Organic green manure, preparation method and application

Abstract

The invention relates to the technical field of fertilizers, in particular to an organic green manure and a preparation method and application thereof, and the preparation method comprises the following steps: mixing one or more of cow dung, sheep manure and chicken manure to obtain mixed manure; the carbon nitrogen ratio of the mixed excrement is adjusted to be 25: 1-30: 1; adding a liquid microbial compound strain into the mixed excrement with the adjusted carbon nitrogen ratio; stacking the mixed excrement added with the liquid microbial compound strain into a strip stack with the width of 2-3 m and the height of 1.5-2 m, and carrying out stack retting; the stack retting temperature is 55-70 DEG C; turning the stack once every 5-7 days, and carrying out stack retting for 15-30 days to obtain the organic green manure. The organic green manure provided by the invention can shorten the rapid decomposition period of organic matters in soil; transportation and storage cost is reduced, and transportation and storage are facilitated; the fertilizer has high decomposition degree and stable nutrients, can replace part of chemical fertilizers, reduces the field fertilization frequency, improves the soil structure for a long time and increases the crop yield.

Description

Technical Field

[0001] This invention relates to the field of fertilizer technology, specifically to an organic green manure, its preparation method, and its application. Background Technology

[0002] In traditional agricultural production, the long-term use of chemical fertilizers, while increasing crop yields, has also led to a series of ecological problems such as soil compaction, organic matter loss, and microbial community imbalance. Furthermore, excessive application of chemical fertilizers can cause eutrophication of water bodies, exacerbating environmental pollution. To address this challenge, organic green manure, as an environmentally friendly fertilizer, is gradually gaining attention. Organic green manure is typically made from livestock manure, plant residues, agricultural waste, or composted green manure crops. It can effectively improve soil structure, enhance water and fertilizer retention capacity, and provide abundant organic matter and trace elements.

[0003] However, the organic green manure fertilizers prepared by existing methods have low utilization rates when applied to soil. Summary of the Invention

[0004] To address the above problems, this invention provides an organic green manure, its preparation method, and its application.

[0005] This invention is achieved through the following technical solution: A method for preparing organic green manure includes the following steps: Mix one or more of cow dung, sheep dung, and chicken dung to obtain mixed manure; wherein, when two types of manure are used, their mass ratio is 1:1; when three types of manure are used, their mass ratio is 1:1:1.

[0006] The carbon-to-nitrogen ratio of the mixed feces is adjusted to 25:1 to 30:1.

[0007] Liquid microbial compound inoculum is added to the mixed feces with the carbon-nitrogen ratio adjusted, wherein the mass ratio of the liquid microbial compound inoculum to the mixed feces is 1:90~100.

[0008] The mixed manure with added liquid microbial compound inoculum is piled into windrows 2m-3m wide and 1.5m-2m high for composting; the composting temperature is 55℃-70℃; the pile is turned over every 5-7 days, and the composting lasts for 15-30 days to obtain organic green manure.

[0009] Preferably, the moisture content is maintained at 50% to 60% during the high-temperature composting process.

[0010] Preferably, the stacking method of the strips is to stack them in layers of 20cm to 30cm each.

[0011] The organic green manure prepared by the method described above is an organic green manure.

[0012] The application of the aforementioned organic green manure in improving soil structure.

[0013] Improving soil structure refers to increasing the content of nitrogen, phosphorus, potassium and organic matter in the soil.

[0014] Preferably, the specific application method is to apply the organic green manure to farmland at a rate of 800 kg to 1200 kg per mu.

[0015] The application of the aforementioned organic green manure in increasing crop yield.

[0016] Preferably, the crop is highland barley.

[0017] Preferably, the specific application method is to apply the organic green manure to farmland at a rate of 800 kg to 1200 kg per mu.

