Slope field soil rainwater utilization planting method

Abstract

The invention discloses a slope field soil rainwater utilization planting method, which is characterized in that after autumn harvest, a barrier layer is arranged at a soil deep layer position of field soil to prevent water flow from infiltrating, and meanwhile, a barrier layer with a water permeable function is arranged on a soil surface layer to prevent water evaporation, so that rainwater can be collected and stored until spring sowing and planting in the next year. The device has the advantages that rainwater can be better collected, stored and utilized for planting, and the device is particularly suitable for being applied to plateau sloping fields, especially loess high-slope field soil, so that the farming yield is increased.

Description

Technical Field

[0001] The invention relates to the technical field of land farming, and in particular to a planting method utilizing rainwater from sloping fields. Background Art

[0002] my country's plateau slopes, especially those in the Loess Plateau, are prone to drought and water shortages due to the high permeability caused by the large pores of loess and the transpiration of the slopes under long-term exposure to wind and sun. It is difficult for vegetation to survive and it is even more difficult to plant crops on the land. Most of the farmers in my country's Loess Plateau still rely on the weather for their crops. In years with abundant or even rainfall, crops will receive timely rainfall throughout the growth cycle, and farmers will get a good harvest. If the rainfall is uneven or dry, it will be difficult for crops in the Loess Plateau to have a good harvest.

[0003] In fact, some areas of the Loess Plateau have a relatively high annual rainfall of 400 to 500 mm. With so much rainfall, vegetation is lush and crops grow well in rocky mountainous areas or non-loess areas, but it is difficult to have a good scene of beautiful mountains and clear waters and bumper harvests in the Loess Plateau. It is more of a reality that nine out of ten years are dry and bare, resulting in very low grain output even if farmers have a large amount of farmland. The reason is that in addition to the difficulty of rainwater to stay, a large amount of rainfall occurs after the autumn harvest and before the spring sowing. Therefore, although the average annual rainfall is not low, the land is actually severely dry and it is difficult to guarantee the harvest.

[0004] CN201810725622.9 once disclosed a dryland rainwater enrichment system, which includes planting soil, on which plants are evenly arranged, a water storage layer is arranged in the planting soil, and the water storage layer is located below the root system of the plants, and a rainwater collection device is arranged on the planting soil, and the rainwater collection device is connected to the water storage layer through a drainage pipe. The invention can rely on the rainwater collection device to collect rainwater to supply water to the water storage layer for plant absorption, so as to better meet the water requirements of crops. However, there are still defects such as low rainwater collection and utilization efficiency, complex device system structure, and high cost.

[0005] Therefore, how to better utilize rainwater for planting based on the characteristics of plateau sloping fields has become a problem that needs to be considered and solved by technical personnel in this field. Summary of the invention

[0006] In view of the above-mentioned deficiencies in 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 for planting, making it particularly suitable for application in plateau slopes, especially loess high slope fields.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions: A method for utilizing rainwater from sloping fields for planting, characterized in that after the autumn harvest, a barrier layer is set deep in the soil of the field to block water from seeping in, and a barrier layer with a water-permeable function is set on the soil surface to block water evaporation, so that rainwater can be collected and stored until spring planting in the following year.

[0008] In this way, this method enables the field soil itself to collect and preserve the rainwater that falls after the autumn harvest until the spring sowing of the following year, better preventing the rainwater from seeping downward through the soil and being lost. It is particularly suitable for application in plateau slopes, especially in loess high slope fields, to increase crop yields.

[0009] Furthermore, the method is implemented by a plateau sloping field rainwater interception system, which includes a lower film horizontally laid at a depth of 0.5-1.5 meters below the surface of the field, and the lower film has a folded edge folded upward around it. It also includes an upper film laid above the surface of the field, and the upper film is provided with a plurality of recessed positions, and the recessed positions are provided with openings for water permeability. The upper film and the lower film are both impermeable films.

