A method for preventing wind and fixing sand in Horqin desertified grassland

Abstract

The invention provides a method for preventing wind and fixing sand in Horqin desertified grassland: S1, using automatic sand barrier laying equipment to lay mechanical sand barriers in Horqin desertified grassland; the material of the mechanical sand barriers is one or any combination of reed segments, straw curtains, straw, yellow willow, and tsavorona tsavorona branches; S2, planting biological sand barriers inside the mechanical sand barriers to form a composite sand barrier; the biological sand barriers are shrubs, and the shrubs are a combination of yellow willow, sea buckthorn, small-leaved caragana, caragana, sheep sedge, dawley lepsede, and artemisia chabaga; S3, sowing herbaceous plant seeds between the biological sand barriers; the herbaceous plants include leguminous plants, gramineous plants, and annual plants, and the leguminous plants: gramineous plants: annual plants=3:5:1 in terms of the number of plants; by adopting the technical scheme of the invention, the plant survival rate can reach up to 81.5% at the highest, and the coverage can reach up to 62.1%.

Description

Technical Field

[0001] The invention relates to the field of desertified grassland management, and in particular to a method for preventing wind and fixing sand in Horqin desertified grassland. Background Art

[0002] Horqin Desertified Grassland is one of the four largest desertified grasslands in my country. It is located between Chifeng City and Tongliao City in the lower reaches of the Xiliao River, with an area of ​​about 42,300 square kilometers. Its annual precipitation is 300-450 mm. It is the sandy area with the best moisture conditions in the country. Most of the sandy area is fixed and semi-fixed sand dunes. There is a fixed wet sand layer below 5 mm on the surface of the quicksand, which can help plants grow rapidly.

[0003] Inner Mongolia is the main battlefield for the country's "Three Norths" project and sand control and prevention, and it is also the region with the largest area of ​​desertified grassland in my country. The Horqin desertified grassland is one of the four major desertified grasslands in my country. After years of comprehensive and integrated management, the Horqin desertified grassland has shown a trend of decreasing mobile desertified grasslands and semi-fixed desertified grasslands, and increasing fixed desertified grasslands. At present, there are still more than 52.65 million mu of desertified grasslands, which has caused certain impacts on the lives of surrounding farmers and herdsmen and the nearby climate environment.

[0004] The patent document with announcement number CN 109056691 A discloses a method for controlling desertified grassland, which mainly discloses a method for unified control of large-scale deserts. In the current comprehensive sand control process, there is still a blank method for sand fixation specifically for the Horqin desertified grassland. At the same time, the existing technology still has problems such as poor plant adaptability in the process of controlling the Horqin desertified grassland. Summary of the invention

[0005] In order to solve the above technical problems, the present invention proposes a method for preventing wind and fixing sand in Horqin desertified grassland, in order to provide a more reference invention for the management of Horqin desertified grassland. The present invention selects a combination of native plants suitable for local growth for planting, and mainly adopts the method of "mechanical sand barrier + biological sand barrier + herbaceous plant seed sowing" to manage the Horqin desertified grassland, as follows:

[0006] A method for preventing wind and fixing sand in Horqin desertified grassland comprises the following steps:

[0007] S1. Use automatic sand barrier laying equipment to lay mechanical sand barriers in the Horqin desertified grassland;

[0008] The material of the mechanical sand barrier is one or any combination of reed segments, yellow willow, willow branches, straw curtains, and straw;

[0009] S2. Plant biological sand barriers inside mechanical sand barriers to form composite sand barriers;

[0010] The biological sand barrier is a shrub, and the shrub is any one or a combination of Salix gracile, Hippophae rhamnoides, Caragana microphylla, Caragana microphylla, Folium davuricula, Lespedeza davuricula, and Artemisia chabaga;

[0011] S3. Sowing herbaceous plant seeds between biological sand barriers;

[0012] The herbaceous plants include leguminous plants, gramineous plants and annual plants, and the ratio of leguminous plants: gramineous plants: annual plants is 3:5:1;

[0013] The legume plant is any one or a combination of Astragalus membranaceus, alfalfa and sweet clover;

[0014] The grass plant is any one or a combination of Leymus chinensis, Cleistogenes squarrosa, Agropyron ovata and Elymus dactylon;

[0015] The annual plant is any one or a combination of oats, foxtail grass, sago and ryegrass;

[0016] The sowing rate of the grass plant seeds is 1.5-3.5 kg / mu;

[0017] The sowing amount of the leguminous plant seeds is 0.5-1.5 kg / mu;

[0018] The sowing rate of the annual plant seeds is 0.5-1 kg / mu;

[0019] In terms of tree number ratio, shrubs:herbs = 1:3.5;

[0020] S4. Laying dead grass in the area where herbaceous plant seeds are sown;

[0021] The sowing of herbaceous plant seeds is based on the investigation and understanding of the local native species in Horqin, and then selects the dominant species with cold and drought resistance, strong carbon and nitrogen fixation ability, strong application ability and local characteristics. On the one hand, it can play the role of wind and sand fixation and maintaining water and soil stability, and on the other hand, it can also play the role of carbon and nitrogen fixation. At the same time, under the protection of the sand barrier, the herbaceous plants can survive better and easier;

