Sandy land restoration method based on multispecies configuration of herba violae compound and shrub and grass

Abstract

The invention relates to the technical field of sand stabilization, in particular to a sand land restoration method based on the configuration of multiple species such as a herba violae compound and shrub and grass, and the sand land restoration method comprises the following steps: S1, applying a water-retaining agent on the surface of a to-be-treated sand land; s2, a herba violae compound is sprayed, and formation of biological soil crust is promoted; s3, the surface of the sand land is covered with a sunshade net; wherein the herba lysimachiae compound is prepared from herba lysimachiae, plant seeds and a compound microorganism growth promoting agent; the compound microorganism growth promoting agent is prepared from trehalose, glycerol, monopotassium phosphate, ferrous sulfate heptahydrate, EDTA (Ethylene Diamine Tetraacetic Acid) disodium, sodium molybdate and glycine betaine. According to the method, a biological crust technology and multi-species vegetation configuration are combined, the sand surface can be rapidly fixed, wind erosion can be resisted, soil nutrients and biological activity can be gradually improved, forward succession of an ecological system is promoted, and the method has the advantages of being low in cost, environmentally friendly, continuous in ecological benefit and the like.

Description

Technical Field

[0001] This invention relates to the field of sand fixation technology, specifically to a method for sand restoration based on a combination of moss complex and multiple species of shrubs and grasses. Background Technology

[0002] Desertification is one of the most serious ecological and environmental problems facing the world today, leading to declining land productivity, frequent sandstorms, and seriously threatening regional ecological security and sustainable economic and social development. In the management of mobile and semi-mobile sand dunes, the core technical challenge lies in how to quickly stabilize the sand surface, restore vegetation, and rebuild ecosystem functions.

[0003] Traditional physical and chemical sand-fixing techniques (such as laying straw checkerboards and spraying chemical sand-fixing agents) can stabilize the sand surface in the short term, but they are usually costly, the materials are non-degradable, and they cannot fundamentally improve soil fertility and biological activity, resulting in limited ecological benefits. Therefore, biological sand-fixing techniques aimed at restoring the functions of the ecosystem are receiving increasing attention, among which biological soil crusting technology and plant sand-fixing technology are two main approaches. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention discloses a method for sandy land remediation based on a combination of sphagnum moss complexes and multi-species shrubs and grasses. The bio-soil crust possesses the advantages of stabilizing the sand surface, improving soil fertility, resisting wind erosion, and exhibiting strong adaptability to extreme adversity. Through the design of a multi-layered vegetation structure, a multi-layered vegetation community is formed, which can increase ground cover, enhance plant community stability, and improve ecosystem function. The mixed remediation of bio-soil crusts and sand-fixing plants can compensate for the inability of vegetation to completely cover the sand surface after planting, improving the microclimate level of the planting area, enhancing species diversity, and accelerating the sustainability and stability of ecological restoration. Shading netting can block some sunlight, preventing plants from being scorched by direct sunlight, which helps to inhibit soil moisture loss and improve soil moisture content. Simultaneously, the shading netting stabilizes the sand surface and promotes the development of bio-soil crusts. Water-retaining agents can enhance the soil's water retention capacity, especially during dry seasons, significantly inhibiting soil moisture loss and providing more water support for plants. Details are as follows: A method for sandy land remediation based on a combination of sphagnum moss complexes and multi-species shrubs and grasses includes the following steps: S1. Apply a water-retaining agent to the surface of the sandy land to be treated; S2, spraying sphagnum moss compound promotes the formation of biological soil crust; S3. Cover the sandy surface with shade netting; The bryophyte complex contains silver leaf bryophyte, plant seeds, and a compound microbial growth promoter; The compound microbial growth promoter is composed of trehalose, glycerol, potassium dihydrogen phosphate, ferrous sulfate heptahydrate, disodium EDTA, sodium molybdate, and glycine betaine.

[0005] Moreover, the method for obtaining the silver leaf true sphagnum moss is as follows: collect the bark of silver leaf true sphagnum moss, dry it in the shade, grind it into a fine soil-like state, and filter and mix it through a soil sieve with a pore size of 0.1mm.

[0006] Furthermore, the preparation method of the compound microbial growth promoter is as follows: (1) Weigh out 30-80 grams of trehalose, 60-80 ml of glycerol, 5-10 grams of potassium dihydrogen phosphate, 3-5 grams of ferrous sulfate heptahydrate, 0.2-0.4 grams of sodium molybdate, and 10-30 grams of glycine betaine; (2) Dissolve the above ingredients in deionized water in sequence and stir until completely dissolved; (3) Add 0.1-0.3 g of disodium EDTA and continue stirring until well mixed; (4) Make up to 100 liters with deionized water to obtain the compound microbial growth promoter.