[0010] In this way, after rain falls, it can gather in the concave position of the upper film and seep down, and then be intercepted by the lower film and stored in the soil. At the same time, the upper film can isolate and hinder the evaporation of water in the sun. Therefore, this rainwater interception system is used for planting on plateau slopes. It can intercept rainwater after the autumn harvest and wait for spring sowing in the next year. During spring sowing, plants can also be planted directly at the planting position by breaking through the upper film, so that the system can also maintain its function during the plant growth cycle, maximizing the utilization effect of rainwater and increasing plant yield.

[0011] Furthermore, the lower film is 1 meter below the soil surface. If it is too deep, the construction cost will be high and the stored water will be difficult to be absorbed and utilized by the plants above during planting. If it is too shallow, the water storage effect will be poor and it will be easily destroyed by shallow soil organisms.

[0012] Furthermore, the folded edge has an upward height of 10-30 cm. If it is too low, the stored water will easily leak out from the folded edge, resulting in poor water storage effect, while if it is too high, the integrity of the field soil and the surrounding soil will be cut off, which is not conducive to the conduction of microorganisms in the soil and easily causes landslides on the field slope.

[0013] Furthermore, an insect repellent coating is applied on the upper surface and / or the lower surface of the lower film.

[0014] In this way, small animals such as earthworms, mole crickets, crickets and even voles can be prevented from gnawing and damaging the film and causing leakage, thus extending the service life of the lower film.

[0015] Furthermore, the insect repellent coating adopts a traditional Chinese medicine coating with insect repellent effect.

[0016] In this way, the insect repellent effect is achieved while being harmless to the planted plants and safer. In specific implementation, Chinese medicine can be made of powders of Chinese herbs such as Veratrum, Toosendan, Thunder Balls, and Castor Communis, mixed with pre-gelatinized starch, and then added to normal temperature water to form a paste, which is then applied to both sides of the lower film to prevent earthworms, grubs, mole crickets, cutworms and other organisms from biting and damaging the bottom film, forming holes and losing the water retention function. This has a better insect repellent effect, and is easy to adhere firmly to the lower film, so the insect repellent effect lasts longer and extends the service life of the lower film.

[0017] Furthermore, a layer of hydrophobic or waterproof material is provided around the soil, located outside the folded edge and extending upward to the surface of the soil.

[0018] In this way, the water intercepted by the lower film can be effectively prevented from flowing upward over the folded edge due to the capillary phenomenon of the soil, thereby greatly improving the water storage and retention effect of the lower film.

[0019] Furthermore, the hydrophobic or waterproof material layer is a lime soil waterproof layer.

[0020] Lime soil is an existing formula material made of lime, clay and / or sand and water. The lime soil waterproof layer has excellent waterproof and air permeability, which can well prevent water from leaking out, and at the same time can well connect the inside and outside of the field soil, maintain air permeability (for plant growth needs), and prevent soil landslides. In specific implementation, it can be made by evenly mixing 15% slaked lime and 85% loess in a mass ratio.

[0021] Furthermore, the thickness of the lime soil waterproof layer is 1-5 cm, preferably about 3 cm. If it is too thin, it is difficult to ensure the effect, and if it is too thick, it is inconvenient to construct.

[0022] Furthermore, a ridge formed by compacting the soil is arranged on the outer edge of the field, and the upper end of the ridge is about 10-30 cm higher than the upper surface of the field, so as to better maintain the water storage effect of the field and prevent landslides.

[0023] Furthermore, the outer side of the ridge is set as a slope, which can better prevent the slope from collapsing.

[0024] Furthermore, the slope angle of the outer side of the ridge is less than 70 degrees, which can better prevent the slope from collapsing.

[0025] Furthermore, the width of the upper end of the ridge is greater than 50 cm, which can better prevent the slope from collapsing.

[0026] Therefore, the present invention adopts a certain engineering and technical measures system for the terraced farming areas of the Loess Plateau, which currently have no irrigation measures, to preserve the precipitation in the rainy season in these areas within a certain depth (100cm) above the cultivated soil, so that the surface layer of the terraced soil maintains a high moisture content, and measures are also taken to reduce the evaporation loss on the soil surface. When the soil moisture is better during the spring sowing next year, the planted crops will have a better soil moisture content to support their growth and development. At this time, even if there is no effective rainfall and the weather continues to be dry, the crop yield will not be greatly affected.

