Compost and method for its production

Abstract

The present application provides a kind of compost and its preparation method, it is related to the technical field of organic fertilizer, compost includes the following weight parts of component: crop straw 900-1100 parts, animal excrement 200-300 parts, organic auxiliary material 100-200 parts, compound microbial inoculum 1.5-7.5 parts;The compound microbial inoculum includes lactic acid bacteria, bacillus licheniformis, thermophilic filamentous bacteria, actinomycetes, white rot fungus.The preparation method of compost mainly is: crop straw and organic auxiliary material are stacked, and solidified layer by layer;After evenly spattering animal excrement on each layer, inoculate compound microbial inoculum again;Hole is punched in the top of pile to monitor the moisture content in the pile in the process of composting;Composting process is carried out by turning over treatment.The composting treatment of the present application is carried out by using compound microbial inoculum, not only can speed up the composting speed, can also improve composting effect, to improve the nutrient content in compost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of organic fertilizer, in particular to a compost and a preparation method thereof. BACKGROUND

[0002] China has vast arable land, which is distributed in different geographical regions. However, the land in some areas is poor and not conducive to cultivation. In addition, the excessive use of pesticides and fertilizers for planting crops has caused soil structure damage and nutrient deficiency. In recent years, people have begun to use compost for planting to prevent further soil structure damage and to benefit the repair of damaged soil by supplementing nutrients.

[0003] Compost is an organic fertilizer that contains more nutrients than chemical fertilizers, has long and stable fertilizer effect, and is beneficial to the formation of soil solid particle structure, and can increase the soil's ability to retain water, heat, air, and fertilizer. Compost is usually prepared by fermenting a mixture of animal and plant waste, water, and microorganisms. Not only does it treat waste to avoid environmental pollution, but it also provides environmentally friendly biofertilizer for arable land.

[0004] Currently, the compost production method is complex, the preparation cost is high, the composting time is long, and the composting effect is poor, resulting in low nutrient content, which is not conducive to crop growth. The present application provides a compost and a preparation method thereof, which has good composting effect and contains a large amount of nutrients. SUMMARY

[0005] (I) Technical problems solved

[0006] In view of the deficiencies of the prior art, the present application provides a compost and a preparation method thereof, which solves the problems of long composting time, poor composting effect, and low nutrient content of the existing compost.

[0007] (II) Technical solutions

[0008] To achieve the above purpose, the present application is realized by the following technical solutions:

[0009] A compost, comprising the following components by weight: crop straw 900-1100 parts, animal excrement 200-300 parts, organic auxiliary material 100-200 parts, and composite microbial agent 1.5-7.5 parts.

[0010] The composite microbial agent comprises lactic acid bacteria, Bacillus licheniformis, Thermoascus lanuginosus, actinomycetes, and white rot fungi.

[0011] Preferably, the lactic acid bacteria, Bacillus licheniformis, Thermoascus lanuginosus, actinomycetes, and white rot fungi are in a weight ratio of 1:(1.8-2.1):(1.4-1.6):1:1.

[0012] Preferably, the crop straw is barley straw and corn straw in a weight ratio of 1:(2-3).

[0013] Preferably, the animal excrement is a mixture of pig manure, chicken manure and sheep manure in a weight ratio of 1:(1.5-1.8):(2-2.5).

[0014] Preferably, the organic auxiliary material is a mixture of at least two of peanut meal, rapeseed cake, oil cake, tung cake, tea cake, bean cake, soybean cake, mushroom residue and cassava residue.

[0015] A method for preparing compost, comprising the following steps:

[0016] Step one, uniformly mix the crop straw and the organic auxiliary material, then pile up and tamp the mixture layer by layer; inoculate the composite microbial agent after uniformly spraying the animal excrement on each layer, then pile up the next layer, and pile up 6-8 layers;

[0017] Step two, punch holes on the top of the pile to monitor the water content in the pile during the composting process to determine whether to add water.

[0018] Step three, turn the pile during the composting process, turn the uppermost layer to the layer above the lowermost layer in the middle layer, turn the lowermost layer in the middle layer to the uppermost layer, and turn the remaining layers in the middle layer from top to bottom in the order from bottom to top, add water as needed during the turning process, and continue to pile up until the composting is completed.

