Restoration method for difficult afforestation land

Abstract

The invention belongs to the technical field of difficult land afforestation, and particularly relates to a difficult afforestation land restoration method which comprises the following steps: S1, preparing a transplanting container which is provided with a transplanting cylinder cavity and a fixed cylinder cavity; s2, in the first year, the surface of the difficult land to be repaired is punched to form a planting pit, the transplanting container is buried in the planting pit, a fixing cylinder cavity is filled with wet nutrient soil, and vine plants are planted; s3, enabling the vine plants to grow for 1-2 years; and S4, a transplanting cylinder cavity of the transplanting container is cleaned, then the container seedlings are transplanted into the transplanting cylinder cavity, and repairing of the difficult afforestation land is completed. According to the method, the transplanting container is firstly fixed to the slope surface of the difficult land through the attachment characteristic of the vine plants to the rock, then the container nursery stocks are transplanted into the transplanting container, constraint is formed on the container nursery stocks, and therefore the problem that the nursery stock root systems are difficult to fix is solved, and the nursery stock survival rate is increased.

Description

Technical Field

[0001] This invention belongs to the field of afforestation technology in difficult areas, and specifically relates to a method for restoring difficult afforestation sites. Background Technology

[0002] Restoring areas difficult to afforest has always been a challenge in forestry production and ecological construction. These areas are typically steep mountain slopes and rocky terrain, characterized by scarce, dry, and infertile soil. Seedlings often fail to survive after transplanting, severely hindering the effectiveness and progress of afforestation and greening efforts.

[0003] Currently, the common method for restoring areas where afforestation is difficult is to transplant container seedlings. This involves planting seedlings in containers, which provide water and nutrients for the initial growth stage of the seedlings. However, due to the steep slopes, shallow soil layers, and loose gravel structure of the mountains, the seedling roots are difficult to fix in areas with difficult afforestation conditions under the influence of rainwater erosion and wind. The transplant containers and the seedlings themselves are prone to tipping over or sliding off the slope, resulting in a very low survival rate of the seedlings and failing to achieve the desired restoration effect. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides a method for restoring difficult afforestation sites. By utilizing the adhesion characteristics of vines to rocks, transplanting containers are first fixed to the slope of the difficult site, and then the seedlings are transplanted into the containers. This binds the seedlings, thereby solving the problem of difficult root fixation and improving the survival rate of the seedlings.

[0005] The specific technical solution adopted in this invention is as follows:

[0006] Methods for restoring areas where afforestation is difficult include the following steps:

[0007] S1. Prepare a transplanting container, which is equipped with a transplanting cavity and a fixing cavity;

[0008] S2. In the first year, holes are drilled in the difficult-to-repair surface to form planting pits. Transplant containers are buried in the planting pits, and moist nutrient soil is filled into the fixed cylinder and vine plants are planted.

[0009] S3. After 1-2 years of growth, the vines spread to the perimeter of the planting pit and surround it. The vines intercept the gravel, which accumulates on the lower slope side of the planting pit to form an interception zone.

[0010] S4. Clean the transplanting container cavity, and then transplant the seedlings from the container into the transplanting cavity to complete the restoration of the difficult afforestation site.

[0011] The transplanting container includes an inner cylinder and an outer cylinder. The outer cylinder is fitted onto the outside of the inner cylinder and connected by connecting rods. Multiple sets of connecting rods are arranged in the vertical direction. The hollow cavity of the inner cylinder forms the transplanting cavity of the transplanting container. The annular gap between the outer cylinder and the inner cylinder forms the fixing cavity of the transplanting container.

[0012] The connecting rod has a hollow structure, and the hollow channel of the connecting rod forms a growth channel for the roots of the container seedlings to pass through, and the roots of the container seedlings grow along the growth channel into the soil around the transplanting container.

[0013] The height of the outer cylinder is 3-5 cm lower than the height of the inner cylinder.

[0014] The outer cylinder has ventilation holes on its side wall, and there are multiple sets of ventilation holes.

[0015] The specific steps of step S2 are as follows:

[0016] S201. In the first year, holes are drilled in the difficult-to-repair surface to form planting pits, and the diameter of the planting pits is larger than the diameter of the transplanting container.

[0017] S202. Place the transplanting container in the center of the planting pit and use anchor bolts to fix the bottom of the transplanting container to the soil or rock below the transplanting container.

[0018] S203. Fill the gap between the transplanting container and the planting pit with a mixture of straw and soil to form a water-retaining layer;

[0019] S204. Fill the transplanting cavity with straw, and fill the fixing cavity with moist nutrient soil and plant vines.