[0007] Furthermore, based on the mass ratio, the mixture of *Bryum spp.*, plant seeds, and compound microbial growth promoter (15-25):(2-3):(1-2) is used to form a suspension.

[0008] Moreover, during the formation of biological soil crust and the seedling stage, the shading rate of the shade net is 60%-80%; after the vegetation enters the stable growth period, the shading rate of the shade net decreases to 20%-40%.

[0009] Moreover, in step S1, the water-retaining agent is an agricultural and forestry water-retaining agent (provided by Zhongshan Zhenlin New Materials Co., Ltd.); the dosage of the water-retaining agent is 3-5 kg / mu, and the water-retaining agent is applied directly to the land, mixed evenly with the soil, and then watered.

[0010] Moreover, the application rate of the moss compound is 150-250g per square meter of sandy land.

[0011] Moreover, the seeds of the plant are shrubs and herbs; among them, the shrubs are Lespedeza bicolor, Caragana korshinskii, Tamarinus chinensis, and Salix babylonica; the herbs are Amaranthus praecox, Leymus chinensis, Bromus scabra, Leymus chinensis, Leymus chinensis, Poa annua, and Poa spp.

[0012] Furthermore, based on the mass ratio, the ratio of shrubs to herbs is: Shrubs: Lespedeza 5%, Caragana korshinskii 25%, Tamarix chinensis 8%, Salix babylonica 10%; Herbs: 5% Sophora flavescens, 5% Leymus chinensis, 10% Bromus scabra, 5% Leymus chinensis, 8% Agropyron cristatum, 4% Poa annua, 8% Sorghum spp.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Compared with traditional physical / chemical sand fixation methods (such as straw checkerboards and chemical binders), this invention mainly relies on renewable biological materials such as soil crust and local plant species. The material cost is relatively low, and there is no chemical pollution, making it environmentally friendly. This method not only achieves sand surface fixation, but more importantly, it initiates positive succession from soil to biological systems, enhancing the self-sustaining and recovery capacity of the ecosystem. Its ecological benefits are long-term and sustainable, avoiding the need for repeated maintenance or potential ecological side effects of traditional methods.

[0014] 2. This invention employs a scientific planting ratio of shrubs and herbs to construct a multi-layered vegetation structure, which not only improves ground cover and diversity but also enhances the stability and resilience of the community by forming a solidified network in the soil through the root system. This effectively prevents ecological risks caused by the degradation of a single species and accelerates the evolution towards a stable ecosystem.

[0015] 3. This invention promotes the growth of silverleaf bryophyte and plants by spraying a bryophyte complex and using a compound microbial growth promoter, thereby improving the soil microenvironment, promoting the development of microbial communities, fundamentally enhancing soil fertility and biological activity, and providing continuous support for plant establishment and growth.

[0016] 4. The vegetation cover increased by 88.04% and the species richness increased by 56.6% compared with the control using the technical solution of the present invention, which proves that the method can greatly promote the early settlement and rapid coverage of vegetation on sandy land, and win critical time for ecological restoration.

[0017] 5. Community surveys show that in the plant communities treated with this invention (T3), the importance values ​​of pioneer dominant species, such as foxtail grass, relatively decreased, and the ecological dominance among species became more balanced. Simultaneously, perennial herbs (such as Leymus chinensis) began to occupy important ecological niches, marking the community's evolution from a simple pioneer stage to a more complex and stable stage, and enhancing the ecosystem's resilience. Attached Figure Description

[0018] Figure 1 Comparison of species richness in groups T0-T7; Figure 2 Comparison of vegetation cover for groups T0-T7; Figure 3 Comparison of the number of vegetation individuals in groups T0-T7; Figure 4 Comparison of vegetation height for groups T0-T7. Detailed Implementation

[0019] Example 1 A method for sandy land remediation based on a combination of sphagnum moss complexes and multi-species shrubs and grasses includes the following steps: S1. Apply a water-retaining agent to the surface of the sandy land to be treated; S2, spraying sphagnum moss compound promotes the formation of biological soil crust; S3. Cover the sandy surface with shade netting; The bryophyte complex contains silver leaf bryophyte, plant seeds, and a compound microbial growth promoter; The compound microbial growth promoter is composed of trehalose, glycerol, potassium dihydrogen phosphate, ferrous sulfate heptahydrate, disodium EDTA, sodium molybdate, and glycine betaine.