[0019] Preferably, the crop straw is pretreated, and the specific method is: wash and dry the crop straw, first soak it in water to make its moisture content reach more than 50%, then spray the rot-promoting liquid on its surface, after the surface is uniformly sprayed, turn the inside of the crop straw to the outside, continue to spray, and until the crop straw surface is uniformly covered with the rot-promoting liquid.

[0020] Preferably, the rot-promoting liquid comprises the following components: egg liquid 100-150 mL, vitamin 20-30 g, chlorophyll 1-2 g, xanthan gum 1-2 g, yeast powder 0.5-1 g, and the rest is distilled water to 1 L.

[0021] Preferably, the amount of animal excrement added decreases layer by layer from the upper layer to the lower layer, and the amount added in each layer is 80%-85% of the amount added in the previous layer.

[0022] Preferably, when inoculating the composite microbial agent, the inoculation amount in the middle layer is 1.2-1.4 times the inoculation amount in the lower layer and 1.5-1.8 times the inoculation amount in the upper layer.

[0023] (Three) beneficial effects

[0024] The present application provides a kind of compost and its preparation method.Compared with prior art, it has the following beneficial effects:

[0025] The present application uses composite microbial inoculant for composting, which not only accelerates the composting speed, but also improves the composting effect. The specific principle is as follows: during the temperature rising stage of composting, lactic acid bacteria decomposes sugars and organic matter in the compost raw materials, promoting the internal temperature of the compost; when the temperature of the compost rises above 45℃, Bacillus licheniformis, Thermomyces and actinomycetes play a major role in decomposition, mainly decomposing cellulose and hemicellulose in the compost raw materials. Bacillus licheniformis and Thermomyces are high-temperature active bacteria that work together to decompose cellulose and hemicellulose at a faster rate in high-temperature conditions, thus accelerating the composting process and improving the composting effect. The synergistic effect of actinomycetes can further improve the composting effect. During this high-temperature composting stage, white rot fungi can assist other microorganisms in resisting and reducing the impact of heavy metal toxicity on growth, thereby promoting composting. After the high-temperature stage ends, actinomycetes continue to play a role during the gradual cooling process, and work together with white rot fungi to decompose sugars, starch, and residual cellulose, hemicellulose, etc., thereby improving the composting effect and increasing the nutrient content in the compost. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are described clearly and completely. Obviously, the described embodiments are part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0027] The embodiments of the present application provide a kind of compost and its preparation method, which solves the problems of long composting time, poor composting effect and low nutrient content of existing composting.

[0028] To better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with specific embodiments.

[0029] Embodiment 1:

[0030] A kind of compost, including the following components by weight: 900 parts of barley straw and corn straw with a weight ratio of 1:2, 200 parts of a mixture of pig manure, chicken manure and sheep manure with a weight ratio of 1:1.5:2, 100 parts of a mixture of peanut meal, rapeseed cake and soybean meal with a mass ratio of 1:1:1, and 2.5 parts of a composite microbial inoculant.

[0031] The composite microbial inoculant includes lactic acid bacteria, Bacillus licheniformis, Thermomyces, actinomycetes and white rot fungi in a weight ratio of 1:1.8:1.4:1:1.

[0032] The method for preparing compost includes the following steps:

[0033] Step 1: Straw pretreatment:

[0034] Wash and dry the barley straw and corn stalks. First, soak them in water until the humidity reaches more than 50%. Then, spray the surface with a decomposition-promoting liquid. After the surface is evenly sprayed, turn them over so that the inside is turned to the outside. Continue spraying until the surface of the barley straw and corn stalks is evenly covered with the decomposition-promoting liquid.

[0035] The composting solution is a suspension containing the following components: 100mL egg liquid, 20g vitamins, 1g chlorophyll, 1g xanthan gum, 0.5g yeast powder, and the remainder is distilled water to make up to 1L.

[0036] Step 2: Mix barley straw, corn straw, peanut bran, rapeseed cake, and soybean cake evenly, then pile the mixture layer by layer and tamp it down; evenly sprinkle a mixture of pig manure, chicken manure, and sheep manure on each layer and then inoculate it with compound microbial agent, then pile up the next layer, for a total of 6 layers;

[0037] The amount of the mixture of pig manure, chicken manure, and sheep manure added decreases from the top layer to the bottom layer, with each layer adding 80% of the amount added to the previous layer.

