Organic microbial fertilizer for white gourd cultivation in saline-alkali soil and preparation method thereof

Abstract

The invention discloses an organic microbial fertilizer for white gourd cultivation in saline-alkali soil and a preparation method thereof. The organic microbial fertilizer is prepared from the following substances in parts by weight: 20 to 50 parts of fermented and decomposed dried vegetable waste, 50 to 100 parts of fermented and decomposed chicken feather, 10 to 20 parts of fermented and decomposed waste fruit, 20 to 50 parts of decomposed corn bran, 10 to 20 parts of decomposed rice husk and 20 parts of fermented and decomposed chicken manure. The fertilizer is prepared from, by weight, 10 parts of charcoal residues, 20-25 parts of pond soil, 30-40 parts of wax gourd waste microbial organic fertilizer, 1-3 parts of humic acid, 1-5 parts of monopotassium phosphate, 1 part of carbendazim, 1-5 parts of rooting powder and 1 part of polyacrylamide.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of agricultural waste utilization and saline-alkali land cultivation, and particularly relates to an organic microbial fertilizer for cultivating wax gourd in saline-alkali land and a preparation method thereof. BACKGROUND

[0002] It is necessary to make comprehensive reconstruction and utilization of saline-alkali land, develop characteristic agriculture in saline-alkali land, and strengthen research and development and popularization of crop varieties suitable for saline-alkali land by means of biotechnology and scientific and technological innovation.

[0003] Wax gourd is an annual climbing herb of Cucurbitaceae genus, and the planting area in China reaches 6 million mu, the annual yield reaches 58 million tons, the output value of fresh wax gourd and processed products exceeds 70 billion yuan, and the market development prospect is broad.

[0004] At present, conventional planting is still adopted for wax gourd, that is, ridges are formed on the ground, or wax gourd is planted on the ridges covered with film. Wax gourd is usually continuously planted in the same land for several years in a greenhouse, which leads to serious breeding of soil bacteria and salinization, and formation of continuous cropping obstacles. SUMMARY

[0005] The present application aims to provide an organic microbial fertilizer for cultivating wax gourd in saline-alkali land and a preparation method thereof.

[0006] The technical solution adopted by the present application to solve the technical problem is as follows:

[0007] An organic microbial fertilizer for cultivating wax gourd in saline-alkali land is prepared from the following components in parts by weight: 20-50 parts of fermented and decomposed dry vegetable waste, 50-100 parts of fermented and decomposed chicken feather, 10-20 parts of fermented and decomposed waste fruit, 20-50 parts of decomposed corn husk, 10-20 parts of decomposed rice husk, 20 parts of fermented and decomposed chicken manure, 10 parts of charcoal residue, 20-25 parts of pond mud, 30-40 parts of wax gourd waste microbial organic fertilizer, 1-3 parts of humic acid, 1-5 parts of potassium dihydrogen phosphate, 1 part of carbendazim, 1-5 parts of rooting powder, and 1 part of polyacrylamide.

[0008] Preferably, the fermented and decomposed waste fruit is obtained by naturally fermenting decomposed longan and / or waste litchi in a reaction tank.

[0009] Preferably, the fermented and decomposed dry vegetable waste is obtained by crushing the branches, vines, leaves, and gourds and vegetables without commercial value discarded after picking in the process of vegetable planting into powder when the water loss is 60-70%, uniformly stirring the powder with microbial strains, and then loading the mixture into a reaction tank for fermentation.

[0010] Preferably, the fermented and decomposed chicken feather is obtained by drying and decomposing the waste chicken feather from poultry slaughterhouse to 80%, crushing the decomposed feather with a crusher, uniformly stirring the crushed feather with microbial strains, and then loading the mixture into a reaction tank for fermentation.

[0011] Preferably, the fermented and decomposed chicken manure is prepared by adding chicken manure into a reaction tank with 5% urea and microbial strains, and then fermenting in the reaction tank.

[0012] Preferably, the decomposed corn husk is prepared by drying and sunning green corn husk and / or corn cobs to 70% water loss, crushing by a crusher, adding microbial strains, stirring uniformly, and then fermenting in a reaction tank.

[0013] The embodiment of the present application also provides a preparation method of the organic microbial fertilizer for winter melon cultivation in saline-alkali soil.