[0018] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a method for preparing organic green manure, comprising the following steps: mixing one or more of cow manure, sheep manure, and chicken manure to obtain mixed manure; wherein, when using two types of manure, their mass ratio is 1:1; when using three types of manure, their mass ratio is 1:1:1; adjusting the carbon-nitrogen ratio of the mixed manure to 25:1 to 30:1; adding liquid microbial compound inoculum to the mixed manure with the adjusted carbon-nitrogen ratio, wherein the mass ratio of the liquid microbial compound inoculum to the mixed manure is 1:90 to 100; piling the mixed manure after adding the liquid microbial compound inoculum into windrows 2m to 3m wide and 1.5m to 2m high for composting; the composting temperature is 55℃ to 70℃; turning the pile every 5 to 7 days, and composting for 15 to 30 days to obtain organic green manure. This invention utilizes high-temperature composting, achieving a compost temperature of 55-70℃, to effectively kill pathogens, parasite eggs (such as roundworm eggs and E. coli), and weed seeds in manure, reducing the high incidence of pests, diseases, and weeds caused by directly applying livestock manure to farmland. Furthermore, it employs a systematic approach by controlling key process parameters such as the carbon-to-nitrogen ratio (25:1 to 30:1), adding specific microbial agents (mass ratio 1:90 to 100), standardizing windrow construction (2-3 meters wide, 1.5-2 meters high), and regular turning (every 5-7 days). Systematic integration allows for the rapid decomposition of organic matter in manure after high-temperature composting, transforming it into simpler and more stable organic matter (humus) and inorganic mineral nutrients that plants can directly absorb and utilize. This results in higher composting levels and more stable nutrients, shortening the rapid decomposition cycle of organic matter compared to manure applied directly to the soil. The volume of the composted material is reduced by 30% to 50%, lowering transportation and storage costs and facilitating transport and storage. It can replace some chemical fertilizers, improving utilization rates, reducing the frequency of field fertilization, and improving soil structure and increasing crop yields in the long term. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A drawing showing the materials prepared for this invention.

[0021] Figure 2 This is a diagram showing the layered composting process according to the material proportions of the present invention.

[0022] Figure 3 This is a stacking diagram of the present invention. Detailed Implementation

[0023] To facilitate understanding of the present invention, a more comprehensive description is provided below, along with preferred embodiments. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the present invention.

[0024] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this invention and in its specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0025] The beneficial effects of the present invention will be illustrated below through specific embodiments.

[0026] Against the backdrop of increasing crop yields and reducing fertilizer use while improving efficiency, and to meet the current demand for organic and green fertilizers in the planting industry, this invention will conduct research and experiments on the recycling of composted green manure for crop and livestock farming in 2023-2024. Through experiments and tests, the nutrient content of several common and frequently used farmyard organic green manures in Tibet will be measured in both fresh and composted states. Changes in soil organic matter, microbial abundance, and other indicators after application will be analyzed and compared. The impact of farmyard organic green manures on crop growth, development, and biological output will be studied. The quality and fertility effects of these common and frequently used farmyard organic green manures will be comprehensively evaluated, suitable types of farmyard organic green manures will be screened, and their effectiveness and utilization value will be further determined, providing a scientific basis for the identification, demonstration, and promotion of farmyard manure applications.

[0027] The inventive concept of this invention is as follows: Organic green manure is usually made from livestock manure, plant residues, agricultural waste or green manure crops. It can effectively improve soil structure, enhance water and fertilizer retention capacity, and provide rich organic matter and trace elements.

[0028] However, the organic green manure fertilizers prepared by existing methods have low utilization rates when applied to soil.

[0029] Based on this, this invention constructs a standardized organic green manure preparation system with precise parameters and controllable processes. This invention systematically integrates key process parameters such as carbon-to-nitrogen ratio control (25:1 to 30:1), high-temperature composting (55℃ to 70℃), specific microbial agent addition (mass ratio 1:90 to 100), standardized windrow construction (2 to 3 meters wide, 1.5 to 2 meters high), and regular turning (every 5 to 7 days), forming a complete and mutually supportive process package. This process framework has strong adaptability, actively creating and maintaining the most suitable fermentation environment for the reproduction and operation of beneficial microorganisms based on the characteristics of single or specific proportions of raw materials such as cow manure, sheep manure, and chicken manure. Ultimately, this invention transforms the traditional experience-based composting process into a targeted and predictable industrial production process, ensuring that regardless of the compliant raw materials used, high-quality organic green manure with high maturity, balanced nutrients, and harmlessness can be produced efficiently and stably. It can replace some chemical fertilizers, improve utilization, reduce the frequency of field fertilization, and improve soil structure and increase crop yield in the long term.

