Method for fermenting and decomposing sheep manure into fertilizer and returning to field for carbon sequestration by applying silage corn

Abstract

The invention belongs to the technical field of livestock breeding and breeding combination, and particularly relates to a returning-to-field carbon sequestration method for fermenting and decomposing sheep manure into fertilizer and applying silage corn, and the method comprises the following steps: (1) mixing and proportioning sheep manure and auxiliary materials; (2) adding a fermentation inoculant; (3) fermentation field control; (4) carrying out first high-temperature fermentation on the sheep manure; (5) performing high-temperature fermentation on the sheep manure for the second time; (6) evaluating the maturity of the sheep manure; (7) returning the sheep manure decomposed fertilizer to the field as a base fertilizer; (8) sowing silage corn; (9) applying a chemical fertilizer in a reduced manner in the heading stage of the silage corn; and (10) harvesting the silage corn. The sheep manure secondary high-temperature rapid fermentation and decomposition method is innovated, the temperature rise is fast, the fermentation period is short, the manure carbon emission is reduced, meanwhile, the sheep manure can be safely returned to the field to be applied to the silage corn, the chemical fertilizer application amount and the application frequency of the silage corn can be reduced, the labor amount and the chemical fertilizer application amount are reduced, and the biological carbon sequestration amount of the silage corn is increased; the carbon sequestration level of returning soil is improved, the emission reduction and carbon sequestration effects are good, and the low-carbon green sustainable development of planting and breeding circulation agriculture in the Jiangsu coastal region is promoted.

Description

Technical Field

[0001] The invention belongs to the technical field of animal husbandry and breeding integration, and specifically relates to a method for fermenting sheep manure into fertilizer and applying silage corn to return it to the field to fix carbon. Background Art

[0002] With the large-scale and intensive development of my country's mutton sheep farming industry, the amount of mutton sheep manure has also increased. Sheep manure contains a large amount of plant fiber, which will produce a large amount of methane during the decomposition process. The manure itself contains a large amount of greenhouse gases, such as methane. Therefore, manure is one of the main sources of methane emissions in mutton sheep production.

[0003] The average organic matter content of sheep manure is converted at 25%. After each ton of sheep manure compost is returned to the field instead of chemical fertilizer, the theoretical maximum value of the soil organic carbon pool increases by about 140kg. However, in actual production applications, the fermentation and decomposition of sheep manure is incomplete, the carbon emissions are large, and the carbon fixation effect of applying silage corn is not good. There is no practical and simple method, which limits the carbon fixation of sheep manure organic fertilizer. How to scientifically apply sheep manure compost organic fertilizer to replace chemical fertilizer, which can not only meet the nutrient requirements of silage corn, but also reduce the carbon emissions of sheep manure and avoid the negative problems caused by the large-scale use of chemical fertilizers, is an actual production problem that needs to be solved.

[0004] In order to meet the needs of emission reduction and carbon fixation in the integrated farming and breeding model of "mutton sheep breeding + manure fertilizer + silage corn planting", there is an urgent need to find a carbon fixation method for fermenting sheep manure into fertilizer and applying silage corn, reduce the amount of sheep manure fertilizer to replace chemical fertilizer, increase the amount of biological carbon fixation in silage corn, improve the carbon fixation level of soil returned to the field, reduce carbon emissions, and promote the green and low-carbon development of my country's integrated farming and breeding industry. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a method for fermenting sheep manure into fertilizer and applying silage corn to return to the field to fix carbon. The method has strong practicability. While utilizing the sheep manure as fertilizer, it can also reduce the amount and frequency of chemical fertilizers applied to silage corn, increase the amount of biological carbon fixation of silage corn, improve the carbon fixation level of soil returned to the field, and reduce carbon fixation.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A method for returning sheep manure to fields and fixing carbon by fermenting and composting sheep manure into fertilizer and applying silage corn, comprising the following steps:

[0008] (1) Mixing and proportioning sheep manure and auxiliary materials: removing the outer plastic film of the discarded oyster mushroom residue, airing the oyster mushroom residue until the moisture content is 40%, crushing wheat straw, and mixing sheep manure, oyster mushroom residue and wheat straw according to the fresh weight ratio to obtain a mixture of sheep manure and auxiliary materials;

[0009] (2) Adding fermentation agent: Mix powdered manure fermentation agent (including Bacillus, actinomycetes, Trichoderma and yeast) and bran at a ratio of 1:10-20, and then evenly sprinkle it on the mixture of sheep manure and auxiliary materials obtained in step (1), and mix thoroughly;

