Planting method of rainwater utilization of slope field soil

Abstract

The application discloses a kind of slope field soil rainwater utilization planting method, it is characterized in that, after autumn harvest, the soil deep position of field soil is set to obstruct layer and cut off water infiltration, while the soil surface is set to obstruct layer with water permeable function and cut off water evaporation, so that it can collect and save rainwater to the second year spring planting.The application has the characteristics of better collecting, storing and utilizing rainwater planting, and is particularly suitable for application in plateau slope, especially in loess high slope field soil, to improve agricultural yield.

Description

Technical Field

[0001] This invention relates to the field of land farming technology, specifically to a method for utilizing rainwater in sloping farmland. Background Technology

[0002] The high-altitude slopes of my country, especially the Loess Plateau, are prone to drought and water shortages due to the high permeability of loess soil and the transpiration caused by long-term exposure to wind and sun. This makes vegetation survival difficult and agriculture extremely challenging. Farmers in the Loess Plateau region still largely rely on rainfall. In years with abundant or evenly distributed rainfall, crops receive timely water throughout their growth cycle, resulting in good harvests. However, in years with uneven rainfall or drought, crops in the Loess Plateau region often suffer from poor yields.

[0003] In fact, some areas of the Loess Plateau receive relatively high annual rainfall, reaching 400-500 mm. Such abundant rainfall would typically result in lush vegetation and good crop growth in rocky mountainous areas or non-loessland regions. However, on the Loess Plateau, this often translates to a lack of lush landscapes and bountiful harvests. Instead, the reality is often severe drought, with barren hills and ridges appearing nine out of ten years later. This leads to low grain yields even for farmers with large tracts of farmland. The reasons for this include the difficulty in retaining rainwater and the fact that the majority of rainfall occurs after the autumn harvest and before spring sowing. Consequently, despite the relatively high average annual rainfall, the land is severely arid, making it difficult to guarantee a good harvest.

[0004] CN201810725622.9 previously disclosed a dryland rainwater harvesting system, which includes planting soil on which plants are evenly distributed. A water storage layer is located within the planting soil, below the plant roots. Rainwater collection devices are arranged on the planting soil and connected to the water storage layer via drainage pipes. This invention can collect rainwater using the rainwater collection devices to supply water to the water storage layer for plant absorption, better meeting the crop's water requirements. However, it still suffers from drawbacks such as low rainwater harvesting efficiency, complex system structure, and high cost.

[0005] Therefore, how to better utilize rainwater for planting, taking into account the characteristics of highland sloping fields, has become a problem that needs to be considered and solved by those skilled in the art. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is: how to provide a rainwater utilization planting method for sloping fields that can better utilize rainwater, making it particularly suitable for application in plateau slopes, especially in Loess Plateau fields.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A method for utilizing rainwater in sloping farmland is characterized by setting up an obstruction layer in the deep soil layer after the autumn harvest to prevent water infiltration, and setting up a permeable obstruction layer on the soil surface to prevent water evaporation, so that rainwater can be collected and stored for planting in the spring of the following year.

[0009] In this way, the soil itself can collect and retain rainwater that falls after the autumn harvest for planting in the following spring, which better avoids rainwater loss through soil infiltration. It is especially suitable for use on plateau slopes, especially in Loess Plateau fields, to increase crop yield.

[0010] Furthermore, this method relies on a rainwater interception system for high-altitude sloping farmland. The high-altitude sloping farmland rainwater interception system includes a lower film laid horizontally at a depth of 0.5-1.5 meters below the surface of the farmland. The lower film has an upward-folded edge around its perimeter. It also includes an upper film laid on top of the surface of the farmland. The upper film has several recessed positions with openings for water permeability in the recessed positions. Both the upper and lower films are impermeable films.

[0011] In this way, rainwater can collect in the depressions of the upper film after it falls and infiltrate downwards, then be intercepted and stored in the soil by the lower film. Simultaneously, the upper film can block and prevent water evaporation through sunlight. Therefore, this rainwater interception system is suitable for planting on high-altitude slopes, intercepting rainwater after the autumn harvest for spring planting the following year. During spring planting, plants can also be planted directly by breaking through the upper film at the planting location, allowing the system to remain effective throughout the plant's growth cycle, maximizing rainwater utilization and increasing plant yield.

