Vegetation recovery method for disturbed slash in red soil area

Abstract

The invention discloses a vegetation restoration method for a disturbed slash in a red soil area, which comprises the following steps of: improving disturbed soil in the red soil area, selecting reed-like and dicranopteris pedata which are suitable for red soil growth as pioneer species, planting the reed-like which is easy to grow to create favorable conditions for the growth of the dicranopteris pedata, planting the dicranopteris pedata, enabling the dicranopteris pedata to breed quickly, gradually eliminating the reed-like, and improving the quality of the dicranopteris pedata. A vegetation community structure with dicranopteris pedata as a main group is formed, and primary vegetation recovery is completed. According to the method, the bacteria liquid and the cementing liquid are sprayed after the dicranopteris pedata germinates, so that the technical problem that the dicranopteris pedata is planted after the bacteria liquid and the cementing liquid are sprayed, and the germination rate of the dicranopteris pedata is increased, and the vegetation recovery effect of the dicranopteris pedata is improved.

Description

Technical Field

[0001] The invention relates to the technical field of vegetation restoration, and in particular to a method for restoring vegetation on disturbed land in a red soil region. Background Art

[0002] When carrying out power transmission and transformation projects in red soil areas, it may cause various damages. First, the disturbance and compaction of the soil during construction will destroy the soil structure, weaken its aeration, permeability and water retention, and thus affect the growth of plants and the stability of the soil ecosystem. Secondly, mechanized construction may destroy the original vegetation, including trees, shrubs and grasslands, resulting in reduced vegetation cover and loss of ecological functions, posing a threat to the habitat and food source of local animals. In addition, the destruction of the surface cover will increase the risk of soil erosion and aggravate the problems of land desertification and water pollution. Ecological damage may also lead to the loss of local biodiversity, with some species facing the risk of extinction, affecting the local ecological environment.

[0003] Red soil has the characteristics of strong acidity, low organic matter content, and poor nutrients, which makes vegetation restoration difficult. Existing vegetation restoration methods are often not adapted to the special environment of red soil areas, and the restoration effect is poor. For example, Chinese Patent Publication No. CN108541522B discloses a method for restoring vegetation in an acidic mining dump, which includes the following steps: S1: Adjusting soil pH: Applying a neutralizer to the surface soil of the acidic waste soil in the dump with a pH below 4 and stirring evenly until the pH of the surface soil is 5.0-7.5 under the determination standard of 5:1 water-soil volume mass ratio, and the thickness of the surface soil is more than 25 cm; S2: Applying nutrient supplements: Applying nitrogen fertilizer and phosphorus fertilizer to the surface soil that has completed step S1 and stirring evenly; S3: Applying organic materials: Applying organic materials to the surface soil that has completed step S2 and stirring evenly, the improved soil obtained has a soil conductivity of ≤2.5ms·cm under the determination standard of 5:1 water-soil volume mass ratio. -1 , the organic material is plant straw powder or livestock manure; S4: planting pioneer plants on the soil improvement layer in S3. However, the applicant found that in this technical solution, the soil pH value is first adjusted to the target pH value, and then nutrients are applied to the soil, and then the pioneer plant reed is planted. Although the nutrients can promote the growth of the pioneer plant reed, when we subsequently planted Dicranopteris dichotoma, we found that the soil to which nutrients were applied before the germination of Dicranopteris dichotoma had a certain degree of adhesion, and the water retention capacity was reduced, which was not very beneficial for the emergence of Dicranopteris dichotoma and the germination of Dicranopteris dichotoma spores. Therefore, a vegetation restoration method is urgently needed to improve the germination rate of Dicranopteris dichotoma and the vegetation restoration effect, and improve the ecological environment. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a method for restoring vegetation on disturbed sites in red soil areas, which has a high germination rate of Dicranopteris dichotoma and good vegetation restoration effect.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A method for restoring vegetation on disturbed land in red soil areas comprises the following steps:

[0007] S1. adjusting the physical and chemical properties of the disturbed soil to target physical and chemical properties to obtain improved soil; the pH value of the target physical and chemical properties is 4.92 to 5.02;

[0008] S2. Plant multiple rows of reeds in the improved soil. When the reeds grow to more than 1.5 meters, sow spores of Dicranopteris dichotoma in the gaps between the rows of reeds.