[0022] The present invention matches legumes with gramineous plants, gramineous plants (leymus chinensis, Cleistogenes squarrosa, wheatgrass and Elymus dahliae) with legumes (Astragalus membranaceus, alfalfa and sweet clover), taking advantage of the cold-resistance and drought-resistance and strong adaptability of gramineous plants and the strong nitrogen-fixing ability of legumes, and adding a small amount of annual plants (oats, foxtail grass, sago and ryegrass) to increase species diversity; at the same time, while considering the life form and species family, the shrub-grass matching ratio of the plant biological sand barrier is also considered to form a trend of mixed growth of shrubs and grasses;

[0023] The automatic sand barrier laying equipment comprises a support frame, a material storage frame and a roller collection device, the central part of the support frame is rotatably connected to a sand barrier pressure plate for rolling, one end of the support frame is provided with a material discharge frame for material discharge, and the upper and lower ends of the material discharge frame are both open;

[0024] The material storage frame is rotatably connected to the support frame, and a plurality of rotating rods for support are rotatably connected to the material storage frame. The mechanical sand barrier is rolled into a roll and sleeved on the rotating rods, and the mechanical sand barrier roll is transported to the unloading frame through the material storage frame;

[0025] The roller collection device is fixedly connected to the material storage frame and is located above the material storage frame and the material discharge frame. After the mechanical sand barrier roll on the rotating roller is laid, the roller collection device is used to recover and store the rotating roller after laying;

[0026] The roller collection device includes an upper cover plate, a lower frame and a support rod for support. The lower frame is L-shaped and has an opening at the vertical end. The upper cover plate is detachably mounted on the upper surface of the lower frame. The lower frame is fixedly connected to the material storage frame through the support rod. The opening of the lower frame is located directly above the slot.

[0027] Moreover, the total height of the mechanical sand barrier is 300-400 mm, it is firmly buried and remains upright.

[0028] Moreover, the laying direction of the mechanical sand barriers is perpendicular to the main wind direction, and grid-shaped vertical sand barriers, vertical strip sand barriers, and flat sand barriers are adopted. The spacing between the grid-shaped vertical sand barriers is 2m×2m, the spacing between the vertical strip sand barriers is 2m, and flat sand barriers are laid between the vertical strip sand barriers.

[0029] Moreover, the seedlings of one or a combination of the yellow willow, sea buckthorn, small-leaved caragana, caragana, sheep sedge, davuri Lespedeza, and Artemisia chabaga are selected to be more than two years old, free of diseases and insect pests, without damage, with a seedling height of ≥500mm, a ground diameter of ≥4mm, normal color, full lignification, and complete main roots. The planting amount of seedlings is 111 plants / mu, the lateral roots are trimmed before planting, the planting depth is 200-300mm, so that the roots are completely buried in the soil, the soil is compacted after backfilling, and watering is carried out in time after planting.

[0030] Moreover, seeds of one or a combination of Leymus chinensis, Cleistogenes squarrosa, Agropyron rapae, Elymus davidianus, Sweet Clover, Astragalus indica, alfalfa, oats, Setaria viridis, Gnaphalium serrata and Lolium are mixed evenly, and mechanical no-tillage sowing is adopted, with a row spacing of 160 mm and a sowing depth of 10-20 mm.

[0031] Moreover, the supporting frame is respectively fixedly connected with a first support and a second support, the side surface of the material storage frame is rotatably connected to the first support via a rotating shaft, the second support is rotatably connected to a pneumatic telescopic rod, and the telescopic end of the pneumatic telescopic rod is rotatably connected to the lower surface of the material storage frame; with the cooperation of the second support and the pneumatic telescopic rod, the material storage frame is supported, and the material storage frame can rotate with the rotating shaft as the rotation center, and the pneumatic telescopic rod is connected to the material storage frame and the second support in a rotatable connection to avoid motion interference caused by the material storage frame during rotation.

[0032] Limiting grooves are provided on two opposite inner sides of the material storage frame, and both ends of the rotating rod are rollingly connected in the limiting grooves; a sliding entrance is provided on one side of the limiting groove, and the rotating rod enters the limiting groove through the sliding entrance, and a material guide plate for loading is fixedly connected to one side of the upper surface of the material storage frame; before starting work, the staff can add the mechanical sand barrier roll to the material storage frame through the material guide plate, and the rotating rod rolls into the limiting groove through the sliding entrance, and the rotating rod can be supported by the set limiting groove, so that the mechanical sand barrier roll maintains its original slackness, thereby preventing the bottom of the mechanical sand barrier roll from being flattened due to being placed for a long time.

[0033] The lower surface of the material guide plate is fixedly connected with a reinforcing rib, and the reinforcing rib is fixedly connected to the material storage frame. The load-bearing capacity of the material guide plate can be enhanced by the reinforcing rib to prevent the material guide plate from being crushed.