[0038] When inoculating with compound microbial agents, the inoculation amount of the middle layer is 1.2 times that of the lower layer and 1.5 times that of the upper layer.

[0039] Step 3: Drill holes in the top of the pile to monitor the moisture content inside the pile during the composting process, in order to determine whether water needs to be added;

[0040] Step 4: Turn the pile once during the composting process. The composting process mainly includes the heating period, high temperature period, medium temperature period and composting period. On the third day after entering the heating period, turn the pile once. Turn the top layer to the layer above the bottom layer, that is, the bottom layer of the middle layer. Turn the bottom layer of the middle layer to the top layer. Turn the remaining layers of the middle layer from top to bottom in order from bottom to top. During the turning process, add water as needed until the moisture content of the composted material is above 50%, and then continue to pile until composting is complete.

[0041] Example 2:

[0042] A compost comprises the following components in parts by weight: 1000 parts of barley straw and corn straw in a weight ratio of 1:2; 250 parts of a mixture of pig manure, chicken manure and sheep manure in a weight ratio of 1:1.6:2.2; 150 parts of a mixture of tung oil cake, tea cake and soybean cake in a mass ratio of 1:1:1; and 4.5 parts of compound microbial agent.

[0043] The complex microbial agent comprises lactic acid bacteria, bacillus licheniformis, thermomyces lanuginosus, actinomyces and white rot fungus in a ratio of 1:2:1.5:1:1 by weight.

[0044] The preparation method of the compost comprises the following steps:

[0045] Step one, straw pretreatment:

[0046] The barley straw and corn straw are washed and dried, and then soaked in water to reach a moisture content of more than 50%. Then, the surface of the straw is sprayed with the rot-promoting liquid. After the surface is evenly sprayed, the inside of the straw is turned to the outside, and the spraying operation is continued until the surface of the barley straw and corn straw is evenly covered with the rot-promoting liquid.

[0047] The rot-promoting liquid is a suspension liquid comprising the following components: egg liquid 150 mL, vitamin 5 g, chlorophyll 2 g, xanthan gum 2 g, yeast powder 0.7 g, and the rest is distilled water to 1 L.

[0048] Step two, the barley straw, corn straw, tung stalk, tea stalk and bean cake are mixed evenly, and then the mixture is stacked layer by layer and tamped. The mixture of pig manure, chicken manure and sheep manure is evenly sprayed on each layer, and then the complex microbial agent is inoculated. Then, the next layer is stacked, and the stacking is performed for 7 layers.

[0049] The addition amount of the mixture of pig manure, chicken manure and sheep manure decreases layer by layer from the upper layer to the lower layer, and the addition amount of each layer is 85% of the addition amount of the upper layer.

[0050] When the complex microbial agent is inoculated, the inoculation amount of the middle layer is 1.3 times that of the lower layer and 1.7 times that of the upper layer.

[0051] Step three, holes are punched on the top of the stack to monitor the water content in the stack during the composting process to determine whether to add water.

[0052] Step four, two times of turning are performed during the composting process. The composting process mainly includes the temperature rising period, the high temperature period, the medium temperature period and the composting period. The first turning is performed on the third day after entering the temperature rising period, and the second turning is performed after the medium temperature period ends. Each time of turning is to turn the uppermost layer to the upper layer of the lowermost layer, i.e. the lowermost layer of the middle layer to the uppermost layer. The remaining layers of the middle layer are turned from bottom to top. Water is added to the composting material to reach a moisture content of more than 50% during the turning process, and then the stacking is continued until the composting is completed.

[0053] Example 3

[0054] A compost, comprising the following components by weight parts: 1100 parts of barley straw and corn straw at a weight ratio of 1:3, 300 parts of a mixture of pig manure, chicken manure and sheep manure at a weight ratio of 1:1.8:2.5, 200 parts of a mixture of tea dregs, soybean cake and mushroom residue at a mass ratio of 1:1:1, and 7.5 parts of a compound microbial agent.

[0055] The compound microbial agent comprises lactic acid bacteria, bacillus licheniformis, thermomyces lanuginosus, actinomyces and white rot fungus at a ratio of 1:2.1:1.6:1:1 by weight parts.