[0009] S3. After the spores of Dicranopteris dichotoma grow leaf buds, spray the bacterial solution and the cementing solution into the soil in sequence for 3 to 5 days;

[0010] The bacterial liquid is Bacillus pasteurianus liquid, and the spraying amount is 150-180 mL / m 2 The spraying amount of the cementing liquid is 110-140 mL / m 2 .

[0011] As a further improvement of the above technical solution:

[0012] In step S1, the organic carbon content of the target physical and chemical properties is 3.35-3.46 g·kg -1 , the available nitrogen content is 25.67~26.89mg·kg -1 The available phosphorus content is 19.97-21.02 mg kg -1 , the content of available potassium is 27.84~29.43mg·kg -1 .

[0013] In step S3, the concentration of the Bacillus pasteurianus liquid is 10 6 ~10 7 CFU / mL, each liter of the cementing fluid includes 55-111 g of calcium chloride, 30-60 g of urea, and 0.4-0.5 g of sodium chloride.

[0014] In step S3, the step of sowing Dicranopteris dichotoma spores includes: mixing the Dicranopteris dichotoma spores and fine soil and sowing them together, covering them with a water-absorbing covering layer, and watering so that the soil surface is not dry until the Dicranopteris dichotoma spores grow leaf buds.

[0015] The water-absorbing covering layer is a mixture layer formed by straw segments and sawdust, the mass ratio of the straw segments to the sawdust in the mixture layer is 1.6-1.2:1, and the length of the straw segments is 0.5-1 cm.

[0016] The thickness of the water-absorbing covering layer is 2 to 3 centimeters.

[0017] The water-absorbing covering layer is a non-woven fabric layer.

[0018] In step S2, the row spacing between the multiple rows of reeds is 10 to 15 centimeters.

[0019] Step S1 includes the following steps:

[0020] A1. Detect and analyze the physical and chemical indicators of the disturbed soil to determine the physical and chemical properties of the disturbed soil, wherein the physical and chemical properties include bulk density, water holding capacity, particle size, pH, available nitrogen content, available phosphorus content, available potassium content, and organic matter content;

[0021] A2. Apply soil conditioners and soil water retainers to the disturbed soil until the target physical and chemical properties are achieved.

[0022] In step A2, the soil conditioner includes at least one of organic fertilizer, lime, and calcium magnesium phosphate fertilizer, and the soil water retaining agent includes at least one of polyacrylic acid-inorganic mineral type, polyacrylamide-inorganic type, and polyacrylic acid salt type.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The method for restoring vegetation in disturbed areas in red soil areas of the present invention improves the disturbed soil in the red soil area, selects reed and dichotoma suitable for the growth of red soil as pioneer species, first plants reed that is easy to grow, creates favorable conditions for the growth of dichotoma, and then plants dichotoma, which reproduces rapidly and gradually eliminates reed, forming a vegetation community structure with dichotoma as the main community species, and completing the initial restoration of vegetation. Spraying bacterial liquid and cementing liquid after dichotoma sprouts solves the technical problem that planting dichotoma after spraying bacterial liquid and cementing liquid is not conducive to the germination of dichotoma, and improves the germination rate of dichotoma and the vegetation restoration effect. DETAILED DESCRIPTION

[0025] A method for restoring vegetation on disturbed land in a red soil region of the present invention comprises the following steps:

[0026] S1: Adjust the physical and chemical properties of the disturbed soil to the target physical and chemical properties to obtain improved soil;

[0027] S2: Planting a plurality of rows of reeds in the improved soil, and sowing Dicranopteris dichotoma spores in the gaps between the rows of the reeds when the reeds grow to more than 1.5 meters.