[0034] Moreover, a plurality of limit blocks are fixedly connected to one side of the upper surface of the material storage frame, and a slot is opened on the limit block, and a clamping block for limiting the rolling of the rotating rod is slidably connected to the slot, and one end of the clamping block is slidably connected in the slot, and the other end is U-shaped and sleeved on the roller body of the rotating rod; specifically, when the mechanical sand barrier roll is placed in the material storage frame, the clamping block is slid downward so that the U-shaped end of the clamping block is sleeved on the roller body of the rotating rod, thereby limiting the position of the mechanical sand barrier roll.

[0035] The upper surface of the support frame is fixedly connected with a rubber pad, the lower surface of the blanking frame is in contact with the rubber pad, and two opposite inner sides of the blanking frame are provided with a guide groove and a slot for guiding the rolling of the rotating roller, the slot is connected with the guide groove, and the rotating roller rolls into the slot through the guide groove;

[0036] The lower surface of the support frame is symmetrically fixedly connected with a docking seat, and a hydraulic telescopic rod is installed on the docking seat. The telescopic end of the hydraulic telescopic rod passes through the support frame and is fixedly connected to the blanking frame; the hydraulic telescopic rod is used to control the up and down movement of the blanking frame. When the support frame passes through the pit, the rubber pad can play a shock-absorbing role on the blanking frame to ensure the stability of the blanking.

[0037] Moreover, a telescopic pressing block is installed on one side of the material discharge frame, and an upper surface of the telescopic end of the telescopic pressing block is provided with an inclined surface, and the material storage frame is located directly above the telescopic end of the telescopic pressing block; specifically, when the hydraulic telescopic rod pushes the material discharge frame upward, the telescopic end of the telescopic pressing block will contact the material storage frame, and as the material discharge frame continues to move upward, the material storage frame will squeeze the inclined surface, so that the telescopic end of the telescopic pressing block will retract into the material discharge frame, thereby preventing the material discharge frame from being interfered with when it moves upward;

[0038] When the hydraulic telescopic rod pulls the unloading frame downward, the bottom of the telescopic end of the telescopic pressing block will exert a downward pressure on the material storage frame 2, and the material storage frame will rotate clockwise with the rotating shaft as the rotation center, and the pneumatic telescopic rod will be squeezed and contracted. At this time, the material storage frame is in an inclined state, and the clamping block is pushed upward to cancel the restriction on the rotating rod. At this time, the rotating rod rolls out of the limiting slide groove and falls on the unloading frame, and then rolls along the guide groove to the slot. As the material storage frame rotates and the unloading frame moves downward, the distance between the material storage frame and the unloading frame gradually increases, and when the telescopic end of the telescopic pressing block separates from the material storage frame, the downward pressure of the telescopic end on the material storage frame disappears, and the pneumatic telescopic rod in the contracted state will push the material storage frame to reset.

[0039] Sliding tracks are embedded in two opposite inner side surfaces of the lower frame body, and a sliding groove is formed between the sliding track and the lower frame body, and the sliding groove is adapted to the rotating rod.

[0040] Moreover, an opening is extended from the same end of the two sliding rails and the end is located directly above the slot, the extended portion of the sliding rail is adapted to the slot, and an installation opening is opened on the extended sliding rail, and a leaf spring is embedded in the installation opening.

[0041] Moreover, the leaf spring is arc-shaped and the arc edge extends out of the mounting opening, one end of the leaf spring is fixedly connected to the bottom of the mounting opening, and the other end is slidably connected to the mounting opening; specifically, when the hydraulic telescopic rod pushes the blanking frame upward, the extended sliding track will be inserted into the slot, and the rotating rod will be inserted between the sliding tracks and squeeze the leaf spring. After being squeezed, the leaf spring contracts, and its free end will slide upward in the mounting opening. As the blanking frame continues to move upward, the rotating rod in the slot will pass through the leaf spring and enter the sliding groove. At this time, the leaf spring restores its deformation to limit the rotating rod, thereby completing the recovery of the rotating rod.

[0042] A docking portion for installation is arranged on one side of the support frame away from the blanking frame.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] 1. The present invention specifically provides a method for preventing wind and fixing sand in the desertified grassland of Horqin. The method of "mechanical sand barrier + biological sand barrier + sowing of herbaceous plant seeds" is mainly used to control the desertified grassland of Horqin. The materials of the mechanical sand barrier are reed segments, yellow willow, tamarisk branches, straw curtains, and straw. Reed segments, straw curtains, and straw are cheap and easy to obtain, convenient to transport, highly adaptable, and resistant to wind and sand. Yellow willow and tamarisk branches have strong regeneration ability and are common species in the desertified grassland of Horqin. The biological sand barrier adopted by the present invention is a method for preventing wind and fixing sand and conserving water and soil by planting shrubs. The biological sand barrier is mainly implanted into the mechanical sand barrier to form a composite sand barrier, which takes advantage of the high water content and sufficient labor force of the desertified grassland in late autumn. At the right time, biological sand barriers are planted by combining shrubs (yellow willow, sea buckthorn, small-leaved caragana, caragana, sheep clover, dawley lepsyda, chabaga artemisia) and herbs (leymus chinensis, scaly-leaved cleistophylla, ice grass, alkali grass, sweet clover, astragalus, alfalfa, oats, foxtail grass, sago, and ryegrass) to achieve the purpose of plant fixation of quicksand; artificial sowing is based on the investigation and understanding of the local native species in Horqin, and then selects cold- and drought-resistant, carbon- and nitrogen-fixing ability-strong dominant species with local characteristics to be planted between sand barriers. On the one hand, it can play a role in preventing wind and sand and maintaining water and soil stability, and on the other hand, it can also play a role in carbon and nitrogen fixation. At the same time, under the protection of sand barriers, the sown species can survive better and easier.