[0030] Example 1: A method for preparing organic green manure Organic green manure is prepared using cow dung.

[0031] Remove stones, clods of soil, and other impurities from the manure. Avoid using manure contaminated with harmful substances, such as heavy metals or antibiotics, as this may affect the quality of composting and the safety of subsequent use.

[0032] Adjust the carbon-to-nitrogen ratio of cow manure to 25:1. If the carbon-to-nitrogen ratio is too high, decomposition will be slow; if it is too low, nitrogen will be lost, resulting in an unpleasant odor.

[0033] Liquid microbial compound inoculum was added to cow manure with an adjusted carbon-to-nitrogen ratio, at a mass ratio of 1:90. The liquid microbial compound inoculum was live bacteria mother liquor type I purchased from Qingdao Tiandiyuan Biotechnology Development Co., Ltd., which contains various beneficial bacteria such as lactic acid bacteria, spore-forming bacteria, actinomycetes, and growth-promoting bacteria, as well as proteases and cellulases.

[0034] The cow manure, after being inoculated with liquid microbial compound inoculum, is piled up in 20cm layers to form 2m wide and 1.5m high winds for composting, ensuring heat preservation. The composting temperature is 55℃. The pile is turned over every 5 days and composted for 15 days to obtain organic green manure.

[0035] During composting, the moisture content should be maintained at 50%. You can judge this by squeezing the material by hand; it should clump together but not drip water. If it's too wet, add dry material; if it's too dry, sprinkle water.

[0036] Precautions: Avoid rain; use a covering. Heavy metals and antibiotics should be noted. The composting site should be well-drained and away from water sources.

[0037] The uniform application rate of organic green manure is 1000 kg per mu, which is equivalent to 36 kg per plot.

[0038] Example 2: A method for preparing organic green manure Organic green manure is prepared using sheep manure.

[0039] Remove stones, clods of soil, and other impurities from the sheep manure. Avoid using manure contaminated with harmful substances, such as heavy metals or antibiotics, as this may affect the quality of composting and the safety of subsequent use.

[0040] Adjust the carbon-to-nitrogen ratio of sheep manure to 27:1. If the carbon-to-nitrogen ratio is too high, decomposition will be slow; if it is too low, nitrogen will be lost, resulting in an unpleasant odor.

[0041] Liquid microbial compound inoculum was added to sheep manure with an adjusted carbon-to-nitrogen ratio, at a mass ratio of 1:95. The liquid microbial compound inoculum was purchased from Qingdao Tiandiyuan Biotechnology Development Co., Ltd.

[0042] The sheep manure, after being inoculated with liquid microbial compound inoculum, is piled up in 25cm layers to form a 2.5m wide and 1.7m high winds for composting, ensuring heat preservation. The composting temperature is 60℃. The pile is turned over every 6 days and composted for 25 days to obtain organic green manure.

[0043] During composting, the moisture content should be maintained at 55%. You can judge this by squeezing the material by hand; it should clump together but not drip water. If it's too wet, add dry material; if it's too dry, sprinkle water.

[0044] Precautions: Avoid rain; use a covering. Heavy metals and antibiotics should be noted. The composting site should be well-drained and away from water sources.

[0045] The uniform application rate of organic green manure is 1000 kg per mu, which is equivalent to 36 kg per plot.

[0046] Example 3: A method for preparing organic green manure Organic green manure is prepared using chicken manure.

[0047] Remove stones, clods of soil, and other impurities from the chicken manure. Avoid using manure contaminated with harmful substances, such as heavy metals or antibiotics, as this may affect the quality of composting and the safety of subsequent use.

[0048] Adjust the carbon-to-nitrogen ratio of chicken manure to 30:1. If the carbon-to-nitrogen ratio is too high, decomposition will be slow; if it is too low, nitrogen will be lost, resulting in an unpleasant odor.

[0049] Liquid microbial compound inoculum was added to chicken manure with an adjusted carbon-to-nitrogen ratio, at a mass ratio of 1:100 between the liquid microbial compound inoculum and the chicken manure. The liquid microbial compound inoculum was purchased from Qingdao Tiandiyuan Biotechnology Development Co., Ltd.