[0027] Furthermore, the plateau slope soil rainwater interception system is obtained by the following construction steps: a. Complete the preparatory work before excavation, cut a waterproof plastic film as the lower film according to the shape obtained by extending 10-30cm outward from the periphery of the field, apply a layer of insect repellent coating made from insect repellent Chinese medicine on the upper and lower surfaces of the lower film, and then wrap it in the length direction of the field; then cut a waterproof plastic film as the upper film according to the shape obtained by extending 5-10cm outward from the periphery of the field (to facilitate setting several concave positions on the upper film after it is laid), and then wrap it in the length direction of the field; b. Excavate the topsoil. First, dig out the top 20-30cm of soil and pile it on the empty land outside the field. c. Carry out ridge treatment, take the soil below the surface of the field soil, compact and raise the outer edge of the field soil to form a ridge, and the upper end of the ridge is about 10-30cm higher than the upper surface of the field soil; d. Carry out the construction of the first half of the field soil. First, dig half of the field soil downward along the field ridge and the inner wall of the field soil to the required depth (preferably, dig it down to a depth of 1m together with the surface soil). The digging direction is opposite to the wrapping direction of the lower film, and 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 then part of the excavated field soil is mixed with slaked lime (15% by mass) to make lime soil. A layer of lime soil is set on the side wall of the excavated field ridge and the inner wall of the field soil. Form a lime soil waterproof layer; unfold the rolled lower film along the lower surface of the excavated field soil in the excavation direction and leave a distance of 10-30cm on the edge of the unfolded part to form an upward folded edge along the field ridge and the inner wall of the field soil, and leave the unfolded lower film roll at the center line of the field soil and cover it for protection (it can be covered and protected with harder felt cloth or other objects as a mark and to effectively avoid damaging the lower film roll when the other half of the field soil is excavated); backfill the excavated front half of the field soil onto the laid lower film; e. Carry out construction on the second half of the field soil, dig the second half of the field soil downward along the field ridge and the inner wall of the field soil to the required depth (preferably, dig it down to a depth of 1m together with the surface soil), and pile the excavated soil on top of the other half of the field soil; level the lower surface of the excavated field soil, and set a layer of lime soil on the excavated side wall of the field ridge and the inner wall of the field soil to form a lime soil waterproof layer; unfold the lower film that has been laid to the midline position along the lower surface of the excavated field soil and leave a distance of 10-30cm at the edge to form a folded edge upward along the field ridge and the inner wall of the field soil; backfill the excavated second half of the field soil onto the laid lower film; f. Backfill the surface soil and lay the upper film. Evenly set downward depressions on the laid upper film, break the surface film at the center of the depression to set a water-permeable opening, and use soil or heavy objects to press down and fix the upper film around it.

[0028] In this way, the above construction method can be used to easily obtain a plateau slope field rainwater interception system, and retain the soil surface with high nutrients for planting. The construction can be carried out after the autumn harvest, which can effectively change the situation in which the rainfall period and crop growth period are not synchronized in the terraced farming area of ​​the Loess Plateau with an annual rainfall of 400 to 500 mm, and the crops in these areas cannot effectively use the rainfall, so the agricultural production level is low for a long time, and improve the field planting effect and land use efficiency of the loess slope.

[0029] 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 midline position of the field excavation, and after the lower film is laid to the baffle position, it is gradually spread upward along the baffle 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 of the field to the baffle position, and after the excavation is completed, the baffle is removed and the laying of the second half of the lower film begins. In this way, the protection and laying connection process of the lower film can be completed more smoothly.

