A closed-loop soil improvement method for vineyards using organic fertilizer synergy

Abstract

This invention discloses a closed-loop soil improvement method for vineyards using organic fertilizer synergy, comprising the following steps: seasonal directional grass cultivation, preparation of Bacillus subtilis agent, preparation and application of self-made organic fertilizer in the early stage of vineyard establishment, and closed-loop synergistic improvement method; the closed-loop synergistic improvement method is divided into early stage improvement and late stage improvement, relying on grass return to the field and Bacillus subtilis to maintain soil fertility and nutrient cycle.

Description

Technical Field

[0001] This invention relates to the field of soil improvement technology, and specifically to a closed-loop soil improvement method for vineyards using organic fertilizer in synergy. Background Technology

[0002] Soil degradation is a prominent problem in existing vineyards, especially in vineyards with coastal sedimentary soils (highly alkaline, compacted, and nutrient-imbalanced) and slightly acidic soils (acidified, lacking organic matter, and with low microbial activity). Severe soil degradation severely restricts grapevine vigor, fruit quality, and resilience. Traditional methods of vineyard soil improvement mostly rely solely on organic fertilizer application. However, organic fertilizers alone cannot target and regulate soil pH, resulting in unstable pH regulation, long improvement cycles, and incomplete microbial restoration. Some vineyard soil improvement methods introduce sod cover, but the sod varieties are not optimized for the season and soil type, exogenous microbial agents are difficult to maintain long-term effectiveness, fertilization efficiency is limited, and continuous topdressing is required later, increasing planting costs and making it difficult to achieve a closed-loop improvement effect. For example, fertilization methods for grape cultivation in slightly saline soils still rely on biogas residue and biogas slurry combined with chemical fertilizers, failing to achieve resource recycling with zero topdressing. Therefore, there is an urgent need for a closed-loop method that integrates the cultivation of the required microbial agents, seasonal sowing, and one-time base fertilizer for vineyard soil types (marine sedimentary soil or weakly acidic soil) to solve problems such as soil acid-base imbalance, insufficient organic matter, microecological imbalance, and dependence on later fertilization. Summary of the Invention

[0003] To address the aforementioned problems, this invention proposes a closed-loop soil improvement method for vineyards that combines organic fertilizer with soil improvement, meeting the needs of improving both alkaline and slightly acidic coastal sedimentary soils in vineyards. This invention integrates Bacillus subtilis agent, seasonal winter and summer sod cultivation, and a one-time application of self-made organic fertilizer at the initial stage of vineyard establishment to construct a closed-loop improvement system.

[0004] Implementation of the present invention: The closed-loop soil improvement method for vineyards using organic fertilizer synergy described in this invention includes the following steps:

[0005] Step 1: Seasonal directional grass cultivation, including: (1) Grass selection: alfalfa is selected for winter grass cultivation; corn grass is selected for summer and autumn grass cultivation; (2) Planting method: plant alfalfa or corn grass between the rows of grapevines, avoiding the main trunk of the grapevines; (3) Field management: alfalfa is sown, and the soil moisture is kept at 40%-60% after emergence. It is not cut during the growth period. It is returned to the field after natural death in June-July of the following year; corn grass is sown, and the soil moisture is kept at 50%-60% after emergence. It is cut 5-6 times a year, and the fresh grass after cutting is evenly covered around the roots of the grapevines; (4) Seasonal cycle of alfalfa and corn grass: alfalfa is sown after corn grass is harvested in autumn. Corn grass is sown after alfalfa dies naturally in the summer of the following year. The "alfalfa-corn grass" rotation is repeated.

[0006] Step 2: Preparation of Bacillus subtilis agent: purchased from Zhejiang Huijia Biotechnology Co., Ltd.

[0007] Step 3: Preparation and application of organic fertilizer in the early stages of vineyard establishment

[0008] (1) Preparation of organic fertilizer raw materials: By weight, 60-70% sheep manure or cow manure and 30-40% straw powder (moisture content 50-65%) are mixed evenly to obtain a mixture. Then, 0.006%-0.015% Bacillus subtilis inoculant is added, and the initial humidity is adjusted to 55%-60% to obtain organic fertilizer raw materials.