[0050] Chicken manure with added liquid microbial compound inoculum is piled up in 30cm layers, forming 3m wide and 2m high stacks for composting, ensuring heat preservation; the composting temperature is 70℃; the pile is turned over every 7 days, and composting continues for 30 days to obtain organic green manure.

[0051] During composting, the moisture content should be maintained at 60%. This can be checked by hand; the compost should clump together but not drip water. If it's too wet, add dry material; if it's too dry, sprinkle water.

[0052] Precautions: Avoid rain; use a covering. Heavy metals and antibiotics should be noted. The composting site should be well-drained and away from water sources.

[0053] The uniform application rate of organic green manure is 1000 kg per mu, which is equivalent to 36 kg per plot.

[0054] Example 4: A method for preparing organic green manure Organic green manure is prepared using cow dung and sheep dung.

[0055] Remove stones, clods of soil, and other impurities from the manure. Avoid using manure contaminated with harmful substances, such as heavy metals or antibiotics, as this may affect the quality of composting and the safety of subsequent use.

[0056] Mix cow dung and sheep dung in a 1:1 mass ratio to obtain mixed manure.

[0057] The carbon-to-nitrogen ratio of the mixed feces should be adjusted to 25:1. If the carbon-to-nitrogen ratio is too high, decomposition will be slow; if it is too low, nitrogen will be lost, resulting in an odor.

[0058] Liquid microbial compound inoculum was added to the mixed feces with the carbon-nitrogen ratio adjusted, at a mass ratio of 1:90 between the liquid microbial compound inoculum and the mixed feces. The liquid microbial compound inoculum was purchased from Qingdao Tiandiyuan Biotechnology Development Co., Ltd.

[0059] The mixed manure, after adding liquid microbial compound inoculum, is piled up in 20cm layers to form a 2m wide and 1.5m high winds for composting, ensuring heat preservation; the composting temperature is 55℃; the pile is turned over every 5 days, and composting continues for 15 days to obtain organic green manure.

[0060] Moisture control: During high-temperature composting, the moisture content should be maintained at 50%. This can be judged by hand-kneading; the material should clump together but not drip water. If it is too wet, add dry material; if it is too dry, sprinkle water.

[0061] Precautions: Avoid rain; use a covering. Heavy metals and antibiotics should be noted. The composting site should be well-drained and away from water sources.

[0062] The uniform application rate of organic green manure is 1000 kg per mu, which is equivalent to 36 kg per plot.

[0063] Example 5: A method for preparing organic green manure Organic green manure is prepared using cow dung and chicken manure.

[0064] Remove stones, clods of soil, and other impurities from the manure. Avoid using manure contaminated with harmful substances, such as heavy metals or antibiotics, as this may affect the quality of composting and the safety of subsequent use.

[0065] Cow manure and chicken manure are mixed in a 1:1 mass ratio to obtain mixed manure.

[0066] The carbon-to-nitrogen ratio of the mixed feces should be adjusted to 27:1. If the carbon-to-nitrogen ratio is too high, decomposition will be slow; if it is too low, nitrogen will be lost, resulting in an odor.

[0067] Liquid microbial compound inoculum was added to the mixed feces with the carbon-nitrogen ratio adjusted, at a mass ratio of 1:95 between the liquid microbial compound inoculum and the mixed feces. The liquid microbial compound inoculum was purchased from Qingdao Tiandiyuan Biotechnology Development Co., Ltd.

[0068] The mixed manure, after adding liquid microbial compound inoculum, is piled up in 25cm layers to form windrows 2.5m wide and 1.7m high for composting, ensuring heat preservation; the composting temperature is 60℃; the pile is turned over every 6 days, and composting continues for 25 days to obtain organic green manure.

[0069] During composting, the moisture content should be maintained at 55%. You can judge this by squeezing the material by hand; it should clump together but not drip water. If it's too wet, add dry material; if it's too dry, sprinkle water.

[0070] Precautions: Avoid rain; use a covering. Heavy metals and antibiotics should be noted. The composting site should be well-drained and away from water sources.

[0071] The uniform application rate of organic green manure is 1000 kg per mu, which is equivalent to 36 kg per plot.