[0028] S3: After the spores of the Dicranopteris dichotoma grow leaf buds, the bacterial solution is sprayed every day, and the binding liquid is sprayed after an interval of 3 to 7 minutes between spraying the bacterial solution, and the process continues for 3 to 5 days.

[0029] In the vegetation restoration method of the present invention, after the disturbed soil in the red soil area is improved, reed-like plants and dichotoma dichotoma suitable for the growth of red soil are selected as pioneer species. The reed-like plants that are easy to grow are planted first, and then favorable conditions are created for the growth of dichotoma dichotoma, and then dichotoma dichotoma is planted. The dichotoma dichotoma reproduces rapidly, gradually eliminates the reed-like plants, forms a vegetation community structure with dichotoma dichotoma as the main community species, and completes the initial restoration of vegetation. After the dichotoma dichotoma sprouts, the bacterial liquid and the cementing liquid are sprayed, which solves the technical problem that the dichotoma dichotoma is not conducive to the germination of the dichotoma dichotoma after the bacterial liquid and the cementing liquid are sprayed, and the germination rate of the dichotoma dichotoma and the vegetation restoration effect are improved.

[0030] In step S1, the target physical and chemical properties are: pH value 4.92-5.02, organic carbon content 3.35-3.46 g·kg -1 , available nitrogen content 25.67~26.89mg·kg -1 , available phosphorus content 19.97~21.02mg·kg -1 , the content of fast-acting potassium is 27.84~29.43mg·kg -1 .

[0031] In step S1, the disturbed soil is red soil. Red soil is a type of soil widely distributed in subtropical and tropical regions with unique physical and chemical properties. Red soil appears red or brownish red because it contains a large amount of iron oxide and aluminum oxide. Red soil is usually acidic to strongly acidic, with a pH value generally between 4.5 and 5.5. The aggregate structure of red soil is poor, but it is rich in iron and aluminum hydroxide colloids, which contribute to the formation of microaggregates. Red soil has a high organic matter content, but due to the strong biological cycle, the organic matter content will drop rapidly after reclamation.

[0032] In step S1, the physical and chemical properties need to be adjusted to the target physical and chemical properties to facilitate plant growth and recovery. The physical and chemical properties of the soil are measured with reference to the "Soil Agricultural Chemical Analysis Methods", where the bulk density and water holding capacity are measured by the ring knife method; the particle size is measured by a laser particle size analyzer (Malvern particle size analyzer, MS3000, UK); the soil pH value is measured by a PHS-3C glass electrode pH meter (Ray Magnetics, Shanghai), with a soil-water ratio of 1:2.5; the soil available phosphorus (Available phosphorous, AP) is measured by 0.5 mol·L -1 Sodium bicarbonate method was used to determine the available potassium in soil. -1 Neutral NH4OAc (pH = 7) solution, flame photometer ammonium acid-flame photometer method, soil available nitrogen (AN) content using 1.0 mol·L -1The content of soil organic carbon (SOC) was determined by the NaOH alkaline diffusion method; the content of soil organic carbon (SOC) was determined by the K2Cr2O7-H2SO4 heating method.

[0033] In step S2, the reed is a perennial herbaceous plant of the subfamily Poaceae, which is extremely resistant to drought and barrenness; it has strong root tillering ability and large biological growth. When planted in extremely severe soil erosion areas, the reed can grow into a dense bush more than 2 meters high, which can not only quickly cover the surface and effectively prevent soil erosion, but also quickly change the harsh ecological environment in the soil erosion area, creating favorable conditions for the invasion of dicranopteris and other grass and shrub plants, greatly accelerating the greening control process in the soil erosion area and improving the control effect.