[0045] 2. The present invention matches legumes and gramineous plants, gramineous plants (leymus chinensis, Cleistogenes squarrosa, Ice grass and Elymus dahliae) with legumes (Astragalus membranaceus, Medicago truncatula and Sweet Clover), taking advantage of the cold-resistance and drought-resistance and strong adaptability of gramineous plants, and the strong nitrogen-fixing ability of legumes, and adding a small amount of annual plants (oats, Setaria viridis, Gnaphalium sphaerocephalum and Lolium) to increase species diversity; at the same time, while considering the life form and species family, the proportion of shrubs and grasses is also considered to form a trend of mixed growth of shrubs and grasses. After multiple scientific experimental screenings, the wind-proof and sand-fixing effects on the Horqin desertified grassland were achieved.

[0046] 3. The present invention provides a method for preventing wind and fixing sand in the Horqin desertified grassland. By adopting the technical solution of the present invention, the plant survival rate can reach up to 81.5% and the coverage can reach up to 62.1%.

[0047] 4. The automatic sand barrier laying equipment provided by the present invention drives the feeding frame to move up and down through the hydraulic telescopic rod, recovers and stores the rotating rod on the feeding frame through the set roller collection device, and completes the loading of the feeding frame through the cooperation of the telescopic pressure block and the storage frame, thereby improving the replacement speed; with the cooperation of the second support and the pneumatic telescopic rod, the storage frame is supported, and the storage frame can rotate with the rotating shaft as the rotation center, and the pneumatic telescopic rod is connected to the storage frame and the second support in a rotating connection to avoid motion interference caused by the storage frame when rotating; the staff can add a mechanical sand barrier roll to the storage frame through the guide plate, and the rotating rod on the mechanical sand barrier roll rolls into the limiting slide through the sliding entrance, and the rotating rod can be supported by the set limiting slide, so that the mechanical sand barrier roll maintains its original slack.

[0048] 5. The automatic sand barrier laying device provided by the present invention, when the mechanical sand barrier roll is placed in the material storage frame, the clamping block is slid downward so that the U-shaped end of the clamping block is sleeved on the roller body of the rotating rod, thereby limiting the position of the mechanical sand barrier roll; the material discharge frame is controlled to move up and down by the hydraulic telescopic rod, and when the supporting frame passes through the pit, the rubber pad can play a shock absorbing role for the material discharge frame to ensure the stability of material discharge; when the hydraulic telescopic rod pushes the material discharge frame upward, the telescopic end of the telescopic pressing block will contact the material storage frame, and as the material discharge frame continues to move upward, the storage The material frame will squeeze the inclined surface, causing the telescopic end of the telescopic pressure block to retract into the material frame, so that the material frame will not be interfered with when it moves upward; when the hydraulic telescopic rod pushes the material frame upward, the extended sliding track will be inserted into the slot, and the rotating rod will be inserted between the sliding tracks and squeeze the leaf spring. After being squeezed, the leaf spring will shrink, and its free end will slide upward in the installation port. As the material frame continues to move upward, the rotating rod in the slot will pass through the leaf spring and enter the sliding groove. At this time, the leaf spring restores its deformation to limit the rotating rod, thereby completing the recovery of the rotating rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a three-dimensional schematic diagram of the overall automatic sand barrier laying equipment;

[0050] Figure 2 An exploded schematic diagram of a support frame, a material storage frame and a pneumatic telescopic rod in an automatic sand barrier laying device;

[0051] Figure 3 It is a schematic diagram of a material storage frame in the automatic sand barrier laying equipment;

[0052] Figure 4 This is an exploded schematic diagram of the transfer rod, limit block and clamp block in the automatic sand barrier laying equipment;

[0053] Figure 5 It is a schematic diagram of a material feeding frame and a telescopic pressing block in the automatic sand barrier laying equipment;

[0054] Figure 6 It is a schematic diagram of the upper cover plate and the lower frame of the automatic sand barrier laying equipment;

[0055] Figure 7 for Figure 6 A local enlarged schematic diagram of point A in the middle.