[0020] The mixing ratio of straw and soil in step S203 is 1:2-3.

[0021] The vines include any one of Virginia creeper, ivy, Virginia creeper, or kudzu.

[0022] The nutrient soil is made by mixing leaf mold, garden soil and well-rotted organic fertilizer in a mass ratio of 4-5:2-3:1, and the moisture content of the nutrient soil is 40-50%.

[0023] The container seedlings mentioned in step S4 are one-year-old seedlings.

[0024] The beneficial effects of this invention are:

[0025] 1. This invention utilizes the extensive root systems and rapid growth of vines, as well as their ability to adhere to rocks. The transplanting container is first fixed to the slope of a difficult location, and then the seedlings are transplanted into the container. The vines indirectly bind the seedlings by fixing the transplanting container, thereby solving the problem of difficult root fixation and improving the survival rate of the seedlings.

[0026] 2. Because the roots of vines may become entangled with the roots of container seedlings in the transplanting container, and the container seedlings are not yet fully developed when planted, the stronger vines may steal nutrients from the container seedlings.

[0027] Therefore, the connecting rod in this invention is designed as a hollow structure and is not filled with straw. When cultivating vine-like plants, the roots of the vine-like plants grow and spread along the ventilation holes to the soil around the transplanting container. Under the influence of water and fertilizer attraction, the roots of the vine-like plants will not or will enter the transplanting cylinder cavity in little to no. After transplanting the container seedlings, the roots of the container seedlings will grow and spread along the space of the growth channel to the soil around the transplanting container, avoiding competition for nutrients and growth space between the container seedlings and the roots of the vine-like plants in the transplanting container. When the roots of the container seedlings pass through the outer cylinder along the growth channel and enter the external environment, the roots of the container seedlings and the vine-like plants work together to reinforce the surrounding gravelly soil, thus achieving the effect of restoration and soil and water conservation in areas where afforestation is difficult. Attached Figure Description

[0028] Figure 1 A schematic cross-section of a location where vine cultivation is difficult;

[0029] Figure 2 A schematic cross-sectional view of the repaired difficult terrain;

[0030] Figure 3 A top-down view of the repaired, difficult slope surface;

[0031] Figure 4 This is a schematic diagram of the side structure of the transplanting container;

[0032] Figure 5 A schematic diagram of the cross-sectional structure of the transplanting container.

[0033] In the attached diagram, 1 is the transplanting container, 2 is the inner cylinder, 3 is the outer cylinder, 4 is the connecting rod, 5 is the ventilation hole, A is the container seedling, B is the vine-like plant, C is the interception strip, and D is the water-retaining layer. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0035] Specific implementation, such as Figure 1-3As shown, the present invention provides a method for restoring land where afforestation is difficult, comprising the following steps:

[0036] S1. Prepare transplanting container 1, which is provided with transplanting cavity and fixing cavity;

[0037] S2. In the first year, holes are drilled in the surface of the land to be restored to form planting pits. Transplant container 1 is buried in the planting pits. Moist nutrient soil is filled into the fixed cylinder and vine-like plants B are planted.

[0038] S3. Vines B grow for 1-2 years. Vines B spread to the perimeter of the planting pit and surround it. Vines B intercept gravel, and the gravel accumulates on the low slope side of the planting pit to form an interception zone C.

[0039] S4. Clean the transplanting cavity of transplanting container 1, and then transplant the seedling A in the container into the transplanting cavity to complete the restoration of the difficult afforestation site.

[0040] Currently, for the restoration of areas where afforestation is difficult, the common method is to transplant seedlings in container 1. Seedlings are planted in transplanting containers 1, which provide water and nutrients for the initial growth stage of the seedlings. However, due to the steep slopes, shallow soil layers, and loose gravel structure of the mountains, the seedling roots are difficult to fix in areas where afforestation is difficult under the action of rainwater erosion and wind. The transplanting containers 1 and the seedlings themselves are prone to tipping over or sliding off the slope, resulting in a very low survival rate of the seedlings and failing to achieve the ideal restoration effect.

[0041] Therefore, this invention utilizes the adhesion characteristics of vine-like plant B to rocks to first fix the transplanting container 1 to a difficult hillside, and then transplant the container seedling A into the transplanting container 1. The root system and vine climbing of the vine-like plant B bind the container seedling A, thereby solving the problem of the seedling root system being difficult to fix and improving the seedling survival rate.