[0009] (2) Organic fertilizer preparation - homemade composted organic fertilizer: pile the above organic fertilizer raw materials into a pile 1.2-1.5m high and 2-3m wide, and ferment naturally for 2-3 days. When the temperature of the pile rises to 55-65℃, keep it for 5-7 days. Then turn the pile over and cool it down to 35-45℃. Continue fermentation for 15-20 days until the pile has no odor and turns blackish-brown.

[0010] (3) Application method, only in the early stage of vineyard establishment: When preparing the land for vineyard establishment, spread the decomposed organic fertilizer evenly on the soil surface at a rate of 25-30 tons / mu. Then, plow to a depth of 25-50cm to fully mix the organic fertilizer with the soil. After leveling, transplant the grape seedlings. After vineyard establishment, no additional fertilizer is required. Soil fertility and nutrient cycling are maintained entirely by returning the grass to the field and using Bacillus subtilis.

[0011] Preferably, the field management in step one (3) is as follows: alfalfa is sown in winter from September to November and naturally dies in the high-temperature period of the following year from May to July. It is then returned to the field to replenish soil nitrogen. Alfalfa has a strong nitrogen-fixing ability and is suitable for coastal sedimentary soil or weakly acidic soil. It does not need to be cut. Corn grass is sown in summer and autumn from May to July and cut in November. After cutting, it is covered or returned to the field. The amount of fresh grass cut per mu each time is 2000-3000 catties. Corn grass grows fast and has a high biomass, which quickly replenishes soil organic matter. It is suitable for coastal sedimentary soil or weakly acidic soil.

[0012] Preferably, the alfalfa-corn grass seasonal cycle is as follows: corn grass is harvested in autumn (September-November), alfalfa is sown, and corn grass is sown again in summer (May-July) after the alfalfa dies naturally. The "alfalfa-corn grass" rotation is repeated, and the corn grass is harvested 5-6 times a year and the fresh grass is returned to the field.

[0013] Preferably, the alfalfa-corn grass seasonal cycle is as follows: in autumn (September-November) before the corn grass is harvested, alfalfa is intercropped until the corn grass is harvested in November; in the following summer (May-July) before the alfalfa dies naturally, corn grass is intercropped until the alfalfa dies naturally, repeating the "alfalfa-corn grass" rotation. The corn grass is cut 5-6 times a year, and the fresh grass is returned to the field. The corn grass is cut when it grows to 50-60cm, leaving a stubble height of 8-10cm.

[0014] Preferably, the CFU of the Bacillus subtilis inoculant is 100 billion / g; the Bacillus subtilis is designated as HJKC1901.

[0015] Preferably, the specific closed-loop synergistic improvement process for the two types of soil, namely, tidal flat sedimentary soil and weakly acidic soil, is as follows: (1) First year of the initial stage of orchard establishment: A. Soil pretreatment: For tidal flat sedimentary soil with an initial pH of approximately 8.0 and weakly acidic soil with an initial pH of approximately 5.5-6.0, remove debris and level the plot; B. Application of organic fertilizer: Spread 25-30 tons / mu of self-made decomposed organic fertilizer, and plow the entire orchard to a depth of 50cm to ensure that the decomposed organic fertilizer is fully mixed with the soil; C. Application of Bacillus subtilis inoculant: Apply 10-20g of Bacillus subtilis inoculant per mu, which is equivalent to 10000-20000 billion CFU, and mix it with the topsoil; Application method: Dilute Bacillus subtilis with water and apply it to the soil, and mix it evenly; D. Grassing Planting: According to the above step one, carry out seasonal directional grass cultivation, including grass selection, planting and management, that is, sow alfalfa in September-November and corn grass in May-July, and cultivate according to the corresponding field management method; F. Grape transplanting: Grape seedlings can be transplanted in November-December of the current year or March-April of the following year. Apply decomposed organic fertilizer one month before transplanting. Transplant grape seedlings 10-15 days after applying organic fertilizer; (2) The second year after the establishment of the garden: Bacillus subtilis supplementation: Before the grape buds sprout in March-April of each year, apply 6-12g of Bacillus subtilis agent per mu, and apply it by watering, that is, Bacillus subtilis agent is diluted with water and then applied by watering; carry out seasonal cycling of alfalfa and corn grass according to step one (4).