[0056] In the figure: 1. support frame; 2. material storage frame; 3. sand barrier pressure plate; 4. material discharge frame; 5. rotating rod; 6. sand barrier roll; 7. first support; 8. second support; 9. rotating shaft; 10. pneumatic telescopic rod; 11. limiting slide groove; 12. sliding entrance; 13. material guide plate; 14. reinforcing rib; 15. limiting block; 16. notch; 17. clamping block; 18. rubber pad; 19. guide groove; 20. slot; 21. telescopic pressure block; 22. inclined surface; 23. upper cover; 24. lower frame; 25. opening; 26. support rod; 27. sliding track; 28. sliding groove; 29. ​​installation mouth; 30. leaf spring; 31. docking seat; 32. hydraulic telescopic rod; 33. docking part. DETAILED DESCRIPTION

[0057] Example 1

[0058] like Figure 1-7 , an automatic sand barrier laying equipment, comprising a support frame 1, a material storage frame 2 and a roller collection device, wherein a sand barrier pressure plate 3 for rolling is rotatably connected to the central part of the support frame 1, and a material discharge frame 4 for discharging materials is arranged at one end of the support frame 1, and both upper and lower ends of the material discharge frame 4 are open;

[0059] The material storage frame 2 is rotatably connected to the support frame 1, and a plurality of rotating rods 5 for support are rollingly connected in the material storage frame 2, and a mechanical sand barrier roll is sleeved on the rotating rod 5, and the mechanical sand barrier roll is transported to the unloading frame 4 through the material storage frame 2;

[0060] The roller collection device is fixedly connected to the material storage frame 2 and is located above the material storage frame 2 and the material discharge frame 4. After the mechanical sand barrier roll on the rotating roller 5 is laid, the roller collection device is used to recover and store the rotating roller 5 after laying;

[0061] The roller-collecting device includes an upper cover plate 23, a lower frame 24 and a support rod 26 for support. The lower frame 24 is L-shaped and has an opening 25 at the vertical end. The upper cover plate 23 is detachably mounted on the upper surface of the lower frame 24. The lower frame 24 is fixedly connected to the material storage frame 2 through the support rod 26. The opening 25 provided in the lower frame 24 is located directly above the slot 20.

[0062] Furthermore, the support frame 1 is respectively fixedly connected with a first support 7 and a second support 8, the side of the material storage frame 2 is rotatably connected to the first support 7 via a rotating shaft 9, the second support 8 is rotatably connected with a pneumatic telescopic rod 10, and the telescopic end of the pneumatic telescopic rod 10 is rotatably connected to the lower surface of the material storage frame 2;

[0063] Two opposite inner sides of the material storage frame 2 are provided with a limiting slide groove 11, and the two ends of the rotating rod 5 are rollingly connected in the limiting slide groove 11. A sliding entrance 12 is provided on one side of the limiting slide groove 11, and the rotating rod 5 enters the limiting slide groove 11 through the sliding entrance 12. A material guide plate 13 for loading is fixedly connected to one side of the upper surface of the material storage frame 2;

[0064] A reinforcing rib 14 is fixedly connected to the lower surface of the material guide plate 13 , and the reinforcing rib 14 is fixedly connected to the material storage frame 2 .

[0065] Furthermore, a plurality of limit blocks 15 are fixedly connected to one side of the upper surface of the storage frame 2, and a notch 16 is provided on the limit block 15, and a clamping block 17 for limiting the rolling of the rotating roller 5 is slidably connected to the notch 16, and one end of the clamping block 17 is slidably connected to the notch 16, and the other end is U-shaped and sleeved on the roller body of the rotating roller 5;

[0066] The upper surface of the support frame 1 is fixedly connected with a rubber pad 18, the lower surface of the blanking frame 4 is in contact with the rubber pad 18, and the two opposite inner sides of the blanking frame 4 are provided with a guide groove 19 and a slot 20 for guiding the rolling of the rotating roller 5, the slot 20 is connected with the guide groove 19, and the rotating roller 5 rolls into the slot 20 through the guide groove 19;

[0067] A docking seat 31 is symmetrically fixedly connected to the lower surface of the support frame 1 , and a hydraulic telescopic rod 32 is installed on the docking seat 31 . The telescopic end of the hydraulic telescopic rod 32 penetrates the support frame 1 and is fixedly connected to the blanking frame 4 .

[0068] Furthermore, a telescopic pressing block 21 is installed on one side of the material unloading frame 4, and an inclined surface 22 is provided on the upper surface of the telescopic end of the telescopic pressing block 21, and the material storage frame 2 is located directly above the telescopic end of the telescopic pressing block 21;

[0069] Sliding rails 27 are embedded in two opposite inner side surfaces of the lower frame 24 . A sliding groove 28 is formed between the sliding rail 27 and the lower frame 24 . The sliding groove 28 is adapted to the rotating rod 5 .

[0070] Furthermore, an opening 25 is extended from the same end of the two sliding rails 27 and the end is located directly above the slot 20. The extended portion of the sliding rail 27 is adapted to the slot 20, and an installation opening 29 is opened on the extended sliding rail 27, and a leaf spring 30 is embedded in the installation opening 29.

[0071] Furthermore, the leaf spring 30 is arc-shaped and the arc edge extends out of the mounting opening 29, one end of the leaf spring 30 is fixedly connected to the bottom of the mounting opening 29, and the other end is slidably connected to the mounting opening 29;

[0072] A docking portion 33 for installation is provided on one side of the support frame 1 away from the blanking frame 4 .

