Deep soil greenhouse closing method based on intermittent sterilization

Abstract

The invention discloses a deep soil greenhouse closing method based on intermittent sterilization. The method comprises the following steps: (1) cleaning a greenhouse; (2) soil preparation; (3) irrigation; 4, ridging, wherein deep ridges are dug in the soil in the long edge direction of the greenhouse; (5) arranging a hot air circulation pipe system: arranging an air supply hole pipe in the direction perpendicular to the deep ridge, wherein the air supply hole pipe is connected with an air blower through a hot air pipe; (6) film covering; (7) closing the greenhouse, namely performing intermittent sterilization treatment on deep soil in the later period of closing the greenhouse, specifically, according to weather forecast, selecting a time period when continuous cloudy and sunny days exist and the highest temperature exceeds 35 DEG C, starting an air blower for 1 hour at 13-14 o'clock every day, and conveying extremely hot air at the upper part in the greenhouse into furrows; starting an air blower for 1 hour at 2-4 o'clock in the morning of the next day to cool the soil, and starting the air blower again for 1 hour at 13-14 o'clock in the noon of the current day to blow hot air into the furrows; repeating the operation until the last day of greenhouse closing, and not performing the blowing operation after noon blowing is completed on the last day of greenhouse closing; and (8) opening a shed.

Description

Technical Field

[0001] The invention relates to the technical field of facility agricultural production, and in particular to a deep soil sealing method based on intermittent sterilization. Background Art

[0002] There are many reasons for the occurrence of continuous cropping problems in facility agriculture production, the main reason of which comes from the soil, involving soil nutrient imbalance, changes in soil pH and physical properties, changes in soil microbial population distribution and diversity, soil-borne diseases and accumulation of self-toxic substances. At present, in the actual facility agriculture production process, soil disinfection is a key technical means to solve the problem of continuous cropping in solar greenhouse soil. This method is low-cost, simple to operate, and has obvious effects. Among the various existing facility agriculture soil disinfection methods, high temperature greenhouse is one of the most common methods.

[0003] The greenhouse is sealed with plastic film during the greenhouse rest period, so that the air temperature in the greenhouse is quickly raised to 60-70℃ and maintained for a certain period of time to kill the pathogens, insect eggs and weeds in the soil. At present, the common greenhouse sealing operation mainly includes the following steps:

[0004] Step 1: Clean the shed: clean up the debris in the shed, check and repair the damaged parts of the shed film, and keep the shed film intact;

[0005] Step 2, land preparation: After the garden is cleared, use a rotary tiller to prepare the land; in order to avoid crushing the residual roots, especially the diseased residual roots remaining in the shallow soil layer from the previous crop, so that the diseased soil blocks originally concentrated near the residual roots are evenly dispersed to the entire soil layer, generally a shallow soil layer turning method such as rotary tillage is adopted, and at the same time, the diseased residual roots in the shallow soil layer are avoided from being brought into the deep soil layer, which leads to a rapid recurrence of the disease after the greenhouse is closed. However, rotary tillage can only improve the shallow soil structure. Long-term application of rotary tillage will cause soil compaction, which is not conducive to the deep rooting of crop roots and affects crop growth;

[0006] Step 3, watering and sealing the greenhouse: After the land preparation is completed, water the greenhouse, thoroughly irrigate the soil layer, close the greenhouse, and seal the greenhouse for 15 to 25 days; when watering, a large amount of water is required, flooding, and thoroughly irrigating the soil layer. The irrigation amount is usually 400 to 500 m 3 / mu (if the soil is sandy loam, water needs to be added once in the middle to keep the soil moist and facilitate disinfection), which is beneficial to the three functions of increasing soil temperature during the closed greenhouse period, forming an oxygen-deficient environment in the soil, and bringing soil salt to the deep soil layer to reduce the salt content on the soil surface; during the closed greenhouse period, a high-humidity and high-temperature environment is formed in the greenhouse, so that the temperature 10 cm below the soil surface is above 70°C and the ground temperature 20 cm is above 45°C, which has the effect of sterilization and insecticide; if the temperature 10 cm below the soil surface does not reach above 70°C, the ground film can be covered to help increase the ground temperature and achieve the effect of closed greenhouse;

[0007] Step 6, open the greenhouse: roll up the greenhouse side film and skylight, fully air the greenhouse, and let the soil temperature return to normal; after the airing is completed, apply EM probiotic solution and potassium humate to the soil, and plow the soil to restore its vitality.