[0016] Preferably, the alfalfa and corn grass are sown at least 50 cm away from the main trunk of the grapevine.

[0017] Preferably, the decomposed organic fertilizer contains ≥40% organic matter and has a pH value of 6.5-7.5.

[0018] Preferably, the soil pH value is tested after harvesting fruit every autumn. For example, the pH of coastal sedimentary soil should be maintained at ≤7, and the pH of weakly acidic soil should be maintained at 6.5-7, without the need for additional adjustment.

[0019] The beneficial effects of this invention are: First, the method of this invention solves the problems of pH imbalance and insufficient organic matter in vineyard coastal sedimentary soil (alkaline) and weakly acidic soil, with a clear pH adjustment effect (the pH of coastal soil drops from 8.0 to below 7, and the pH of weakly acidic soil rises from 5.5-6.0 to 6.5-7); Second, this invention provides highly efficient and complementary seasonal grass cover: alfalfa fixes nitrogen in winter, and corn grass rapidly fertilizes in summer and autumn (2000-3000 catties of fresh grass is cut per acre each time), with simple management (alfalfa is not cut, and corn grass is cut as needed), which is suitable for the grape growth cycle; Third, it achieves closed-loop zero topdressing: In the early stages of the vineyard, a sufficient amount of organic fertilizer is applied once, and subsequent fertilization relies on the return of grass to the field and the recycling of native bacteria, eliminating the need for additional fertilization and reducing planting costs by 18%-20%. Fourth, the effects are comprehensive and significant: after improvement, the soil organic matter is increased, the grapevines are vigorous, the fruit firmness is increased by 13%-15%, the soluble solids content is increased by 1.6-1.8 percentage points, the content of all elements is increased, the flavor is rich, the color uniformity is improved by 30%, the resistance to stress (resistance to high temperature and leaf senescence) is significantly enhanced, and the incidence of soil-borne diseases is reduced by 32%-35%. Both types of soil can achieve stable improvement effects. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments.

[0021] The present invention discloses a closed-loop soil improvement method for vineyards using organic fertilizer synergy, comprising the following steps:

[0022] Step 1: Seasonal directional grass cultivation, including: (1) Grass selection: alfalfa is selected for winter grass cultivation; corn grass is selected for summer and autumn grass cultivation; (2) Planting method: plant alfalfa or corn grass between grapevines; sowing amount: alfalfa 1-1.5kg / mu, sowing depth 1-2cm; corn grass 2-2.5kg / mu, sowing depth 2-3cm; row spacing 30-50cm, avoiding the main trunk of grapevines by at least 50cm to avoid nutrient competition. (3) Field management: Sow alfalfa, keep the soil moisture at 40%-60% after emergence, do not cut during the growth period, and return to the field after natural death in June-July of the following year; Sow corn grass, keep the soil moisture at 50%-60% after emergence, cut 5-6 times a year, and finish cutting in November of the same year. The fresh grass after cutting is evenly covered around the roots of the grapevines; (4) Seasonal cycle of alfalfa and corn grass: Sow alfalfa after harvesting corn grass in autumn, and sow corn grass after the alfalfa dies naturally in the following summer, repeating the "alfalfa-corn grass" rotation.

[0023] Step 2: Preparation of Bacillus subtilis agent: purchased from Zhejiang Huijia Biotechnology Co., Ltd.

[0024] Step 3: Preparation and application of organic fertilizer in the early stages of vineyard establishment

[0025] (1) Preparation of organic fertilizer raw materials: By weight, 60-70% sheep manure or cow manure and 30-40% straw powder (moisture content 50-65%) are mixed evenly to obtain a mixture. Then, 0.006%-0.015% Bacillus subtilis inoculant is added, and the initial humidity is adjusted to 55%-60% to obtain organic fertilizer raw materials.

[0026] (2) Organic fertilizer preparation - homemade composted organic fertilizer: pile the above organic fertilizer raw materials into a pile 1.2-1.5m high and 2-3m wide, and ferment naturally for 2-3 days. When the temperature of the pile rises to 55-65℃, keep it for 5-7 days. Then turn the pile over and cool it down to 35-45℃. Continue fermentation for 15-20 days until the pile has no odor and turns blackish-brown.