[0020] Furthermore, the method for obtaining the silver leaf moss is as follows: collect the bark of silver leaf moss, dry it in the shade, grind it into a fine soil-like state, and filter and mix it through a soil sieve with a pore size of 0.1 mm.

[0021] Furthermore, the preparation method of the compound microbial growth promoter is as follows: (1) Weigh out 80g of trehalose, 80ml of glycerol, 10g of potassium dihydrogen phosphate, 5g of ferrous sulfate heptahydrate, 0.4g of sodium molybdate, and 30g of glycine betaine; (2) Dissolve the above ingredients in deionized water in sequence and stir until completely dissolved; (3) Add 0.3 g of disodium EDTA and continue stirring until well mixed; (4) Make up to 100 liters with deionized water to obtain the compound microbial growth promoter.

[0022] Furthermore, based on the mass ratio, the mixture of *Bryum spp.*, plant seeds, and compound microbial growth promoter is 25:3:2 to form a suspension before use.

[0023] Furthermore, during the soil crust formation period and the seedling stage, the shading rate of the shade net is 60%-80%; after the vegetation enters a stable growth period, the shading rate of the shade net decreases to 20%-40%.

[0024] Furthermore, in step S1, the water-retaining agent is an agricultural and forestry water-retaining agent; the dosage of the water-retaining agent is 5 kg / mu, and the water-retaining agent is directly applied to the land, mixed evenly with the soil, and then watered.

[0025] Furthermore, the application rate of the moss compound is 250g per square meter of sandy land.

[0026] Furthermore, the plant seeds are shrubs and herbs; among which, the shrubs are Lespedeza bicolor, Caragana korshinskii, Tamarix chinensis, and Salix babylonica; the herbs are Amaranthus praecox, Leymus chinensis, Bromus scabra, Leymus chinensis, Leymus chinensis, Poa annua, and Poa spp.

[0027] Furthermore, based on the mass ratio, the ratio of shrubs to herbs is: Shrubs: Lespedeza 5%, Caragana korshinskii 25%, Tamarix chinensis 8%, Salix babylonica 10%; Herbs: 5% Sophora flavescens, 5% Leymus chinensis, 10% Bromus scabra, 5% Leymus chinensis, 8% Agropyron cristatum, 4% Poa annua, 8% Sorghum spp.

[0028] Example 2 A method for sandy land remediation based on a combination of sphagnum moss complexes and multi-species shrubs and grasses includes the following steps: S1. Apply a water-retaining agent to the surface of the sandy land to be treated; S2, spraying sphagnum moss compound promotes the formation of biological soil crust; S3. Cover the sandy surface with shade netting; The bryophyte complex contains silver leaf bryophyte, plant seeds, and a compound microbial growth promoter; The compound microbial growth promoter is composed of trehalose, glycerol, potassium dihydrogen phosphate, ferrous sulfate heptahydrate, disodium EDTA, sodium molybdate, and glycine betaine.

[0029] Furthermore, the method for obtaining the silver leaf moss is as follows: collect the bark of silver leaf moss, dry it in the shade, grind it into a fine soil-like state, and filter and mix it through a soil sieve with a pore size of 0.1 mm.

[0030] Furthermore, the preparation method of the compound microbial growth promoter is as follows: (1) Weigh out 30g of trehalose, 60ml of glycerol, 5g of potassium dihydrogen phosphate, 3g of ferrous sulfate heptahydrate, 0.2g of sodium molybdate, and 10g of glycine betaine; (2) Dissolve the above ingredients in deionized water in sequence and stir until completely dissolved; (3) Add 0.1 g of disodium EDTA and continue stirring until well mixed; (4) Make up to 100 liters with deionized water to obtain the compound microbial growth promoter.

[0031] Furthermore, based on the mass ratio, the mixture of silver leaf moss: plant seeds: compound microbial growth promoter = 15:2:1 is used to form a suspension.

[0032] Furthermore, during the soil crust formation period and the seedling stage, the shading rate of the shade net is 60%; after the vegetation enters a stable growth period, the shading rate of the shade net decreases to 20%.

[0033] Furthermore, in step S1, the water-retaining agent is an agricultural and forestry water-retaining agent; the dosage of the water-retaining agent is 3 kg / mu, and the water-retaining agent is directly applied to the land, mixed evenly with the soil, and then watered.

