Synergistic method for rapidly creating soil high-temperature sterilization environment and improving quality of soil

Abstract

The invention relates to the technical field of agricultural biology, in particular to a synergistic method for rapidly creating a soil high-temperature sterilization environment and improving soil quality. The synergistic method comprises the steps of material combined application, soil ploughing, soil humidity regulation and control and high-temperature greenhouse closing. Wherein in the material application process, the rotten vegetable straw, the crop straw, the straw decomposition agent and the distillers' grains are mixed and then spread on the surface of the soil. According to the method, waste vegetable straw produced by a facility vegetable field is comprehensively utilized to be mixed with crop straw, a straw decomposition agent and brewing waste vinasse for fermentation to produce heat, all the raw materials cooperate with one another and are coupled with solar energy for heat collection, the temperature of plough layer soil can be rapidly increased to 50-70 DEG C, the sterilization efficiency can be improved, meanwhile, the soil nutrient content is increased, and the soil quality is improved. The method is simple to operate, free of chemical agent input, green and safe, and can effectively reduce the treatment cost.

Description

Technical Field

[0001] The present invention relates to the field of agricultural biotechnology, and particularly relates to a synergistic method for quickly creating a high-temperature sterilization environment in soil and improving soil quality. Background Art

[0002] Facility cultivation is an agronomic measure with controllable environment that artificially creates a microclimate suitable for crop growth to achieve annual balanced production of crops. With the expansion and popularization of the facility vegetable industry in China, there are relatively serious continuous cropping obstacle problems in the actual production of facility vegetables at present, manifested as soil acidification, salinization, nutrient imbalance, soil-borne diseases, etc., which have adverse effects on both soil quality and crop yield, and are bottleneck problems for the development of the facility vegetable industry.

[0003] Regarding the problem of continuous cropping obstacles in the soil of protected vegetable fields, people have adopted various soil remediation measures such as agronomic, physical, chemical, and biological methods over the decades, all of which have certain effects, but they have limitations in terms of the degree of action, treatment cost, and subsequent impacts. Agronomic remediation measures include fallowing, crop rotation, intercropping, etc., which mainly come from the experience of preventing soil-borne diseases in traditional agriculture. These measures are simple and have low costs. However, the fallowing time cycle is relatively long, and crop rotation and intercropping have little effect on soils with relatively low fertility. Therefore, the bactericidal effect is unstable, and it can only control the number of pathogenic bacteria in the short term and cannot fundamentally change the environment to solve the problem. Physical remediation measures mainly include solar disinfection, steam disinfection, and flooding disinfection methods. The solar disinfection method uses solar energy in summer to raise the soil temperature in a closed greenhouse and maintain it for a period of time to fully kill soil-borne pathogenic bacteria. The sterilization rate of the soil using solar disinfection is related to the soil temperature and treatment time: to achieve the same sterilization rate of 90%, it takes 17.9 - 33.5 days at a soil temperature of 37°C, while only 23 - 68 minutes at a soil temperature of 50°C. Root-knot nematodes are mainly distributed in the soil at a depth of 3 - 10 cm, and their lethal temperature is 55°C. Therefore, raising the soil temperature of each layer is one of the key factors for soil sterilization. Due to the complex and changeable summer climate, if only relying on the solar radiation intensity and the heat preservation ability of the greenhouse film, it is difficult for the soil to reach an ideal high-temperature environment and maintain a sufficient high-temperature sterilization time in practical applications. Moreover, as the heat dissipates downward, the temperature of the deep soil is relatively low, which is not conducive to sterilization. The steam disinfection method requires special equipment, consumes a large amount of fuel, and requires a high level of labor, so it is not suitable for large-scale promotion. Although flooding can reduce soil salinization, it is impossible to maintain a long-term flooded environment under the conditions of loose soil and low groundwater level in the north, and the created reduction intensity is insufficient to effectively kill soil-borne pathogenic bacteria. Chemical remediation measures use chemical pesticides, soil fumigants, etc. to inhibit soil-borne diseases and pests. Commonly used chemical agents include chloropicrin, methyl bromide, dimethyl disulfide, trichloronitromethane, metam-sodium, etc. Although the sterilization effect is significant, there are great potential safety hazards. The soil after sterilization is in a microbial vacuum state, which is prone to the rebound of pathogenic bacteria during the planting period. Such chemical agents also have a great destructive impact on human health, the environment, and the ozone layer. According to the Montreal Protocol on Substances that Deplete the Ozone Layer signed in 1987, the fumigation of soil with methyl bromide has been banned in various countries. Biological remediation measures are the most environmentally friendly methods, which improve the soil microbial environment by adding biocontrol bacteria such as Pseudomonas and Actinomycetes. However, biocontrol bacteria are exogenous additives to the soil and need to adapt to the environment and compete and antagonize with indigenous microorganisms. Therefore, the application cost is high, the effect is slow to appear, and the effect is unstable. Summary of the Invention