[0010] (3) Fermentation site control: The width of the windrow-type aerobic fermentation composting is 2m to 3m, the height is 0.9m to 1.5m, and the pile length is adjusted according to the size of the site; the width of the trough-type aerobic fermentation composting is 10m to 12m, the height is 1.2m to 1.5m, and the pile length is adjusted according to the size of the site;

[0011] (4) The first high-temperature fermentation of sheep manure: When the manure pile can rise to 50°C in 2-5 days, the first composting is carried out; thereafter, the compost is turned every 1-2 days to fully replace the internal and bottom materials with the external and upper materials; the temperature of 10 different locations 40-60 cm below the surface of the pile is tested every day, and the average value is calculated as the composting temperature of the day;

[0012] (5) Second high-temperature fermentation of sheep manure: Turn the pile 1-2 times a day, the fermentation temperature is greater than 65°C, and the pile needs to be turned in time to dissipate heat, and the fermentation temperature is not higher than 70°C; after the high-temperature fermentation is completed, the moisture content of the manure pile is 30%-40%, the temperature is 45°C-50°C, and the pH is 7.0-8.4;

[0013] (6) Assessment of maturity of sheep manure: After high temperature fermentation, the mortality rate of Ascaris eggs is ≥95%, the number of fecal coliforms is ≤100 / g, the seed germination index is ≥70%, and the manure is fully mature;

[0014] (7) Returning sheep manure to the field as basal fertilizer: At the end of April each year, silage corn is used as basal fertilizer with 200kg to 1800kg of sheep manure per mu. The rotted manure is evenly spread on the ground. At the same time, 0kg to 47kg of compound fertilizer is applied. The fertilizer spread on the field surface is turned over by a rotary tiller into a 0cm to 20cm layer.

[0015] (8) Silage corn planting: Silage corn is planted in early May;

[0016] (9) Reduce the amount of chemical fertilizers applied during the heading period of silage corn: In mid-to-late June, during the heading period of silage corn, apply 0kg to 22kg of urea per mu as topdressing;

[0017] (10) Silage corn harvest: Silage corn is harvested at the end of July.

[0018] Furthermore, in step (1), the mixing mass ratio of sheep manure, oyster mushroom residue and wheat straw is 6-7:1-3:1-2, and the C / N ratio of the mixture of sheep manure and auxiliary materials is controlled at 25:1-30:1, and the moisture content is controlled at 55%-60%. When a handful of material is held tightly by hand, water marks can be seen between fingers but no water drips, and the material can be dispersed when it falls to the ground.

[0019] Furthermore, the fermentation time of the first high-temperature fermentation of the sheep manure is 7d to 10d, and the fermentation time of the second high-temperature fermentation of the sheep manure is 10d to 15d.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention innovates a method for rapid secondary high-temperature fermentation and composting of sheep manure, and innovatively proposes a dual-target breeding and farming cycle carbon fixation scheme of "fermentation and composting of sheep manure into fertilizer - silage corn carbon fixation - reduction and replacement of chemical fertilizers - returning to the field to fix carbon". The sheep manure, mushroom residue and wheat straw are optimized in ratio, and the temperature rises quickly and the fermentation cycle is short. While reducing the carbon emissions from manure, it can be safely returned to the field for application of silage corn. It can also reduce the amount and frequency of application of chemical fertilizers for silage corn, reduce labor and fertilizer application, increase the amount of biological carbon fixation of silage corn, and improve the carbon fixation level of soil returned to the field. It has a good emission reduction and carbon fixation effect, and can promote the low-carbon, green and sustainable development of breeding and farming cycle agriculture in the coastal areas of Jiangsu. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 The effect of different sheep manure fertilizer application rates on the carbon fixation of the whole corn plant;

[0024] Figure 2 The effect of different sheep manure application rates on soil carbon sequestration in the field;

[0025] In the figure: different lowercase letters indicate significant differences (P<0.05). DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The word "embodiment" used here as an "exemplary" does not necessarily mean that any embodiment described is superior to or better than other embodiments. Unless otherwise specified, the performance index tests in the embodiments of this application are performed using conventional test methods in the art. It should be understood that the terms described in this application are only used to describe specific implementation methods and are not used to limit the content disclosed in this application.

[0028] Unless otherwise specified, the technical and scientific terms used in this document have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs; other experimental methods and technical means not specifically specified in this application refer to experimental methods and technical means commonly used by ordinary technicians in this field.