[0012] Furthermore, the lower film is positioned 1 meter below the soil surface. Too deep a depth would result in higher construction costs and make it difficult for the stored water to be absorbed and utilized by the plants above during planting; too shallow a depth would lead to poor water retention and make the film more susceptible to damage from shallow soil organisms.

[0013] Furthermore, the upward height of the folded edge is 10-30 cm. If it is too low, the stored water will easily flow away from the edge of the folded edge, resulting in poor water storage. If it is too high, it will disrupt the integrity of the contact between the field soil and the surrounding soil, which is not conducive to the conduction of microorganisms in the soil and can easily cause landslides on the field slope.

[0014] Furthermore, an insect-repellent coating is applied to the upper and / or lower surfaces of the lower film.

[0015] This prevents small animals such as earthworms, mole crickets, crickets, and even field mice from gnawing on and damaging the film, causing leaks and extending the lifespan of the lower film.

[0016] Furthermore, the insect-repellent coating is made of traditional Chinese medicine with insect-repellent effects.

[0017] In this way, pests are effectively repelled while being harmless to the plants, making it safer. Specifically, the herbal powders of herbs such as Veratrum nigrum, Melia toosendan, Ophiopogon japonicus, and castor bean can be mixed with pregelatinized starch and then mixed with room temperature water to form a paste. This paste is then brushed onto both sides of the lower film to prevent earthworms, grubs, mole crickets, cutworms, and other insects from biting and damaging the film, creating holes and losing its water-retaining function. This method provides a good pest-repelling effect, adheres firmly to the lower film, and has a longer-lasting pest-repelling effect, extending the lifespan of the lower film.

[0018] Furthermore, a layer of hydrophobic or waterproof material is also provided around the soil from the outside of the folded edge upwards to the surface of the soil.

[0019] This effectively prevents water trapped by the lower film from leaking out through the folded edges due to soil capillary action, greatly improving the water storage and retention effect of the lower film.

[0020] Furthermore, the hydrophobic or waterproof material layer is a lime-soil waterproof layer.

[0021] Lime-soil is an existing formulation material composed of lime, clay, and / or sand, as well as water. A lime-soil waterproof layer offers excellent waterproofing and breathability, effectively preventing water loss while simultaneously connecting the soil to the outside, maintaining aeration (to meet plant growth needs) and preventing landslides. Specifically, it can be prepared by uniformly mixing 15% slaked lime and 85% loess by weight.

[0022] Furthermore, the thickness of the lime-soil waterproof layer should be 1-5cm, preferably around 3cm. Too thin a layer will compromise effectiveness, while too thick a layer will hinder construction.

[0023] Furthermore, the outer edge of the field is reinforced with compacted soil ridges, the top of which extends 10-30 cm above the surface of the soil. This helps to better retain water in the field and effectively prevents landslides.

[0024] Furthermore, the outer side of the field ridge is designed as a slope. This can better prevent slope collapse.

[0025] Furthermore, the slope angle on the outer side of the field ridge is less than 70 degrees. This can better prevent slope collapse.

[0026] Furthermore, the upper part of the ridge should be wider than 50cm. This can better prevent slope collapse.

[0027] Therefore, this invention targets the terraced farming areas of the Loess Plateau, which currently lack any irrigation measures. It employs a system of engineering techniques to retain rainfall during the rainy season at a certain depth (100cm) within the topsoil, maintaining a high moisture content in the surface layer of the terraced soil. Simultaneously, measures are taken to reduce evaporation losses from the soil surface. When planting in the following spring, with favorable soil moisture, the planted crops will have sufficient moisture to support their growth and development. Even in the event of prolonged drought without effective rainfall, crop yields will not be significantly affected.

