Vegetation restoration method for power transmission and transformation project disturbance area based on nutrient soil

Abstract

The invention provides a power transmission and transformation project disturbed area vegetation restoration method based on nutrient soil, which comprises the following steps: firstly, preparing nutrient soil from 20-30 parts by weight of organic soil, 50-70 parts by weight of original soil, 0.03 part by weight of a soil binder, 3-5 parts by weight of a water-retaining agent, 5-10 parts by weight of a compound fertilizer and 3-5 parts by weight of a microbial agent; turning over the disturbance area of the power transmission and transformation project, and compacting the prepared nutrient soil in the disturbance area; then preparing plant seeds including festuca arundinacea, ryegrass and cynodon dactylon; uniformly sowing plant seeds in the disturbance area; irrigating the disturbed area after sowing, so that the soil soaking depth reaches 5-10cm; according to the method, a good growth substrate can be provided for plant seeds through the prepared nutrient soil, the prepared plant seeds are matched with the prepared nutrient soil, protection of the coconut shred blanket is combined, the seeds can be prevented from being washed by rainwater before germination, and the germination rate is remarkably increased.

Description

Technical Field

[0001] The invention relates to a method for restoring vegetation in a disturbed area of ​​a power transmission and transformation project based on nutrient soil, and belongs to the technical field of soil and water conservation vegetation restoration. Background Art

[0002] Vegetation restoration of power transmission and transformation projects in hilly areas is a very important project in the water and soil conservation work of construction projects, and it is also very important in the later stage of the main project construction. Rapid vegetation restoration is of great significance to the water conservation acceptance, soil erosion and ecological environment beauty of power transmission and transformation projects in hilly areas. However, the vegetation restoration of power transmission and transformation projects in hilly areas is very difficult at present, and most of the vegetation restoration measures adopt simple artificial grass planting (sowing grass seeds). However, in special areas such as hilly areas, the site conditions are poor in themselves, and coupled with the damage during the construction process, the site conditions become worse, and vegetation restoration becomes very difficult. It is basically impossible for vegetation to recover in a short period of time, and it is even difficult to recover in place within a few years after the completion of construction. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the present invention provides a method for combining nutrient soil with coconut fiber blanket for thatching to achieve soil and water conservation and rapid vegetation recovery.

[0004] In order to achieve the above object, the technical solution proposed by the present invention is: a method for restoring vegetation in the disturbed area of ​​power transmission and transformation engineering based on nutrient soil, comprising the following steps:

[0005] S1. Prepare nutrient soil by taking 20-30 parts of organic soil, 50-70 parts of original soil, 0.03 parts of soil binder, 3-5 parts of water retaining agent, 5-10 parts of compound fertilizer and 3-5 parts of microbial agent according to weight;

[0006] Till the disturbed area of ​​the power transmission and transformation project and compact the prepared nutrient soil in the disturbed area;

[0007] S2, preparing plant seeds including tall fescue, ryegrass and bermudagrass; and evenly spreading the plant seeds in the disturbed area;

[0008] S3. After sowing, irrigate the disturbed area to soak the soil to a depth of 5-10 cm;

[0009] S4. Cover the disturbed area with 5-20 mm coconut fiber blanket.

[0010] A further design of the above technical solution is as follows: the organic soil in step S1 is organic soil containing 5% nitrogen, phosphorus and potassium, and the original soil is soil in the disturbed area.

[0011] The compound fertilizer is a mixed fertilizer with nitrogen:phosphorus:potassium = 15:15:15, and the microbial agent includes a microbial agent of nitrogen-fixing bacteria.

[0012] Before using nutrient soil, the soil in the disturbed area should be improved, and organic fertilizer, chemical improver, water retaining agent, nitrate nitrogen fertilizer, phosphorus-rich compound fertilizer, and potassium chloride fertilizer should be used to adjust and improve the organic matter, pH, soil moisture content, available nitrogen, available phosphorus, and available potassium respectively.

[0013] The bulk density of the soil after improvement in the disturbed area is 1.1-1.8g / cm 3 , pH content is 6.0-7.5, soil moisture content is 11-15%, organic matter content is 4.5-5.4g / kg, available nitrogen content is 74-88mg / kg, available phosphorus content is 41-55mg / kg, and available potassium content is 77-92mg / kg.

[0014] In the step S1, the disturbed area is plowed to a depth of 15-20 cm, and the prepared nutrient soil is mixed with the plowed soil in a ratio of 3:1 and compacted in the disturbed area.

[0015] In step S2, the ratio of tall fescue: ryegrass: bermudagrass in the plant seeds is 2:2:1.