[0042] During the repair process, the transplanting container 1 is first buried in the planting pit. Then, a vine-like plant, such as Virginia creeper (Cercidiphyllum), is planted into the ring-shaped fixed cavity of the transplanting container 1. Virginia creeper is propagated through root cultivation, which reduces the cultivation cycle and increases its survival rate. Due to its growth characteristics, Virginia creeper continuously grows outwards, and its tendrils and suckers allow it to attach to the rocks on the hillside. The transplanting container 1 is thus connected to the hillside through the Virginia creeper.

[0043] Furthermore, in this embodiment, a covering blanket woven from rice straw is also provided, such as... Figure 4As shown, the inner cylinder 2 is higher than the outer cylinder 3. The covering blanket is set in a square or circular shape, with a central hole fitting onto the protruding part of the inner cylinder 2. The edge of the covering blanket can be fixed to the surface layer of areas where afforestation is difficult using anchor bolts. The roots of the Virginia creeper are covered under the covering blanket, which serves to insulate against heat, retain moisture, and intercept rainwater. When the Virginia creeper grows vines and branches that penetrate the straw gaps in the covering blanket, the Virginia creeper first climbs on the covering blanket, thus binding and reinforcing it. In areas where afforestation is difficult, there are many exposed rocks on the ground, and the temperature is high after being exposed to the sun. In the early stages of the growth of Virginia creeper, the mulch acts as an insulation, providing space for the Virginia creeper to climb and avoid being scalded. Therefore, in the early growth stage, Virginia creeper mainly climbs on the mulch. When the straw in the mulch decomposes, the Virginia creeper vines can fix the loose straw in place. When rain comes, it plays a role in absorbing water and allowing organic matter to seep in situ, continuously providing nutrients for the later growth of Virginia creeper and seedlings.

[0044] The transplanting cavity can be left empty to provide aeration for the roots of the vine-like plant B, or it can be filled with straw. Filling the transplanting cavity with straw serves two purposes: firstly, it helps to reserve space in advance for easy cleaning of the transplanting container 1 later, preventing foreign objects such as gravel from falling into the depths of the transplanting cavity; secondly, the straw can absorb and store a certain amount of moisture, releasing it slowly to maintain soil moisture and improve the soil in the planting pit. It should be noted that straw should not be stuffed into the connecting rod 4 to avoid providing a growth channel for the roots of the vine-like plant, which could lead to root backflow.

[0045] During the growth of Virginia creeper, the surface gravel on the high slope will continuously roll down due to rainwater erosion and wind. The horizontally growing Virginia creeper will intercept some of the gravel. As the gravel accumulates, it will form an intercepting zone C composed of gravel on the lower slope side of the planting pit, such as... Figure 2 As shown, interception zone C can intercept and slow down rainwater erosion from high slope to low slope, forming water storage. On the other hand, it can compact the cover blanket to prevent it from being blown away by the wind, improve the retention rate of humus, and allow rainwater to slowly seep into the soil to replenish the moisture of the seedlings. Furthermore, interception zone C will intercept fallen leaves and other materials, and the humus formed under the action of microorganisms can gradually improve the surrounding barren soil and achieve ecological restoration.

[0046] like Figure 4-5 As shown, the transplanting container 1 includes an inner cylinder 2 and an outer cylinder 3. The outer cylinder 3 is fitted onto the outside of the inner cylinder 2 and connected by a connecting rod 4. Multiple sets of connecting rods 4 are arranged in the vertical direction. The hollow cavity of the inner cylinder 2 forms the transplanting cavity of the transplanting container 1. The annular gap between the outer cylinder 3 and the inner cylinder 2 forms the fixing cavity of the transplanting container 1.

[0047] The inner cylinder 2 and the outer cylinder 3 are rigidly connected by the connecting rod 4, so that the transplanting container 1 is formed as a whole. This ensures that the vine-like plant B inside the fixed cylinder can fix the inner cylinder 2 and the seedlings inside the transplanting cylinder. At the same time, the connecting rod 4 also forms a winding point for the roots of the vine-like plant B to wind around, ensuring the connection between the vine-like plant B and the outer cylinder 3.

[0048] In this invention, the outer cylinder 3 is made of biodegradable paper material, the connecting rod 4 and the inner cylinder 2 are made of PVC pipe, and the lower side of the connecting rod 4 is cut with a slit, through which water can seep out. The inner cylinder 2 is provided with a through hole for the connecting rod 4 to pass through, and the side wall of the inner cylinder 2 is also pre-cut with through slits or weak grooves. When the root system of the seedling A in the container becomes strong, it can break the inner cylinder 2 and the connecting rod 4, thus avoiding restriction of growth.

