Method for rejuvenating degraded forest

Abstract

The application relates to the technical field of ecological restoration, and particularly discloses a method for rejuvenating degraded forest trees. The method comprises the following steps: S1, selecting a site; S2, processing dead trees; S3, soil remediation; S4, filling a pit for the first time; S5, planting seedlings; and S6, post-treatment. The method has the advantages of improving the survival rate of newly planted seedlings and enhancing the restoration effect of degraded forests.

Description

Technical Field

[0001] This application relates to the field of ecological restoration technology, and more specifically, it relates to a method for the regeneration and rejuvenation of degraded forest trees. Background Technology

[0002] Degraded forests refer to forest stands that have experienced a significant decline in quality, weakened ecological, economic, and social benefits, loss of biodiversity, and loss of their primary forest functions due to a combination of natural and human factors. Many factors contribute to forest degradation, including excessive logging, inappropriate tree species selection for afforestation, severe weather events such as droughts, floods, and freezing temperatures, pests and diseases, forest fires, physiological over-maturity, and improper tending and management. Currently, there are three main methods for degraded forest restoration: reforestation, replanting, and clearing weeds and shrubs.

[0003] Reforestation is used to reforest stands in plantations where tree species selection is inappropriate, in natural forests where the target tree species is absent, and in stands affected by severe weather such as drought, floods, freezing, pests and diseases, forest fires, or physiological over-maturity. Replanting and reforestation are used to replace tree species in stands where the target tree species are sparsely distributed, damaged due to external factors, or where local site conditions are unsuitable. Weed and shrub removal is used to promptly clear weeds and shrubs from stands rich in the target tree species but where they severely interfere with the growth of young trees, promoting rapid growth of the target tree species.

[0004] Although the methods for restoring degraded forests mentioned above are well-established, due to factors such as geography, climate, and human activities, the trees have long growth cycles, the soil has a low mineral content, and the survival rate of replanted trees is low. As a result, the restoration effect of degraded forests is not ideal, and the phenomenon of forest degradation continues. Summary of the Invention

[0005] To improve the survival rate of newly planted seedlings and enhance the restoration effect of degraded forests, this application provides a method for rejuvenating and rejuvenating degraded forest trees, employing the following technical solution:

[0006] A method for rejuvenating and rejuvenating degraded forest trees includes the following steps:

[0007] S1. Site selection: Select degraded forest land with a dead branch rate of more than 65% that is mainly composed of pure or mixed forests of Xinjiang poplar, Qingpu poplar, Hebei poplar, Hupu poplar and white poplar with an age of more than 10 years.

[0008] S2. Dead tree treatment: In early April, remove dead trees from the degraded forest land, dig pits at the dead trees, and clear away dead branches and roots. The pits should be 80cm-110cm deep and 60cm-90cm in diameter.

[0009] S3, soil remediation: the pit and soil excavated in step S2 are exposed to the sun until late April; in early May, light carbon nuclear fertilizer and soil conditioner are scattered in the soil, and the mixture is mixed evenly, obtaining mixed soil, the weight ratio of soil, light carbon nuclear fertilizer and soil conditioner being 25-35:1-3:1;

[0010] S4, first filling of the pit: the treated mixed soil is backfilled into the pit to a depth of 50-60 cm, and grass seeds are scattered in the remaining mixed soil for standby;

[0011] S5, planting seedlings: cultivated seedlings with a height of 3.5-4 m are planted directly into the pit, and the remaining mixed soil is used to fill the pit for the second time, and the mixed soil is continuously tamped and compacted during filling, finally forming a mound around the tree base;

[0012] S6, later treatment: holes are dug at four cross-symmetric positions at a distance of 20-30 cm from the tree base, each hole is 30-50 cm deep, and 0.3-0.5 kg of light carbon nuclear fertilizer is placed in each hole and buried by backfilling soil.