[0030] The present invention has the following characteristics: 1. By setting a waterproof layer around the wall of the field and laying a leakage-proof lower film horizontally at a certain depth below the ground surface, the water that penetrates into the field can be stored in a certain depth (100 cm) of the field soil for a long time. 2. The upper film laid on the surface of the terrace effectively prevents the water stored in the soil from being lost due to evaporation. 3. During the growth and development period of crops, the water collected and stored in the soil during the rainy season is absorbed and utilized by crops to support the normal production of crops. Even in the event of drought and little rain, it can meet the normal growth and development of crops and ensure a certain yield. This way of preserving, regulating and utilizing rainwater has completely changed the situation in the past where there was no water guarantee for agricultural production on loess slopes.

[0031] In summary, the present invention has the characteristics of being able to better collect, store and utilize rainwater for planting, and is particularly suitable for application in plateau slopes, especially in loess high slope fields, to increase crop yields. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of a plateau sloping field rainwater interception system in a specific implementation manner of the present invention.

[0033] Figure 2 yes Figure 1 Schematic diagram of excavating the topsoil of the field during system construction. The arrows in the attached figure indicate the direction of transfer.

[0034] Figure 3 yes Figure 1 Schematic diagram of the system construction after the front half of the field soil is excavated.

[0035] Figure 4 yes Figure 1 Schematic diagram of the system during construction after the lower layer of film is laid on the front half of the field.

[0036] Figure 5 yes Figure 1 Schematic diagram of the system after all lower film layers have been laid and field soil has been backfilled, but the topsoil has not yet been backfilled.

[0037] Figure 6 yes Figure 1 Schematic diagram of the system after backfilling the topsoil but before laying the upper membrane. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with specific implementation modes.

[0039] Implementation method: A method for utilizing rainwater from sloping fields for planting, which is characterized in that after the autumn harvest, a barrier layer is set deep in the soil of the field to block water infiltration, and a barrier layer with a permeable function is set on the soil surface to block water evaporation, so that rainwater can be collected and stored until the spring planting of the following year.

[0040] In this way, this method enables the field soil itself to collect and preserve the rainwater that falls after the autumn harvest until the spring sowing of the following year, better preventing the rainwater from seeping downward through the soil and being lost. It is particularly suitable for application in plateau slopes, especially in loess high slope fields, to increase crop yields.

[0041] Specifically, the method is implemented by a plateau sloping soil rainwater interception system, the plateau sloping soil rainwater interception system, see Figure 1, including a lower film 1 horizontally laid at a depth of 0.5-1.5 meters below the surface of the field soil, the lower film 1 has a folded edge 2 folded upward around it, and also includes an upper film 3 laid above the surface of the field soil, the upper film 3 is provided with a plurality of recessed positions 4, and the recessed positions 4 are provided with openings for water permeability, and the upper film 3 and the lower film 1 are both impermeable films. In the figure, reference numeral 7 represents the surface soil.

[0042] In this way, after rain falls, it can gather in the concave position of the upper film and seep down, and then be intercepted by the lower film and stored in the soil. At the same time, the upper film can isolate and hinder the evaporation of water in the sun. Therefore, this rainwater interception system is used for planting on plateau slopes. It can intercept rainwater after the autumn harvest and wait for spring sowing in the next year. During spring sowing, plants can also be planted directly at the planting position by breaking through the upper film, so that the system can also maintain its function during the plant growth cycle, maximizing the utilization effect of rainwater and increasing plant yield.

[0043] In this embodiment, the lower film 1 is used to form the barrier layer at the deep soil layer of the field soil, and the upper film 3 is used to form the barrier layer at the surface of the soil, which has the advantages of low cost and convenient implementation. In other 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 the barrier layer at the deep soil layer, and using a one-way permeable membrane to form the barrier layer at the surface of the soil.

[0044] In this embodiment, the lower film 1 is 1 meter below the soil surface. Too deep will result in high construction costs and difficult for the stored water to be absorbed and utilized by the plants above during planting, while too shallow will result in poor water storage effect and easy to be destroyed by shallow soil organisms.

[0045] The folded edge 2 has an upward height of 10-30 cm. If it is too low, the stored water will easily leak out from the folded edge, resulting in poor water storage effect. If it is too high, the integrity of the field soil and the surrounding soil will be cut off, which is not conducive to the conduction of microorganisms in the soil and is likely to cause landslides on the field slope.