[0034] In step S2, Dicranopteris dichotoma, also known as centipede grass, is a common fern. Dicranopteris dichotoma can adapt to acidic soil and can grow even in drought and barren conditions. Dicranopteris dichotoma can grow tenaciously in mountainous areas and areas of soil erosion due to its crisscrossing underground stems and adventitious roots that penetrate more than 3 meters into the soil layer.

[0035] In step S2, seeds of Phragmites australis are sown in the improved soil, and after they grow into dense plants, spores of Dicranopteris dichotoma are sown in the soil.

[0036] In step S3, the bacterial solution has a concentration of 10 3 ~10 7 CFU / mL of Bacillus pasteurianus liquid, each liter of the cementing liquid contains 55-111g of calcium chloride, 30-60g of urea, and 0.4-0.5g of sodium chloride. The spraying amount of the bacterial liquid is 50-200mL / m 2 The spraying amount of the cementing liquid is 30-150 mL / m 2 .

[0037] In step S3, the bacterial liquid refers to a microbial mineralized bacterial liquid, which is a pasteurian Bacillus bacterial liquid, such as a pasteurian spore octahedralis bacterial liquid. The pasteurian spore octahedralis can produce urease, which decomposes urea to produce carbonate ions through the action of urease, and combines with free calcium ions in the soil to form calcium carbonate (CaCO3), thereby promoting the formation of soil cement and enhancing the overall stability of the substrate.

[0038] In step S3, the cementing fluid provides the basic nutrients and conditions required for the microbial mineralization process, wherein urea provides a carbon source and a nitrogen source, decomposes and produces carbonate ions under the action of urease, and calcium chloride provides a calcium source, provides calcium ions, and the two combine to produce calcium carbonate precipitation. Calcium carbonate crystals effectively fill the pores in the substrate and enhance the bonding effect between different materials. In addition, the nutrients such as surplus urea can promote the growth of plants, thereby forming a plant growth environment with a certain strength and air permeability. And other bacterial liquids, such as Bacillus subtilis and Bacillus licheniformis, cannot produce carbonate ions, or the ability to produce carbonate ions is weak, and the effect cannot be achieved by cooperating with the cementing fluid.

[0039] In the present application, the method of spraying bacterial liquid and cementing liquid after planting Dicranopteris dichotoma is selected, rather than spraying bacterial liquid and cementing liquid first and then planting plants. The main reason is that the reed-like plant is relatively adaptable to the soil. When the bacterial liquid and cementing liquid are not sprayed, it can also grow well, but the growth rate is relatively slow. After spraying the bacterial liquid and cementing liquid, the soil has a certain degree of adhesion, the water retention performance is reduced to a certain extent, and the emergence is not very favorable, so it is not conducive to the germination of Dicranopteris dichotoma spores. Therefore, in the present application, after the Dicranopteris dichotoma spores grow leaf buds, the bacterial liquid and cementing liquid are sprayed again. That is, it avoids its disadvantage to spore germination, and it plays its role in soil improvement. In this way, the reproduction speed and growth of the reed-like plant are improved. The next generation of spores will germinate in the following year. During this period of time, the soil has been transformed by contemporary Dicranopteris dichotoma and reed-like plants, which is suitable for the germination of the next generation of spores. Moreover, the horizontal spreading growth of the rhizomes of Dicranopteris dichotoma increases the surface coverage, improves the fertility of the topsoil, and improves the physical and chemical conditions of the soil, providing better conditions for the growth and reproduction of VA mycorrhiza of quasi-reed. The combined use of cementing liquid and bacterial liquid can increase the number of microorganisms in the soil, forming a virtuous cycle and promoting the growth of quasi-reed and Dicranopteris dichotoma.

[0040] The VA mycorrhiza of phragmites can activate the phosphorus in the soil, improve the absorption capacity of phragmites to nitrogen and phosphorus, and promote the growth of phragmites. The combined use of cementing liquid and bacterial liquid can increase the activity of phosphorus in the soil, enhance the absorption of these nutrients by phragmites and dicranopteris, and thus promote their growth.