[0016] In step S2, the plant seeds are soaked in hot water at 60-65 degrees Celsius for 3-5 minutes before being arranged, and then soaked in cold water at 20-25 degrees Celsius for 5-8 hours.

[0017] In step S2, the sowing density of plant seeds is 25-35 grams per square meter. After sowing, the seeds are covered with soil from the disturbed area and compacted to a thickness of 1 cm.

[0018] In the step S4, after laying the coconut fiber blanket, watering is performed on the top so that the water penetrates the coconut fiber blanket and soaks the soil to a depth of 1-2 cm.

[0019] The beneficial effects of the present invention are:

[0020] The nutrient soil prepared for hilly areas can provide a good growth matrix for plant seeds. The prepared plant seeds and the protection of the coconut fiber blanket can protect the seeds from rain scouring before germination, and the germination rate is significantly improved.

[0021] The coconut fiber blanket not only provides a stable growth environment for seeds, but also promotes the development of plant roots, allowing vegetation to grow rapidly and shortening the ecological recovery period.

[0022] The coconut fiber blanket used in the present invention can tightly fix soil particles, reduce soil erosion, and improve the soil's compressive and shearing strengths; after the coconut fiber blanket is tightly combined with the soil, a stable protective layer can be formed to effectively resist the scouring of rainwater and the erosion of the soil, and enhance the stability of the slope, which is particularly important for power transmission and transformation projects in hilly areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Flow chart of the method of the present invention. DETAILED DESCRIPTION

[0024] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Embodiment 1

[0026] This embodiment selects the temporary construction road area with a large slope at the G40 tower base of the 500 kV transmission project of the Jurong Pumped Storage Power Station in Jiangsu as the experimental site.

[0027] After the construction was completed, the area was renovated and grass seeds were sown, but the actual restoration effect was not ideal. The main reason was that the runoff formed by precipitation washed away the surface soil, making it difficult for vegetation to survive.

[0028] In this example, four plots of 1 meter by 1 meter were selected in the area, and the perimeters were enclosed and named L1, L2, L3 and L4, respectively, with L4 serving as a control plot. The plots were processed as follows:

[0029] Treatment methods for each block in the temporary construction road area

[0030]

[0031] According to the vegetation restoration method of this embodiment, each processing operation is as follows:

[0032] 1. Tillage: Tillage to a depth of 20 cm, either manually or mechanically, to ensure that the soil is loose.

[0033] 2. Clean up the gravel: Pick out all gravel with a diameter greater than 3 cm and level the soil in the disturbed area.

[0034] 3. Mixing of nutrient soil and tilled soil: Prepare nutrient soil by taking 20 parts of organic soil, 50 parts of original soil, 0.03 parts of soil binder, 3 parts of water retaining agent, 5 parts of compound fertilizer and 3 parts of microbial agent according to weight; Mix the nutrient soil and tilled soil in a ratio of 3:1 and compact it in the target area;

[0035] 4. Mixed sowing of nutrient soil and grass seeds: This grass seed uses tall fescue, ryegrass, and bermudagrass seeds, mixed in a ratio of 2:2:1, and the sowing density is 25 grams per square meter. After sowing, use an iron rake to make sure the grass seeds are covered and compacted.

[0036] 5. Watering: After sowing the grass seeds, sprinkle water 5 cm on each plot to moisten the soil.

[0037] 6. Cover with coconut fiber mat: After watering, lay a layer of coconut fiber mat about 5 mm thick. After laying, use nails to fix the coconut fiber mat on the soil. Sprinkle water on the surface of the coconut fiber mat. The water penetrates the coconut fiber mat to penetrate the soil to a depth of 1 cm to make it moist.

[0038] After completing the above steps, the plant growth was observed every 7 days. After one month of observation and comparison, it was found that the plant growth height of plot L1 reached 41 cm, and the vegetation coverage rate reached 99%, the plant growth height of plot L2 reached 18 cm, and the vegetation coverage rate reached 92%, the plant growth height of plot L3 reached 8 cm, and the vegetation coverage rate reached 80%, and the plant growth height of plot L4 reached 5 cm, and the vegetation coverage rate was less than 60%.

[0039] Therefore, this experiment shows that using soil improved with nutrient soil and using coconut fiber blanket to fix the soil will help plants grow well and meet the requirements for rapid vegetation recovery.

[0040] The optimized formula of the nutrient soil prepared in this embodiment is the basis for vegetation restoration. The optimized nutrient soil can provide sufficient nutrients and necessary nutritional support for plants, improve soil structure, and be beneficial to the development and expansion of plant roots.