[0013] By adopting the above technical scheme, the degraded forest of more than 10 years is selected, all dead seedlings are pulled out in early April, and the pits are dug to dispose of the dead branches and roots. The excavated soil is exposed to the sun and then light carbon nuclear fertilizer and soil conditioner are added and mixed evenly, and then backfilled into the pit. The soil conditioner can improve the soil quality, and the light carbon nuclear fertilizer can inhibit harmful bacteria, reduce soil pests and diseases, enhance soil permeability, improve root activity, promote photosynthesis, enrich soil minerals, enhance the resistance of seedlings, fully promote the gestation and growth of seedlings, and also can adsorb and passivate soil heavy metals and pesticide residues, and restore the original ecological quality of seedlings.

[0014] In addition, after backfilling part of the mixed soil into the pit, grass seeds are scattered in the remaining mixed soil, and after the seedlings are planted into the pit, the mixed soil with grass seeds is backfilled into the pit and tamped to form a mound. Since the grass seeds have relatively strong vitality, they can germinate and sprout in a short time. According to the characteristics of low height and developed root system of grass, the vegetation of the degraded forest can be quickly restored, which can play a role in water and fertilizer conservation, thereby providing a favorable environment for the growth of seedlings. Moreover, holes are dug around the tree base, and light carbon nuclear fertilizer is placed in the holes, which can further optimize the soil around the tree base, effectively inhibit pests, improve root activity, and make the seedlings grow more vigorously.

[0015] In summary, the activity of the soil can be effectively restored, the newly planted seedlings can obtain sufficient nutrients and grow vigorously, the survival rate of newly planted seedlings can be improved, the occurrence of forest degradation can be reduced, and the repair effect of the degraded forest is enhanced.

[0016] Preferably, the light carbon core fertilizer of step S3 comprises 0.5-3% of sodium carbonate, 2-4.5% of sodium bicarbonate, 5-15% of coke, 1-5% of bacillus subtilis, 1-8% of paste-like paenibacillus, 3-10% of fulvic acid, and the rest of organic matter.

[0017] By adopting the above technical scheme, since the core technology of the light carbon core fertilizer is to capture carbon dioxide in the air under the premise of not using chemical fertilizer and chemical pesticide, to make chlorophyll under the sunlight, to accumulate carbon, hydrogen and oxygen necessary for the growth of seedlings, to absorb, synthesize and transform organic components such as nitrogen, phosphorus and potassium in the soil, and to promote the gestation and growth of seedlings, the sodium carbonate and sodium bicarbonate in the present application can produce carbon dioxide in contact with air in the soil, to provide carbon for the root system of seedlings, and the root system of seedlings can deliver carbon to the stem and leaf parts of seedlings, and the stem and leaves can provide nutrient elements for seedlings through photosynthesis, so that the seedlings grow vigorously. The coke can be used as an adsorbent to absorb carbon dioxide gas released by sodium carbonate and sodium bicarbonate. The bacillus subtilis and paste-like paenibacillus can play the role of nitrogen fixation, phosphorus and potassium decomposition, and release of soluble calcium, sulfur, magnesium, zinc, molybdenum and manganese and other trace elements, which not only improves the soil fertility, but also provides nutrient elements that can be absorbed and utilized by seedlings.

[0018] Preferably, the dogtail grass, royal bamboo grass, wild alfalfa, and meadow grass of step S4 are used.

[0019] By adopting the above technical scheme, since such grasses have strong resistance to barren land and can grow rapidly in barren soil, they have strong vitality, can enrich the vegetation of degraded forests, play a role in water and fertilizer conservation, and can be used as pasture in the later growth stage of seedlings, which not only restores the ecology, but also does not interfere with the growth of young forests.

[0020] Preferably, the organic matter comprises lime, animal manure and discarded mushroom culture medium, and the weight ratio of the lime, animal manure and discarded mushroom culture medium is 1:3:1.