[0041] In some embodiments, in step S3, the bacterial solution has a concentration of 10 6 ~10 7 CFU / mL of Bacillus pasteurianus liquid, each liter of the cementing liquid contains 55-111g of calcium chloride, 30-60g of urea, and 0.4-0.5g of sodium chloride; the spraying amount of the bacterial liquid is 150-180mL / m 2 The spraying amount of the cementing liquid is 110-140 mL / m 2 Under this condition, the soil transformation effect is better and more conducive to the growth of vegetation such as reed and reed.

[0042] In some embodiments, in step S3, the step of sowing Dicranopteris spores includes: mixing Dicranopteris spores with fine soil (i.e., fine-grained soil, which refers to soil with a coarse particle content (greater than 0.075 mm) of less than 50%, a maximum particle size of no more than 4.75 mm, and a nominal maximum particle size of no more than 2.36 mm) and then broadcasting, covering with a water-absorbing covering layer, and watering once every day so that the soil surface is not dry until the Dicranopteris spores grow leaf buds. The water retention capacity of red soil is affected by its structure and mineral composition, and may not be as good as other types of soil, and the water retention capacity of disturbed soil is relatively reduced due to the lack of plants. The germination of Dicranopteris spores prefers a moist environment. The tall plants of the reed-like plants can block sunlight and provide a cool environment. The water-absorbing covering layer provides a cool environment on the one hand, and can absorb and retain moisture on the other hand. Therefore, the germination rate of the Dicranopteris spores of the present invention is high and the germination speed is also fast.

[0043] In some embodiments, the water-absorbing covering layer is a mixture layer formed by straw segments and sawdust, the mass ratio of the straw segments to the sawdust is 1.6 to 1.2:1, and the length of the straw segments is 0.5 to 1 cm. The mixture layer formed by sawdust and straw segments is loose and has a large number of pores. On the one hand, it covers the spores of Dicranopteris dichotoma, and on the other hand, both (sawdust and straw segments) are hygroscopic and have good water retention performance. Furthermore, the fine particles of sawdust can improve the aeration of the soil, while the coarse fibers of the straw help to form a good soil aggregate structure. Mixed use can more comprehensively improve the physical properties of the soil and promote the growth of plant roots. Over time, both sawdust and straw will gradually decompose, releasing organic matter and nutrients. Mixed use can increase the types and quantities of available nutrients in the soil, thereby improving soil fertility. In addition, the mixture layer can effectively inhibit the growth of weeds, suffocate weed seeds and seedlings, reduce weed competition, and contribute to the healthy growth of plants. It cannot be ignored that the mixture layer provides a richer habitat for soil microorganisms, promoting the reproduction and activity of microorganisms, especially Bacillus pasteurianus in the bacterial solution, which helps to improve the biological activity of the soil.

[0044] In some embodiments, the water-absorbing covering layer has a thickness of 2 to 3 cm, which can provide both protective covering and water-retaining effects while not being too thick to hinder the emergence of Dicranopteris dichotoma spores.

[0045] In some embodiments, the straw segment is rolled rice straw. After the rice straw is rolled, the specific surface area increases, the water-absorbing covering layer becomes looser, the covering and water-retaining effects are better, and the rice straw decomposes and decays faster to provide nutrients.

[0046] In some embodiments, the water-absorbing cover layer is a non-woven fabric, which has good moisture absorption effect, is easy to implement, and saves labor.

[0047] In some embodiments, the spacing between the rows of reeds is 10 to 15 centimeters.

[0048] In some embodiments, the step of adjusting the physical and chemical properties of the disturbed soil to target physical and chemical properties to obtain improved soil comprises:

[0049] B1. Detecting and analyzing the physical and chemical indexes of the disturbed soil to determine the physical and chemical properties of the disturbed soil;

[0050] The indicators of physical and chemical properties include bulk density, water holding capacity, particle size, pH, available nitrogen content, available phosphorus content, available potassium content, and organic matter content.