[0049] like Figure 1-2 and Figure 5 As shown, the connecting rod 4 has a hollow structure, and the hollow channel of the connecting rod 4 forms a growth channel through which the roots of the container seedling A can pass. The roots of the container seedling A grow along the growth channel into the soil around the transplanting container 1.

[0050] Because the roots of vine B may become entangled with the roots of container seedling A within the transplanting container 1, and at this time the container seedling A is not yet fully developed, vine B and container seedling A will compete for nutrients, affecting the survival rate of container seedling A. Therefore, the connecting rod 4 in this invention has a hollow structure, such as... Figure 1 As shown, when cultivating vine-like plant B, the roots of vine-like plant B grow and spread along the ventilation holes 5 towards the soil around the transplanting container 1. This allows the transplanting container 1 to be fixed to the surrounding soil and gravel by the roots of vine-like plant B, improving the stability of the transplanting container 1. Furthermore, driven by its natural properties, the roots of vine-like plant B are less likely to enter the transplanting cavity. Figure 2 As shown, after transplanting seedling A into container 1, the roots of seedling A will grow and spread along the growth channel to the soil around the transplanting container 1, thus avoiding competition for space and nutrients with the roots of vine plant B through the fixed cavity. When the roots of seedling A in transplanting container 1 pass through the outer cylinder 3 along the growth channel and come into contact with the roots of vine plant B, the roots of seedling A in transplanting container 1 are already relatively mature. Moreover, the soil around the transplanting container 1 has been improved over the years, and its water and nutrients are sufficient to supply both seedling A and vine plant B. Therefore, vine plant B will not take away nutrients from seedling A.

[0051] Furthermore, to prevent the vines B from entangled with the container seedling A later, the vines B can be removed after 2-3 years of planting. After the roots of the vines B decompose, they will provide nutrients for the container seedling A. The vines on the ground can also temporarily fix the surface gravel. After the surface part decomposes, it can guide the roots of the container seedling A to grow towards the ground, so that the roots of the container seedling A can replace the vines in fixing the surface gravel.

[0052] like Figure 4-5 As shown, the height of the outer cylinder 3 is 3-5 cm lower than the height of the inner cylinder 2.

[0053] Firstly, the lower outer cylinder 3 guides the growth of vine-like plants B, causing their vines to spread outwards. Secondly, during rainfall, the water flow on the slope is slowed down by the vines and the gravel in the interception zone C, with some water seeping into the nutrient soil in the fixed cylinder cavity. The remaining runoff is dispersed and discharged along the top edge of the outer cylinder 3, preventing a large amount of rainwater from entering the inner cylinder 2 and causing root rot in the seedlings.

[0054] like Figure 4-5 As shown, the outer cylinder 3 has ventilation holes 5 on its side wall, and there are multiple sets of ventilation holes 5.

[0055] The ventilation holes 5 serve two purposes: firstly, they allow air to pass through, and secondly, they allow the roots of the vine-like plant B to penetrate the outer cylinder 3 and grow and spread into the surrounding soil.

[0056] The specific steps of step S2 are as follows:

[0057] S201. In the first year, holes are drilled in the difficult-to-repair ground to form planting pits, and the diameter of the planting pits is larger than the diameter of the transplanting container 1.

[0058] S202. Place the transplanting container 1 in the center of the planting pit and use anchor rods to fix the bottom of the transplanting container 1 to the soil or rock below the transplanting container 1.

[0059] S203. Fill the gap between the transplanting container and the planting pit with a mixture of straw and soil to form a water-retaining layer D.

[0060] S204. Fill the transplanting cavity with straw, and fill the fixing cavity with moist nutrient soil and plant vine-like plants B.

[0061] As the roots of vine-like plant B spread through the surrounding soil, they may grow along a curved path, turning and invading the transplanting cavity from the outside of the transplanting container 1 along the growth channel. Therefore, in this invention, a mixture of straw and soil is filled in the gap between the periphery of the transplanting container 1 and the planting pit to form a water-retaining layer D, such as... Figure 1-2 As shown.

[0062] Straw has a porous structure that can absorb and lock in moisture, reducing water loss in difficult conditions and providing a continuously moist environment for the roots of vine-like plant B. Since the water-retaining layer D is more suitable for root growth and there is no soil in the growth channel for the roots to absorb nutrients, the roots of vine-like plant B naturally spread towards the water-retaining layer D, preventing the roots of vine-like plant B from invading into the transplanting cavity.