[0021] By adopting the above technical scheme, since the lime, animal manure and discarded mushroom culture medium are all natural fertilizers and do not contain any chemical components, they will not harm the environment, and the lime is rich in mineral elements contained in plants, which can inhibit harmful bacteria and provide mineral elements for seedlings, the animal manure and discarded mushroom culture medium are rich in nutrients, and the cost is low, realizing the utilization of waste.

[0022] Preferably, the soil type of the degraded forest land of step S1 is sandy saline-alkali soil, and the soil layer (0-50 cm) pH is 7.8-8.8, and the soil modifier of step S3 is a saline-alkali soil modifier.

[0023] By adopting the technical scheme, since most of the northern region of China belongs to arid, semi-arid and dry sub-humid regions, precipitation is less and evaporation is intense, so it is easy to cause soil salinization and form saline-alkali soil, the addition of the saline-alkali soil modifier in the saline-alkali soil can realize the improvement and repair of the soil by using the soil itself, improve the soil water and fertilizer retention capacity, and improve the disease resistance, drought resistance and stress resistance of the seedlings.

[0024] Preferably, the excavated soil in step S2 is exposed to the sun until mid-April, and a layer of lime is then spread and stirred evenly, with the ratio of soil to lime being 20:1.

[0025] By adopting the technical scheme, since lime has a sterilization effect, the addition of an appropriate amount of lime in the soil can effectively kill most pests in the soil and inhibit the growth and reproduction of pests, achieving the effects of pest control and pest elimination, and also shortening the soil sterilization time.

[0026] Preferably, the cultivated seedlings in step S5 include at least two of Xinjiang poplar, green poplar, Hebei poplar, poplar and white poplar, and the cultivated seedlings planted in the same pit are not of the same variety as the dead seedlings pulled out in step S2.

[0027] By adopting the technical scheme, since the cause of the degradation of the forest trees may be the mismatch between the site conditions and the biological characteristics of the seedlings in afforestation, the cultivated seedlings replanted in the same pit are different in variety from the previous dead seedlings, which can effectively solve the above problems, reduce the pathogenic organisms in the soil, balance the soil nutrient components, reduce the harm of the root residues of the original dead seedlings to the newly planted cultivated seedlings, and enhance the vitality of the cultivated seedlings.

[0028] Preferably, the soil obtained by digging the hole in step S6 is also exposed to the sun, and the hole is backfilled with grass seeds.

[0029] By adopting the technical scheme, since most of the soil in the degraded forest is threatened by pests and diseases, it is not practical and too costly to expose all the soil in the degraded forest to the sun, so the soil obtained by digging the hole around the tree base is also exposed to the sun, and the hole is backfilled with grass seeds, which can effectively kill the bacteria in the soil and also make the grass seeds germinate and sprout, further enriching the vegetation in the forest and realizing the vigorous growth of the cultivated seedlings.

[0030] In summary, the present application has the following beneficial effects:

[0031] 1. This application involves excavating soil, sun-drying it, adding photocarbon fertilizer and soil conditioner, mixing it evenly, and then backfilling it into the pit. After backfilling part of the mixed soil into the pit, grass seeds are sown into the remaining mixed soil. After the seedlings are planted in the pit, the mixed soil with sown grass seeds is backfilled into the pit. Holes are dug around the base of the tree, and photocarbon fertilizer is placed in the holes. This effectively restores the activity of the soil, allowing the newly planted seedlings to receive sufficient nutrients and grow vigorously. This improves the survival rate of newly planted seedlings, reduces the occurrence of forest degradation, and enhances the restoration effect of degraded forests.

[0032] 2. In this application, photocarbon nuclear fertilizer is preferred. Sodium carbonate and sodium bicarbonate in the photocarbon nuclear fertilizer can produce carbon dioxide when they come into contact with air in the soil, providing carbon for the seedling roots. The seedling roots then transport the carbon to the stems and leaves of the seedling. The stems and leaves provide nutrients to the seedling through photosynthesis, thereby enabling the seedling to grow vigorously. Meanwhile, coke can act as an adsorbent to absorb the carbon dioxide gas released by sodium carbonate and sodium bicarbonate.