[0046] The upper surface and / or the lower surface of the lower film 1 is coated with an insect repellent coating.

[0047] In this way, small animals such as earthworms, mole crickets, crickets and even voles can be prevented from gnawing and damaging the film and causing leakage, thus extending the service life of the lower film.

[0048] Wherein, the insect repellent coating adopts a traditional Chinese medicine coating with insect repellent effect.

[0049] In this way, the insect repellent effect is achieved while being harmless to the planted plants and safer. In specific implementation, Chinese medicine can be made of powders of Chinese herbs such as Veratrum, Toosendan, Thunder Balls, and Castor Communis, mixed with pre-gelatinized starch, and then added to normal temperature water to form a paste, which is then applied to both sides of the lower film to prevent earthworms, grubs, mole crickets, cutworms and other organisms from biting and damaging the bottom film, forming holes and losing the water retention function. This has a better insect repellent effect, and is easy to adhere firmly to the lower film, so the insect repellent effect lasts longer and extends the service life of the lower film.

[0050] A layer of hydrophobic or waterproof material 5 is provided around the soil, located outside the folded edge and extending upward to the surface of the soil.

[0051] In this way, the water intercepted by the lower film can be effectively prevented from flowing upward over the folded edge due to the capillary phenomenon of the soil, thereby greatly improving the water storage and retention effect of the lower film.

[0052] Wherein, the hydrophobic or waterproof material layer 5 is a lime soil waterproof layer.

[0053] Lime soil is an existing formula material made of lime, clay and / or sand and water. The lime soil waterproof layer has excellent waterproof and air permeability, which can well prevent water from leaking out, and at the same time can well connect the inside and outside of the field soil, maintain air permeability (for plant growth needs), and prevent soil landslides. In specific implementation, it can be made by evenly mixing 15% slaked lime and 85% loess in a mass ratio.

[0054] The thickness of the lime soil waterproof layer is 1-5 cm, preferably about 3 cm. If it is too thin, it is difficult to ensure the effect, and if it is too thick, it is inconvenient to construct.

[0055] Among them, the outer edge of the field is also provided with a ridge 6 obtained by compacting the soil, and the upper end of the ridge 6 is about 10-30 cm higher than the upper surface of the field. This can better maintain the water storage effect of the field and can well prevent landslides.

[0056] Among them, the outer side of the ridge 6 is set as a slope, which can better prevent the slope from collapsing.

[0057] Among them, the outer slope angle of ridge 6 is less than 70. It can better prevent slope collapse.

[0058] Among them, the width of the upper end of the ridge 6 is greater than 50 cm, which can better prevent the slope from collapsing.

[0059] Therefore, the present invention adopts a certain engineering and technical measures system for the terraced farming areas of the Loess Plateau, which currently have no irrigation measures, to preserve the precipitation in the rainy season in these areas within a certain depth (100cm) above the cultivated soil, so that the surface layer of the terraced soil maintains a high moisture content, and measures are also taken to reduce the evaporation loss on the soil surface. When the soil moisture is better during the spring sowing next year, the planted crops will have a better soil moisture content to support their growth and development. At this time, even if there is no effective rainfall and the weather continues to be dry, the crop yield will not be greatly affected.