[0073] Example 2

[0074] A method for preventing wind and fixing sand in Horqin desertified grassland comprises the following steps:

[0075] S1. Using the automatic sand barrier laying equipment provided in Example 1 to lay mechanical sand barriers in the Horqin desertified grassland;

[0076] The material of the mechanical sand barrier is a combination of reed segments, yellow willow, willow branches, straw curtains, and straw;

[0077] S2. Plant biological sand barriers inside mechanical sand barriers to form composite sand barriers;

[0078] The biological sand barrier is a shrub, and the shrub is any one or a combination of Salix gracile, Hippophae rhamnoides, Caragana microphylla, Caragana microphylla, Folium davuricula, Lespedeza davuricula, and Artemisia chabaga;

[0079] S3. Sowing herbaceous plant seeds between biological sand barriers;

[0080] The herbaceous plants include leguminous plants, gramineous plants and annual plants, and the ratio of leguminous plants: gramineous plants: annual plants is 3:5:1;

[0081] The legumes are a combination of Astragalus membranaceus, alfalfa and sweet clover;

[0082] The grass plant is any one or a combination of Leymus chinensis, Cleistogenes squarrosa, Agropyron ovata and Elymus dactylon;

[0083] The annual plants are a combination of oats, foxtail grass, sago and ryegrass;

[0084] The sowing rate of the grass plant seeds is 1.5 kg / mu;

[0085] The sowing rate of the leguminous plant seeds is 0.5 kg / mu;

[0086] The sowing rate of the annual plant seeds is 0.5 kg / mu;

[0087] In terms of tree number ratio, shrubs:herbs = 1:3.5;

[0088] S4. Spread dead grass in the area where herb seeds are sown.

[0089] Furthermore, the total height of the mechanical sand barrier is 300 mm and it remains upright.

[0090] Furthermore, the laying direction of the mechanical sand barrier is perpendicular to the main wind direction.

[0091] Furthermore, the shrubs are selected to be two years old or above, with a seedling height of ≥500mm and a ground diameter of ≥4mm, a planting amount of 111 plants / mu, and a planting depth of 200mm.

[0092] Furthermore, the row spacing of the herbaceous plants is 160 mm and the sowing depth is 10 mm.

[0093] Example 3

[0094] A method for preventing wind and fixing sand in Horqin desertified grassland comprises the following steps:

[0095] S1. Using the automatic sand barrier laying equipment provided in Example 1 to lay mechanical sand barriers in the Horqin desertified grassland;

[0096] The material of the mechanical sand barrier is a combination of reed segments, yellow willow, willow branches, straw curtains, and straw;

[0097] S2. Plant biological sand barriers inside mechanical sand barriers to form composite sand barriers;

[0098] The biological sand barrier is a shrub, and the shrub is any one or a combination of Salix gracile, Hippophae rhamnoides, Caragana microphylla, Caragana microphylla, Folium davuricula, Lespedeza davuricula, and Artemisia chabaga;

[0099] S3. Sowing herbaceous plant seeds between biological sand barriers;

[0100] The herbaceous plants include leguminous plants, gramineous plants and annual plants, and the ratio of leguminous plants: gramineous plants: annual plants is 3:5:1;

[0101] The legume plant is any one or a combination of Astragalus membranaceus, alfalfa and sweet clover;

[0102] The grass plant is a combination of Leymus chinensis, Cleistogenes squarrosa, Agropyron ovata and Elymus dactylon;

[0103] The annual plants are a combination of oats, foxtail grass, sago and ryegrass;

[0104] The sowing rate of the grass plant seeds is 3.5 kg / mu;

[0105] The sowing rate of the leguminous plant seeds is 1.5 kg / mu;

[0106] The sowing rate of the annual plant seeds is 1 kg / mu;

[0107] In terms of tree number ratio, shrubs:herbs = 1:3.5;

[0108] S4. Spread dead grass in the area where herb seeds are sown.

[0109] Furthermore, the total height of the mechanical sand barrier is 400 mm and it remains upright.

[0110] Furthermore, the laying direction of the mechanical sand barrier is perpendicular to the main wind direction.

[0111] Furthermore, the shrubs are selected to be two years old or above, with a seedling height ≥500mm and a ground diameter ≥4mm, a planting amount of 111 plants / mu, and a planting depth of 300mm.

[0112] Furthermore, the row spacing of the herbaceous plants is 160 mm and the sowing depth is 20 mm.

[0113] Example 4

[0114] A method for preventing wind and fixing sand in Horqin desertified grassland comprises the following steps:

[0115] S1. Using the automatic sand barrier laying equipment provided in Example 1 to lay mechanical sand barriers in the Horqin desertified grassland;

[0116] The material of the mechanical sand barrier is a combination of reed segments, yellow willow, willow branches, straw curtains, and straw;

[0117] S2. Plant biological sand barriers inside mechanical sand barriers to form composite sand barriers;

[0118] The biological sand barrier is a shrub, and the shrub is any one or a combination of Salix gracile, Hippophae rhamnoides, Caragana microphylla, Caragana microphylla, Folium davuricula, Lespedeza davuricula, and Artemisia chabaga;

[0119] S3. Sowing herbaceous plant seeds between biological sand barriers;

[0120] The herbaceous plants include leguminous plants, gramineous plants and annual plants, and the ratio of leguminous plants: gramineous plants: annual plants is 3:5:1;

[0121] The legumes are a combination of Astragalus membranaceus, alfalfa and sweet clover;

[0122] The grass plant is a combination of Leymus chinensis, Cleistogenes squarrosa, Agropyron ovata and Elymus dactylon;

[0123] The annual plants are a combination of oats, foxtail grass, sago and ryegrass;

[0124] The sowing rate of the grass plant seeds is 2 kg / mu;

[0125] The sowing rate of the leguminous plant seeds is 1 kg / mu;

[0126] The sowing rate of the annual plant seeds is 0.8 kg / mu;

[0127] In terms of tree number ratio, shrubs:herbs = 1:3.5;

[0128] S4. Spread dead grass in the area where herb seeds are sown.