[0028] Furthermore, the aforementioned rainwater interception system for high-altitude sloping farmland is obtained through the following construction steps:

[0029] After completing the preparatory work before excavation, cut a waterproof plastic film as the lower layer, based on the overall shape obtained by extending 10-30cm outward from the perimeter of the field. Apply an insect-repellent coating made from traditional Chinese medicine to both the upper and lower surfaces of the lower layer, and then roll it up along the length of the field. Next, cut a waterproof plastic film as the upper layer, based on the overall shape obtained by extending 5-10cm outward from the perimeter of the field (to facilitate setting several recessed positions on it after the upper layer is laid), and then roll it up along the length of the field.

[0030] b. Excavate the topsoil, first digging out the top 20-30cm of soil from the field and piling it on the remaining land outside the field.

[0031] c. To construct field ridges, soil from below the topsoil is taken and compacted to raise the outer edge of the field soil to form ridges. The top of the ridges is expected to be 10-30cm higher than the top surface of the field soil.

[0032] d. Conduct the first half of the field soil construction. Following the length of the field, excavate half of the soil along the field ridges and inner walls to the required depth (preferably 1m deep, including the topsoil). The excavation direction is opposite to the direction of the lower film roll-up. The excavated soil is piled on top of the other half of the field soil. The lower surface of the excavated soil is leveled. Then, a portion of the excavated soil is mixed with (15% by weight) quicklime to create lime-soil. A layer of lime-soil is then applied to the side walls of the excavated field ridges and the inner walls of the field soil. Form a lime-soil waterproof layer; unfold the prepared lower layer of film along the surface of the excavated field soil in the direction of excavation, leaving a 10-30cm gap at the edge of the unfolded part to form an upward folded edge along the field ridge and the inner wall of the field soil. Leave the ununfolded lower layer of film roll at the center line of the field soil and cover it for protection (a stiffer felt or other object can be used for covering and protection, as a marker and to effectively prevent the lower layer of film roll from being damaged when the other half of the field soil is excavated); backfill the excavated first half of the field soil onto the laid lower layer of film.

[0033] e. For the second half of the field soil construction, excavate the second half of the field soil along the field ridge and the inner wall of the field soil to the required depth (preferably excavated to a depth of 1m together with the topsoil). The excavated soil is piled on top of the other half of the field soil. The lower surface of the excavated field soil is leveled, and a layer of lime-soil is placed on the excavated field ridge sidewall and the inner wall of the field soil to form a lime-soil waterproof layer. The lower film that has been laid to the center line is unfolded along the lower surface of the excavated field soil, leaving a 10-30cm gap at the edge to form a folded edge that runs upward along the field ridge and the inner wall of the field soil. The excavated second half of the field soil is backfilled onto the laid lower film.

[0034] f. Backfill the topsoil and lay the upper film. Evenly set downward depressions on the laid upper film, and break the surface film at the center of the depression to make a water-permeable opening. Secure the upper film with soil or heavy objects around its perimeter.

[0035] In this way, the above construction method can conveniently obtain a rainwater interception system for terraced fields on loess slopes, while preserving the topsoil with high nutrient content for planting. Construction can be carried out after the autumn harvest, effectively changing the situation in the Loess Plateau terraced farming areas with an annual rainfall of 400-500 mm where the rainfall period is not synchronized with the crop growing season. This has prevented crops in these areas from effectively utilizing the rainfall, resulting in a long-term low level of agricultural productivity, and improving the planting effect and land use efficiency of the loess slopes.

[0036] Furthermore, in step d, after the excavation of the first half of the field is completed, a row of vertical baffles is set at the center line of the excavated field. After the lower film is laid to the position of the baffles, it is gradually unfolded upwards along the baffles during the backfilling process until the backfilling is completed. In step e, during the construction of the second half of the field, the field is gradually excavated along the other end to the position of the baffles. After the excavation is completed, the baffles are removed, and the unfolding and laying of the lower film for the second half begins. This allows for a smoother completion of the protection and laying connection process of the lower film.