[0051] B2. applying a soil conditioner and a soil water retaining agent to the disturbed soil until the target physical and chemical properties are achieved.

[0052] In some embodiments, the soil conditioner includes at least one of organic fertilizer, lime, and calcium magnesium phosphate fertilizer, and the soil water-retaining agent includes at least one of polyacrylic acid (PAA, CH2=COOH)-inorganic mineral (Na2SiO3, MgSiO3, Al2(SiO3)3, etc.) type, polyacrylamide (PMA, CH2=CHONH2)-inorganic type, and polyacrylate type.

[0053] Organic fertilizer refers to commonly used fertilizers including human feces, manure, compost, green manure, cake fertilizer, and biogas fertilizer.

[0054] The present invention will be described in further detail below. Unless otherwise specified, the instruments or materials used in the present invention are commercially available.

[0055] A disturbed area of ​​red soil was selected as the test site in Changsha, Hunan Province. The test site was divided into several test areas, with a distance of 2 meters between each test area to reduce the impact on each other. Each test area is 5 meters long and 3 meters wide.

[0056] Example 1

[0057] The method for restoring vegetation on disturbed land in red soil region of this embodiment comprises the following steps:

[0058] S10: adjusting the physical and chemical properties of the disturbed soil to target physical and chemical properties to obtain improved soil, comprising the following steps:

[0059] A1. Determination of basic physical and chemical properties of soil in a test area: pH value 4.22, available nitrogen content 23.07 mg kg -1 , available phosphorus content 18.84 mg kg -1 , fast-acting potassium content 26.56 mg kg -1 , organic carbon content 2.59g·kg -1The contents of sand (0.05-2 mm), silt (0.002-0.05 mm) and clay (<0.002 mm) in the soil were 79.22%, 14.78% and 6.0% respectively, and the soil bulk density was 8.34 g / cm 3 , water holding capacity 8.34%.

[0060] A2. The test area was plowed and leveled, and then three soil conditioners, organic fertilizer, lime and calcium magnesium phosphate fertilizer (mass ratio 40:2:1) were applied, and polyacrylic acid-inorganic mineral type was applied as soil moisturizer, so that the soil in the test area met the basic physical and chemical property target values: pH value 4.92-5.02, within this pH range, the organic carbon content was 3.35-3.46 g kg -1 , available nitrogen content 25.67~26.89mg·kg -1 , available phosphorus content 19.97~21.02mg·kg -1 , the content of fast-acting potassium is 27.84~29.43mg·kg -1 .

[0061] S20: planting multiple rows of reeds in the improved soil, and sowing Dicranopteris dichotoma spores in the gaps between the rows of the reeds when the reeds grow to more than 1.5 meters, comprising the following steps:

[0062] B1. Plant 20 rows of reeds on improved soil, and keep the row spacing of reeds at 15 cm.

[0063] B2. When the reeds grow to more than 1.5 meters and become dense bushes, mix the spores of Dicranopteris dichotoma with fine soil and spread them between the rows of reeds, and then cover the mixture of straw segments and sawdust on the spread layer of Dicranopteris dichotoma spores to form a water-absorbing covering layer. The mass ratio of straw segments to sawdust is 1.4:1, and the length of the straw segments is 0.8 cm. The thickness of the water-absorbing covering layer is 2 cm, and the straw segments are rolled straw segments.

[0064] After sowing the reed seeds in the soil, water it every one day. After the reed germinates and grows leaf buds, water it every 3 to 4 days to promote the growth of the plant root system.

[0065] S30: After the dichotoma dichotoma germinates and grows leaf buds, spray the bacterial solution into the soil, and spray the binder solution 3 to 7 minutes after spraying the bacterial solution, and continue for 7 days.