[0014] The fermented and decomposed dried vegetable waste, the fermented and decomposed chicken feather, the fermented and decomposed waste fruit, the decomposed corn husk, the decomposed rice husk, the fermented and decomposed chicken manure, charcoal residue, pond mud, and the winter melon waste microbial organic fertilizer are mixed and stirred uniformly, then humic acid, potassium dihydrogen phosphate, carbendazim, rooting powder, and polyacrylamide are added according to the formula, and fully mixed, 50% carbendazim is added, and a 1:800-1000 dilution is prepared for sterilization, 1% fermenting bacteria and 20% water are added for re-fermentation, and the first organic microbial fertilizer for winter melon cultivation in saline-alkali soil is obtained when the weight per unit volume no longer decreases.

[0015] The second organic microbial fertilizer for winter melon cultivation in saline-alkali soil is prepared from the first organic microbial fertilizer for winter melon cultivation in saline-alkali soil and the winter melon waste microbial organic fertilizer.

[0016] The third organic microbial fertilizer for winter melon cultivation in saline-alkali soil is prepared from the first organic microbial fertilizer for winter melon cultivation in saline-alkali soil.

[0017] The fourth organic microbial fertilizer for winter melon cultivation in saline-alkali soil is prepared from the second organic microbial fertilizer for winter melon cultivation in saline-alkali soil.

[0018] The fifth organic microbial fertilizer for winter melon cultivation in saline-alkali soil is prepared from the first organic microbial fertilizer for winter melon cultivation in saline-alkali soil and the second organic microbial fertilizer for winter melon cultivation in saline-alkali soil.

[0019] The first organic microbial fertilizer for winter melon cultivation in saline-alkali soil, the second organic microbial fertilizer for winter melon cultivation in saline-alkali soil, the third organic microbial fertilizer for winter melon cultivation in saline-alkali soil, the fourth organic microbial fertilizer for winter melon cultivation in saline-alkali soil, and the fifth organic microbial fertilizer for winter melon cultivation in saline-alkali soil are mixed at a ratio of 1:1:1:1:1, and then fully mixed with 1-3% acetic acid to obtain the final organic microbial fertilizer for winter melon cultivation in saline-alkali soil.

[0020] Preferably, the process of preparing the second organic microbial fertilizer for winter melon cultivation in saline-alkali land by using the first organic microbial fertilizer for winter melon cultivation in saline-alkali land and the microbial organic fertilizer for winter melon waste specifically includes: mixing the first organic microbial fertilizer for winter melon cultivation in saline-alkali land and the microbial organic fertilizer for winter melon waste in a volume ratio of 2:1 and stirring evenly to obtain the second organic microbial fertilizer for winter melon cultivation in saline-alkali land.

[0021] Preferably, the process of preparing the third organic microbial fertilizer for winter melon cultivation in saline-alkali land from the first organic microbial fertilizer for winter melon cultivation specifically includes: dissolving urea, potassium dihydrogen phosphate and potassium sulfate, adding them to the first organic microbial fertilizer for winter melon cultivation in saline-alkali land, mixing them evenly, and obtaining the third organic microbial fertilizer for winter melon cultivation in saline-alkali land.

[0022] The process of preparing the fourth saline-alkali land winter melon organic microbial fertilizer from the second saline-alkali land winter melon cultivation organic microbial fertilizer specifically includes: dissolving urea, potassium dihydrogen phosphate and potassium sulfate, then adding them to the second saline-alkali land winter melon cultivation organic microbial fertilizer, mixing them evenly, and obtaining the fourth saline-alkali land winter melon cultivation organic microbial fertilizer.

[0023] The amount of urea added is 1-3% of the target fertilizer mass, the amount of potassium dihydrogen phosphate added is 1-5% of the target fertilizer mass, and the amount of potassium sulfate added is 0.3% of the target fertilizer mass dissolved in water.

[0024] Preferably, the step of preparing the fifth organic microbial fertilizer for winter melon cultivation in saline-alkali land using the first organic microbial fertilizer for winter melon cultivation in saline-alkali land and the second organic microbial fertilizer for winter melon cultivation in saline-alkali land specifically includes: mixing the first organic microbial fertilizer for winter melon cultivation in saline-alkali land and the second organic microbial fertilizer for winter melon cultivation in saline-alkali land at a mass ratio of 1:1 to obtain the fifth organic microbial fertilizer for winter melon cultivation in saline-alkali land.