[0037] This invention has the following characteristics: 1. By setting up a waterproof layer around the terraced fields and laying a seepage-proof lower film at a certain depth below the ground surface, water that has seeped into the soil can be retained at a certain depth (100cm) for a relatively long time. 2. The upper film laid on the surface of the terraced fields effectively prevents the water stored in the soil from being lost due to evaporation. 3. During the crop growth and development period, the water collected and stored in the soil during the rainy season is absorbed and utilized by the crops, supporting normal crop production. Even in drought conditions, it can meet the normal growth and development needs of the crops, ensuring a certain yield. This method of rainwater storage, regulation, and utilization completely changes the past situation of lack of water security in agricultural production on loess slopes.

[0038] In summary, this invention has the advantage of better collecting, storing and utilizing rainwater for planting, and is particularly suitable for application on plateau slopes, especially in loess plateau fields, to increase crop yields. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of a rainwater interception system for highland slope farmland in a specific embodiment of the present invention.

[0040] Figure 2 yes Figure 1 This diagram illustrates the excavation of the topsoil during the system's construction. The arrows in the diagram indicate the direction of movement.

[0041] Figure 3 yes Figure 1 This is a schematic diagram showing the excavation of the first half of the field during the system construction.

[0042] Figure 4 yes Figure 1 This diagram illustrates the system after the lower layer of film has been laid in the first half of the field during construction.

[0043] Figure 5 yes Figure 1 This is a schematic diagram of the system after all the lower film has been laid and the field soil has been backfilled, but the topsoil has not yet been backfilled.

[0044] Figure 6 yes Figure 1This is a schematic diagram of the system after the topsoil has been backfilled but before the upper film has been laid. Detailed Implementation

[0045] The present invention will now be described in further detail with reference to specific embodiments.

[0046] Implementation method: A method for utilizing rainwater in sloping farmland, characterized in that after the autumn harvest, a barrier layer is set in the deep soil layer to prevent water infiltration, while a permeable barrier layer is set in the surface soil layer to prevent water evaporation, so that rainwater can be collected and stored for planting in the spring of the following year.

[0047] In this way, the soil itself can collect and retain rainwater that falls after the autumn harvest for planting in the following spring, which better avoids rainwater loss through soil infiltration. It is especially suitable for use on plateau slopes, especially in Loess Plateau fields, to increase crop yield.

[0048] Specifically, this method relies on a rainwater interception system for high-altitude sloping farmland. (See [link to relevant documentation]). Figure 1 The system includes a lower film 1 laid horizontally at a depth of 0.5-1.5 meters below the soil surface, with an upward-folded edge 2 around its perimeter. It also includes an upper film 3 laid on top of the soil surface, with several recessed positions 4 containing openings for water permeability. Both the upper film 3 and the lower film 1 are impermeable films. In the figure, number 7 represents the topsoil.

[0049] In this way, rainwater can collect in the depressions of the upper film after it falls and infiltrate downwards, then be intercepted and stored in the soil by the lower film. Simultaneously, the upper film can block and prevent water evaporation through sunlight. Therefore, this rainwater interception system is suitable for planting on high-altitude slopes, intercepting rainwater after the autumn harvest for spring planting the following year. During spring planting, plants can also be planted directly by breaking through the upper film at the planting location, allowing the system to remain effective throughout the plant's growth cycle, maximizing rainwater utilization and increasing plant yield.

[0050] In this embodiment, a lower film 1 is used to form a barrier layer at the deep soil level, and an upper film 3 is used to form a barrier layer at the soil surface, which has the advantages of low cost and ease of implementation. In other possible embodiments, other structural forms can also be used to form the upper and lower barrier layers, such as using a cement concrete structure to form a barrier layer at the deep soil level, or using a one-way permeable membrane to form a barrier layer at the soil surface.

[0051] In this embodiment, the lower film 1 is located 1 meter below the surface of the soil. If the film is too deep, construction costs will be high and the stored water will be difficult for the plants above to absorb and utilize during planting; if it is too shallow, the water retention effect will be poor and the film will be easily destroyed by organisms in the shallow soil layer.

[0052] The upward height of the folded edge 2 is 10-30 cm. If it is too low, the stored water will easily flow away from the edge of the folded edge, resulting in poor water storage. If it is too high, it will cut off the integrity of the contact between the field soil and the surrounding soil, which is not conducive to the conduction of microorganisms in the soil and will easily cause landslides on the field slope.