[0066] The concentration of bacterial solution was 10 7 CFU / mL of Bacillus pasteurianus liquid, each liter of the cementing liquid includes 60g of calcium chloride, 50g of urea, and 0.45g of sodium chloride; the spraying amount of the bacterial liquid is 180mL / m 2 The spraying amount of the cementing liquid is 140mL / m 2.

[0067] Example 2

[0068] The method for restoring vegetation in disturbed areas in red soil of this embodiment was carried out in another test area, which was substantially the same as that in embodiment 1, except for step S30. In this embodiment, in step S30, the cementing solution contained 110 g of calcium chloride, 30 g of urea, and 0.45 g of sodium chloride per liter, and the spraying amount of the bacterial solution was 150 mL / m 2 The spraying amount of the cementing liquid is 140mL / m 2 .

[0069] Example 3

[0070] The method for restoring vegetation on disturbed land in red soil area of ​​this embodiment was carried out in another test area, which was substantially the same as that of embodiment 1, except for step S30. In step S30, the cementing solution contained 55g of calcium chloride, 60g of urea, and 0.3g of sodium chloride per liter, and the spraying amount of the bacterial solution was 50mL / m 2 The spraying amount of the cementing liquid is 30mL / m 2 .

[0071] Example 4

[0072] The method for restoring vegetation on disturbed land in red soil area of ​​this embodiment was carried out in another test area, which was substantially the same as that of embodiment 1, except for step B2, and the rest of the steps were the same. In step B2, the mass ratio of straw segments to sawdust was 1.2:1.

[0073] Example 5

[0074] The method for restoring vegetation on disturbed land in red soil area of ​​this embodiment was carried out in another test area, which was substantially the same as that of embodiment 1, except for step B2, and the rest of the steps were the same. In step B2, the mass ratio of straw segments to sawdust was 1.6:1.

[0075] Example 6

[0076] The method for restoring vegetation on disturbed land in red soil area of ​​this embodiment was carried out in another test area, which was substantially the same as that of embodiment 1, except for step B2, and the remaining steps were the same. In step B2, the water-absorbing cover layer was a non-woven fabric.

[0077] Example 7

[0078] The method for restoring vegetation on disturbed land in red soil area of ​​this embodiment was carried out in another test area, which was substantially the same as that of embodiment 1, except for step B2, and the remaining steps were the same. In step B2, no water-absorbing covering layer was provided.

[0079] Comparative Example 1

[0080] The method for restoring vegetation on disturbed land in red soil area of ​​this comparative example was carried out in another test area, which was substantially the same as that of Example 1, except for step B2, and the remaining steps were the same. In step B2, bacterial solution and cementing solution were not sprayed.

[0081] Comparative Example 2

[0082] The vegetation restoration method for disturbed red soil areas of this comparative example was carried out in another test area, which was substantially the same as that of Example 1, except for step S30. The remaining steps were the same. In step S30, the spraying rate of the bacterial solution was 30 mL / m 2 The spraying amount of the cementing liquid is 20mL / m 2 .

[0083] Comparative Example 3

[0084] The vegetation restoration method for disturbed red soil areas of this comparative example was carried out in another test area, which was substantially the same as that of Example 1, except for step S30. The remaining steps were the same. In step S30, the spraying rate of the bacterial solution was 250 mL / m 2 The spraying amount of the cementing liquid is 170mL / m 2 .

[0085] Comparative Example 4

[0086] The method for restoring vegetation on disturbed land in red soil area of ​​this comparative example was carried out in another test area, which was substantially the same as that of Example 1, except that step A2 was not carried out, and the remaining steps were the same.

[0087] The germination rate of the spores of Dicranopteris dichotoma in each embodiment and comparative example after 25 days of sowing, and the coverage rate of Dicranopteris dichotoma plants in autumn of that year were statistically analyzed. The results are shown in Table 1.