[0008] The principle of the above-mentioned greenhouse technology is that the soil in the greenhouse relies on temperature increase during the greenhouse period to kill pests and diseases in the soil, where the soil temperature increase is due to the heat exchange between the high-temperature air and the soil enclosed in the greenhouse in summer and the sunlight radiation through the greenhouse film. However, in actual greenhouse operation, since the surface temperature of the soil in the greenhouse can only rise to about 80°C, it is often the case that the temperature 10cm below the soil surface does not reach 70°C and the ground temperature 20cm below the soil surface does not reach 45°C, and the duration of the suitable temperature is greatly affected by the weather, resulting in insufficient disinfection of the deep soil. Insufficient deep soil disinfection makes it impossible to deep plow the soil in the greenhouse, so that the crop varieties that can be selected in the greenhouse are limited to shallow-rooted varieties, and deep-rooted crops are difficult to plant; in addition, the inability to deep plow will result in the inability to effectively improve the physical and chemical properties of the soil, which is not conducive to crop planting and growth.

[0009] To sum up, the main limiting factor for using the greenhouse sealing method to disinfect the soil is the maximum temperature that the soil can reach and the duration of high temperature during the sealing period; in addition, the increase in soil temperature mainly depends on the heat exchange and thermal radiation between the air in the greenhouse and the ground surface, which has a low heating efficiency and a shallow depth of heated soil.

[0010] In order to ensure deep soil disinfection, lime nitrogen is currently applied to the soil for soil disinfection. Lime nitrogen refers to a fertilizer made by mixing lime and urea. However, this method of applying lime nitrogen to the soil has a lot of problems, including: ① The presence of lime nitrogen itself is prone to ammonia volatilization, which causes the loss of nitrogen fertilizer; ② The high amount of sulfur contained in lime nitrogen increases soil acidity; ③ When applying, personnel must take corresponding protective measures; ④ There must be a long drying time after application. If the lime reaction is not complete, it may cause problems such as seedling burning in the later stage; ⑤ From the perspective of high-temperature soil disinfection: The main principle of lime nitrogen heating the soil is the chemical energy generated by quicklime and water in the soil. The disinfection of the soil mainly relies on the temperature increase generated by chemical energy in the soil. This temperature increase has the problem of short duration, fast heating and fast cooling, and cannot completely disinfect the soil.

[0011] Among the sterilization methods in the medical field, there are reports on the intermittent sterilization method at room temperature. The intermittent sterilization method at room temperature is suitable for preparations or medicines that must be sterilized by heat but are not resistant to higher temperatures. The specific operation is: heat the preparations or medicines to be sterilized at 60-80°C for 1 hour to kill the bacterial propagules therein, and then place them at room temperature or incubator for 24 hours to allow the spores therein to develop into propagules, and then heat them again until they are eliminated; repeat the heating and placement operations more than three times until all spores are eliminated. The temperature used in this intermittent sterilization method at room temperature is 60-80°C, which coincides with the temperature to which the soil can be raised in the greenhouse technology; however, there are no reports of using temperature alternation for intermittent sterilization in the current greenhouse technology, and there are no effective measures for implementing temperature alternation. Summary of the invention

[0012] The purpose of the present invention is to provide a deep soil sterilization method based on intermittent sterilization to solve the problem that the existing sterilization technology is insufficient for deep soil sterilization.