[0025] Compared with existing technologies, the organic microbial fertilizer for winter melon cultivation in saline-alkali land prepared by this invention can meet the needs of winter melon (hair gourd) cultivation in saline-alkali land of varying degrees and moderate to low saline-alkali land throughout the entire growth period of the plant. It makes the leaves greener, increases the leaf area, and develops the root system more well. The plant grows vigorously and produces more fruits, thus improving the yield and quality of winter melon (hair gourd). The formula of this organic microbial fertilizer for winter melon cultivation in saline-alkali land has low production cost, simple preparation method, abundant raw materials, and is easy to implement, making it suitable for large-scale facility cultivation. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0027] This invention provides an organic microbial fertilizer for winter melon cultivation in saline-alkali land, composed of the following substances in parts by weight: 20-50 parts fermented and decomposed dried vegetable waste, 50-100 parts fermented and decomposed chicken feathers, 10-20 parts fermented and decomposed waste fruit, 20-50 parts decomposed corn husks, 10-20 parts decomposed rice husks, 20 parts fermented and decomposed chicken manure, 10 parts charcoal residue, 20-25 parts pond mud, 30-40 parts winter melon waste microbial organic fertilizer, 1-3 parts humic acid, 1-5 parts potassium dihydrogen phosphate, 1 part carbendazim, 1-5 parts rooting powder, and 1 part polyacrylamide.

[0028] The organic microbial fertilizer for winter melon cultivation in saline-alkali land prepared by this invention can meet the growth requirements of winter melon (hair gourd) in saline-alkali land of varying degrees and moderate to low salinity throughout its entire growth period. It results in greener leaves, increased leaf area, and more developed root system, leading to vigorous growth, more fruit production, and improved yield and quality of winter melon (hair gourd). This organic microbial fertilizer formula for winter melon cultivation in saline-alkali land has low production cost, simple preparation method, abundant raw materials, and is easy to implement, making it suitable for large-scale facility cultivation.

[0029] This invention uses a variety of waste materials to co-ferment to construct a loose matrix, increasing the porosity by more than 40%, thus solving the problem of soil compaction in saline-alkali soil. Microbial metabolism produces extracellular polysaccharides (EPS), which encapsulate salt ions to form a biofilm, reducing root contact (electron microscopy shows an 80% reduction in salt crystallization on the root surface).

[0030] In this invention, charcoal residue adsorbs Na + Cl- ions and polyacrylamide form a water-retaining film, reducing the surface aggregation effect of salt as it evaporates with water; humic acid chelates sodium ions and neutralizes alkalinity (pH decreases by 0.8-1.2), reducing soil electrical conductivity by more than 40%. Winter melon waste microbial organic fertilizer contains salt-tolerant bacteria that secrete organic acids to dissolve fixed salts and improve nutrient availability.

[0031] Fermented chicken feathers slowly release 18 kinds of amino acids, avoiding ammonia volatilization loss in saline-alkali soil; chicken manure provides organic NPK (N 1.63-2.34%, P 1.54-2.75%, K 0.83-1.76%), meeting the needs throughout the entire growth period. Pond mud replenishes Ca / Mg, and fermented and decomposed waste fruit provides highly active potassium (1200mg / 100g) and iron and zinc, solving the problem of nutrient imbalance in saline soil.

[0032] The fermented and decomposed waste fruit is made by naturally fermenting spoiled longan and / or waste lychee in a reaction tank.

[0033] Longan contains various nutrients, including vitamins A and B, with a relatively high content of protein, fat, and various minerals. Every 100 grams of longan pulp contains 12%–23% total sugar, 26.91% glucose, 1.26% tartaric acid, 1.41% protein, 0.45% fat, 163.7 mg of vitamin C, 196.6 mg of vitamin K, as well as vitamins B1, B2, and P. It also contains 35 mg of iron, 2 mg of calcium, 110 mg of phosphorus, 1200 mg of potassium, and various other minerals, as well as various amino acids, saponins, X-glycine, tannins, and choline.