[0063] Other examples Figure 1 As shown, in this invention, anchor rods are first used to pre-fix the transplanting container 1 to the difficult ground to avoid the situation where the transplanting container 1 detaches from the difficult ground before the vine-like plant B is fixed to the surrounding soil.

[0064] The mixing ratio of straw and soil in step S203 is 1:2-3.

[0065] The vine-like plants B include any one of Virginia creeper, ivy, Virginia creeper, or kudzu.

[0066] Climbing plants (B) are drought-tolerant, have a high survival rate, and low maintenance costs, meeting the economic requirements for restoration in difficult areas.

[0067] The nutrient soil is made by mixing leaf mold, garden soil and well-rotted organic fertilizer in a mass ratio of 4-5:2-3:1, and the moisture content of the nutrient soil is 40-50%.

[0068] The container seedling A mentioned in step S4 is a one-year-old seedling.

[0069] One-year-old seedlings have non-lignified roots and few lateral roots, making it easy to maintain the integrity of the soil ball during planting. After transplanting, the roots regenerate quickly and can rapidly take root in the deeper soil layers, thus improving the survival rate.

Claims

1. A method for restoring land where afforestation is difficult, characterized in that, Includes the following steps: S1. Prepare a transplanting container (1). The transplanting container (1) is provided with a transplanting cavity and a fixing cavity. S2. In the first year, holes are drilled in the surface of the land to be repaired to form planting pits. The transplanting container (1) is buried in the planting pit, and moist nutrient soil is filled in the fixed cylinder and vine plants are planted. S3. After 1-2 years of growth, the vines spread to the perimeter of the planting pit and surround it. The vines intercept the gravel, which accumulates on the lower slope side of the planting pit to form an interception zone. S4. Clean the transplanting container (1) Transplanting cylinder, and then transplant the seedlings in the container into the transplanting cylinder to complete the restoration of the difficult afforestation site.

2. The method for restoring land where afforestation is difficult according to claim 1, characterized in that, The transplanting container (1) includes an inner cylinder (2) and an outer cylinder (3). The outer cylinder (3) is fitted onto the outside of the inner cylinder (2) and connected by a connecting rod (4). Multiple sets of the connecting rod (4) are arranged in the vertical direction. The hollow cavity of the inner cylinder (2) forms the transplanting cavity of the transplanting container (1). The annular gap between the outer cylinder (3) and the inner cylinder (2) forms the fixing cavity of the transplanting container (1).

3. The method for restoring land where afforestation is difficult according to claim 2, characterized in that, The connecting rod (4) has a hollow structure. The hollow channel of the connecting rod (4) forms a growth channel through which the roots of the container seedlings can pass. The roots of the container seedlings grow along the growth channel into the soil around the transplant container (1).

4. The method for restoring land where afforestation is difficult according to claim 2, characterized in that, The height of the outer cylinder (3) is 3-5 cm lower than the height of the inner cylinder (2).

5. The method for restoring land where afforestation is difficult according to claim 2, characterized in that, The outer cylinder (3) has ventilation holes (5) on its side wall, and there are multiple sets of ventilation holes (5).

6. The method for restoring land where afforestation is difficult according to claim 1, characterized in that, The specific steps of step S2 are as follows: S201. In the first year, holes are drilled in the surface of the land to be repaired to form planting pits. The diameter of the planting pits is larger than the diameter of the transplanting container (1). S202. Place the transplanting container (1) in the center of the planting pit and use anchor rods to fix the bottom of the transplanting container (1) to the soil or rock below the transplanting container (1). S203. Fill the gap between the transplanting container (1) and the planting pit with a mixture of straw and soil to form a water-retaining layer; S204. Fill the fixed cavity with moist nutrient soil and plant vines.

7. The method for restoring land where afforestation is difficult according to claim 6, characterized in that, The mixing ratio of straw and soil in step S203 is 1:2-3.

8. The method for restoring land where afforestation is difficult according to claim 1, characterized in that, The vines include any one of Virginia creeper, ivy, Virginia creeper, or kudzu.

9. The method for restoring land where afforestation is difficult according to claim 1, characterized in that, The nutrient soil is made by mixing leaf mold, garden soil and well-rotted organic fertilizer in a mass ratio of 4-5:2-3:1, and the moisture content of the nutrient soil is 40-50%.

10. The method for restoring land where afforestation is difficult according to claim 1, characterized in that, The container seedlings mentioned in step S4 are one-year-old seedlings.

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