[0029] In order to better illustrate the content of the present application, numerous specific details are provided in the specific examples below. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In the embodiments, some methods, means, instruments, equipment, etc. well known to those skilled in the art are not described in detail in order to highlight the main purpose of the present application.

[0030] Under the premise of no conflict, the technical features disclosed in the embodiments of the present application can be combined arbitrarily, and the resulting technical solutions belong to the contents disclosed in the embodiments of the present application.

[0031] The invention discloses a method for fermenting sheep manure into fertilizer and applying silage corn to return to the field and fix carbon.

[0032] In order to better understand the present invention, the present invention is further specifically described below through the following examples, but it should not be understood as a limitation of the present invention. Some non-essential improvements and adjustments made by technicians in this field based on the above invention content are also considered to fall within the protection scope of the present invention.

[0033] Embodiment 1:

[0034] A method for returning sheep manure to fields and fixing carbon by fermenting and composting sheep manure into fertilizer and applying silage corn, comprising the following steps:

[0035] (1) Mixing ratio of sheep manure and auxiliary materials: remove the outer plastic film of the discarded oyster mushroom residue, dry the oyster mushroom residue until the moisture content is 40%, crush the wheat straw, and mix them according to the fresh weight ratio of sheep manure: oyster mushroom residue: wheat straw = 7:2:1, the C / N of the material is controlled at 25:1, and the moisture is controlled at 60%. Hold a handful of the material with your hand, so that water marks can be seen between the fingers but no water drips, and it can be scattered when it falls to the ground;

[0036] (2) Addition of fermentation agent: Mix powdered manure fermentation agent (including Bacillus, Actinomycetes, Trichoderma and yeast) with bran at a ratio of 1:15, then evenly sprinkle it on the sheep manure and auxiliary materials and mix thoroughly;

[0037] (3) Fermentation site control: The width of the windrow-type aerobic fermentation composting is 2m to 3m, the height is 0.9m to 1.5m, and the pile length is adjusted according to the size of the site; the width of the trough-type aerobic fermentation composting is 10m to 12m, the height is 1.2m to 1.5m, and the pile length is adjusted according to the size of the site;

[0038] (4) The first high-temperature fermentation of sheep manure: When the manure pile can rise to 50℃ in 2-5 days, the first composting is carried out; after that, the pile is turned every 1-2 days to fully replace the internal and bottom materials with the external and upper materials; the temperature of 10 different locations 40-60 cm below the surface of the pile is tested every day, and the average value is calculated as the composting temperature of the day. The fermentation time is 7-10 days;

[0039] (5) Second high-temperature fermentation of sheep manure: Turn the pile 1-2 times a day. If the fermentation temperature is higher than 65°C, turn the pile in time to dissipate heat. The fermentation temperature should not be higher than 70°C and continue to ferment for 10-15 days. After the high-temperature fermentation is completed, the moisture content of the manure pile is 30%-40%, the temperature is 45-50°C, and the pH is 7.0-8.4.

[0040] (6) Assessment of maturity of sheep manure: After high temperature fermentation, the mortality rate of Ascaris eggs is ≥95%, the number of fecal coliforms is ≤100 / g, the seed germination index is ≥70%, and the manure is fully mature;

[0041] (7) Returning sheep manure to the field as basal fertilizer: At the end of April each year, sheep manure is used as basal fertilizer for corn silage. The rotted manure is evenly spread on the ground. 264.08 kg of sheep manure is used per mu of corn silage. At the same time, 46.67 kg of compound fertilizer is applied per mu as basal fertilizer. The fertilizer spread on the field is turned over by a rotary tiller into a 0 cm to 20 cm layer.

[0042] (8) Silage corn planting: The first crop of silage corn is planted in early May;

[0043] (9) Reduce the amount of chemical fertilizers applied during the heading period of silage corn: In mid-to-late June, during the heading period of silage corn, apply urea as a topdressing fertilizer once, at 21.74 kg per mu;

[0044] (10) Silage corn harvest: Silage corn is harvested at the end of July.

[0045] Embodiment 2:

[0046] A method for returning sheep manure to fields and fixing carbon by fermenting and composting sheep manure into fertilizer and applying silage corn, comprising the following steps:

[0047] Steps (1) to (6) are the same as in Example 1;

[0048] Step (7): at the end of April each year, the sheep manure is used as basal fertilizer and silage corn is used. The silage corn is evenly spread on the ground. 528.17 kg of sheep manure is used per mu of silage corn. At the same time, 26.67 kg of compound fertilizer is used as basal fertilizer per mu. The fertilizer spread on the field surface is turned over by a rotary tiller into a 0 cm to 20 cm layer.