[0072] Example 6: A method for preparing organic green manure Organic green manure is prepared using sheep manure and chicken manure.

[0073] Remove stones, clods of soil, and other impurities from the manure. Avoid using manure contaminated with harmful substances, such as heavy metals or antibiotics, as this may affect the quality of composting and the safety of subsequent use.

[0074] Mix sheep manure and chicken manure in a 1:1 mass ratio to obtain mixed manure.

[0075] Adjust the carbon-to-nitrogen ratio of the mixed feces to 30:1. If the carbon-to-nitrogen ratio is too high, decomposition will be slow; if it is too low, nitrogen will be lost, resulting in odor.

[0076] Liquid microbial compound inoculum was added to the mixed feces with the carbon-nitrogen ratio adjusted, at a mass ratio of 1:100 between the liquid microbial compound inoculum and the mixed feces. The liquid microbial compound inoculum was purchased from Qingdao Tiandiyuan Biotechnology Development Co., Ltd.

[0077] The mixed manure, after adding liquid microbial compound inoculum, is piled up in 30cm layers to form a 3m wide and 2m high winds for composting, ensuring heat preservation; the composting temperature is 70℃; the pile is turned over every 7 days, and composting continues for 30 days to obtain organic green manure.

[0078] During composting, the moisture content should be maintained at 60%. This can be checked by hand; the compost should clump together but not drip water. If it's too wet, add dry material; if it's too dry, sprinkle water.

[0079] Precautions: Avoid rain; use a covering. Heavy metals and antibiotics should be noted. The composting site should be well-drained and away from water sources.

[0080] The uniform application rate of organic green manure is 1000 kg per mu, which is equivalent to 36 kg per plot.

[0081] Example 7: A method for preparing organic green manure Organic green manure is prepared using cow dung, sheep dung, and chicken dung.

[0082] Remove stones, clods of soil, and other impurities from the manure. Avoid using manure contaminated with harmful substances, such as heavy metals or antibiotics, as this may affect the quality of composting and the safety of subsequent use.

[0083] Mix cow dung, sheep dung, and chicken dung in a mass ratio of 1:1:1 to obtain mixed manure.

[0084] The carbon-to-nitrogen ratio of the mixed feces should be adjusted to 25:1. If the carbon-to-nitrogen ratio is too high, decomposition will be slow; if it is too low, nitrogen will be lost, resulting in an odor.

[0085] Liquid microbial compound inoculum was added to the mixed feces with the carbon-nitrogen ratio adjusted, at a mass ratio of 1:90 between the liquid microbial compound inoculum and the mixed feces. The liquid microbial compound inoculum was purchased from Qingdao Tiandiyuan Biotechnology Development Co., Ltd.

[0086] The mixed manure, after adding liquid microbial compound inoculum, is piled up in 20cm layers to form a 2m wide and 1.5m high winds for composting, ensuring heat preservation; the composting temperature is 55℃; the pile is turned over every 5 days, and composting continues for 15 days to obtain organic green manure.

[0087] During composting, the moisture content should be maintained at 50%. You can judge this by squeezing the material by hand; it should clump together but not drip water. If it's too wet, add dry material; if it's too dry, sprinkle water.

[0088] Precautions: Avoid rain; use a covering. Heavy metals and antibiotics should be noted. The composting site should be well-drained and away from water sources.

[0089] The uniform application rate of organic green manure is 1000 kg per mu, which is equivalent to 36 kg per plot.

[0090] In Examples 1-7 of this invention, the compost darkens in color after composting, becomes loose in texture, has no odor, and may contain white mycelium. The organic green manure prepared by this invention has an organic matter content ≥45%; total nutrient content (nitrogen + phosphorus pentoxide + potassium oxide) ≥5%; effective viable bacteria count ≥0.2 billion CFU / g; pH 5.5-5.8; and meets the organic fertilizer quality standard GB525-2012. The temperature is then reduced to ambient temperature.

[0091] Comparative Example 1 Farmyard manure: Cattle, sheep, and chicken manure simply piled up in farmers' homes. The standard usage of farmyard manure is 1000 kg per mu (approximately 0.16 acres), which translates to 36 kg per plot.