[0034] Furthermore, the application rate of the moss compound is 150g per square meter of sandy land.

[0035] Furthermore, the plant seeds are shrubs and herbs; among which, the shrubs are Lespedeza bicolor, Caragana korshinskii, Tamarix chinensis, and Salix babylonica; the herbs are Amaranthus praecox, Leymus chinensis, Bromus scabra, Leymus chinensis, Leymus chinensis, Poa annua, and Poa spp.

[0036] Furthermore, based on the mass ratio, the ratio of shrubs to herbs is: Shrubs: Lespedeza 5%, Caragana korshinskii 25%, Tamarix chinensis 8%, Salix babylonica 10%; Herbs: 5% Sophora flavescens, 5% Leymus chinensis, 10% Bromus scabra, 5% Leymus chinensis, 8% Agropyron cristatum, 4% Poa annua, 8% Sorghum spp.

[0037] Example 3 A method for sandy land remediation based on a combination of sphagnum moss complexes and multi-species shrubs and grasses includes the following steps: S1. Apply a water-retaining agent to the surface of the sandy land to be treated; S2, spraying sphagnum moss compound promotes the formation of biological soil crust; S3. Cover the sandy surface with shade netting; The bryophyte complex contains silver leaf bryophyte, plant seeds, and a compound microbial growth promoter; The compound microbial growth promoter is composed of trehalose, glycerol, potassium dihydrogen phosphate, ferrous sulfate heptahydrate, disodium EDTA, sodium molybdate, and glycine betaine.

[0038] Furthermore, the method for obtaining the silver leaf moss is as follows: collect the bark of silver leaf moss, dry it in the shade, grind it into a fine soil-like state, and filter and mix it through a soil sieve with a pore size of 0.1 mm.

[0039] Furthermore, the preparation method of the compound microbial growth promoter is as follows: (1) Weigh out 50g of trehalose, 70ml of glycerol, 8g of potassium dihydrogen phosphate, 4g of ferrous sulfate heptahydrate, 0.3g of sodium molybdate, and 10-30g of glycine betaine; (2) Dissolve the above ingredients in deionized water in sequence and stir until completely dissolved; (3) Add 0.2 g of disodium EDTA and continue stirring until well mixed; (4) Make up to 100 liters with deionized water to obtain the compound microbial growth promoter.

[0040] Furthermore, based on the mass ratio, the mixture of *Bryum spp.*, plant seeds, and compound microbial growth promoter is prepared in a ratio of 20:2.5:1.5 and used to form a suspension.

[0041] Furthermore, during the soil crust formation period and the seedling stage, the shading rate of the shade net is 60%-80%; after the vegetation enters a stable growth period, the shading rate of the shade net decreases to 30%.

[0042] Furthermore, in step S1, the water-retaining agent is an agricultural and forestry water-retaining agent; the dosage of the water-retaining agent is 4 kg / mu, and the water-retaining agent is directly applied to the land, mixed evenly with the soil, and then watered.

[0043] Furthermore, the application rate of the moss compound is 200g per square meter of sandy land.

[0044] Furthermore, the plant seeds are shrubs and herbs; among which, the shrubs are Lespedeza bicolor, Caragana korshinskii, Tamarix chinensis, and Salix babylonica; the herbs are Amaranthus praecox, Leymus chinensis, Bromus scabra, Leymus chinensis, Leymus chinensis, Poa annua, and Poa spp.

[0045] Furthermore, based on the mass ratio, the ratio of shrubs to herbs is: Shrubs: Lespedeza 5%, Caragana korshinskii 25%, Tamarix chinensis 8%, Salix babylonica 10%; Herbs: 5% Sophora flavescens, 5% Leymus chinensis, 10% Bromus scabra, 5% Leymus chinensis, 8% Agropyron cristatum, 4% Poa annua, 8% Sorghum spp.

[0046] Experimental Section Experiment 1 Before planting, a water-retaining agent was applied, and the sphagnum moss compound was sprayed onto the sand surface to promote the formation of a biocrust. The area was then covered with a shade net. Each treatment was replicated in triplicate, with a quadrat size of 1×1m.