[0034] Lychee is rich in nutrients. Every 100 grams of lychee pulp contains 0.7 grams of protein, 0.6 grams of fat, 13.3 grams of carbohydrates, 6 milligrams of calcium, 34 milligrams of phosphorus, 0.5 grams of iron, 193 milligrams of potassium, 17.8 milligrams of magnesium, as well as various vitamins, organic acids, pectin, etc.

[0035] The fermented, decomposed, and dried vegetable waste consists of branches, vines, leaves, and melons and vegetables with no commercial value that are discarded after harvesting during the vegetable planting process. After drying until the water content is reduced by 60-70%, the waste is crushed into powder by a pulverizer, mixed with microbial inoculum, and placed into a reaction tank for fermentation.

[0036] Vegetable waste mainly contains cellulose, vitamins, and minerals, including vitamins A, B, and C, as well as iron, calcium, and phosphorus. The leaves are particularly high in vitamin C, with approximately 190 mg of vitamin C per 100 grams of winter melon leaves. Winter melon vines also contain abundant vitamin C and the trace element potassium.

[0037] The fermented and decomposed chicken feathers are made from waste chicken feathers from poultry slaughterhouses, which are dried to 80% moisture content, crushed by a pulverizer, mixed with microbial inoculum, and then placed into a reaction tank for fermentation.

[0038] Chicken feathers are a natural, inexpensive, high-protein resource, containing approximately 90%–97% keratin, as well as fat, vitamins, minerals, and abundant collagen and sulfur-containing amino acids. They also contain 9.64% nitrogen, 0.11% phosphorus, and 0.15% potassium, making them a nitrogen-rich, amino acid-based fertilizer. The amino acids provide an organic carbon source that can be directly absorbed by crops, improving crop quality, enhancing their resistance to salinity, and improving the ecological environment. The minerals and vitamins in chicken feathers can enhance the immunity and disease resistance of plants and animals, reducing the probability of disease occurrence.

[0039] The fermented and decomposed chicken manure is produced by adding 5% urea and microbial inoculum to chicken manure, mixing them evenly, and then loading them into a reaction tank for fermentation.

[0040] Chicken manure is a high-quality organic fertilizer, rich in nutrients, mainly including: nitrogen (1.63%-2.34%), phosphorus (P2O5) (approximately 1.54%-2.75%), and potassium (K2O) (approximately 0.83%-1.76%). Dried chicken manure can contain up to 26% crude protein and is rich in amino acids, organic matter, and trace elements. These elements are crucial for plant growth, effectively promoting crop growth, improving soil fertility, and enhancing resistance to adverse conditions.

[0041] The fermented corn husks are made by sun-drying green corn husks and / or corn cobs until they lose 70% of their moisture, then crushing them in a pulverizer, adding microbial inoculum, stirring evenly, and then loading them into a reaction tank for fermentation.

[0042] The fermented rice husks are purchased from rice processing plants and obtained through physical fermentation after steaming.

[0043] The microbial organic fertilizer made from winter melon waste includes 20-50 parts of microbial flora combination enzyme yeast agent and 100-200 parts of winter melon waste organic fertilizer.

[0044] The process involves obtaining inoculum, preserving the strain at a 1:1 ratio, culturing the strain at a 1:1 ratio, propagating the original microbial community at a 1:1 ratio, liquid fermenting the strain at a 1:1 ratio, and drying the preparation to produce a microbial community combined enzyme yeast agent.

[0045] The prepared winter melon waste organic fertilizer and microbial flora combined with enzyme yeast were pretreated by shearing and stirring in a 3t reaction tank, then mixed evenly and fermented. After enzymatic hydrolysis and maturation, the mixture was filtered, separated into dry and wet products, and dried to obtain winter melon waste microbial organic fertilizer.

[0046] The pond mud was collected from the pond, dried, sieved, and disinfected.

[0047] This invention also provides a method for preparing organic microbial fertilizer for winter melon cultivation in saline-alkali land, the method being:

[0048] Step 101: Mix fermented and decomposed dried vegetable waste, fermented and decomposed chicken feathers, fermented and decomposed waste fruit, decomposed corn husks, decomposed rice husks, fermented and decomposed chicken manure, charcoal residue, pond mud, and winter melon waste microbial organic fertilizer evenly. Then add humic acid, potassium dihydrogen phosphate, carbendazim, rooting powder, and polyacrylamide according to the formula and mix thoroughly. Add 1 part of 50% carbendazim and prepare a 1:800-1000 dilution for sterilization. Add 1% enzyme bacteria and 20% water for secondary fermentation. Ferment until the unit volume weight no longer decreases to obtain the first saline-alkali land winter melon cultivation organic microbial fertilizer.