[0013] To achieve the above objectives, the present invention adopts the following technical solutions.

[0014] A deep soil shed method based on intermittent sterilization comprises the following steps:

[0015] (1) Cleaning the greenhouse: clean up the debris in the greenhouse, check and repair the damaged parts of the greenhouse film, and keep the greenhouse film intact;

[0016] (2) Land preparation: deep tillage is used to prepare the land and loosen the soil;

[0017] (3) Watering: Water the greenhouse until the soil is fully moistened;

[0018] (4) Ridge making: Use a small trenching machine to dig deep ridges along the long side of the greenhouse;

[0019] (5) Setting up a hot air circulation pipe system: placing an air supply hole pipe perpendicular to the direction of the deep ridge, that is, the air supply hole pipe is perpendicular to the direction of the ridge and flush with its upper surface; the air supply hole pipe is closed at one end and the other end is a hot air inlet, and an air supply hole is provided on the pipe; the air supply hole faces downward to the bottom of the ridge ditch, and the hot air inlet is connected to the blower through the hot air pipe;

[0020] (6) Film covering: Covering the furrows and air delivery tubes with a plastic film, wherein the plastic film is pierced with air holes;

[0021] (7) Stifling greenhouse: The greenhouse is sealed and sealed; deep soil is sterilized intermittently in the later stage of the greenhouse sealing;

[0022] The method for intermittent sterilization of deep soil is as follows: in the late stage of the greenhouse, according to the weather forecast, a period of continuous cloudless sunny days with a maximum temperature exceeding 35°C is selected, and the blower is turned on for 1 hour at 13:00 to 14:00 every day, and the extremely hot air in the upper part of the greenhouse is transported to the furrow by the blower, and the soil temperature of 10 to 15 cm on both sides of the furrow and the furrow bottom is quickly raised to 70°C, and the heating time is about 1 hour, and the temperature holding time can last for about 3 hours; at 2 to 4 o'clock in the morning of the next day, the blower is turned on for 1 hour to cool the soil, so that the soil temperature drops to about 30 to 40°C at 3 to 5 o'clock in the morning, and the blower is turned on again for 1 hour at 13:00 to 14:00 at noon on the same day to blow hot air into the furrow; the above operation is repeated until the last day of the greenhouse, and the blowing operation is no longer performed after the noon blowing is completed on the last day of the greenhouse;

[0023] (8) Opening the greenhouse: After the greenhouse is sealed, roll up the greenhouse side film and skylight, fully air the greenhouse, and let the soil cool down to normal temperature. During the air-drying period, do not remove the film on the ridges. After the air-drying period is over, remove the film and dismantle the hot air circulation pipe system.

[0024] In order to solve the problem that the maximum temperature and high temperature duration of deep soil in the existing greenhouse technology are difficult to achieve the ideal disinfection effect during implementation, the present invention adopts the "intermittent sterilization method" to increase the temperature of deep soil by pre-opening deep ridges and setting up a hot air circulation pipe system to achieve the effect of deep soil disinfection. The specific principles of the present invention are:

[0025] In the late stage of the greenhouse, the present invention uses a hot air circulation pipe system, in conjunction with solar radiation at 13 to 14 o'clock and high temperature weather, to transport extremely hot air from the upper part of the greenhouse to the furrows; and because the furrows are deep and narrow, the hot air has a larger contact surface with the soil in the furrows, and the heat exchange efficiency is high. At the same time, the hot air blown into the furrows through the air holes opened on the film maintains a positive pressure in the furrows. Under the action of the two phases, the soil temperature of 10 to 15 cm on both sides of the furrows and the bottom can be quickly raised to 70°C, which is equivalent to the deep soil temperature in the greenhouse reaching 70°C. Thus, the pathogens and their spores are killed; and at 2 to 4 a.m. the next day (the air temperature in the greenhouse is relatively low during this period), that is, after about 12 hours, the blower is turned on to reduce the soil temperature to about 30 to 40°C at 3 to 5 a.m., so that a large number of pathogen spores germinate and quickly develop into pathogens, which is conducive to being killed by heating up the next day; and at 13 to 14 a.m. on the same day, hot air is blown into the furrow to quickly kill the newly developed pathogens and prevent the pathogens from continuously producing spores; after repeated heating-cooling processes, the pathogens in the soil are completely killed. The present invention achieves effective disinfection and sterilization of shallow and deep soils through the above treatment, avoiding rapid recurrence of diseases after the end of the stuffy greenhouse.