[0047] T0, No human intervention is required: Contrast of mobile sand dunes; T1, the sphagnum moss complex does not contain compound microbial growth promoters: Biological soil crust (without compound microbial growth promoter) + water-retaining agent + shade net + shrub and grass mixture of Example 3 (2500g). T2, without applying a water-retaining agent: Biological soil crust + shade net + shrub and grass mixture of Example 3 (2500g). T3. Complete technical solution of the present invention: Biological soil crust + water-retaining agent + shade net + shrub and grass mixture of Example 3 (2500g). T4, Sow only 4 types of shrubs, do not sow herbs: Biological soil crust + water-retaining agent + shade net + shrubs (Lespedeza bicolor 10.42%, Caragana korshinskii 52.08%, Tamarix chinensis 16.67%, Salix babylonica 20.83%, 2500g); T5: Sow only 8 types of herbs, do not sow shrubs: Biological soil crust + water-retaining agent + shade net + herbaceous plants (9.62% alfalfa, 9.62% crested wheatgrass, 9.23% awnless bromegrass, 9.62% rough clematis, 9.62% lysimachia, 15.38% argali, 7.69% Kentucky bluegrass, 15.38% sage rice, 2500g); T6, Interchange of sapling and grass ratio (sapling 52% : grass 48%): Biological soil crust + water-retaining agent + shade net + shrubs and grasses (shrubs: Lespedeza 5.42%, Caragana korshinskii 27.08%, Tamarix chinensis 8.67%, Salix babylonica 10.83%; herbs: Alternaria alternifolia 4.62%, Leymus chinensis 4.62%, Bromus spp. 9.23%, Clematis armandii 4.62%, Leymus chinensis 4.62%, Agropyron cristatum 7.38%, Poa annua 3.69%, Amaryllis 7.38%, 2500g); T7. Without shade netting: Biological soil crust + water-retaining agent + the ratio of irrigation and grass in Example 3 (2500g).

[0048] The vegetation growth effect was observed after 8 months. Figure 1-4 As can be seen from the figure, group T3 performed well or was balanced in key indicators such as vegetation cover, species richness, vegetation height, and number of individuals: T3 had the highest vegetation cover (27.67%) and species richness (5.33) among all treatment groups, fully demonstrating the synergistic effect of water-retaining agent, compound microbial growth promoter, shade net, and multi-species ratio of shrubs and grasses; although T1 had a slightly higher number of individuals (56.33) than T3 (51.67), its cover (26.00%) and richness (4.01) were lower than T3, indicating that although the number of plants was large, the community quality was low when no growth promoter was added; T7 showed a significant decrease in all indicators due to the lack of shade net protection, confirming the important role of shade net in the early stage of vegetation establishment; the overall performance of T4, T5, and T6 was not as good as T3, verifying the scientific rationality of the shrub and grass ratio of the present invention. In summary, the technical solution of this invention achieves multiple benefits in sandy land ecological restoration, including rapid sand fixation, enhanced species diversity, and optimized community structure. This invention utilizes a compound microbial growth promoter to accelerate the growth of *Bryum spp.* and other plants, improve the soil microenvironment, promote microbial community development, fundamentally enhance soil fertility and biological activity, and provide continuous support for plant establishment and growth.

[0049] Experiment 2 In the process of desert ecological restoration, artificial intervention measures aim to quickly stabilize the sand surface, improve habitats, and ultimately guide vegetation towards a stable and diverse natural community. The species composition, dominant species changes, and diversity of plant communities are key indicators for measuring the effectiveness of ecological restoration. This experiment compares the plant community characteristics of different artificially treated plots (T1, T2, T3) with the untreated control plot (T0) to clarify the specific effects of the adopted restoration technologies on promoting the natural restoration of desert vegetation, optimizing community structure, and enhancing ecosystem stability.

[0050] To compare the plant community characteristics of T0, T1, T2, and T3 in Experiment 1, a plant community survey was conducted at each fixed quadrat at the end of the growing season. All vascular plant species were recorded, and their importance values ​​were calculated. This index comprehensively reflects the abundance, frequency, and cover of a species in the community. The higher the value, the more significant its ecological dominance. The details are as follows: The importance value (IV) of a species = (relative abundance + relative frequency + relative coverage) / 3; Relative abundance = (Abundance of this species / Sum of abundance of all species) × 100%; Relative frequency = (frequency of this species / sum of frequencies of all species) × 100%; Relative coverage = (coverage of this species / sum of coverage of all species) × 100%.