[0049] Step 102: Mix the first saline-alkali land winter melon cultivation organic microbial fertilizer and winter melon waste microbial organic fertilizer at a volume ratio of 2:1 and stir evenly to obtain the second saline-alkali land winter melon cultivation organic microbial fertilizer.

[0050] Step 103: Dissolve urea, potassium dihydrogen phosphate and potassium sulfate in water and add them to the first organic microbial fertilizer for winter melon cultivation in saline-alkali land. Mix them evenly to obtain the third organic microbial fertilizer for winter melon cultivation in saline-alkali land.

[0051] Dissolve urea, potassium dihydrogen phosphate and potassium sulfate in the solution, then add them to the second saline-alkali land winter melon cultivation organic microbial fertilizer, mix them evenly, and then add the fourth saline-alkali land winter melon cultivation organic microbial fertilizer.

[0052] The amount of urea added is 1-3% of the target fertilizer mass, the amount of potassium dihydrogen phosphate added is 1-5% of the target fertilizer mass, and the amount of potassium sulfate added is 0.3% of the target fertilizer mass dissolved in water.

[0053] Step 104: Mix the first organic microbial fertilizer for winter melon cultivation in saline-alkali land and the second organic microbial fertilizer for winter melon cultivation in saline-alkali land at a mass ratio of 1:1 to obtain the fifth organic microbial fertilizer for winter melon cultivation in saline-alkali land.

[0054] Step 105: Mix the first, second, third, fourth, and fifth saline-alkali soil winter melon organic microbial fertilizers in a 1:1:1:1:1 ratio, then add 1-3% acetic acid and mix thoroughly to obtain the final saline-alkali soil winter melon organic microbial fertilizer product.

[0055] Example 1

[0056] The final product of the organic microbial fertilizer for winter melon cultivation in saline-alkali land was placed in a foam cultivation box (60cm long, 45cm wide, and 30cm high). Three winter melon seedlings with four leaves and one bud were transplanted into the foam box. Throughout the experiment, the plant was irrigated only with seawater from near Jinshajin, Zhanjiang City, with a salinity of 0.6%. A drip-arrow system was selected in the cultivation box. Samples were periodically taken from the cultivation box for physicochemical property testing, plant growth and physiological indicators measurement, and winter melon yield determination. This implementation method shows that the winter melon plants can grow normally in the drip-arrow infiltration test with 0.6% seawater in saline-alkali land, exhibiting normal leaf growth, no difference in leaf area, normal root growth, and normal vigor. Each main vine produces 1-2 fruits, and each lateral vine produces 1-2 fruits, resulting in a positive yield. This substrate formula has low production costs, safe and rapid planting, is easy to manage, convenient to operate, and the method is simple and easy to understand, showing broad application prospects.

[0057] Control group: Products purchased from Meituan were kept the same in all other conditions.

[0058] Location: Experimental site, Wanglong New Village, Mazhang District, Zhanjiang

[0059] This embodiment demonstrates that organic microbial fertilizer for winter melon cultivation in saline-alkali land can promote the normal physiological and reproductive growth of winter melon plants, resulting in greener leaves, increased leaf area, and more developed root systems. After transplanting, the plants exhibit vigorous growth, produce more fruit, and increase yield. This substrate formula has low production costs, is safe and fast to plant, easy to manage, convenient to operate, and simple and easy to understand, showing broad application prospects.

[0060] Control experiment

[0061] I. Data Group

[0062] Experimental group: Final product of organic microbial fertilizer for winter melon cultivation in saline-alkali land

[0063] Control groups: ordinary commercial matrix (CK1), formula for removing only chicken feathers (CK2), formula for removing only spoiled fruit (CK3), and formula for removing only polyacrylamide (CK4).

[0064] Cultivation conditions: salt concentration: 0.6% NaCl (simulating severely saline-alkali land), planting density: 3 plants / box (60×45×30cm), irrigation: pure water drip irrigation (to eliminate interference from external nutrients).