[0056] A preparation method of the compost, comprising the following steps:

[0057] Step one, straw pretreatment:

[0058] The barley straw and corn straw are washed and dried, first soaked in water to reach a humidity of more than 50%, then the surface is sprayed with a rot-promoting liquid, after uniform spraying, the inside is turned to the outside, and the spraying operation is continued until the surface of the barley straw and corn straw is uniformly covered with the rot-promoting liquid;

[0059] The rot-promoting liquid is a suspension, comprising the following components: 150 mL of egg liquid, 30 g of vitamin, 2 g of chlorophyll, 2 g of xanthan gum, 1 g of yeast powder, and the rest is distilled water to 1 L.

[0060] Step two, the barley straw, corn straw, tea dregs, soybean cake and mushroom residue are mixed uniformly, and then the mixture is stacked layer by layer and tamped; the mixture of pig manure, chicken manure and sheep manure is uniformly sprayed on each layer, and then the compound microbial agent is inoculated, after which the stacking of the upper layer is carried out, and the stacking is carried out for 8 layers.

[0061] The addition amount of the mixture of pig manure, chicken manure and sheep manure decreases layer by layer from the upper layer to the lower layer, and the addition amount of each layer is 85% of the addition amount of the upper layer.

[0062] When the compound microbial agent is inoculated, the inoculation amount of the middle layer is 1.4 times that of the lower layer and 1.8 times that of the upper layer.

[0063] Step three, holes are punched at the top of the stack to monitor the water content in the stack during the composting process to determine whether to add water.

[0064] Step four, three times of turning treatment are carried out during the composting process, and the composting process mainly includes the temperature rising period, the high temperature period, the medium temperature period and the composting period; once of turning treatment is carried out on the 3rd day and the 6th day after entering the temperature rising period, and once of turning treatment is carried out after the medium temperature period ends; each time of turning treatment turns the uppermost layer to the upper layer of the lowermost layer, i.e. the lowermost layer of the middle layer, turns the lowermost layer of the middle layer to the uppermost layer, and turns the remaining layers of the middle layer from bottom to top in the order of top to bottom; water is added as needed during the turning process to make the humidity of the composting material more than 50%, and then the stacking is continued until the composting is completed.

[0065] Comparative Example 1 differs from Example 2 in that:

[0066] Lactic acid bacteria are not included in the complex microbial agent.

[0067] Comparative Example 2 differs from Example 2 in that:

[0068] Thermomyces lanuginosus is not included in the complex microbial agent.

[0069] Comparative Example 3 differs from Example 2 in that:

[0070] Actinomyces is not included in the complex microbial agent.

[0071] Comparative Example 4 differs from Example 2 in that:

[0072] Trichoderma is not included in the complex microbial agent.

[0073] Comparative Example 5 differs from Example 2 in that:

[0074] Lactic acid bacteria and Actinomyces are not included in the complex microbial agent.

[0075] Comparative Example 6 differs from Example 2 in that:

[0076] Actinomyces and Trichoderma are not included in the complex microbial agent.

[0077] Comparative Example 7 differs from Example 2 in that:

[0078] Bacillus licheniformis is replaced with Bacillus subtilis.

[0079] Comparative Example 8 differs from Example 2 in that:

[0080] Trichoderma is replaced with Aspergillus niger.

[0081] Comparative Example 9 differs from Example 2 in that:

[0082] Thermomyces lanuginosus is replaced with Bacillus subtilis.

[0083] Comparative Example 10 differs from Example 2 in that:

[0084] The crop straw is not pretreated.

[0085] Comparative Example 11 differs from Example 2 in that:

[0086] Chlorophyll is not added to the rot-promoting solution.

[0087] Comparative Example 12 differs from Example 2 in that:

[0088] Xanthan gum is not added in the rot-promoting liquid.

[0089] Comparative Example 13 differs from Example 2 in that:

[0090] Vitamins and egg liquid are not added in the rot-promoting liquid.

[0091] Comparative Example 14 differs from Example 2 in that:

[0092] A conventional rot-promoting liquid is used, with humus and water as main raw materials. Comparative Example 15 differs from Example 2 in that:

[0093] The pig manure, chicken manure and sheep manure mixture is added in equal amounts per layer.