[0026] Furthermore, the present invention adopts deep tillage in the preparation of land before the shed, so that the soil plough layer is loose and soft, with good structure, thick active soil layer, flat and fertile, and the proportion of solid phase, liquid phase and gas phase in the plough layer is coordinated with each other, which is more suitable for various crops, especially the growth and development requirements of deep-rooted crops, and avoids the negative impact of rotary tillage in the existing shed technology; at the same time, in the process of deep tillage, organic matter such as decomposed organic fertilizer and cut and broken straw can be mixed and applied to the soil as base fertilizer. At the same time, the present invention adopts a hot air circulation pipe system to solve the problem of heating dead corners or residual areas caused by deep tillage as mentioned above, and ensures effective disinfection of the soil.

[0027] Preferably, in step (4), deep ridges are excavated, the ridge furrows are 60 to 70 cm deep, the ridge furrows are 25 to 30 cm wide at the top and 15 to 20 cm wide at the bottom, and the field ridges are 40 to 50 cm wide.

[0028] Preferably, in step (5), air holes are opened on the air hole tube at intervals of half the sum of the ridge width and the field ridge width, the diameter of the air holes is 5 cm, and they face downwards towards the bottom of the ridge.

[0029] Preferably, in step (5), an air supply hole tube is installed every 10 to 15 m in a direction perpendicular to the deep ridge; the air supply hole tube is a PVC tube with a diameter of 10 cm, and the length of the tube is adapted to the width of the soil and the width of the short side of the greenhouse, that is, it is smaller than the width of the short side of the greenhouse and larger than the width of the soil, so that it can cover the soil along the short side of the greenhouse.

[0030] Preferably, in step (5), a blower is fixedly mounted on a scaffold above each air supply hole pipe and 1 to 1.2 m below the roof, and its switch is set outside the shed. The hot air pipe is a hose, and when connecting the blower and the air supply air pipe, it is necessary to ensure that the turning point of the hose body is an arc turn without any angle.

[0031] Preferably, in step (6), one air hole with a diameter of 2 to 3 cm is pierced on the film above each furrow between every two air hole tubes.

[0032] Preferably, in step (7), the period of continuous cloudless sunny days with a maximum temperature exceeding 35°C is ≥5 days; that is, in the late stage of the greenhouse, the number of consecutive days for deep soil intermittent sterilization treatment is ≥5 days. Preferably, the late stage of the greenhouse refers to two weeks or more after the start of the greenhouse treatment, that is, after the greenhouse is sealed, the greenhouse is sealed in a conventional manner for two weeks or even longer, and then the deep soil intermittent sterilization treatment is started; the entire greenhouse treatment time of step (7) is the same as the conventional greenhouse technology, specifically 4 to 6 weeks.