[0051] Table 1. Plant community structure characteristics of each treatment plot

[0052] As shown in Table 1, the technical solution (T3) of this invention is significantly superior to other treatment groups in terms of species richness, community structure complexity, and ecosystem stability. Compared with T1, the importance value of perennial herb *Leymus chinensis* in T3 is significantly higher than that in T1, and artificially sown shrubs are successfully established. Compared with T2, the number of species in T3 is significantly increased, and the development of perennial herbs is better. Compared with T7, the species richness of T3 is greatly improved, while the dominance of *Setaria viridis* decreases. Compared with T4 and T5, the combination of shrubs and grasses in T3 forms a multi-layered vegetation structure, with stronger community three-dimensionality and stability. Compared with T6, the ratio of shrubs and grasses in T3 is more conducive to shrub establishment and balanced species development. In summary, the technical solution of this invention, through the combined action of water-retaining agents, compound microbial growth promoters, shade nets, and a multi-ratio combination of shrubs and grasses, can maximize species diversity, promote the successful establishment of perennial herbs and shrubs, accelerate the positive succession of plant communities from a simple pioneer stage to a complex and stable stage, and significantly enhance the restoration effect and long-term stability of sandy ecosystems.

Claims

1. A method for sandy land remediation based on a combination of sphagnum moss complex and multiple species of shrubs and grasses, characterized in that, Includes the following steps: S1. Apply a water-retaining agent to the surface of the sandy land to be treated; S2, spraying sphagnum moss compound promotes the formation of biological soil crust; S3. Cover the sandy surface with shade netting; The bryophyte complex contains silver leaf bryophyte, plant seeds, and a compound microbial growth promoter; The compound microbial growth promoter is composed of trehalose, glycerol, potassium dihydrogen phosphate, ferrous sulfate heptahydrate, disodium EDTA, sodium molybdate, and glycine betaine.

2. The sandy land restoration method according to claim 1, characterized in that, The method for obtaining the silver leaf true sphagnum moss is as follows: collect the bark of silver leaf true sphagnum moss, dry it in the shade, grind it into a fine soil-like state, filter it through a soil sieve with a pore size of 0.1 mm and mix it evenly.

3. The sandy land restoration method according to claim 1, characterized in that, The preparation method of the compound microbial growth promoter is as follows: (1) Weigh out 30-80 grams of trehalose, 60-80 ml of glycerol, 5-10 grams of potassium dihydrogen phosphate, 3-5 grams of ferrous sulfate heptahydrate, 0.2-0.4 grams of sodium molybdate, and 10-30 grams of glycine betaine; (2) Dissolve the above components in deionized water in sequence and stir until completely dissolved; (3) Add 0.1-0.3 g of disodium EDTA and continue stirring until well mixed; (4) Make up to 100 liters with deionized water to obtain the compound microbial growth promoter.

4. The sandy land restoration method according to claim 3, characterized in that, Based on the mass ratio, mix the following mixtures to form a suspension: Silver Leaf Moss: Plant Seeds: Compound Microbial Growth Promoter = (15-25): (2-3): (1-2) before use.

5. The sandy land restoration method according to claim 1, characterized in that, During the soil crust formation period and the seedling stage, the shading rate of the shade net is 60%-80%; after the vegetation enters the stable growth period, the shading rate of the shade net decreases to 20%-40%.

6. The sandy land restoration method according to claim 1, characterized in that, In step S1, the water-retaining agent is an agricultural and forestry water-retaining agent; the dosage of the water-retaining agent is 3-5 kg / mu, and the water-retaining agent is applied directly to the land, mixed evenly with the soil, and then watered.

7. The sandy land restoration method according to claim 1, characterized in that, The application rate of the moss compound is 150-250g per square meter of sandy land.

8. The sandy land restoration method according to claim 1, characterized in that, The plant seeds are shrub seeds and herb seeds; among them, the shrubs are Lespedeza bicolor, Caragana korshinskii, Tamarinus chinensis, and Salix babylonica; the herbs are Amaranthus praecox, Leymus chinensis, Bromus scabra, Leymus chinensis, Leymus chinensis, Poa annua, and Amaranthus spp.

9. The sandy land restoration method according to claim 8, characterized in that, Based on the mass ratio, the ratio of shrubs to herbs is as follows: Shrubs: Lespedeza 5%, Caragana korshinskii 25%, Tamarix chinensis 8%, Salix babylonica 10%; Herbs: 5% Sophora flavescens, 5% Leymus chinensis, 10% Bromus scabra, 5% Leymus chinensis, 8% Agropyron cristatum, 4% Poa annua, 8% Sorghum spp.

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