[0004] The present invention provides a synergistic method for quickly creating a high-temperature sterilization environment for soil and improving soil quality to solve problems such as poor soil temperature increase effect, high treatment cost, and complex operation during the repair process of protected vegetable fields.

[0005] The present invention provides a synergistic method for quickly creating a high-temperature soil sterilization environment and improving soil quality, including steps of material application, soil ploughing, soil moisture regulation, and high-temperature greenhouse covering; wherein, during the material application process, tail vegetable straws, crop straws, straw decomposer agents, and distiller's grains are mixed and spread on the soil surface.

[0006] The method of the present invention, during the summer greenhouse break period, maximally utilizes solar energy by covering the plastic film and closing the greenhouse film, and simultaneously comprehensively utilizes the tail vegetable straws produced in the facility vegetable field, exogenous crop straws, straw decomposer agents, and brewing waste distiller's grains for mixed fermentation to generate heat. With the synergistic effect among the raw materials, the temperature of the plough layer soil can be quickly increased to 50 - 70 °C, which is beneficial to improving the sterilization efficiency. At the same time, it can improve the soil nutrient content, is simple to operate, has no input of chemical agents, is green and safe, and can effectively reduce the treatment cost.

[0007] Further, let the organic carbon contents of the plough layer soil, tail vegetable straws, crop straws, and distiller's grains be C S 、C V 、C W 、C A (g / kg), the total nitrogen contents be N S 、N V 、N W 、N A (g / kg), and the masses be M S 、M V 、M W 、M A (t / mu); wherein, the soil bulk density is X g / cm 3 , and the ploughing depth is D cm; The mass M S of the plough layer soil = 6.67 X·D (t / mu); M V 、M M need to satisfy the following formula: .

[0008] Preferably, , more preferably, .

[0009] The dosage of the straw decomposer agent is 1 / (5000 - 10000) of the total amount of the tail vegetable straws and the crop straws.

[0010] By limiting the dosages of the tail vegetable straws, crop straws, straw decomposer agents, and distiller's grains within a reasonable range value, better synergistic effects can be exerted among the raw materials, which is more beneficial to increasing the soil temperature and sterilization efficiency.

[0011] Furthermore, the tail vegetable straw is returned to the field in full amount at (2 - 4) t / mu, the amount of crop straw used is (0.5 - 1) t / mu, the amount of straw decomposer used is (400 - 600) g / mu, and the amount of distiller's grains used is (30 - 50) kg / mu.

[0012] Furthermore, during the process of applying the materials in combination, the tail vegetable straw and crop straw are crushed into small sections of 3 - 5 cm, and after stubble cleaning, they are mixed with the straw decomposer and distiller's grains.

[0013] Furthermore, the crop straw includes one or more of wheat straw, corn straw, and rice straw.

[0014] Furthermore, the soil tillage is carried out with a tillage depth of 15 - 25 cm, and after tillage, the materials are evenly distributed in the plough layer soil body.

[0015] Furthermore, the soil moisture regulation is to irrigate the soil to 100% field water holding capacity and maintain a 1 - 2 cm clear water layer. This can enhance soil temperature conduction. It should be noted that the clear water layer refers to a shallow water layer formed on the soil surface to maintain soil moisture and prevent the soil surface from drying quickly.

[0016] Furthermore, for the high - temperature greenhouse soil steaming, close the upper and lower air vents and the entrance of the greenhouse, cover with plastic film, and steam the greenhouse for 15 - 30 d.