[0033] 3. The method of this application involves sowing early seeds in soil that has been exposed to the sun and treated. Because the selected grass has a strong tolerance to poor soil, it can grow rapidly in poor soil, enriching the vegetation of degraded forests, playing a role in water and fertilizer retention, and can also be used as pasture in the later stage of seedling growth. This restores the ecology without interfering with the growth of young forests. Detailed Implementation

[0034] The present application will be further described in detail below with reference to embodiments and comparative examples.

[0035] Example

[0036] Example 1

[0037] A method for rejuvenating and rejuvenating degraded forest trees includes the following steps:

[0038] S1. Site selection: Select degraded forest land with a dead branch rate of more than 65% and consisting of pure or mixed forests mainly composed of Xinjiang poplar, Qingpu poplar, Hebei poplar, Hupu poplar and Maobai poplar, which are more than 10 years old; the soil type of the degraded forest land is sandy saline-alkali soil with a soil layer (0-50cm) pH of 7.8, and the soil conditioner is a saline-alkali soil conditioner.

[0039] S2. Dead Tree Treatment: In early April, remove dead trees from the degraded forest land and dig pits at the dead tree sites, clearing away dead branches and roots. The pits should be 80cm deep and 60cm in diameter. The excavated soil should be exposed to the sun until mid-April, then sprinkle a layer of quicklime on it and mix it evenly. The ratio of soil to quicklime should be 20:1.

[0040] S3, soil remediation: the pit and soil dug out in step S2 are exposed to the sun until late April; in early May, light carbon core fertilizer and soil conditioner are scattered in the soil, and the mixture is mixed evenly to obtain mixed soil, the weight ratio of soil, light carbon core fertilizer and soil conditioner being 25:1:1; the light carbon core fertilizer comprises 0.5% sodium carbonate, 2% sodium bicarbonate, 5% coke, 1% bacillus subtilis, 1% gelatin-like paenibacillus, 3% fulvic acid and the rest organic matter. The organic matter comprises lime ash, animal manure and discarded mushroom culture medium, and the weight ratio of the lime ash, animal manure and discarded mushroom culture medium is 1:3:1.

[0041] S4, first pit filling: the treated mixed soil is backfilled in the pit to a depth of 50 cm, and grass seeds are scattered in the remaining mixed soil for standby; the grass seeds comprise dogtail grass seeds, royal bamboo grass seeds, wild alfalfa seeds, esparto and anemarrhena asphodeloides.

[0042] S5, seedling planting: cultivated tree seedlings with a height of 3.5 m are selected and planted straight into the pit, the remaining mixed soil is used for secondary pit filling, and the mixed soil is continuously tamped and compacted during pit filling, and finally a hill-shaped structure is formed around the tree base; the cultivated tree seedlings comprise at least two of Xinjiang poplar, Chinese white poplar, Hebei poplar, populus euphratica and populus tomentosa, and the cultivated tree seedlings planted in the same pit are not of the same species as the dead trees pulled out in step S2.

[0043] S6, later treatment: holes are dug at four cross-symmetric positions at a distance of 20 cm from the tree base, the hole depth is 30 cm, 0.3 kg of light carbon core fertilizer is placed in each hole, and the soil is backfilled for burial. The soil obtained by digging the holes is also exposed to the sun, and the holes are backfilled with grass seeds.

[0044] Example 2

[0045] A method for rejuvenating and renewing trees in degraded forests, comprising the following steps:

[0046] S1, site selection: selecting a pure forest or mixed forest of Xinjiang poplar, Chinese white poplar, Hebei poplar, populus euphratica and populus tomentosa with an age of more than 10 years, and a degraded forest land with a branch death rate of more than 65%; the soil type of the degraded forest land is sandy saline-alkali soil, the soil layer (0-50 cm) pH is 8.8, and the soil conditioner is a saline-alkali soil conditioner.