[0065] II. Experimental Data

[0066] 1. Improvement of soil physical and chemical properties (sampling 60 days after planting)

[0067]

[0068] 2. Plant physiological response

[0069] Index Experimental group CK1 Promotion rate Mechanism corresponding SOD activity (U / g FW) 382.6 121.5 +215％ Chicken feather sulfur-containing amino acid activated antioxidant enzyme Proline (μg / g) 186.7 432.9 -57％ Reduced osmotic adjustment requirement Root activity (TTC μg / g / h) 1.32 0.48 +175％ Humic acid-baobab powder synergistic root promotion Chlorophyll SPAD value 52.3 36.1 +45％ Chelated iron and magnesium to improve photosynthetic efficiency

[0070] 3. Disease resistance and yield performance

[0071] Index Experimental group CK1 Mechanism corresponding Blight incidence 7.3％ 63.5％ Bacillus inhibits soil-borne pathogens Single fruit number 3.8 1.2 Reproductive growth maintenance under salt stress Single fruit weight (kg) 6.42 3.87 Nutrient slow-release system sustained fertilizer supply Fruit VC content (mg / 100g) 29.7 19.8 Secondary metabolite synthesis enhancement

[0072] III. Overall Effect Comparison

[0073] Performance Experimental group Conventional saline-alkali land improvement method Soil EC value reduction 75.9％ 40-50％ Salt injury symptom appearance time No appearance 20-30 days after planting Yield (kg / mu) 5820 2200-2800 Fertilizer cost (yuan / mu) 760 1200-1500

[0074] IV. Conclusion

[0075] This invention achieves soil remediation through a waste co-conversion-physical salt inhibition-biological induction mechanism: Na +It reduces the salt content by 73% and increases available phosphorus by 3.5 times; the salt damage index drops to 5 (CK1 is 82). Traditional technology believes that winter melon will fail when the salinity is >0.3%, but this formula still achieves a single fruit weight of 6.42kg at a salinity of 0.6% (exceeding the standard of 5.0kg for commercial fruit in non-saline land), breaking through the physiological limits of crops.

Claims

1. An organic microbial fertilizer for winter melon cultivation in saline-alkali land, characterized in that, It is composed of the following substances in parts by weight: 20-50 parts fermented and decomposed dried vegetable waste, 50-100 parts fermented and decomposed chicken feathers, 10-20 parts fermented and decomposed waste fruit, 20-50 parts decomposed corn husks, 10-20 parts decomposed rice husks, 20 parts fermented and decomposed chicken manure, 10 parts charcoal residue, 20-25 parts pond mud, 30-40 parts winter melon waste microbial organic fertilizer, 1-3 parts humic acid, 1-5 parts potassium dihydrogen phosphate, 1 part carbendazim, 1-5 parts rooting powder, and 1 part polyacrylamide.

2. The organic microbial fertilizer for winter melon cultivation in saline-alkali land according to claim 1, characterized in that, The fermented and decomposed waste fruit is made by naturally fermenting spoiled longan and / or waste lychee in a reaction tank.

3. The organic microbial fertilizer for winter melon cultivation in saline-alkali land according to claim 1 or 2, characterized in that, The fermented, decomposed, and dried vegetable waste consists of branches, vines, leaves, and melons and vegetables with no commercial value that are discarded after harvesting during the vegetable planting process. After drying until the water content is reduced by 60-70%, the waste is crushed into powder by a pulverizer, mixed with microbial inoculum, and placed into a reaction tank for fermentation.

4. The organic microbial fertilizer for winter melon cultivation in saline-alkali land according to claim 3, characterized in that, The fermented and decomposed chicken feathers are made from waste chicken feathers from poultry slaughterhouses, which are dried to 80% moisture content, crushed by a pulverizer, mixed with microbial inoculum, and then placed into a reaction tank for fermentation.

5. The organic microbial fertilizer for winter melon cultivation in saline-alkali land according to claim 4, characterized in that, The fermented and decomposed chicken manure is produced by adding 5% urea and microbial inoculum to chicken manure, mixing them evenly, and then loading them into a reaction tank for fermentation.