[0092] Comparative Example 2 Commercial organic fertilizer: NPK content is 5%, organic matter content is 45%, purchased from Gansu Pukang Modern Agricultural Industrialization Group Co., Ltd. The uniform application rate of this commercial organic fertilizer is 1000 kg per mu (approximately 667 square meters), equivalent to 36 kg per plot.

[0093] Experimental Example 1 The following experiments were conducted using Examples 1 to 7 and Comparative Examples 1 to 2 as examples.

[0094] A single-factor randomized block design was adopted with three replicates (I, II, III). Protective rows were set up around the perimeter. The plot was 6 meters long, 3.5 meters wide, and had an area of ​​21 square meters. The main barley varieties promoted were selected.

[0095] III. Field Arrangement in Communities The plot of land was divided into 30 equal-sized areas as shown in Table 1, and different fertilizers were applied to each area. Specifically, areas 01, 16, and 28 used organic green manure prepared from cow dung obtained in Example 1; areas 08, 17, and 27 used organic green manure prepared from sheep dung obtained in Example 2; areas 03, 13, and 23 used organic green manure prepared from chicken dung obtained in Example 3; areas 06, 20, and 29 used organic green manure prepared from cow and sheep dung obtained in Example 4; areas 10, 15, and 24 used organic green manure prepared from cow and chicken dung obtained in Example 5; areas 02, 11, and 25 used organic green manure prepared from sheep and chicken dung obtained in Example 6; areas 07, 19, and 30 used organic green manure prepared from cow, sheep, and chicken dung obtained in Example 7; areas 04, 12, and 22 were blank control groups without any fertilizer; areas 05, 14, and 21 used farmyard manure from Comparative Example 1; and areas 09, 18, and 26 used commercial organic fertilizer from Comparative Example 2. In this experiment, the application rate of all fertilizers was 1000 kg per mu. It should be noted that the results of the application rate of 800 kg to 1200 kg per mu were similar to those of this experiment, so they will not be described in detail here.

[0096] Table 1. Field division and fertilizer application in the plots IV. Requirements for Experimental Site and Field Management 1. The test site should be flat and have uniform soil fertility.

[0097] 2. The sowing period and sowing amount shall be determined according to the local conditions of the pilot area.

[0098] 3. Meticulous management during the growth period.

[0099] 4. Harvest at the right time and in a timely manner.

[0100] V. Content and Measurement Indicators of Yield Measurement Study 1. Before the experiment, samples of farmyard manure were taken and tested in both fresh and decomposed states. The tests included organic matter content, microbial content, effective nitrogen, phosphorus and potassium content, moisture, and pH value. Soil samples were taken and tested before sowing and after crop harvest.

[0101] 2. Conduct phenological observations: using the same methods as usual.

[0102] 3. Experimental planting: 1 square meter of plant sample was selected from each plot, and 5 plants were randomly selected from the sample for planting. The experiment was repeated 3 times.

[0103] 4. Yield determination: After mixing each plot, the grains are threshed and the air-dried weight is measured.

[0104] VI. Field records and indoor variety testing 1. Field management: land preparation quality, fertilization, irrigation, weeding and cultivation, lodging situation, and prevention and control of diseases, pests and weeds.

[0105] 2. Growth period: sowing period, seedling emergence period, heading period, flowering period, maturity period, etc.

[0106] 3. Morphological characteristics: basic seedlings, panicle formation rate, plant height, and panicle length.

[0107] 4. Economic traits: number of effective ears, number of grains per ear, grain weight per plant, thousand-grain weight, straw yield, and grain yield, etc.

[0108] VII. Experimental Requirements and Summary 1. The experiment summary should be completed according to the unified summary format.

[0109] 2. The units of measurement for the experiment shall be uniformly expressed as g, kg, cm, m, m 2 , hm 2 .

[0110] 3. Strengthen field observation and recording, and promptly complete data verification, data processing, and experimental summaries.

[0111] 4. After the annual test is completed, a written summary shall be completed in a timely manner, along with meteorological data during the pilot test period.

[0112] VIII. Test Results The experimental results are shown in Tables 2 and 3, where Table 2 shows the average results of three repeated experiments.