[0129] Furthermore, the total height of the mechanical sand barrier is 350 mm and remains upright.

[0130] Furthermore, the laying direction of the mechanical sand barrier is perpendicular to the main wind direction.

[0131] Furthermore, the shrubs are selected to be two years old or above, with a seedling height of ≥500mm and a ground diameter of ≥4mm, a planting amount of 111 plants / mu, and a planting depth of 250mm.

[0132] Furthermore, the row spacing of the herbaceous plants is 160 mm and the sowing depth is 15 mm.

[0133] Comparative Example 1

[0134] The difference from Example 4 is that: it includes leguminous plants, gramineous plants and annual plants, and the ratio of leguminous plants: gramineous plants: annual plants is 5:2:3.

[0135] Comparative Example 2

[0136] The difference from Example 4 is that: it includes leguminous plants, gramineous plants and annual plants, and the leguminous plants: gramineous plants: annual plants = 2:5:3.

[0137] Comparative Example 3

[0138] The difference from Example 4 is that the legumes are alfalfa and sweet clover.

[0139] Comparative Example 4

[0140] The difference from Example 4 is that the leguminous plants are Astragalus membranaceus and Sweet Clover.

[0141] Comparative Example 5

[0142] The difference from Example 4 is that the leguminous plant is Sweet Clover.

[0143] Comparative Example 6

[0144] The difference from Example 4 is that the grass plants are Cleistogenes squarrosa, Agropyron cristobalii and Elymus dahliae.

[0145] Comparative Example 7

[0146] The difference from Example 4 is that the grass plants are Leymus chinensis, Cleistogenes scabra and Elymus dahliae.

[0147] Comparative Example 8

[0148] The difference from Example 4 is that the grass plants are Leymus chinensis, Cleistogenes scabra and Elymus dahliae.

[0149] Comparative Example 9

[0150] The difference from Example 4 is that the grass plant is Cleistogenes scabra.

[0151] Construction was carried out in spring, and the survival rates of the plants of Examples 2-4 and Comparative Examples 1-13 were counted in mid-August of the same year, as shown in Table 1 below.

[0152] Table 1

[0153]

[0154] It can be seen from the above experimental data that by adopting the technical scheme of the present invention, the survival rate can reach up to 83.5%, and the coverage can reach up to 63.1%. The unreasonable ratio of leguminous plants, gramineous plants and annual plants in Examples 1 and 2 affects the survival rate and coverage of grass seeds; the unreasonable selection of leguminous plants in Examples 3-5 and the unreasonable selection of gramineous plants in Examples 5-6 will ultimately affect the survival rate and coverage of plants.