[0088]

[0089] It can be seen from Table 1 that the vegetation restoration method of each embodiment of the present application can significantly improve the germination rate and coverage rate of Dicranopteris dichotoma compared to the vegetation restoration method of the comparative example, thereby quickly completing vegetation restoration.

[0090] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A method for restoring vegetation on disturbed land in red soil areas, characterized in that: The following steps are involved: S1. adjusting the physical and chemical properties of the disturbed soil to target physical and chemical properties to obtain improved soil; the pH value of the target physical and chemical properties is 4.92 to 5.02; S2. Plant multiple rows of reeds in the improved soil. When the reeds grow to more than 1.5 meters, sow spores of Dicranopteris dichotoma in the gaps between the rows of reeds. S3. After the spores of Dicranopteris dichotoma grow leaf buds, spray the bacterial solution and the cementing solution into the soil in sequence for 3 to 5 days; The bacterial liquid is Bacillus pasteurianus liquid, and the spraying amount is 150-180 mL / m 2 The spraying amount of the cementing liquid is 110-140 mL / m 2 .

2. The method for restoring vegetation in disturbed areas of red soil according to claim 1, characterized in that: In step S1, the organic carbon content of the target physical and chemical properties is 3.35-3.46 g·kg -1 , the available nitrogen content is 25.67~26.89mg·kg -1 The available phosphorus content is 19.97-21.02 mg kg -1 , the content of available potassium is 27.84~29.43mg·kg -1 .

3. The method for restoring vegetation on disturbed land in red soil region according to claim 1, characterized in that: In step S3, the concentration of the Bacillus pasteurianus liquid is 10 6 ~10 7 CFU / mL, each liter of the cementing fluid includes 55-111 g of calcium chloride, 30-60 g of urea, and 0.4-0.5 g of sodium chloride.

4. The method for restoring vegetation in disturbed areas in red soil areas according to claim 1, characterized in that: In step S3, the step of sowing Dicranopteris dichotoma spores includes: mixing the Dicranopteris dichotoma spores and fine soil and sowing them together, covering them with a water-absorbing covering layer, and watering so that the soil surface is not dry until the Dicranopteris dichotoma spores grow leaf buds.

5. The method for restoring vegetation on disturbed land in red soil region according to claim 4, characterized in that: The water-absorbing covering layer is a mixture layer formed by straw segments and sawdust, the mass ratio of the straw segments to the sawdust in the mixture layer is 1.6-1.2:1, and the length of the straw segments is 0.5-1 cm.

6. The method for restoring vegetation on disturbed land in red soil region according to claim 5, characterized in that: The thickness of the water-absorbing covering layer is 2 to 3 centimeters.

7. The method for restoring vegetation on disturbed land in red soil region according to claim 4, characterized in that: The water-absorbing covering layer is a non-woven fabric layer.

8. The method for restoring vegetation on disturbed land in red soil region according to any one of claims 1 to 7, characterized in that: In step S2, the row spacing between the multiple rows of reeds is 10 to 15 centimeters.

9. The method for restoring vegetation on disturbed land in red soil region according to any one of claims 1 to 7, characterized in that: Step S1 includes the following steps: A1. Detect and analyze the physical and chemical indicators of the disturbed soil to determine the physical and chemical properties of the disturbed soil, wherein the physical and chemical properties include bulk density, water holding capacity, particle size, pH, available nitrogen content, available phosphorus content, available potassium content, and organic matter content; A2. Apply soil conditioners and soil water retainers to the disturbed soil until the target physical and chemical properties are achieved.

10. The method for restoring vegetation on disturbed land in red soil region according to claim 9, characterized in that: In step A2, the soil conditioner includes at least one of organic fertilizer, lime, and calcium magnesium phosphate fertilizer, and the soil water retaining agent includes at least one of polyacrylic acid-inorganic mineral type, polyacrylamide-inorganic type, and polyacrylic acid salt type.

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