[0053] The lower film 1 has an insect-repellent coating applied to its upper and / or lower surfaces.

[0054] This prevents small animals such as earthworms, mole crickets, crickets, and even field mice from gnawing on and damaging the film, causing leaks and extending the lifespan of the lower film.

[0055] The insect-repellent coating is made of traditional Chinese medicine with insect-repellent effects.

[0056] In this way, pests are effectively repelled while being harmless to the plants, making it safer. Specifically, the herbal powders of herbs such as Veratrum nigrum, Melia toosendan, Ophiopogon japonicus, and castor bean can be mixed with pregelatinized starch and then mixed with room temperature water to form a paste. This paste is then brushed onto both sides of the lower film to prevent earthworms, grubs, mole crickets, cutworms, and other insects from biting and damaging the film, creating holes and losing its water-retaining function. This method provides a good pest-repelling effect, adheres firmly to the lower film, and has a longer-lasting pest-repelling effect, extending the lifespan of the lower film.

[0057] Among them, a layer of hydrophobic or waterproof material is set around the field soil from the outside of the folded edge upwards to the surface of the field soil.

[0058] This effectively prevents water trapped by the lower film from leaking out through the folded edges due to soil capillary action, greatly improving the water storage and retention effect of the lower film.

[0059] The hydrophobic or waterproof material layer 5 is a lime-soil waterproof layer.

[0060] Lime-soil is an existing formulation material composed of lime, clay, and / or sand, as well as water. A lime-soil waterproof layer offers excellent waterproofing and breathability, effectively preventing water loss while simultaneously connecting the soil to the outside, maintaining aeration (to meet plant growth needs) and preventing landslides. Specifically, it can be prepared by uniformly mixing 15% slaked lime and 85% loess by weight.

[0061] The thickness of the lime-soil waterproof layer is 1-5cm, with approximately 3cm being the preferred thickness. A layer that is too thin will not guarantee effectiveness, while a layer that is too thick will hinder construction.

[0062] In addition, a field ridge 6, made of compacted soil, is set up along the outer edge of the field. The top of the ridge 6 is about 10-30cm higher than the surface of the field soil. This can better maintain the water retention capacity of the field soil and effectively prevent landslides.

[0063] The outer side of the 6th ridge is designed as a slope. This helps to better prevent slope collapse.

[0064] Among them, the slope angle on the outer side of field ridge 6 is less than 70 degrees. This can better prevent slope collapse.

[0065] Among them, the upper width of the 6th ridge is greater than 50cm. This can better prevent slope collapse.

[0066] Therefore, this invention targets the terraced farming areas of the Loess Plateau, which currently lack any irrigation measures. It employs a system of engineering techniques to retain rainfall during the rainy season at a certain depth (100cm) within the topsoil, maintaining a high moisture content in the surface layer of the terraced soil. Simultaneously, measures are taken to reduce evaporation losses from the soil surface. When planting in the following spring, with favorable soil moisture, the planted crops will have sufficient moisture to support their growth and development. Even in the event of prolonged drought without effective rainfall, crop yields will not be significantly affected.

[0067] The rainwater interception system for high-altitude sloping farmland is obtained through the following construction steps:

[0068] After completing the preparatory work before excavation, cut a waterproof plastic film as the lower layer, based on the overall shape obtained by extending 10-30cm outward from the perimeter of the field. Apply an insect-repellent coating made from traditional Chinese medicine to both the upper and lower surfaces of the lower layer, and then roll it up along the length of the field. Next, cut a waterproof plastic film as the upper layer, based on the overall shape obtained by extending 5-10cm outward from the perimeter of the field (to facilitate setting several recessed positions on it after the upper layer is laid), and then roll it up along the length of the field.

[0069] b. Excavate the topsoil, first removing the top 20-30cm of soil and piling it on the remaining land outside the field; see [link / reference]. Figure 2 and Figure 3 ;

[0070] c. To construct field ridges, soil from below the topsoil is taken and compacted to raise the outer edge of the field soil to form ridges. The top of the ridges is expected to be 10-30cm higher than the top surface of the field soil.