[0041] As an environmentally friendly and degradable soil covering material, coconut fiber blanket plays an important role in the vegetation restoration of power transmission and transformation projects in hilly areas. It can enhance soil stability, fix soil particles, reduce soil erosion, improve soil compression and shear strength, and enhance slope stability. It can also promote vegetation growth, provide a good growth matrix for seeds, promote the development of plant roots, and improve the survival rate and growth rate of vegetation.

[0042] This embodiment combines the optimized formula of nutrient soil with coconut silk blanket covering to achieve rapid and efficient vegetation restoration of power transmission and transformation projects in hilly areas. The nutrient soil provides plants with rich nutrients and a suitable growth environment, while the coconut silk blanket protects the new vegetation from damage by the external environment. The two work together to significantly improve the survival rate of vegetation. The optimized nutrient soil promotes the rapid growth of plants, while the protective effect of the coconut silk blanket further ensures the growth environment of plants, thereby shortening the cycle of vegetation restoration. The rapid recovery of vegetation not only beautifies the environment, but also improves the ecological stability of hilly areas and reduces the risk of natural disasters such as soil erosion and landslides.

[0043] Embodiment 2

[0044] The experimental site area in this embodiment is the same as that in Example 1, except that in this embodiment, 30 parts of organic soil, 70 parts of original soil, 0.03 parts of soil binder, 5 parts of water retaining agent, 10 parts of compound fertilizer and 5 parts of microbial agent are taken by weight to prepare nutrient soil.

[0045] The organic soil is organic soil containing 5% nitrogen, phosphorus and potassium, the original soil is soil in the disturbed area, the compound fertilizer is a mixed fertilizer of nitrogen: phosphorus: potassium = 15:15:15, and the microbial agent includes microbial agents of nitrogen-fixing bacteria.

[0046] Before using the nutrient soil, the original landform soil is tested, and the indicators include soil bulk density, pH, organic matter, total nitrogen, available phosphorus, fast-acting potassium, slow-acting potassium, etc.; the soil bulk density content is 0.6-1.1g / cm 3 , pH content is 5.1-5.5, soil moisture content is 7-10%, organic matter content is 1.3-1.6g / kg, available nitrogen content is 31-43mg / kg, available phosphorus content is 3-6mg / kg, and available potassium content is 25-40mg / kg.

[0047] In this embodiment, organic fertilizer, chemical improver (phosphogypsum), water retaining agent, nitrate nitrogen fertilizer, phosphorus-rich compound fertilizer, and potassium chloride fertilizer are used to adjust and improve organic matter, pH, soil moisture content, available nitrogen, available phosphorus, and available potassium, respectively, so that the soil bulk density content is 1.1-1.8 g / cm 3 , pH content is 6.0-7.5, soil moisture content is 11-15%, organic matter content is 4.5-5.4g / kg, available nitrogen content is 74-88mg / kg, available phosphorus content is 41-55mg / kg, and available potassium content is 77-92mg / kg. The applicability of the above nutrient soil can be further improved by pre-improving the soil in the disturbed area.

[0048] The target area should be plowed to a depth of 15 cm, and then the prepared nutrient soil and plowed soil should be mixed in a ratio of 3:1 and compacted in the target area.

[0049] In this embodiment, before the plant seeds are arranged, they are soaked in 60 degrees Celsius hot water for 3 minutes, and then soaked in 20 degrees Celsius cold water for 5 hours. After filtering out the water, the seeds are screened to remove impurities and damaged seeds to increase the overall activity of the seeds; the plant seed sowing density is 35 grams per square meter. After sowing, the seeds are covered with soil from the disturbed area and compacted, with a covering thickness of 1 cm.

[0050] After sowing, use a sprayer to irrigate the disturbed area to a soil soaking depth of 10 cm to keep the soil moist to facilitate seed germination.

[0051] Finally, lay a 20 mm coconut fiber mat as a cover and water the coconut fiber mat again so that the water can penetrate the soil to a depth of 2 cm after passing through the coconut fiber mat.

[0052] Embodiment 3

[0053] The vegetation restoration method of this embodiment is applicable to areas in hilly areas where vegetation is damaged by power transmission and transformation projects, such as Figure 1 As shown, the specific steps include:

[0054] S1. Prepare nutrient soil by taking 25 parts of organic soil, 60 parts of original soil, 0.03 parts of soil binder, 4 parts of water retaining agent, 8 parts of compound fertilizer and 4 parts of microbial agent according to weight proportions; plow the disturbed area of ​​the power transmission and transformation project by 15 cm, mix the prepared nutrient soil with the plowed soil in a ratio of 3:1 and compact it in the disturbed area.