[0094] Comparative Example 16 differs from Example 2 in that:

[0095] The composite microbial agent is added in equal amounts per layer.

[0096] Test data

[0097] 1. The relevant parameters in the compost preparation process of Examples 1-3 and Comparative Examples 1-16 are recorded, and the data are shown in Table 1:

[0098] Table 1 - Relevant parameters in the compost preparation process of Examples 1-3 and Comparative Examples 1-16

[0099]

[0100]

[0101] 2. The nutrient components in the compost of Examples 1-3 and Comparative Examples 1-16 are detected, and the data are shown in Table 2:

[0102] Sample Organic matter content (%) Total nitrogen content (%) P2O5 content (%) K2O content (%) Example 1 60.2 3.9 3.4 4.1 Example 2 63.3 4.1 3.5 4.2 Example 3 61.7 4.0 3.4 4.0 Comparative Example 1 59.4 3.6 3.0 3.6 Comparative Example 2 59.2 3.7 2.9 3.7 Comparative Example 3 58.8 3.8 3.1 3.7 Comparative Example 4 58.0 3.6 3.0 3.6 Comparative Example 5 56.1 3.5 3.0 3.5 Comparative Example 6 55.6 3.5 2.8 3.6 Comparative Example 7 59.0 3.7 3.1 3.6 Comparative Example 8 58.4 3.6 3.0 3.7 Comparative Example 9 59.4 3.8 3.1 3.5 Comparative Example 10 53.2 3.1 2.5 3.1 Comparative Example 11 58.7 3.8 3.2 3.9 Comparative Example 12 59.5 3.7 3.0 3.9 Comparative Example 13 58.6 3.8 3.1 3.8 Comparative Example 14 56.3 3.5 2.9 3.2 Comparative Example 15 60.1 3.8 3.2 4.0 Comparative Example 16 59.6 3.9 3.3 3.9

[0103] From the test data in Tables 1 and 2, it can be seen that:

[0104] 1. The relevant data of Examples 1-3 show that the technical solution of the present application can significantly accelerate the composting progress and increase the nutrient content in the compost, and the nutrient content in the compost meets the national standards;

[0105] 2. The relevant data of Example 2 and Comparative Examples 1-9 show that the selection of the composite microbial agent of the present application has a more excellent effect of promoting composting, and the lactic acid bacteria, Bacillus licheniformis, Thermoascus lanuginosus, Actinomyces and white rot fungus have a synergistic effect, and deleting any one or two bacteria or using other bacteria instead will reduce the composting effect and have a certain impact on the nutrient content;

[0106] 3. The relevant data from Examples 2 and Comparative Examples 10-14 show that the formulation of the composting liquid of the present invention has the effect of promoting composting maturity, and the promoting effect is better than that of existing conventional composting liquids.

[0107] 4. The relevant data from Example 2 and Comparative Example 15 show that controlling the amount of animal excrement added to different layers is beneficial to improving the composting and maturation effect.

[0108] 5. The relevant data from Example 2 and Comparative Example 16 show that controlling the amount of compound microbial agent added to different layers is beneficial to improving the composting and maturation effect.

[0109] In summary, compared with existing technologies, it has the following beneficial effects:

[0110] 1. This invention uses a compound microbial agent for composting, which not only accelerates the composting process but also improves its effectiveness. The specific principle is as follows: During the heating phase of composting, lactic acid bacteria decompose sugars and organic matter in the composting materials, promoting internal heating. When the compost temperature reaches above 45°C, Bacillus licheniformis, thermophilic filamentous bacteria, and actinomycetes play a major decomposition role, primarily breaking down cellulose and hemicellulose in the composting materials. In particular, Bacillus licheniformis and thermophilic filamentous bacteria are thermophilic and active, working synergistically to decompose fibers at high temperatures. The rapid decomposition of sugars and hemicellulose accelerates the process, thus enhancing the decomposition effect. Combined with the synergistic effect of actinomycetes, this further improves the decomposition process. During this high-temperature decomposition stage, white-rot fungi assist other microorganisms in resisting and reducing the impact of heavy metal toxicity on growth, thereby promoting decomposition. After the high-temperature stage ends and the temperature gradually decreases, actinomycetes continue to play a role, working synergistically with white-rot fungi to decompose sugars, starches, and residual cellulose and hemicellulose, thereby enhancing the decomposition effect and increasing the nutrient content of the compost.