[0047] S2, dead tree treatment: in early April, the dead trees in the degraded forest land are pulled out, and pits are dug at the positions of the dead trees, the dead branches and roots are cleaned, the pit depth is 110 cm, and the pit diameter is 90 cm; the dug soil is exposed to the sun until mid-April, a layer of lime is scattered and mixed evenly, and the ratio of soil to lime is 20:1.

[0048] S3, soil remediation: the pit and soil dug out in step S2 are exposed to the sun until late April; in early May, light carbon core fertilizer and soil conditioner are scattered in the soil, and the mixture is mixed evenly to obtain mixed soil, the weight ratio of the soil, light carbon core fertilizer and soil conditioner being 35:3:1; the light carbon core fertilizer comprises 3% sodium carbonate, 4.5% sodium bicarbonate, 15% coke, 5% bacillus subtilis, 8% gelatin-like paenibacillus, 10% fulvic acid and the rest organic matter. The organic matter comprises lime ash, animal manure and discarded mushroom culture medium, and the weight ratio of the lime ash, animal manure and discarded mushroom culture medium is 1:3:1.

[0049] S4, first pit filling: the treated mixed soil is backfilled in the pit to a depth of 60 cm, and grass seeds are scattered in the remaining mixed soil for standby; the grass seeds comprise dogtail grass seeds, royal bamboo grass seeds, wild alfalfa seeds, esparto and anemarrhena asphodeloides.

[0050] S5, seedling planting: cultivated tree seedlings with a height of 4 m are selected and planted straight into the pit, the remaining mixed soil is used for secondary pit filling, and the mixed soil is continuously tamped and compacted during pit filling, and finally a hill shape is formed around the tree base; the cultivated tree seedlings comprise at least two of Xinjiang poplar, Chinese white poplar, Hebei poplar, populus euphratica and populus tomentosa, and the cultivated tree seedlings planted in the same pit are not of the same species as the dead trees pulled out in step S2.

[0051] S6, later treatment: holes are dug at four cross-symmetric positions at a distance of 30 cm from the tree base, the hole depth is 50 cm, 0.5 kg of light carbon core fertilizer is placed in each hole, and the soil is backfilled for burial. The soil obtained by digging the holes is also exposed to the sun, and grass seeds are backfilled in the holes.

[0052] Example 3

[0053] A method for rejuvenating and renewing trees in degraded forests, comprising the following steps:

[0054] S1, site selection: selecting a pure forest or mixed forest of Xinjiang poplar, Chinese white poplar, Hebei poplar, populus euphratica and populus tomentosa as the main species, and a degraded forest land with a branch death rate of more than 65%; the soil type of the degraded forest land is sandy saline-alkali soil, the soil layer (0-50 cm) pH is 8.3, and the soil conditioner is a saline-alkali soil conditioner.

[0055] S2, dead tree treatment: in early April, the dead trees in the degraded forest land are pulled out, and a pit is dug at the position of the dead trees, the dead branches and roots are cleaned up, the pit depth is 95 cm, and the pit diameter is 75 cm; the dug soil is exposed to the sun until mid-April, a layer of lime is scattered and mixed evenly, and the ratio of the soil to lime is 20:1.

[0056] S3, soil remediation: the pit and soil excavated in step S2 are exposed to the sun until late April; in early May, light carbon nuclear fertilizer and soil conditioner are added to the soil and mixed evenly, to obtain mixed soil, the weight ratio of the soil, light carbon nuclear fertilizer and soil conditioner being 30:2:1; the light carbon nuclear fertilizer comprises 1.5% sodium carbonate, 3.2% sodium bicarbonate, 10% coke, 3% bacillus subtilis, 4.5% gelatin-like paenibacillus, 6.5% fulvic acid and the rest organic matter. The organic matter comprises lime ash, animal manure and discarded mushroom culture medium, the weight ratio of the lime ash, animal manure and discarded mushroom culture medium being 1:3:1.