[0017] Preferably, the plastic film is a polyethylene film with a thickness of not less than 0.02 mm. The thickness of the plastic film has an obvious influence on the effect of high - temperature greenhouse soil steaming, and thus affects the soil temperature and soil quality. If the thickness of the plastic film is too small, its heat preservation performance is poor, and it cannot achieve the effect of quickly creating a high - temperature sterilization environment in the soil, and the soil quality improvement effect is not obvious. Preferably, the plastic film is a polyethylene film with a thickness of 0.02 mm - 0.1 mm. If the thickness of the plastic film is too large, it cannot make better use of solar energy for heat collection, and it also cannot achieve the effect of quickly creating a high - temperature sterilization environment in the soil. In some specific embodiments, the plastic film is a polyethylene film with a thickness of 0.02 mm.

[0018] Advantages of the present invention: 1. For the synergistic method of quickly creating a high - temperature sterilization environment in the soil and improving soil quality of the present invention, by comprehensively utilizing solar energy heat collection, heat generation from straw decomposition, and heat generation from distiller's grains fermentation, the temperature inside the greenhouse continuously rises during the greenhouse soil steaming period. The highest temperature, high - temperature residence time, and effective accumulated temperature of each soil layer are significantly increased, far higher than the soil temperature during the ordinary greenhouse soil steaming period.

[0019] 2. A synergistic method for quickly creating a high-temperature sterilization environment in soil and improving soil quality of the present invention creates an ideal high-temperature environment and sufficient high-temperature residence time, and has a stable and long-lasting sterilization effect; the distiller's grains are also rich in microorganisms, which can accelerate the decomposition of organic materials, improve the soil cohesion, and at the same time, ethanol is produced by the fermentation of distiller's grains at high temperature, which has a sterilization effect, and can kill deeper pests and diseases without using chemical insecticides.

[0020] 3. A synergistic method for quickly creating a high-temperature sterilization environment in soil and improving soil quality of the present invention also has a significant effect on improving the overall soil quality. Compared with other material application schemes, the soil pH and ammonium nitrogen content increase, while the EC and nitrate nitrogen content decrease, and it has a good improvement effect on soil acidification and salinization. Specific embodiments

[0021] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without making creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0022] Example 1 This example provides a method for quickly creating a high-temperature sterilization environment in soil. This example is carried out in a solar greenhouse in Beijing, and specifically includes the following steps: 1. Material application: After the previous vegetable crop is harvested, remove items such as field plastic film, hanging vine ropes, drip irrigation tapes, etc. from the field, and pull out the plants. Cut the tail vegetable straws (organic carbon 203.51 g / kg, total nitrogen 20.13 g / kg) and wheat straws (organic carbon 382.78 g / kg, total nitrogen 6.29 g / kg) into small sections of 3-5 cm with a pulverizer, and stubble. Mix the pulverized straws with straw decomposer (any commercially available straw accelerating decomposer in the art can be used, such as the straw decomposer used in the embodiments of the present invention, which is purchased from Zhengzhou Haowangnong Biotechnology Co., Ltd.) and distiller's grains, and evenly spread them on the soil surface. The tail vegetable straws are returned to the field at a full amount of 3 t / acre, the wheat straw dosage is 0.75 t / acre, the straw decomposer dosage is 500 g / acre, and the distiller's grains (organic carbon 35.67 g / kg, total nitrogen 2.73 g / kg) dosage is 40 kg / acre, C / N = 10.0.

[0023] 2. Soil tillage: Use a rotary tiller to till to 20 cm, and after tillage, the materials are evenly distributed in the plough layer soil body.

[0024] 3. Soil moisture regulation: Temperature sensors (RS-*-NO1-TR-3) are buried in the soil to collect the temperatures of soil layers at different depths of 0-10 cm, 10-20 cm, and 20-30 cm in real time. Water is applied until the soil reaches its maximum field water holding capacity and a 1-2 cm water layer is maintained.

[0025] 4. High-temperature soil steaming: Close the upper and lower air vents and entrances and exits of the greenhouse, cover with plastic film, and seal the greenhouse for 28 days. The plastic film is a 0.02 mm polyethylene film.

[0026] 5. Online temperature monitoring: Continuously monitor the temperature of the plough layer soil during the monitoring period.

[0027] Comparative Example 1: The difference between Comparative Example 1 and Example 1 is only that: no materials are added during the material application process. The specific operation is as follows: Without adding any materials, directly conduct soil tillage, moisture regulation, and high-temperature soil steaming, and monitor the temperature of the plough layer soil during this period.