[0033] Furthermore, in step (8), after the drying shed is finished, the film is uncovered, the hot air circulation pipe system is removed, and then EM probiotic stock solution and potassium humate are applied to each acre of land on the same day; about 3 to 4 days after the application of the probiotics, choose a cool evening, spray the EM probiotic stock solution evenly on the soil surface again, and then plough the surface to restore the vitality of the soil.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] Compared with the existing greenhouse sealing technology, the greenhouse sealing method of the present invention only needs to convert the original shallow tillage and rough tillage into deep tillage and fine tillage during the land preparation process, and a simple hot air circulation pipe is set in the greenhouse, so that the shallow and deep layers of the soil can be disinfected synchronously and efficiently, and the soil structure can be improved more effectively, so that the greenhouse soil can be allowed to be deep ridged or planted with deep-rooted crops after the greenhouse is sealed, and the planting variety flexibility is better, resulting in higher economic benefits. The method of the present invention is adopted to efficiently disinfect the deep soil, supplemented by the return of organic base fertilizer to the field and the comprehensive utilization of biological fertilizer, so as to maintain the fertility and vitality of the soil, avoid the obstacle of continuous cropping of the soil, use less medicine and less fertilizer in the agricultural production process, and is a very ecological agricultural facility disinfection operation mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of deep ridges in the greenhouse;

[0037] Figure 2 It is a cross-sectional schematic diagram of the hot air circulation pipe system.

[0038] Figure 3 Schematic diagram of the plane layout of the air supply hole tube. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0040] Example 1

[0041] During July to August, the deep soil shed method based on intermittent sterilization of the present invention is used to disinfect and sterilize the soil of facility agriculture, which specifically includes the following steps:

[0042] (1) Greenhouse cleaning: clean up the roots and leaves left over from the previous crop, and remove the planting equipment (drip irrigation lines, tension lines, covering films, floor tiles, etc.) and farming tools from the greenhouse; check and repair damaged parts of the greenhouse film to keep the greenhouse film intact.

[0043] (2) Land preparation: Use deep tillage machinery to prepare the land and loosen the soil; adopt slow and fine turning during deep tillage to give full play to the advantages of deep tillage to make the soil plow layer loose and soft, with good structure, thick active soil layer, flat and fertile, so as to coordinate the proportions of solid, liquid and gas phases in the plow layer, which is more suitable for the growth and development requirements of various crops, especially deep-rooted crops; at the same time, during the tillage process, organic matter such as decomposed organic fertilizer, cut and crushed straw, etc. can be mixed into the soil as base fertilizer.

[0044] (3) Irrigation: Irrigate the greenhouse until the soil is fully moistened. Flooding is not required.

[0045] If the soil in the greenhouse has a high salinity, flood it with water first, then initially close the greenhouse for 3 to 7 days, and wait until the water in the 50 cm soil layer on the soil surface and the salt it carries settle into the deeper soil layer before sealing the greenhouse according to the method of the present invention.

[0046] (4) Ridge opening: Use a small trenching machine to dig deep ridges along the long side of the greenhouse. The depth of ridge 1 is 60-70 cm, the width of the top of ridge 1 is 25-30 cm, the width of the bottom is 15-20 cm, and the width of ridge 2 is 40-50 cm. Figure 1 shown.

[0047] (5) Figure 2 and 3 As shown, a hot air circulation pipe system is provided: an air supply hole pipe 3 is installed at intervals of 10 to 15 m perpendicular to the direction of the deep ridges. Specifically, the air supply hole pipe is perpendicular to the direction of the ridges and flush with their upper surfaces.

[0048] The air supply hole pipe 3 is a PVC pipe with a diameter of 10 cm, and the pipe length is less than the short side width of the greenhouse by about 1 m but greater than the soil width; one end of the air supply hole pipe 3 is closed, and the other end is a hot air inlet;

[0049] Air holes 4 are provided on the air hole tube 3 at intervals of half the sum of the ridge width and the field ridge width. In the present embodiment, an air hole 4 is provided every 27.5 to 30 cm, so that each ridge corresponds to an air hole; and the air hole 4 has a diameter of 5 cm and faces downwardly to the bottom of the ridge 1.

[0050] A small blower 5 is fixedly mounted on the scaffold above each air delivery hole pipe 3 and about 1m below the roof, with its power cord suspended and the switch set outside the shed;

[0051] The air supply hole pipe 3 is connected to the air outlet of the small blower 5 through the hot air supply pipe 6; the hot air pipe 6 is a hose, and after connection, it is necessary to ensure that the turning point of the hose body is an arc turn without any angle.