[0055] S2. Soak the seeds of tall fescue, ryegrass and bermudagrass in 65 degrees Celsius hot water for 5 minutes, then soak them in 25 degrees Celsius cold water for 8 hours. After filtering out the water, screen the seeds to remove impurities and damaged seeds, and then prepare the plant seeds in a ratio of tall fescue: ryegrass: bermudagrass of 2:2:1; evenly sow the plant seeds in the disturbed area at a sowing density of 30 grams per square meter.

[0056] S3. After sowing, irrigate the disturbed area to soak the soil to a depth of 8 cm.

[0057] S4. Cover the disturbed area with a 10 mm coconut fiber mat. After laying the coconut fiber mat, water it on top so that the water penetrates the soil to a depth of 1 cm after passing through the coconut fiber mat.

[0058] The technical solutions of the present invention are not limited to the above-mentioned embodiments, and any technical solutions obtained by equivalent replacement methods fall within the scope of protection required by the present invention.

Claims

1. A method for restoring vegetation in a power transmission and transformation project disturbance area based on nutrient soil, characterized in that: The steps include: S1. Prepare nutrient soil by taking 20-30 parts of organic soil, 50-70 parts of original soil, 0.03 parts of soil binder, 3-5 parts of water retaining agent, 5-10 parts of compound fertilizer and 3-5 parts of microbial agent according to weight; Till the disturbed area of ​​the power transmission and transformation project and compact the prepared nutrient soil in the disturbed area; S2, preparing plant seeds including tall fescue, ryegrass and bermudagrass; and evenly spreading the plant seeds in the disturbed area; S3. After sowing, irrigate the disturbed area to soak the soil to a depth of 5-10 cm; S4. Cover the disturbed area with 5-20 mm coconut fiber blanket.

2. The method for restoring vegetation in the disturbed area of ​​power transmission and transformation engineering based on nutrient soil according to claim 1 is characterized by: In step S1, the organic soil is organic soil containing 5% nitrogen, phosphorus and potassium, and the original soil is the soil in the disturbed area.

3. The method for restoring vegetation in the disturbed area of ​​power transmission and transformation engineering based on nutrient soil according to claim 2 is characterized by: The compound fertilizer is a mixed fertilizer with nitrogen:phosphorus:potassium = 15:15:15, and the microbial agent includes a microbial agent of nitrogen-fixing bacteria.

4. The method for restoring vegetation in the disturbed area of ​​power transmission and transformation engineering based on nutrient soil according to claim 3 is characterized by: Before using nutrient soil, the soil in the disturbed area should be improved by using organic fertilizer, chemical improvers, water retaining agents, nitrate nitrogen fertilizer, phosphorus-rich compound fertilizer, and potassium chloride fertilizer to adjust and improve the organic matter, pH, soil moisture content, available nitrogen, available phosphorus, and available potassium respectively.

5. The method for restoring vegetation in the disturbed area of ​​power transmission and transformation engineering based on nutrient soil according to claim 4 is characterized by: Improve the soil in the disturbed area so that the bulk density of the improved soil in the disturbed area is 1.1-1.8g / cm 3 , organic matter content is 4.5-5.4g / kg, pH content is 6.0-7.5, soil moisture content is 11-15%, available nitrogen content is 74-88mg / kg, available phosphorus content is 41-55mg / kg, and available potassium content is 77-92mg / kg.

6. The method for restoring vegetation in the disturbed area of ​​power transmission and transformation engineering based on nutrient soil according to claim 5 is characterized by: In the step S1, the disturbed area is plowed to a depth of 15-20 cm, and the prepared nutrient soil is mixed with the plowed soil in a ratio of 3:1 and compacted in the disturbed area.

7. The method for restoring vegetation in the disturbed area of ​​power transmission and transformation engineering based on nutrient soil according to claim 6 is characterized by: In step S2, the ratio of tall fescue: ryegrass: bermudagrass in the plant seeds is 2:2:

1.

8. The method for restoring vegetation in the disturbed area of ​​power transmission and transformation engineering based on nutrient soil according to claim 7 is characterized by: In step S2, the plant seeds are soaked in hot water at 60-65 degrees Celsius for 3-5 minutes before being arranged, and then soaked in cold water at 20-25 degrees Celsius for 5-8 hours.

9. The method for restoring vegetation in the disturbed area of ​​power transmission and transformation engineering based on nutrient soil according to claim 8, characterized in that: In step S2, the sowing density of plant seeds is 25-35 grams per square meter. After sowing, the seeds are covered with soil from the disturbed area and compacted to a thickness of 1 cm.

10. The method for restoring vegetation in the disturbed area of ​​power transmission and transformation engineering based on nutrient soil according to claim 9, characterized in that: In the step S4, after laying the coconut fiber blanket, watering is performed on the top so that the water penetrates the coconut fiber blanket and soaks the soil to a depth of 1-2 cm.

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