[0111] 2. In this invention, crop straw is pretreated before composting. The crop straw is first soaked and then sprayed with composting liquid to avoid the uniformity of composting liquid on the surface of crop straw affected by the subsequent soaking. The spraying of composting liquid helps to improve the composting effect and has a certain effect on the nutrients in the compost.

[0112] 3. The selection of the composting liquid in this invention, through the synergistic combination of chlorophyll, xanthan gum, yeast powder, vitamins and other components, significantly improves the composting effect and has a better composting effect than conventional humus composting liquid.

[0113] 4. This invention controls the amount of animal excrement added to different layers, with more animal excrement added to the upper layers, which helps control the composting effect and improves the nutrients in the compost.

[0114] 5、The present application controls the adding amount of the compound microbial agent in different layers, and the adding amount of the compound microbial agent in the middle layer is the most, and the adding amount of the compound microbial agent in the lower layer is the second, because the composting temperature of the middle layer is usually the highest, and the temperature of the lower layer is slightly lower than that of the middle layer, so the setting is conducive to promoting the compound microbial agent to improve the composting effect of the compost, and shortening the composting time.

[0115] It should be noted that, in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Elements

[0116] The above examples are only used to illustrate the technical solutions of the present application, but not limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A compost, characterized in that, It includes the following components by weight: 900-1100 parts crop straw, 200-300 parts animal excrement, 100-200 parts organic additives, and 1.5-7.5 parts compound microbial agent; The compound microbial agent includes lactic acid bacteria, Bacillus licheniformis, thermophilic filamentous bacteria, actinomycetes, and white-rot fungi, in a weight ratio of 1:(1.8-2.1):(1.4-1.6):1:

1.

2. The composting as described in claim 1, characterized in that, The crop straw is barley straw and corn straw in a weight ratio of 1:(2-3).

3. The composting as described in claim 1, characterized in that, The animal excrement is a mixture of pig manure, chicken manure, and sheep manure in a weight ratio of 1:(1.5-1.8):(2-2.5).

4. The composting as described in claim 1, characterized in that, The organic auxiliary material is a mixture of at least two of the following: peanut bran, rapeseed cake, oil cake, tung oil cake, tea cake, soybean cake, soybean meal, mushroom residue, and cassava residue.

5. The method for preparing compost according to any one of claims 1-4, characterized in that, Includes the following steps: Step 1: Mix crop straw and organic additives evenly, then pile the mixture layer by layer and tamp it down. Sprinkle animal excrement evenly on each layer before inoculating with compound microbial agent. Then pile up the next layer, 6-8 layers in total. The amount of animal excrement added should decrease from the top to the bottom layer, with each layer adding 80%-85% of the amount added in the previous layer. When inoculating with compound microbial agent, the amount of inoculation in the middle layer should be 1.2-1.4 times that of the lower layer and 1.5-1.8 times that of the upper layer. Step 2: Drill holes in the top of the pile to monitor the moisture content inside the pile during the composting process, in order to determine whether water needs to be added; Step 3: During the composting process, turn the pile over. Turn the top layer over to the layer above the bottom layer, that is, the bottom layer of the middle layer. Turn the bottom layer of the middle layer over to the top layer. Turn the remaining layers of the middle layer from top to bottom in order from bottom to top. Add water as needed during the turning process, and continue to pile until composting is complete.

6. The method for preparing compost as described in claim 5, characterized in that, The specific method for pre-treating straw is as follows: wash and dry the crop straw, soak it in water until the humidity reaches more than 50%, then spray the surface with a decomposition-promoting liquid. After the surface is evenly sprayed, turn the crop straw over so that the inside is turned to the outside, and continue spraying until the entire surface of the crop straw is evenly covered with the decomposition-promoting liquid.

7. The method for preparing compost as described in claim 6, characterized in that, The fermentation solution comprises the following components: 100-150mL of egg liquid, 20-30g of vitamins, 1-2g of chlorophyll, 1-2g of xanthan gum, 0.5-1g of yeast powder, and the remainder is distilled water to make up to 1L.

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