[0028] Comparative Example 2: The difference between Comparative Example 2 and Example 1 is only that: only tail vegetable straws are used in the material application. The specific operation is as follows: The tail vegetable straws (organic carbon 203.51 g / kg, total nitrogen 20.13 g / kg) are crushed and returned to the field at a full amount of 3 t / mu. The remaining operations are the same as those in Example 1.

[0029] Comparative Example 3: The difference between Comparative Example 3 and Example 1 is only that: the material application is a mixture of tail vegetable straws and sheep manure organic fertilizer. The specific operation is as follows: The crushed tail vegetable straws (organic carbon 203.51 g / kg, total nitrogen 20.13 g / kg) are mixed with sheep manure (organic carbon 111.81 g / kg, total nitrogen 6.75 g / kg) and evenly spread on the soil surface. The tail vegetable straws are returned to the field at a full amount of 3 t / mu, and the amount of sheep manure used is 0.5 t / mu. The remaining operations are the same as those in Example 1.

[0030] Comparative Example 4: The difference between Comparative Example 4 and Example 1 is only that: the material application is a mixture of tail vegetable straws and wheat straws. The specific operation is as follows: The tail vegetable straws (organic carbon 203.51 g / kg, total nitrogen 20.13 g / kg) and wheat straws (organic carbon 382.78 g / kg, total nitrogen 6.29 g / kg) are crushed and evenly spread on the soil surface. The tail vegetable straws are returned to the field at a full amount of 3 t / mu, and the amount of wheat straws used is 0.75 t / mu. The remaining operations are the same as those in Example 1.

[0031] Comparative Example 5: The difference between Comparative Example 5 and Example 1 is only that: the material preparation is tail vegetable straw, wheat straw and calcium cyanamide. The specific method is as follows: Crush the tail vegetable straw (organic carbon 203.51 g / kg, total nitrogen 20.13 g / kg) and wheat straw (organic carbon 382.78 g / kg, total nitrogen 6.29 g / kg), mix them with calcium cyanamide, and evenly spread them on the soil surface. The tail vegetable straw is returned to the field in full amount at 3 t / mu, the wheat straw dosage is 0.75 t / mu, and the calcium cyanamide dosage is 60 kg / mu. The remaining operations are the same as those in Example 1.

[0032] Comparative Example 6: The difference between Comparative Example 6 and Example 1 is only that: the material preparation is tail vegetable straw, wheat straw and straw decomposer. The specific method is as follows: Crush the tail vegetable straw (organic carbon 203.51 g / kg, total nitrogen 20.13 g / kg) and wheat straw (organic carbon 382.78 g / kg, total nitrogen 6.29 g / kg), mix them with the straw decomposer, and evenly spread them on the soil surface. The tail vegetable straw is returned to the field in full amount at 3 t / mu, the wheat straw dosage is 0.75 t / mu, and the straw decomposer dosage is 500 g / mu. The remaining operations are the same as those in Example 1.

[0033] Comparative Example 7: The difference between Comparative Example 7 and Example 1 is only that: the application amounts of tail vegetable straw and wheat straw are different during the material preparation process. The specific method is as follows: Crush the tail vegetable straw (organic carbon 203.51 g / kg, total nitrogen 20.13 g / kg) and wheat straw (organic carbon 382.78 g / kg, total nitrogen 6.29 g / kg), mix them with the straw decomposer and distiller's grains, and evenly spread them on the soil surface. The tail vegetable straw is returned to the field in full amount at 3 t / mu, the wheat straw dosage is 0.1 t / mu, the distiller's grains is 40 kg / mu, C / N = 9.5, and the remaining operations are the same as those in Example 1.

[0034] Comparative Example 8: The difference between Comparative Example 8 and Example 1 is only that: during the soil ploughing process, the ploughing depth is different. The specific method is as follows: Use a rotary tiller to deeply plough to 40 cm, and the remaining operations are the same as those in Example 1.

[0035] Comparative Example 9: The difference between Comparative Example 9 and Example 1 is only that: during the soil moisture regulation process, the irrigation amount is different. The specific method is as follows: Irrigate the soil to 70% of the field water holding capacity, and the remaining operations are the same as those in Example 1.

[0036] The soil temperature conditions in Example 1 and Comparative Examples 1 - 7 are shown in Table 1.