[0113] Table 2 Content of various substances in soil Table 3. Farmland Yield Increase Effect Based on rigorous field trial data, the organic green manure provided by this invention demonstrates significant and comprehensive superiority in improving soil fertility and increasing crop yield. Regarding soil improvement, as shown in Table 2, the organic green manure prepared by the method of this invention effectively improves various key soil nutrient indicators. Among them, the organic green manure prepared from chicken manure (Example 3) shows the most outstanding effect, with its hydrolyzable nitrogen (77 mg / kg) and available phosphorus (28.8 mg / kg) contents being 26.2% and 130% higher than the blank control group, respectively, and its activation capacity for phosphorus is particularly remarkable. Meanwhile, the chicken manure and the mixed manure from cattle / sheep / chicken (Example 7) increased soil organic matter by 29.9% and 18.4%, respectively. It is noteworthy that traditional farmyard manure (Comparative Example 1) and commercially available organic fertilizer (Comparative Example 2) did not show significant improvement effects on any core soil indicators; their values ​​were similar to or even lower than the blank group. This fully demonstrates the irreplaceable nature of the specific high-temperature composting preparation method of this invention in converting raw materials into efficient and stable fertility.

[0114] Regarding yield-increasing effects, the advantages of this invention are more evident. As shown in Table 3, the barley grain yield of all embodiments of this invention significantly exceeded that of the blank control group. Among them, the mixed manure of cattle / sheep / chicken (Example 7) performed best, with a yield of 231.67 kg / mu, which is 44.2% higher than the blank group (160.67 kg / mu), and its yield is also significantly higher than that of traditional farmyard manure and commercial organic fertilizer. In addition, chicken manure (Example 3) has a strong effect on promoting plant vegetative growth and achieved the highest straw yield (340.33 kg / mu). These data collectively demonstrate that the organic green manure of this invention can achieve high and stable crop yields by optimizing key agronomic traits such as ear number and thousand-grain weight.

[0115] In summary, the organic green manure and its preparation method of the present invention, through raw material combination and precise control of fermentation process, successfully produce a high-quality product that far surpasses existing traditional farmyard manure and commercial organic fertilizer in terms of rapid soil fertility improvement and significant increase in crop yield. Its technical effects are clear, and it has outstanding practical value and promotion prospects.

[0116] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0117] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. Those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of this invention should be determined by the appended claims.

Claims

1. A method for preparing organic green manure, characterized in that, Includes the following steps: Mix one or more of cow dung, sheep dung, and chicken dung to obtain mixed manure; wherein, when two types of manure are used, their mass ratio is 1:1; when three types of manure are used, their mass ratio is 1:1:

1. The carbon-to-nitrogen ratio of the mixed feces is adjusted to 25:1 to 30:1; Add liquid microbial compound inoculum to the mixed feces with the carbon-nitrogen ratio adjusted, wherein the mass ratio of the liquid microbial compound inoculum to the mixed feces is 1:90~100; The mixed manure with added liquid microbial compound inoculum is piled into windrows 2m-3m wide and 1.5m-2m high for composting; the composting temperature is 55℃-70℃; the pile is turned over every 5-7 days, and the composting lasts for 15-30 days to obtain organic green manure.

2. The method for preparing organic green manure as described in claim 1, characterized in that, During the high-temperature composting process, the moisture content is maintained at 50% to 60%.

3. The method for preparing organic green manure as described in claim 1, characterized in that, The stacking method of the strips is to stack them in layers of 20cm to 30cm each.

4. Organic green manure prepared by the method for preparing organic green manure as described in any one of claims 1 to 3.

5. The application of the organic green manure as described in claim 4 in improving soil structure.

6. The application as described in claim 5, characterized in that, Improving soil structure refers to increasing the content of nitrogen, phosphorus, potassium and organic matter in the soil.

7. The application as described in claim 5, characterized in that, The specific application method is to apply the organic green manure to farmland at a rate of 800 kg to 1200 kg per mu.

8. The application of the organic green manure as described in claim 4 in increasing crop yield.

9. The application as described in claim 8, characterized in that, The crop in question is barley.

10. The application as described in claim 8, characterized in that, The specific application method is to apply the organic green manure to farmland at a rate of 800 kg to 1200 kg per mu.

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