[0060] The plateau slope soil rainwater interception system is obtained by the following construction steps: a. Complete the preparatory work before excavation, cut a waterproof plastic film as the lower film according to the shape obtained by extending 10-30cm outward from the periphery of the field, apply a layer of insect repellent coating made from insect repellent Chinese medicine on the upper and lower surfaces of the lower film, and then wrap it in the length direction of the field; then cut a waterproof plastic film as the upper film according to the shape obtained by extending 5-10cm outward from the periphery of the field (to facilitate setting several concave positions on the upper film after it is laid), and then wrap it in the length direction of the field; b. Excavate the topsoil. First, dig out the top 20-30cm of soil and pile it on the vacant land outside the field. Figure 2 and Figure 3 ; c. Carry out ridge treatment, take the soil below the surface of the field soil, compact and raise the outer edge of the field soil to form a ridge, and the upper end of the ridge is about 10-30cm higher than the upper surface of the field soil; d. Carry out soil construction in the first half of the field, see Figure 3 and Figure 4 , first dig half of the field soil along the field ridge and the inner wall of the field soil to the required depth (preferably 1m deep together with the surface soil), the digging direction is opposite to the wrapping direction of the lower film, and 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 then part of the excavated field soil is mixed with 15% by mass of slaked lime to make lime soil, and a layer of lime soil is set on the excavated field ridge side wall and the inner wall of the field soil to form lime soil waterproofing Layer; unfold the rolled lower film along the lower surface of the excavated field soil in the excavation direction and leave a distance of 10-30cm on the edge of the unfolded part to form an upward folded edge along the field ridge and the inner wall of the field soil, and leave the unrolled lower film roll at the center line of the field soil and cover it for protection (it can be covered and protected with harder felt cloth or other objects as a mark and to effectively avoid damaging the lower film roll when the other half of the field soil is excavated); backfill the excavated front half of the field soil onto the laid lower film; e. Carry out the construction of the second half of the field soil. Dig the second half of the field soil downward along the field ridge and the inner wall of the field soil to the required depth (preferably, dig it down to a depth of 1m together with the surface soil), and pile the excavated soil on top of the other half of the field soil; level the lower surface of the excavated field soil, and lay a layer of lime soil on the excavated side wall of the field ridge and the inner wall of the field soil to form a lime soil waterproof layer; unfold the lower film that has been laid to the center line along the lower surface of the excavated field soil and leave a distance of 10-30cm at the edge to form a folded edge upward along the field ridge and the inner wall of the field soil; backfill the excavated second half of the field soil onto the laid lower film, see Figure 5 ; f. Backfill the topsoil (see Figure 6 ) and lay the top film (see Figure 1 ), evenly set downward depressions on the laid upper film, break the surface film at the center of the depression to set a water-permeable opening, and use soil or heavy objects to press down and fix the upper film around it.

[0061] In this way, the above construction method can be used to easily obtain a plateau slope field rainwater interception system, and retain the soil surface with high nutrients for planting. The construction can be carried out after the autumn harvest, which can effectively change the situation in which the rainfall period and crop growth period are not synchronized in the terraced farming area of ​​the Loess Plateau with an annual rainfall of 400 to 500 mm, and the crops in these areas cannot effectively use the rainfall, so the agricultural production level is low for a long time, and improve the field planting effect and land use efficiency of the loess slope.

[0062] Among them, in step d, after the excavation of the first half of the field is completed, a row of vertical baffles is set at the midline position of the field excavation. After the lower film is laid to the baffle position, it is gradually spread upward along the baffle 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 of the field to the baffle position. After the excavation is completed, the baffle is removed and the second half of the lower film is laid. In this way, the protection and laying connection process of the lower film can be completed more smoothly.

[0063] The present invention has the following characteristics: 1. By setting a waterproof layer around the wall of the field and laying a leakage-proof lower film horizontally at a certain depth below the ground surface, the water that penetrates into the field can be stored in a certain depth (100 cm) of the field soil for a long time. 2. The upper film laid on the surface of the terrace effectively prevents the water stored in the soil from being lost due to evaporation. 3. During the growth and development period of crops, the water collected and stored in the soil during the rainy season is absorbed and utilized by crops to support the normal production of crops. Even in the event of drought and little rain, it can meet the normal growth and development of crops and ensure a certain yield. This way of preserving, regulating and utilizing rainwater has completely changed the situation in the past where there was no water guarantee for agricultural production on loess slopes.

Claims

1. A method for planting using rainwater from sloping fields, characterized in that: After the autumn harvest, a barrier layer is set deep in the soil of the field to prevent water from seeping in. At the same time, a permeable barrier layer is set on the soil surface to prevent water evaporation, so that rainwater can be collected and stored until spring planting in the following year.