Claims

1. A method for preventing wind and fixing sand in Horqin desertified grassland, characterized in that: The steps include: S1. Use automatic sand barrier laying equipment to lay mechanical sand barriers in the Horqin desertified grassland; The material of the mechanical sand barrier is one or any combination of reed segments, yellow willow, willow branches, straw curtains, and straw; S2. Plant biological sand barriers inside mechanical sand barriers to form composite sand barriers; The biological sand barrier is a shrub, and the shrub is any one or a combination of Salix gracile, Hippophae rhamnoides, Caragana microphylla, Caragana microphylla, Folium davuricula, Lespedeza davuricula, and Artemisia chabaga; S3. Sowing herbaceous plant seeds between biological sand barriers; The herbaceous plants include leguminous plants, gramineous plants and annual plants, and the ratio of leguminous plants: gramineous plants: annual plants is 3:5:1; The legume plant is any one or a combination of Astragalus membranaceus, alfalfa and sweet clover; The grass plant is any one or a combination of Leymus chinensis, Cleistogenes squarrosa, Agropyron ovata and Elymus dactylon; The annual plant is any one or a combination of oats, foxtail grass, sago and ryegrass; The sowing rate of the grass plant seeds is 1.5-3.5 kg / mu; The sowing amount of the leguminous plant seeds is 0.5-1.5 kg / mu; The sowing rate of the annual plant seeds is 0.5-1 kg / mu; In terms of tree number ratio, shrubs:herbs = 1:3.5; S4. Laying dead grass in the area where herbaceous plant seeds are sown; The automatic sand barrier laying equipment comprises a support frame (1), a material storage frame (2) and a roller collection device, wherein a sand barrier pressure plate (3) for rolling is rotatably connected to the central part of the support frame (1), and a material discharge frame (4) for discharging materials is arranged at one end of the support frame (1), and both upper and lower ends of the material discharge frame (4) are open; The material storage frame (2) is rotatably connected to the support frame (1); a plurality of supporting rollers (5) are rotatably connected to the material storage frame (2); a mechanical sand barrier roll is sleeved on the roller (5); and the mechanical sand barrier roll is transported to the unloading frame (4) through the material storage frame (2); The roller collection device is fixedly connected to the material storage frame (2) and is located above the material storage frame (2) and the material discharge frame (4). After the mechanical sand barrier roll on the rotating roller (5) is laid, the roller collection device is used to recover and store the rotating roller (5) after laying. The roller collection device comprises an upper cover plate (23), a lower frame (24) and a supporting rod (26); the lower frame (24) is L-shaped and has an opening (25) at its vertical end; the upper cover plate (23) is detachably mounted on the upper surface of the lower frame (24); the lower frame (24) is fixedly connected to the material storage frame (2) via the supporting rod (26); the opening (25) provided on the lower frame (24) is located directly above the slot (20); The support frame (1) is respectively fixedly connected to a first support (7) and a second support (8); the side of the material storage frame (2) is rotatably connected to the first support (7) via a rotating shaft (9); the second support (8) is rotatably connected to a pneumatic telescopic rod (10); the telescopic end of the pneumatic telescopic rod (10) is rotatably connected to the lower surface of the material storage frame (2); Two opposite inner side surfaces of the material storage frame (2) are provided with limit slide grooves (11), and the two ends of the roller (5) are rollingly connected in the limit slide grooves (11). A sliding entrance (12) is provided on one side of the limit slide groove (11), and the roller (5) enters the limit slide groove (11) through the sliding entrance (12). A material guide plate (13) for loading is fixedly connected to one side of the upper surface of the material storage frame (2); A reinforcing rib (14) is fixedly connected to the lower surface of the material guide plate (13), and the reinforcing rib (14) is fixedly connected to the material storage frame (2); A plurality of limit blocks (15) are fixedly connected to one side of the upper surface of the material storage frame (2), the limit blocks (15) are provided with slots (16), the slots (16) are slidably connected to clamp blocks (17) for limiting the rolling of the rollers (5), one end of the clamp blocks (17) is slidably connected to the slots (16), and the other end is U-shaped and sleeved on the roller body of the roller (5); The upper surface of the support frame (1) is fixedly connected with a rubber pad (18), the lower surface of the blanking frame (4) is in contact with the rubber pad (18), and two opposite inner side surfaces of the blanking frame (4) are provided with a guide groove (19) and a slot (20) for guiding the rolling of the roller (5), the slot (20) being connected to the guide groove (19), and the roller (5) rolls into the slot (20) through the guide groove (19); A docking seat (31) is symmetrically fixedly connected to the lower surface of the support frame (1), a hydraulic telescopic rod (32) is mounted on the docking seat (31), and the telescopic end of the hydraulic telescopic rod (32) penetrates the support frame (1) and is fixedly connected to the blanking frame (4).

2. A method for preventing wind and fixing sand in Horqin desertified grassland as claimed in claim 1, characterized in that: The total height of the mechanical sand barrier is 300-400 mm and remains upright.

3. A method for preventing wind and fixing sand in Horqin desertified grassland as claimed in claim 2, characterized in that: The laying direction of the mechanical sand barrier is perpendicular to the main wind direction.

4. A method for preventing wind and fixing sand in Horqin desertified grassland as claimed in claim 1, characterized in that: The shrubs are selected to be two years old or above, with a seedling height of ≥500mm and a ground diameter of ≥4mm. The planting amount is 111 plants / mu and the planting depth is 200-300mm.

5. A method for preventing wind and fixing sand in Horqin desertified grassland as claimed in claim 1, characterized in that: The row spacing of the herbaceous plants is 160 mm, and the sowing depth is 10-20 mm.

6. A method for preventing wind and fixing sand in Horqin desertified grassland as claimed in claim 1, characterized in that: A telescopic pressing block (21) is installed on one side of the material discharge frame (4), and an inclined surface (22) is provided on the upper surface of the telescopic end of the telescopic pressing block (21), and the material storage frame (2) is located directly above the telescopic end of the telescopic pressing block (21); Sliding rails (27) are embedded in two opposite inner side surfaces of the lower frame (24), a sliding groove (28) is formed between the sliding rail (27) and the lower frame (24), and the sliding groove (28) is adapted to the rotating roller (5).

7. A method for preventing wind and fixing sand in Horqin desertified grassland as claimed in claim 6, characterized in that: The same end of the two sliding rails (27) extends out of an opening (25) and the end is located directly above the slot (20); the extended portion of the sliding rail (27) is adapted to the slot (20); and a mounting opening (29) is provided on the extended sliding rail (27), and a leaf spring (30) is embedded in the mounting opening (29).

8. A method for preventing wind and fixing sand in Horqin desertified grassland as claimed in claim 7, characterized in that: The leaf spring (30) is arc-shaped and the arc edge extends out of the mounting opening (29); one end of the leaf spring (30) is fixedly connected to the bottom of the mounting opening (29), and the other end is slidably connected to the mounting opening (29); A docking portion (33) for installation is provided on one side of the support frame (1) away from the blanking frame (4).

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