[0057] S4, first pit filling: the treated mixed soil is backfilled into the pit to a depth of 55 cm, and grass seeds are added to the remaining mixed soil for later use; the grass seeds comprise Setaria viridis seeds, Eulaliopsis binata seeds, Melica princeps seeds and Anemarrhena asphodeloides seeds.

[0058] S5, seedling planting: cultivated tree seedlings with a height of 3.7 m are planted directly into the pit, and the remaining mixed soil is used to fill the pit again, and the mixed soil is continuously tamped and compacted during the filling process, finally forming a mound around the tree base; the cultivated tree seedlings comprise at least two of Populus alba var. pyramidalis, Populus cathayana, Populus hopeiensis, Populus euphratica and Populus tomentosa, and the cultivated tree seedlings planted in the same pit are not of the same species as the dead trees pulled out in step S2.

[0059] S6, later treatment: holes are dug at four cross-symmetric positions 25 cm away from the tree base, with a depth of 40 cm, and 0.4 kg of light carbon nuclear fertilizer is placed in each hole, which is then backfilled with soil. The soil obtained by digging the holes is also exposed to the sun, and grass seeds are added and backfilled into the holes.

[0060] Comparative Example 1

[0061] Comparative Example 1

[0062] The difference from Example 2 is that no light carbon nuclear fertilizer is added to the soil after exposure to the sun, but holes are dug at four cross-symmetric positions 25 cm away from the tree base, with a depth of 40 cm, and 0.4 kg of light carbon nuclear fertilizer is placed in each hole, which is then backfilled with soil.

[0063] Comparative Example 2

[0064] The difference from Example 2 is that the same amount of light carbon nuclear fertilizer is added to the soil after exposure to the sun, but no holes are dug around the tree base to place the light carbon nuclear fertilizer.

[0065] Comparative Example 3

[0066] The difference from Example 2 is that no soil conditioner is added to the soil after exposure to the sun.

[0067] Comparative Example 4

[0068] The difference from Example 2 is that no grass seeds are added to the soil after exposure to the sun.

[0069] Performance detection test

[0070] Test method

[0071] A plurality of degraded forest lands in the same area are selected, and seedlings are planted and cultivated according to the method in the above examples and comparative examples, and the survival rate of the seedlings is observed and recorded for three consecutive years (survival rate = the survival amount of seedlings in the area in the current year / the number of seedlings initially planted in the area). Three parallel tests are performed for each test group, and the average value is taken.

[0072] Table 1: Survival amount statistics of degraded forest seedlings

[0073]

[0074]

[0075] It can be seen from Examples 1, 2 and 3 and Table 1 that adding light carbon core fertilizer and soil conditioner to the backfill pit in the soil after exposure to the sun, and scattering grass seeds into the remaining mixed soil for backfilling, as well as digging holes around the tree base and placing light carbon core fertilizer in the holes, can effectively improve the soil quality, increase the survival rate of newly planted seedlings, and enhance the repair effect of degraded forests.

[0076] It can be seen from Example 2 and Comparative Example 1 and Table 1 that the survival rate of seedlings in degraded forests is significantly reduced when light carbon core fertilizer is not added to the soil after exposure to the sun, and it can be seen from Comparative Example 2 that the survival rate of seedlings in degraded forests is also significantly reduced when light carbon core fertilizer is not placed in the holes around the tree base, which indicates that light carbon core fertilizer plays a certain role, can effectively improve soil permeability, enrich soil minerals, and enhance the resistance of seedlings, promoting the development and growth of seedlings.

[0077] It can be seen from Comparative Example 3 and Table 1 that the survival rate of seedlings in degraded forests is also reduced when no soil conditioner is added to the soil after exposure to the sun, which indicates that the soil conditioner can effectively improve the soil quality, improve the soil water and fertilizer retention capacity, and improve the disease resistance, drought resistance and stress resistance of seedlings.