[0037] Table 1 Influence of material application and dosage on soil temperature increase effect

[0038] Note: The effective accumulated temperature (℃) above 55℃ at 0-10 cm refers to the sum of the parts where the soil temperature at 0-10 cm exceeds 55℃ per hour, with 55℃ as the reference temperature. For example, if the soil temperature at 0-10 cm is 60℃ at 10:00 am on a certain day, the effective accumulated temperature at this time is 60℃ - 55℃ = 5℃.

[0039] As can be seen from Table 1, the method for synergistically creating a high-temperature soil sterilization environment and improving soil quality with the blended materials of tail vegetable straw + wheat straw + straw decomposer + distiller's grains has a 9.4 - 23.3℃, 9.7 - 18.3℃, and 3.9 - 10.5℃ higher maximum soil temperature at 0-10 cm, 10-20 cm, and 20-30 cm during the soil covering period than those without adding organic materials, with the materials of tail vegetable straw, tail vegetable straw + sheep manure organic fertilizer, tail vegetable straw + wheat straw, tail vegetable straw + wheat straw + calcium cyanamide, and tail vegetable straw + wheat straw + straw decomposer, respectively, and the increase rates are 14.8% - 46.98%, 18.58% - 41.97%, and 8.41% - 26.38%. Except that the effective accumulated temperature and high-temperature duration are both 0 for those without adding organic materials and with the material of tail vegetable straw, the method for synergistically creating a high-temperature soil sterilization environment and improving soil quality with the blended materials of tail vegetable straw + wheat straw + straw decomposer + distiller's grains has a 74% - 566% higher effective accumulated temperature above 55℃ and a 52% - 2380% longer high-temperature duration than those of other materials. The above conclusions indicate that the combined application of materials plays an important role in increasing soil temperature. Among various combined application methods of materials, the combination of tail vegetable straw + wheat straw + straw decomposer + distiller's grains is the most effective in rapidly increasing soil temperature, creating high-temperature conditions, and prolonging the high-temperature residence and sterilization time. In addition, in the high-temperature soil sterilization with the combined application of materials of tail vegetable straw + wheat straw + straw decomposer + distiller's grains, the maximum soil temperature of each layer with C / N = 10.0 (Example 1, wheat straw 0.75 t / mu) is 4.36% - 7.65% higher than that with C / N = 9.5 (Comparative Example 6, wheat straw 0.1 t / mu), the effective accumulated temperature above 55℃ is increased by 47%, and the high-temperature duration is increased by 21%, indicating that within the range of wheat straw application amount provided by the present invention, the soil temperature increase and preservation effect is the best.

[0040] Table 2 Influence of Agronomic Measures on Soil Temperature Increase Effect

[0041] As can be seen from Table 2, under the same material application and dosage, the method of tillage depth of 20 cm / irrigation water amount of 100% WHC increased the maximum soil temperature by 7.52% - 10.31% compared with the method of tillage depth of 40 cm / irrigation water amount of 100% WHC, the effective accumulated temperature above 55 °C increased by 53.45%, and the high-temperature duration increased by 36.26%; compared with the tillage depth of 20 cm / irrigation water amount of 70% WHC, the maximum soil temperature increased by 17.01% - 22.09%, the effective accumulated temperature above 55 °C increased by 288.66%, and the high-temperature duration increased by 85.07%. It shows that the agronomic measures provided by the present invention are most conducive to creating a high-temperature sterilization environment for the soil.

[0042] Table 3 Effects of Material Application on Soil Properties

[0043] As can be seen from Table 3, the method of blending materials of tail vegetable straw + wheat straw + straw decomposer + distiller's grains has an obvious effect on improving soil performance: in terms of improving soil acidification and salinization, compared with the untreated group, the pH and NH4 + -N increased by 11.29% and 3859.68% respectively, and the electrical conductivity and NO3 - -N decreased by 39.02% and 98.21% respectively, and the effects were significantly better than those of other material ratios (Comparative Examples 1 - 7). It can be seen that the method provided by the present invention has a good improvement effect on soil acidification and salinization.