[0049] Steps (8)-(10) are the same as in Example 1.

[0050] Embodiment 3:

[0051] A method for returning sheep manure to fields and fixing carbon by fermenting and composting sheep manure into fertilizer and applying silage corn, comprising the following steps:

[0052] Steps (1) to (6) are the same as in Example 1;

[0053] Step (7) At the end of April each year, the sheep manure is used as silage corn as base fertilizer, and the silage corn is evenly spread on the ground. 792.25 kg of sheep manure is used per mu of silage corn. At the same time, 6.67 kg of compound fertilizer is used as base fertilizer per mu. The fertilizer spread on the field surface is turned over by a rotary tiller into a 0 cm to 20 cm layer;

[0054] Steps (8)-(10) are the same as in Example 1.

[0055] Embodiment 4:

[0056] A method for returning sheep manure to fields and fixing carbon by fermenting and composting sheep manure into fertilizer and applying silage corn, comprising the following steps:

[0057] Steps (1) to (6) are the same as in Example 1;

[0058] Step (7): at the end of April each year, the sheep manure fertilizer is used as silage corn as base fertilizer, and the silage corn is evenly spread on the ground. 1056.34 kg of sheep manure fertilizer is applied per mu of silage corn, and the fertilizer spread on the field is turned over by a rotary tiller into a 0 cm to 20 cm layer;

[0059] Step (8) is the same as in Example 1;

[0060] Step (9) reducing the amount of chemical fertilizer applied during the heading period of silage corn: in mid-to-late June, during the heading period of silage corn, apply urea as a topdressing fertilizer once, at a rate of 17.39 kg per mu;

[0061] Step (10) is the same as in Example 1.

[0062] Embodiment 5:

[0063] A method for returning sheep manure to fields and fixing carbon by fermenting and composting sheep manure into fertilizer and applying silage corn, comprising the following steps:

[0064] Steps (1) to (6) are the same as in Example 1;

[0065] Step (7): at the end of April each year, the sheep manure fertilizer is used as silage corn as base fertilizer, and the silage corn is evenly spread on the ground. 1320.42 kg of sheep manure fertilizer is applied per mu of silage corn, and the fertilizer spread on the field is turned over by a rotary tiller into a 0 cm to 20 cm layer;

[0066] Step (8) is the same as in Example 1;

[0067] Step (9) reducing the amount of chemical fertilizer applied during the heading period of silage corn: in mid-to-late June, during the heading period of silage corn, apply urea as a topdressing fertilizer once, at a rate of 10.87 kg per mu;

[0068] Step (10) is the same as in Example 1.

[0069] Embodiment 6:

[0070] A method for returning sheep manure to fields and fixing carbon by fermenting and composting sheep manure into fertilizer and applying silage corn, comprising the following steps:

[0071] Steps (1) to (6) are the same as in Example 1;

[0072] Step (7): at the end of April each year, the sheep manure is used as basal fertilizer with silage corn, and the silage manure is evenly spread on the ground. 1584.51 kg of sheep manure is used per mu of silage corn, and the fertilizer spread on the field is turned over by a rotary tiller into a 0 cm to 20 cm layer;

[0073] Step (8) is the same as in Example 1;

[0074] Step (9) reducing the amount of chemical fertilizer applied during the heading period of silage corn: in mid-to-late June, during the heading period of silage corn, apply urea as a topdressing fertilizer once, at a rate of 4.35 kg per mu;

[0075] Step (10) is the same as in Example 1.

[0076] Embodiment 7:

[0077] A method for returning sheep manure to fields and fixing carbon by fermenting and composting sheep manure into fertilizer and applying silage corn, comprising the following steps:

[0078] Steps (1) to (6) are the same as in Example 1;

[0079] Step (7): at the end of April each year, the sheep manure is used as basal fertilizer with silage corn, and the silage manure is evenly spread on the ground. 1760.56 kg of sheep manure is used per mu of silage corn, and the fertilizer spread on the field is turned over by a rotary tiller into a 0 cm to 20 cm layer;

[0080] Step (8) is the same as in Example 1;

[0081] Step (9) Harvesting silage corn: Harvesting silage corn at the end of July.

[0082] In order to further demonstrate the beneficial effects of the present invention and to better understand the present invention, the following experimental examples are used to further illustrate the technical features disclosed in the present invention, but they should not be understood as limiting the present invention. Other improvements made by those skilled in the art based on the above invention content without creative work are also considered to fall within the scope of protection of the present invention.