6. The organic microbial fertilizer for winter melon cultivation in saline-alkali land according to claim 5, characterized in that, The fermented corn husks are made by sun-drying green corn husks and / or corn cobs until they lose 70% of their moisture, then crushing them in a pulverizer, adding microbial inoculum, stirring evenly, and then loading them into a reaction tank for fermentation.

7. A method for preparing organic microbial fertilizer for winter melon cultivation in saline-alkali land as described in any one of claims 1-6, characterized in that, The method is as follows: Mix fermented and decomposed dried vegetable waste, fermented and decomposed chicken feathers, fermented and decomposed waste fruit, decomposed corn husks, decomposed rice husks, fermented and decomposed chicken manure, charcoal residue, pond mud, and winter melon waste microbial organic fertilizer evenly. Then add humic acid, potassium dihydrogen phosphate, carbendazim, rooting powder, and polyacrylamide according to the formula and mix thoroughly. Add 1 part of 50% carbendazim and prepare a 1:800-1000 dilution for sterilization. Add 1% enzyme bacteria and 20% water for secondary fermentation. Ferment until the unit volume weight no longer decreases to obtain the first saline-alkali land winter melon cultivation organic microbial fertilizer. The second organic microbial fertilizer for winter melon cultivation in saline-alkali land was prepared by using the first organic microbial fertilizer for winter melon cultivation in saline-alkali land and the microbial organic fertilizer from winter melon waste. The third organic microbial fertilizer for winter melon cultivation in saline-alkali land was prepared by using the first organic microbial fertilizer for winter melon cultivation in saline-alkali land. Organic microbial fertilizer for winter melon cultivation in the second saline-alkali land was used to prepare organic microbial fertilizer for winter melon cultivation in the fourth saline-alkali land. A fifth organic microbial fertilizer for winter melon cultivation in saline-alkali land was prepared by using the first and second organic microbial fertilizers for winter melon cultivation in saline-alkali land. The first, second, third, fourth, and fifth organic microbial fertilizers for winter melon cultivation in saline-alkali land are mixed in a ratio of 1:1:1:1:1, and then 1-3% acetic acid is added and thoroughly mixed to obtain the final product of organic microbial fertilizer for winter melon cultivation in saline-alkali land.

8. The preparation method according to claim 7, characterized in that, The process of preparing the second organic microbial fertilizer for winter melon cultivation in saline-alkali land by using the first organic microbial fertilizer for winter melon cultivation in saline-alkali land and the microbial organic fertilizer for winter melon waste specifically includes: mixing the first organic microbial fertilizer for winter melon cultivation in saline-alkali land and the microbial organic fertilizer for winter melon waste in a volume ratio of 2:1 and stirring evenly to obtain the second organic microbial fertilizer for winter melon cultivation in saline-alkali land.

9. The preparation method according to claim 7, characterized in that, The process of preparing the third organic microbial fertilizer for winter melon cultivation in saline-alkali land using the first organic microbial fertilizer for winter melon cultivation in saline-alkali land specifically includes: dissolving urea, potassium dihydrogen phosphate and potassium sulfate, adding them to the first organic microbial fertilizer for winter melon cultivation in saline-alkali land, mixing them evenly, and obtaining the third organic microbial fertilizer for winter melon cultivation in saline-alkali land. The process of preparing the fourth saline-alkali land winter melon organic microbial fertilizer from the second saline-alkali land winter melon cultivation organic microbial fertilizer specifically includes: dissolving urea, potassium dihydrogen phosphate and potassium sulfate, then adding them to the second saline-alkali land winter melon cultivation organic microbial fertilizer, mixing them evenly, and obtaining the fourth saline-alkali land winter melon cultivation organic microbial fertilizer. The amount of urea added is 1-3% of the target fertilizer mass, the amount of potassium dihydrogen phosphate added is 1-5% of the target fertilizer mass, and the amount of potassium sulfate added is 0.3% of the target fertilizer mass dissolved in water.

10. The preparation method according to claim 7, characterized in that, The process of preparing the fifth organic microbial fertilizer for winter melon cultivation in saline-alkali land using the first and second organic microbial fertilizers for winter melon cultivation in saline-alkali land specifically includes: mixing the first and second organic microbial fertilizers for winter melon cultivation in saline-alkali land at a mass ratio of 1:1 to obtain the fifth organic microbial fertilizer for winter melon cultivation in saline-alkali land.

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