[0052] (6) Film covering: Cover the ridges and air-perforated tubes with a plastic film, and then punch an air hole in the film above each ridge between every two air-perforated tubes (i.e., a row of air holes is formed in the film above each ridge). The diameter of the air hole is 2 to 3 cm.

[0053] (7) Close the greenhouse: Hang the skirt film and seal the greenhouse. If the greenhouse is damaged, the holes need to be repaired to ensure that it is airtight. In the later stage of sealing the greenhouse, intermittent sterilization of the deep soil is carried out;

[0054] The specific intermittent sterilization treatment of deep soil is as follows:

[0055] After the greenhouse is sealed, it is sealed for more than 2 weeks according to the normal method. Then, in the later stage of the greenhouse sealing, according to the weather forecast, a period of continuous cloudless sunny days with a maximum temperature exceeding 35°C (lasting for more than 5 days) is selected, and a small blower is turned on for 1 hour at 13:00-14:00 every day; the small blower transports the extremely hot air in the upper part of the greenhouse to the furrow. Since the furrow is deep and narrow, the hot air has a larger contact surface with the soil in the furrow, and the heat exchange efficiency is high. At the same time, the air holes opened on the film are small. The hot air blown into the furrow by the small blower maintains a positive pressure in the furrow. Under the action of two phases, the soil temperature of 10-15cm on both sides of the furrow and the bottom can be quickly raised to 70°C, and this temperature can last for about 3 hours;

[0056] At 2 to 4 a.m. the next day, turn on a small blower for 1 hour to cool the soil, so that the soil temperature drops to around 30 to 40°C at 3 to 5 a.m. Under this condition, a large number of pathogen spores will quickly develop into pathogens; turn on the small blower again between 13:00 and 14:00 on the same day to blow hot air into the ridges to quickly kill the newly developed pathogens. While killing the pathogens, it prevents the pathogens from continuing to produce spores.

[0057] Repeat the above operation until the last day of the greenhouse, and no more blowing operation will be performed after the blowing is completed from 13:00 to 14:00 on the same day.

[0058] If the maximum temperature of the external environment on a certain day does not reach 35°C during the intermittent sterilization treatment of the deep soil, a period of continuous cloudless sunny days with a maximum temperature exceeding 35°C should be selected again to carry out the intermittent sterilization treatment of the deep soil again.

[0059] (9) Opening the greenhouse: After the greenhouse is sealed (specifically, after the air blowing stops, preferably after the air blowing stops and the temperature is maintained for 3 hours), roll up the greenhouse edge film and skylight, and fully air the greenhouse to allow the soil to cool to room temperature. During the air-drying period, do not uncover the film above the furrows. The greenhouse is air-dried for 10 days;

[0060] After the drying shed is finished, uncover the film, dismantle the hot air circulation pipe system, and then apply 5-6 kg of EM probiotics stock solution + 10-12 kg of potassium humate per mu of land on the same day (add 1000 kg of water and spray evenly on the soil surface); about three days after applying the probiotics, choose a cool evening, spray the EM probiotics stock solution evenly on the soil surface again, and then plough the surface to revitalize the soil and restore it to fertile "living soil";

[0061] At this point, the entire greenhouse sterilization process is completed, and you can start planting according to ordinary planting techniques.