[0071] d. Conduct the first half of the field soil construction, see [link / reference] Figure 3 and Figure 4 First, dig half of the field along its length, excavating downwards along the field ridges and inner walls to the required depth (preferably 1m deep, including the topsoil). The excavation direction is opposite to the direction of the lower film roll-up. The excavated soil is piled on top of the other half of the field. The lower surface of the excavated field is leveled. Then, a portion of the excavated soil is mixed with 15% quicklime to make lime-soil. A layer of lime-soil is then applied to the side walls of the excavated field ridges and the inner walls of the field to form a lime-soil waterproof layer. Layer; Unroll the prepared lower layer of film along the surface of the excavated soil in the direction of excavation, leaving a 10-30cm gap at the edge of the rolled-up portion to form an upward fold along the field ridge and inner wall of the soil. Leave the unrolled lower layer of film roll at the center line of the soil and cover it for protection (a stiff felt or other object can be used for covering and protection, as a marker and to effectively prevent the lower layer of film roll from being damaged when the other half of the soil is excavated); Backfill the excavated first half of the soil onto the laid lower layer of film.

[0072] e. For the second half of the field construction, excavate the second half of the field soil along the field ridges and inner walls to the required depth (preferably 1m depth including the topsoil). Pile the excavated soil on top of the other half of the field soil. Level the excavated surface of the field soil. Apply a layer of lime-soil to the excavated field ridge and inner walls to form a lime-soil waterproof layer. Unfold the lower film, already laid to the centerline, along the excavated surface of the field soil, leaving a 10-30cm margin at the edge to form a folded edge along the field ridge and inner walls. Backfill the excavated second half of the field soil onto the laid lower film. (See [reference]) Figure 5 ;

[0073] f. Perform topsoil backfilling (see...) Figure 6 And lay the upper film (see) Figure 1 On the laid upper film, evenly set downward depressions, and break the surface film at the center of the depression to create a water-permeable opening. Use soil or heavy objects to press down around the upper film to complete the fixation.

[0074] In this way, the above construction method can conveniently obtain a rainwater interception system for terraced fields on loess slopes, while preserving the topsoil with high nutrient content for planting. Construction can be carried out after the autumn harvest, effectively changing the situation in the Loess Plateau terraced farming areas with an annual rainfall of 400-500 mm where the rainfall period is not synchronized with the crop growing season. This has prevented crops in these areas from effectively utilizing the rainfall, resulting in a long-term low level of agricultural productivity, and improving the planting effect and land use efficiency of the loess slopes.

[0075] In step d, after the first half of the field soil is excavated, a row of vertical baffles is set at the center line of the excavated soil. After the lower film is laid to the baffles, it is gradually unfolded upwards along the baffles during the backfilling process until the backfilling is completed. In step e, during the construction of the second half of the field soil, it is gradually excavated along the other end of the field soil to the baffles. After the excavation is completed, the baffles are removed, and the unfolding and laying of the lower film for the second half begins. This allows for a smoother process of protecting and connecting the lower film.

[0076] This invention has the following characteristics: 1. By setting up a waterproof layer around the terraced fields and laying a seepage-proof lower film at a certain depth below the ground surface, water that has seeped into the soil can be retained at a certain depth (100cm) for a relatively long time. 2. The upper film laid on the surface of the terraced fields effectively prevents the water stored in the soil from being lost due to evaporation. 3. During the crop growth and development period, the water collected and stored in the soil during the rainy season is absorbed and utilized by the crops, supporting normal crop production. Even in drought conditions, it can meet the normal growth and development needs of the crops, ensuring a certain yield. This method of rainwater storage, regulation, and utilization completely changes the past situation of lack of water security in agricultural production on loess slopes.