[0078] It can be seen from Comparative Example 4 and Table 1 that the survival rate of seedlings in degraded forests is also reduced when no grass seeds are added to the soil after exposure to the sun, which to some extent indicates that the addition of grass seeds to the soil and then backfilling, and the growth of grass seeds can enrich the vegetation of degraded forests, play a role in water and fertilizer conservation, and thus provide a favorable environment for the growth of seedlings.

[0079] The embodiments are only illustrative of the present application, and are not intended to limit the present application, and those skilled in the art can make modifications to the embodiments without creative contribution after reading the specification, but as long as the modifications are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A method for rejuvenation of degraded forest by regenerating trees, characterized in that, The method comprises the following steps: S1, selecting: selecting pure forest or mixed forest of Populus alba, Populus cathayana, Populus hopeiensis, Populus euphratica and Populus tomentosa with more than 10 years of age and degradation forest land with more than 65% of dead branch rate; S2, dead wood treatment: in early April, the dead trees in the degradation forest land are pulled out, and pits are dug at the dead trees, the dead branches and roots are cleaned, the pit depth is 80cm-110cm, and the pit diameter is 60cm-90cm; S3, soil repair: the pits and soil dug in step S2 are exposed to the sun until late April; in early May, light carbon core fertilizer and soil conditioner are scattered in the soil, mixed uniformly, and mixed soil is obtained, and the weight ratio of soil, light carbon core fertilizer and soil conditioner is 25-35:1-3:1; S4, first pit filling: the mixed soil treated is backfilled in the pit to a depth of 50cm-60cm, and grass seeds are scattered in the remaining mixed soil for standby; S5, seedling planting: the cultivated seedlings with a height of 3.5m-4m are selected and planted vertically into the pit, the remaining mixed soil is used for secondary pit filling, and the mixed soil is continuously tamped and compacted during pit filling, and finally a hill-shaped structure is formed around the tree base; S6, later treatment: holes are dug at four cross-symmetric positions at a distance of 20cm-30cm from the tree base, the hole depth is 30cm-50cm, 0.3kg-0.5kg of light carbon core fertilizer is placed in each hole, and the soil is backfilled for burial; The light carbon core fertilizer comprises 0.5%-3% sodium carbonate, 2%-4.5% sodium bicarbonate, 5%-15% coke, 1%-5% bacillus subtilis, 1%-8% gelatin-like paenibacillus, 3%-10% fulvic acid and organic matter; The organic matter comprises lime ash, animal manure and discarded mushroom culture material, and the weight ratio of the lime ash, animal manure and discarded mushroom culture material is 1:3:

1.

2. The method for rejuvenation of degraded forest according to claim 1, wherein, The grass seeds in step S4 comprise Setaria viridis seeds, Oligostachyum lubricum seeds, Medicago falcata seeds, Cleistogenes squarrosa and Anemarrhena asphodeloides.

3. The method for rejuvenation of degraded forest according to claim 1, wherein, The soil type of the degradation forest land in step S1 is sandy saline-alkali soil, the pH of the 0-50cm soil layer is 7.8-8.8, and the soil conditioner in step S3 is a saline-alkali soil conditioner.

4. The method for rejuvenation of degraded forest according to claim 1, wherein, The soil dug in step S2 is exposed to the sun until mid-April, a layer of lime is scattered and stirred uniformly, and the ratio of soil to lime is 20:

1.

5. The method for rejuvenation of degraded forest according to claim 1, wherein, The cultivated seedlings in step S5 comprise at least two of Populus alba, Populus cathayana, Populus hopeiensis, Populus euphratica and Populus tomentosa, and the cultivated seedlings planted in the same pit are not of the same variety as the dead trees pulled out in step S2.

6. The method for rejuvenation of degraded forest according to claim 1, wherein, The soil obtained by digging holes in step S6 is also exposed to the sun, and the hole is backfilled with grass seeds.

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