2. The method for planting using rainwater on sloping fields as claimed in claim 1, characterized in that: This method is implemented by relying on a plateau sloping soil rainwater interception system, which includes a lower film horizontally laid at a depth of 0.5-1.5 meters below the surface of the soil, the lower film having a folded edge folded upward around it, and an upper film laid above the surface of the soil, the upper film having a plurality of recessed positions, the recessed positions having openings for water permeability, and the upper film and the lower film are both impermeable films.

3. The method for planting using rainwater on sloping fields as claimed in claim 2, characterized in that: The lower film is at a depth of 1 meter below the soil surface.

4. The method for planting using rainwater on sloping fields as claimed in claim 2, characterized in that: The upward height of the folded edge is 10-30 cm.

5. The method for planting using rainwater on sloping fields as claimed in claim 2, characterized in that: The upper surface and / or the lower surface of the lower film is coated with an insect repellent coating.

6. The method for planting using rainwater on sloping fields as claimed in claim 5, characterized in that: The insect repellent coating adopts a traditional Chinese medicine coating with insect repellent effect.

7. The method for planting using rainwater on sloping fields as claimed in claim 2, characterized in that: A layer of hydrophobic or waterproof material is also arranged around the field soil, located outside the folded edge and upward to the surface of the field soil.

8. The method for planting using rainwater on sloping fields as claimed in claim 7, characterized in that: The hydrophobic or waterproof material layer is a lime soil waterproof layer.

9. The method for planting using rainwater on sloping fields as claimed in claim 2, characterized in that: The outer edge of the field is also provided with a ridge formed by compacting the soil, and the upper end of the ridge is about 10-30cm higher than the upper surface of the field; The outer side of the ridge is set as a slope; the slope angle of the outer side of the ridge is less than 70; the width of the upper end of the ridge is greater than 50cm.

10. The method for planting using rainwater on sloping fields as claimed in claim 2, characterized in that: The plateau slope soil rainwater interception system is obtained by the following construction steps: a. Complete the preparatory work before excavation, cut a waterproof plastic film as the lower film according to the shape obtained by extending 10-30cm outward from the periphery of the field, apply a layer of insect repellent coating made from insect repellent Chinese medicine on the upper and lower surfaces of the lower film, and then wrap it in the length direction of the field; then cut a waterproof plastic film as the upper film according to the shape obtained by extending 5-10cm outward from the periphery of the field, and then wrap it in the length direction of the field; b. Excavate the topsoil. First, dig out the top 20-30cm of soil and pile it on the empty land outside the field. c. Carry out ridge treatment, take the soil below the surface of the field soil, compact and raise the outer edge of the field soil to form a ridge, and the upper end of the ridge is about 10-30cm higher than the upper surface of the field soil; d. Carry out construction on the first half of the field soil. First, dig half of the field soil downward along the field ridge and the inner wall of the field soil to the required depth along the length direction of the field soil. The excavation direction is opposite to the direction of the lower film rolling, and 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 then part of the excavated field soil is mixed with slaked lime to make lime soil. A layer of lime soil is set on the excavated side wall of the field ridge and the inner 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 excavation direction and a distance of 10-30cm is left 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. The unfolded lower film roll is left at the midline of the field soil and covered for protection. The excavated first half of the field soil is backfilled onto the laid lower film. e. Carry out construction on the second half of the field soil, dig the second half of the field soil downward along the field ridge and the inner wall of the field soil to the required depth, and pile the excavated soil on top of the other half of the field soil; level the lower surface of the excavated field soil, and set a layer of lime soil on the excavated side wall of the field ridge and the inner wall of the field soil to form a lime soil waterproof layer; unfold the lower film that has been laid to the midline position along the lower surface of the excavated field soil and leave a distance of 10-30cm at the edge to form a folded edge upward along the field ridge and the inner wall of the field soil; backfill the excavated second half of the field soil onto the laid lower film; f. Backfill the surface soil and lay the upper film. Evenly set downward depressions on the laid upper film, break the surface film at the center of the depression to set a water-permeable opening, and use soil or heavy objects to press down and fix the upper film around it.

Images