Claims

1. A deep soil shed method based on intermittent sterilization, characterized in that: The following steps are involved: (1) Cleaning the greenhouse: clean up the debris in the greenhouse, check and repair the damaged parts of the greenhouse film, and keep the greenhouse film intact; (2) Land preparation: deep tillage is used to prepare the land and loosen the soil; (3) Watering: Water the greenhouse until the soil is fully moistened; (4) Ridge making: Use a small trenching machine to dig deep ridges along the long side of the greenhouse; (5) Setting up a hot air circulation pipe system: placing an air supply hole pipe perpendicular to the direction of the deep ridge, that is, the air supply hole pipe is perpendicular to the direction of the ridge and flush with its upper surface; the air supply hole pipe is closed at one end and the other end is a hot air inlet, and an air supply hole is provided on the pipe; the air supply hole faces downward to the bottom of the ridge ditch, and the hot air inlet is connected to the blower through the hot air pipe; (6) Film covering: Covering the furrows and air delivery tubes with a plastic film, wherein the plastic film is pierced with air holes; (7) Stifling greenhouse: The greenhouse is sealed and sealed; deep soil is sterilized intermittently in the later stage of the greenhouse sealing; The method for intermittent sterilization of deep soil is as follows: in the late stage of the greenhouse, according to the weather forecast, a period of continuous cloudless sunny days with a maximum temperature exceeding 35° C. is selected, and the blower is turned on for 1 hour at 13:00 to 14:00 every day, and the extremely hot air in the upper part of the greenhouse is transported to the furrow by the blower, and the soil temperature on both sides of the furrow and at the bottom of the furrow is quickly raised to 70° C.; at 2:00 to 4:00 in the morning of the next day, the blower is turned on for 1 hour to cool the soil, and at 13:00 to 14:00 noon on the same day, the blower is turned on again for 1 hour to blow hot air into the furrow; the above operation is repeated until the last day of the greenhouse, and the blowing operation is no longer performed after the noon blowing is completed on the last day of the greenhouse; (8) Opening the greenhouse: After the greenhouse is sealed, roll up the greenhouse side film and skylight, fully air the greenhouse, and let the soil cool down to normal temperature. During the air-drying period, do not remove the film on the ridges. After the air-drying period is over, remove the film and dismantle the hot air circulation pipe system.

2. The deep soil shed method based on intermittent sterilization according to claim 1 is characterized in that: In step (7), the period of continuous cloudless sunny days with a maximum temperature exceeding 35° C. is ≥ 5 days; the late stage of the greenhouse sealing process refers to two weeks or more after the start of the greenhouse sealing process.

3. The deep soil shed method based on intermittent sterilization according to claim 2 is characterized in that: In step (4), deep ridges are excavated, wherein the ridge furrows are 60 to 70 cm deep, the ridge furrows are 25 to 30 cm wide at the top and 15 to 20 cm wide at the bottom, and the field ridges are 40 to 50 cm wide.

4. The deep soil shed method based on intermittent sterilization according to claim 3 is characterized in that: In step (5), an air supply hole tube is installed every 10 to 15 m in a direction perpendicular to the deep ridge. The air supply hole tube is a PVC tube with a diameter of 10 cm, and the length of the tube is less than the short side width of the greenhouse and greater than the soil width. Air supply holes are opened on the air supply hole tube at intervals of half the sum of the ridge width and the field ridge width. The air supply holes have a diameter of 5 cm and face downward to the bottom of the ridge.

5. The deep soil shed method based on intermittent sterilization according to claim 4 is characterized in that: In step (5), a suspended blower is fixed on a scaffold above each air supply hole pipe and 1 to 1.2 m below the roof, and its switch is set outside the shed.

6. The deep soil shed method based on intermittent sterilization according to claim 5 is characterized in that: In step (6), a ventilation hole with a diameter of 2 to 3 cm is pierced on the film above each furrow between every two air supply hole tubes.

7. The deep soil shed method based on intermittent sterilization according to claim 6 is characterized in that: In step (8), after the drying shed is finished, the film is uncovered, the hot air circulation pipe system is removed, and then EM probiotic stock solution and potassium humate are applied to each acre of land on the same day; 3 to 4 days after the application of probiotics, select a cool evening, apply EM probiotic stock solution on the soil surface again, and then plough the surface.

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