[0027] (3) Application method, only in the early stage of vineyard establishment: When preparing the land for vineyard establishment, spread the decomposed organic fertilizer evenly on the soil surface at a rate of 25-30 tons / mu. Then, plow to a depth of 25-50cm to fully mix the organic fertilizer with the soil. After leveling, transplant the grape seedlings. After vineyard establishment, no additional fertilizer is required. Soil fertility and nutrient cycling are maintained entirely by returning the grass to the field and using Bacillus subtilis.

[0028] The field management of step one (3) is as follows: Alfalfa is sown in winter from September to November and naturally dies in the high-temperature period of May to July of the following year. It is then returned to the field to replenish soil nitrogen. Alfalfa has strong nitrogen fixation ability and is suitable for coastal sedimentary soil or weakly acidic soil. It does not need to be cut. Corn grass is sown in summer and autumn from May to July and cut in November. After cutting, it is covered or returned to the field. The amount of fresh grass cut per mu each time is 2000-3000 jin. Corn grass grows fast and has high biomass, which quickly replenishes soil organic matter. It is suitable for coastal sedimentary soil or weakly acidic soil.

[0029] One method of the alfalfa-corn grass seasonal cycle is to harvest corn grass in autumn (September-November) and then sow alfalfa. In the following summer (May-July), after the alfalfa dies naturally, corn grass is sown again, repeating the "alfalfa-corn grass" rotation. The corn grass is harvested 5-6 times a year, and the fresh grass is returned to the field.

[0030] Another way to implement the alfalfa-corn grass seasonal cycle is to intercrop alfalfa in autumn (September-November) before the corn grass is harvested, until the corn grass is harvested in November; then, in the following summer (May-July) before the alfalfa dies naturally, intercrop corn grass is planted again until the alfalfa dies naturally, repeating the "alfalfa-corn grass" rotation. The corn grass is harvested 5-6 times a year, and the fresh grass is returned to the field. The corn grass is harvested when it grows to 50-60cm, leaving a stubble height of 8-10cm.

[0031] The Bacillus subtilis inoculant has a CFU of 100 billion / g; the Bacillus subtilis is designated as HJKC1901.

[0032] The specific closed-loop synergistic improvement process for two types of soils, namely tidal flat sedimentary soil and weakly acidic soil, is as follows: (1) Initial stage of orchard establishment (first year): A. Soil pretreatment: For tidal flat sedimentary soil with an initial pH of approximately 8.0 and weakly acidic soil with an initial pH of approximately 5.5-6.0, remove debris and level the plots; B. Application of organic fertilizer: Spread 25-30 tons / mu of self-made decomposed organic fertilizer, and deep plow the entire orchard to a depth of 50cm to ensure that the decomposed organic fertilizer is fully mixed with the soil; C. Application of Bacillus subtilis inoculant: Apply 10-20g of Bacillus subtilis inoculant per mu, equivalent to 10000-20000 billion CFU, and mix it with the topsoil; Application method: Dilute Bacillus subtilis with water and apply it to the soil, and mix it evenly; D. Planting of grass: According to the above Step 1 involves seasonal directional grass cultivation, including grass selection, planting and management, i.e., sowing alfalfa in September-November and corn grass in May-July, and cultivating according to the corresponding field management methods; F. Grape transplanting: Grape seedlings can be transplanted in November-December of the current year or March-April of the following year. Apply well-rotted organic fertilizer one month before transplanting, and transplant grape seedlings 10-15 days after applying organic fertilizer; (2) The second year after the establishment of the vineyard: Bacillus subtilis supplementation: Before the grapes sprout in March-April each year, apply 6-12g of Bacillus subtilis agent per mu, and apply it by watering, i.e., Bacillus subtilis agent is diluted with water and then applied by watering; Alfalfa and corn grass seasonal cycle, which is the same as step 1 (4) alfalfa and corn grass seasonal cycle.

[0033] The decomposed organic fertilizer contains ≥40% organic matter and has a pH value of 6.5-7.5.