[0083] Select fermented and decomposed sheep manure organic fertilizer as basal fertilizer, plant silage corn, variety is Dajingjiu 26, and be randomly divided into 8 groups: control group (CON): 100% purified fertilizer, ternary compound fertilizer is used for basal fertilizer, and urea is used for ear fertilizer; T1 treatment group (embodiment 1): 85% chemical fertilizer+15% sheep manure fertilizer; T2 treatment group (embodiment 2): 70% chemical fertilizer+30% sheep manure fertilizer; T3 treatment group (embodiment 3): 55% chemical fertilizer+45% sheep manure fertilizer; T4 treatment group (embodiment 4): 40% chemical fertilizer+60% sheep manure fertilizer; T5 treatment group (embodiment 5): 25% chemical fertilizer+75% sheep manure fertilizer; T6 treatment group (embodiment 6): 10% chemical fertilizer+90% sheep manure fertilizer; T7 treatment group (embodiment 7): 100% sheep manure fertilizer, without chemical fertilizer.

[0084] Each treatment was repeated 3 times in random blocks, with each replicate being 6 m 2 The planting test field is located in the coastal area of ​​Jiangsu, and the test period is from April to July.

[0085] Control group: 100% pure fertilizer, according to the application of conventional fertilizer pure nitrogen amount 20kg / mu, that is, the application of base fertilizer compound fertilizer (15:15:15) 66.7kg (pure nitrogen 10kg), the late ear fertilizer urea application 21.7kg (pure nitrogen 10kg).

[0086] Sheep manure fermentation fertilization group: select this case embodiment.

[0087] The data were processed using Excel 2010 software, and one-way ANOVA was performed using SPSS 20.0. Duncan's method was used for multiple comparisons among groups, with P < 0.05 considered significant.

[0088] Test results:

[0089] Depend on Figure 1 It can be seen that compared with the control group (pure fertilizer application), the carbon fixation amount of the whole corn plant in the sheep manure organic fertilizer replacing chemical fertilizer application group in Example 1 did not change significantly (P>0.05), and the sheep manure organic fertilizer replacing chemical fertilizer application groups in Examples 2 to 7 increased to varying degrees compared with the pure fertilizer application group (P<0.05), among which the carbon fixation amount of the whole corn plant in the 90% sheep manure organic fertilizer replacing chemical fertilizer application group was the highest.

[0090] Depend on Figure 2 It can be seen that the soil carbon sequestration in the sheep manure organic fertilizer replacement chemical fertilizer application group in Examples 2 to 7 was compared with that in the control group, and the soil carbon sequestration in the returned field soil was increased to varying degrees (P < 0.05). Among them, the carbon sequestration of the whole corn plant in the 90% sheep manure organic fertilizer replacement chemical fertilizer application group was the highest, and the soil carbon sequestration in the 100% pure sheep manure organic fertilizer application group was slightly lower than that in the 90% sheep manure organic fertilizer replacement chemical fertilizer application group.

[0091] In specific implementation, the method of returning sheep manure to the field and fixing carbon by silage corn can be determined comprehensively based on the ease of operation and cost factors of the method.

[0092] According to the carbon emission rules during the fermentation and maturation of sheep manure and the planting time and fertilization requirements of silage corn, the present invention innovatively proposes a carbon fixation scheme of a dual-targeted breeding and farming cycle of "fermentation and maturation of sheep manure into fertilizer - carbon fixation of silage corn - reduction and substitution of chemical fertilizers - returning to the field to fix carbon". According to the climate and rainfall characteristics of the coastal areas of Jiangsu, the application of silage corn base fertilizer and heading fertilizer is reasonably carried out, and the application of jointing fertilizer is scientifically removed. An innovative secondary high-temperature rapid fermentation and maturation method of sheep manure has a fast heating rate and a short fermentation cycle. While reducing the carbon emission of manure, it can safely return to the field for application of silage corn, reduce the amount and frequency of application of chemical fertilizers for silage corn, reduce labor and fertilizer application, increase the amount of biological carbon fixation of silage corn, improve the carbon fixation level of soil returned to the field, and have a good emission reduction and carbon fixation effect, thereby promoting the low-carbon, green and sustainable development of breeding and farming cycle agriculture in the coastal areas of Jiangsu.