[0044] Table 4 Effects of Agronomic Measures on Soil Properties

[0045] As can be seen from Table 4, under the same material application and dosage, the method of tillage depth of 20 cm / irrigation water amount of 100% WHC is more conducive to improving soil quality than the methods of tillage depth of 40 cm / irrigation water amount of 100% WHC and tillage depth of 20 cm / irrigation water amount of 70% WHC. In terms of improving soil acidification and salinization, the increase in pH increased by 4.72% and 5.91% respectively, and the increase in NH4 + -N increased by 1415.59% and 627.96% respectively, and the decrease in NO3 - -N increased by 2.21% and 3.79% respectively. It can be seen that under this agronomic measure, the method of the present invention can effectively improve soil acidification and salinization.

[0046] Table 5 Effects of Material Application on the Number of Fusarium oxysporum in Soil

[0047] As can be seen from Table 5, the method of blending materials as tail vegetable straw + wheat straw + straw decomposer + distiller's grains has a stronger bactericidal effect than other treatment methods, and the killing rate of Fusarium oxysporum can be increased by up to 10.16% (Comparative Examples 1-7). It can be seen that the method of applying materials provided by the present invention has a good sterilization effect.

[0048] Table 6 Effects of Agronomic Measures on the Number of Fusarium oxysporum in Soil

[0049] As can be seen from Table 6, under the same material application and dosage, the method of plowing depth of 20 cm / irrigation amount of 100% WHC is more conducive to soil sterilization than the methods of plowing depth of 40 cm / irrigation amount of 100% WHC and plowing depth of 20 cm / irrigation amount of 70% WHC, and the killing rates of Fusarium oxysporum are increased by 10.32% and 7.54% respectively. It can be seen that under these agronomic measures, the method of the present invention can effectively kill common soil-borne pathogens.

[0050] From the above examples and comparative examples, it can be concluded that the method of the present invention can effectively increase the maximum temperature, high-temperature residence time and effective accumulated temperature of the soil at each depth during the soil steaming period, ensure a stable sterilization effect; and can also effectively reduce the risks of acidification and secondary salinization.

[0051] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing examples, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing examples, or perform equivalent replacements for some 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 various examples of the present invention.

Claims

1. A collaborative method for quickly creating a soil high temperature sterilization environment and improving soil quality, characterized in that: The method comprises the steps of material application, soil tillage, soil moisture control and high temperature greenhouse; wherein, during the material application process, vegetable straw, crop straw, straw composting agent and distiller's grains are mixed and then spread on the soil surface.

2. The method according to claim 1, characterized in that Assume that the organic carbon contents of plough layer soil, vegetable straw, crop straw, and distiller's grains are C S , C V , C W , C A , organic carbon content is g / kg, total nitrogen content is N S 、N V 、N W 、N A The unit of total nitrogen content is g / kg, and the masses are M S 、M V 、M W 、M A , the unit of mass is t / mu; Where, soil bulk density is X g / cm 3 , tillage depth is D cm; Soil quality of topsoil layer M S =6.67 X·D ; M V 、M M The following formula must be satisfied: 。 3. The method according to claim 1 or 2, characterized in that: The dosage of the straw composting agent is 1 / (5000-10000) of the total amount of the vegetable straw and the crop straw.

4. The method according to any one of claims 1 to 3, characterized in that: The vegetable straw is returned to the field in full at (2-4) t / mu, the crop straw usage is (0.5-1) t / mu, the straw composting agent usage is (400-600) g / mu, and the distiller's grains usage is (30-50) kg / mu.

5. The method according to claim 1, characterized in that During the material application process, the vegetable straw and crop straw are crushed into small pieces of 3-5 cm, and are mixed with the straw composting agent and distiller's grains after the stubble is removed.

6. The method according to any one of claims 1 to 5, characterized in that: The crop straw includes one or more of wheat straw, corn straw and rice straw.

7. The method according to claim 1, characterized in that The soil plowing depth is 15-25 cm, and after plowing, the materials are evenly distributed in the tillage layer soil.

8. The method according to claim 1, characterized in that The soil moisture control is to irrigate the soil to 100% of the field water holding capacity and maintain a 1-2 cm open water layer.

9. The method according to claim 1, characterized in that: The high temperature stuffy greenhouse is to close the upper and lower air vents and the entrance of the greenhouse, cover the ground film, and stuff the greenhouse for 15-30 days.

10. The method according to claim 9, characterized in that The ground film is a polyethylene film with a thickness of not less than 0.02 mm.

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