity of the topsoil, creating a low-salt, low-alkali environment around the cotton seeds that promotes seedling emergence. Simultaneously, urea phosphate, amino acids, fulvic acid, and adjuvants provide certain nutrients for the seedlings. The synergistic effect among these materials fundamentally improves the salt tolerance of cotton seedlings, significantly increasing the emergence rate. The growth promoter of this invention, when dissolved in water, rapidly reduces the pH of saline-alkali soils in Xinjiang, improving soil chemical composition and lowering soil salinity and alkalinity, creating a favorable environment for crop growth. After application, soil salinity drops to below 20 g / kg, and pH to below 7.5. Simultaneously, the cotton emergence rate reaches over 70%, an increase of over 30% compared to the control, significantly increasing cotton yield in saline-alkali lands of Xinjiang and providing technical support for rural revitalization.

[0038] The above embodiments are merely examples to clearly illustrate the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A growth promoter for improving the emergence rate of cotton in saline-alkali land, characterized in that, By weight, the growth promoter comprises 4 parts γ-aminobutyric acid, 2 parts rapeseed lactone, 1900 parts urea phosphate, 4300 parts biochemical potassium humate, 1300 parts compound amino acids, 250 parts zinc sulfate, and 150 parts boron fertilizer; the pH of the compound amino acids is 5.6; the boron fertilizer is either boric acid or borax; the compound amino acids include glycine, alanine, leucine, isoleucine, valine, cystine, cysteine, methionine, threonine, serine, phenylalanine, tyrosine, tryptophan, proline, hydroxyproline, glutamic acid, and aspartic acid.

2. The application of the growth promoter for improving the emergence rate of cotton in saline-alkali land as described in claim 1 in cotton cultivation in saline-alkali land, characterized in that, The growth promoter is used at a rate of 1-2 kg per mu (approximately 0.067 hectares). The drip irrigation water volume is 20 cubic meters per mu. Before application, drip water for half an hour or 10 cubic meters per mu, then put the growth promoter into the fertilizer tank and dissolve it completely before dripping it with the water until the irrigation is finished.

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