[0093] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for carbon fixation by fermenting sheep manure into fertilizer and applying silage corn to the field, characterized in that: The following steps are involved: (1) Mixing and proportioning sheep manure and auxiliary materials: removing the outer plastic film of the discarded oyster mushroom residue, and airing the oyster mushroom residue until the moisture content is 40%; crushing wheat straw, and mixing sheep manure, oyster mushroom residue and wheat straw according to the fresh weight ratio to obtain a mixture of sheep manure and auxiliary materials; (2) Adding fermentation agent: Mix the powdered manure fermentation agent and bran in proportion, and then evenly sprinkle them on the mixture of sheep manure and auxiliary materials obtained in step (1), and mix them thoroughly; (3) Fermentation site control: The fermentation manure pile method is arranged according to the site, including windrow aerobic fermentation composting and trough aerobic fermentation composting; (4) The first high-temperature fermentation of sheep manure: When the manure pile can rise to 50°C in 2-5 days, the first composting is carried out; thereafter, the compost is turned every 1-2 days to fully replace the internal and bottom materials with the external and upper materials; the temperature of 10 different locations 40-60 cm below the surface of the pile is tested every day, and the average value is calculated as the composting temperature of the day; (5) Second high temperature fermentation of sheep manure: Turn the pile 1-2 times a day, control the fermentation temperature and continue fermentation; (6) Assessment of maturity of sheep manure: After high temperature fermentation, the mortality rate of Ascaris eggs is ≥95%, the number of fecal coliforms is ≤100 / g, the seed germination index is ≥70%, and the manure is fully mature; (7) Returning sheep manure to the field as basal fertilizer: At the end of April every year, sheep manure and silage corn are used as basal fertilizer. The rotted manure and compound fertilizer are evenly spread on the ground, and the fertilizer spread on the field surface is turned over by a rotary tiller into a 0 cm to 20 cm layer; (8) Silage corn planting: Silage corn is planted in early May; (9) Reduce the amount of chemical fertilizers applied during the heading period of silage corn: In mid-to-late June, during the heading period of silage corn, apply 0kg to 22kg of urea per mu as topdressing; (10) Silage corn harvest: Silage corn is harvested at the end of July.

2. The method for carbon fixation by fermenting sheep manure into fertilizer and applying silage corn to the field according to claim 1, characterized in that: In step (1), the mixing mass ratio of sheep manure, oyster mushroom residue and wheat straw is 6-7:1-3:1-2, and the C / N ratio of the mixture of sheep manure and auxiliary materials is controlled at 25:1-30:1, and the moisture content is controlled at 55%-60%. When a handful of the material is held tightly by hand, water marks can be seen between the fingers but no water drips, and the material can be scattered when it falls to the ground.

3. The method for carbon fixation by fermenting sheep manure into fertilizer and applying silage corn to the field according to claim 1, characterized in that: The powdered manure fermentation agent comprises bacillus, actinomycetes, trichoderma and yeast, and the mass ratio of the powdered manure fermentation agent to bran is 1:10-20.

4. The method for carbon fixation by fermenting sheep manure into fertilizer and applying silage corn to the field according to claim 1, characterized in that: The parameters of the strip-type aerobic fermentation composting are: width 2m-3m, height 0.9m-1.5m, and the pile length is adjusted according to the size of the site; the parameters of the trough-type aerobic fermentation composting are: width 10m-12m, height 1.2m-1.5m, and the pile length is adjusted according to the size of the site.

5. The method for carbon fixation by fermenting sheep manure into fertilizer and applying silage corn to the field according to claim 1, characterized in that: The fermentation time of the first high-temperature fermentation of the sheep manure fertilizer is 7 days to 10 days, and the fermentation time of the second high-temperature fermentation of the sheep manure fertilizer is 10 days to 15 days.

6. The method for carbon fixation by fermenting sheep manure into fertilizer and applying silage corn to the field according to claim 1, characterized in that: During the second high-temperature fermentation of the sheep manure, if the fermentation temperature is greater than 65°C, the pile needs to be turned in time to dissipate heat, and the fermentation temperature is not higher than 70°C; and after the high-temperature fermentation is completed, the moisture content of the manure pile is 30% to 40%, the temperature is 45°C to 50°C, and the pH is 7.0 to 8.

4.

7. The method for carbon fixation by fermenting sheep manure into fertilizer and applying silage corn to the field according to claim 1, characterized in that: In the step (7), 200kg to 1800kg of decomposed sheep manure is applied as base fertilizer per mu of silage corn, and 0kg to 47kg of compound fertilizer is applied as base fertilizer.

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