Claims

1. A method for planting on a slope using rainwater from a field, characterized by, After autumn harvest, the water infiltration is blocked by the barrier layer at the deep position of the field soil, and the water evaporation is blocked by the barrier layer with water permeability function at the surface of the field soil, so that the rainwater can be collected and stored for spring planting next year; The method is realized by a highland slope field soil rainwater interception system, the highland slope field soil rainwater interception system comprises a lower film horizontally laid at a depth position of 0.5-1.5 meters below the surface of the field soil, the lower film has a folding edge folded upward at the periphery, and further comprises an upper film laid above the surface of the field soil, the upper film is provided with a plurality of recessed positions, and the recessed positions are provided with openings for water permeability, and the upper film and the lower film are both impermeable films; the upper surface and / or the lower surface of the lower film is coated with a layer of insect repellent coating; the insect repellent coating adopts a traditional Chinese medicine coating with insect repellent effect; A layer of hydrophobic or waterproof material is further arranged on the outside of the folding edge upward to the surface of the field soil; The hydrophobic or waterproof material layer is a lime soil waterproof layer, and the thickness of the lime soil waterproof layer is 1-5 cm; The highland slope field soil rainwater interception system is obtained by the following construction steps: a complete excavation preparation work, cut a piece of impermeable plastic film as the lower film according to the shape of the field soil extending outward by 10-30 cm, coat a layer of insect repellent coating made of insect repellent traditional Chinese medicine on the upper surface and the lower surface of the lower film, and then roll up according to the length direction of the field soil; then cut a piece of impermeable plastic film as the upper film according to the shape of the field soil extending outward by 5-10 cm, and then roll up according to the length direction of the field soil; b perform surface soil excavation, first dig out 20-30 cm of soil on the surface of the field soil and pile it on the empty land outside the field soil; c process the ridge, take the soil below the surface of the field soil to compact and raise the edge position outside the field soil to form a ridge, and the upper end of the ridge is higher than the upper surface of the field soil by a distance of about 10-30 cm; d perform the construction of the first half of the field soil, first dig out the required depth of the field soil along the ridge and the inner side wall of the field soil, the digging direction is opposite to the rolling direction of the lower film, and the dug soil is piled on the other half of the field soil; the lower surface of the excavated field soil is leveled, then part of the excavated field soil is mixed with lime to obtain lime soil, and a layer of lime soil is arranged on the excavated ridge side wall and the inner side wall of the field soil to form a lime soil waterproof layer; the rolled lower film is unfolded along the lower surface of the excavated field soil in the digging direction and a distance of 10-30 cm is left at the edge of the unfolded part to form a folding edge upward along the ridge and the inner side wall of the field soil, and the unfolded lower film is rolled and left in the center line position of the field soil and covered for protection; the excavated first half of the field soil is backfilled to the laid lower film; eThe second half of the field soil is excavated to the required depth along the ridge and the inner side wall of the field soil, and the excavated soil is piled on the other half of the field soil; the lower surface of the excavated field soil is leveled, and a layer of lime soil is arranged on the excavated ridge side wall and the inner side wall of the field soil to form a lime soil waterproof layer; the lower layer of film that has been laid to the center line position is unfolded along the lower surface of the excavated field soil and a distance of 10-30 cm is left at the edge to form a folded edge upward along the ridge and the inner side wall of the field soil; the excavated soil of the second half of the field soil is backfilled to the laid lower layer of film; fThe surface layer soil is backfilled and the upper layer of film is laid, the upper layer of film is uniformly arranged with downward recessed positions, and the surface layer of film is broken at the center of the recessed position to form a water-permeable opening, and the upper layer of film is fixed by using mud or heavy objects around the position.

2. The slope field soil rainwater utilization planting method according to claim 1, wherein The lower layer of film is 1 meter deep from the surface of the field soil.

3. The slope field soil rainwater utilization planting method according to claim 1, wherein The height of the folded edge upward is 10-30 cm.

4. The slope field soil rainwater utilization planting method according to claim 1, wherein The outer side edge of the field soil is also provided with a ridge obtained by soil compaction, and the upper end of the ridge is about 10-30 cm higher than the upper surface of the field soil; The outer side of the ridge is provided with a slope; the angle of the outer side slope of the ridge is less than 70; and the width of the upper end of the ridge is greater than 50 cm.

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