[0034] Every autumn after harvesting fruit, the soil pH value is tested. For example, the pH of coastal sedimentary soil is maintained at ≤7, and the pH of weakly acidic soil is maintained at 6.5-7, without the need for additional adjustment. Specific Implementation

[0035] (a) Implementation Location

[0036] 1. Implementation site 1: Shenshan Luyuan Grape Plantation in Cixi City, Ningbo, Zhejiang Province (marine sedimentary soil, initial pH≈8.0, compacted, organic matter content 1.0%), the main grape variety is Kyoho grape;

[0037] 2. Implementation site 2: Jinxuan Farm in Yiwu City, Zhejiang Province (Wangcun Village, Fotang Town, weakly acidic soil, initial pH≈5.8, organic matter content 1.1%), the main grape variety is Kyoho grape.

[0038] (II) Implementation Methods

[0039] 1. Bacillus subtilis: purchased from Zhejiang Huijia Biotechnology Co., Ltd., CFU was 100 billion / g;

[0040] 2. Homemade organic fertilizer preparation: Mix sheep manure (65%) and straw (50-65% moisture content) (35%), inoculate with 0.13% Bacillus subtilis inoculant, ferment for 25 days to obtain decomposed organic fertilizer (42% organic matter content, pH≈7.0).

[0041] 3. Early stage of park construction (Year 1):

[0042] (1) At both implementation sites, 28 tons / mu of self-made decomposed organic fertilizer was spread and the soil was deeply plowed to 50cm; 12g of Bacillus subtilis agent was applied per mu, and water was poured in and mixed with the topsoil.

[0043] (2) Alfalfa was sown at both implementation sites in late September (sowing amount 1.2 kg / mu). After the alfalfa died naturally in late May of the following year, corn grass was sown (sowing amount 2.3 kg / mu).

[0044] (3) Transplant the Kyoho grape seedlings 12 days after applying organic fertilizer.

[0045] 4. Post-establishment management (Years 2-3):

[0046] (1) In mid-March each year, apply 8g of Bacillus subtilis inoculant per mu at both implementation sites, combined with irrigation;

[0047] (2) Cut the corn grass when it grows to about 55cm, leaving a stubble of 9cm. Cut it 5-6 times a year, with about 2,500 catties of fresh grass cut per mu each time. The fresh grass is used to cover the roots of the grapevines.

[0048] (3) After the corn grass is harvested in September, alfalfa is sown to maintain the seasonal rotation of "alfalfa-corn grass" without any additional fertilizer.

[0049] (III) Implementation Results

[0050] Three years after implementation:

[0051] 1. Cixi Shenshan Luyuan Grape Plantation (Coastal Sedimentary Soil): pH value decreased to 6.8, soil bulk density decreased by 0.18 g / cm³, and organic matter content increased to 1.7%; grapevines showed significantly enhanced resistance to high temperatures and leaf senescence, fruit firmness increased by 15%, soluble solids content increased by 1.8 percentage points, color uniformity improved by 30%, flavor was rich, yield per mu increased by 22%, and the incidence of soil-borne diseases decreased by 35%;

[0052] 2. Jin Xuan Farm, Yiwu City (weakly acidic soil): pH value increased to 6.7, organic matter content increased to 1.8%; grapevines are vigorous, resistance to adverse conditions is significantly enhanced, fruit firmness increased by 13%, soluble solids content increased by 1.6 percentage points, total element content increased, coloring effect is excellent, yield per mu increased by 20%, and soil-borne disease incidence decreased by 32%;

[0053] 3. The improvement effect at both implementation sites is stable, and no additional fertilization is required throughout the process, reducing planting costs by 18%-20%, which meets the needs of sustainable agricultural development.

[0054] The method of this invention achieves targeted regulation of soil pH and restoration of micro-ecology; alfalfa fixation in winter and rapid fertilization by corn grass in summer and autumn, which are seasonally complementary and easy to manage; a sufficient amount of organic fertilizer is applied at the beginning of the vineyard establishment, and soil fertility is maintained by returning grass to the field and Bacillus subtilis thereafter, without the need for additional topdressing. The three work together to achieve a virtuous cycle of "pH regulation - organic matter replenishment - micro-ecological reconstruction - nutrient cycling", which solves the core problems of two types of soil and is suitable for the planting needs of grape producing areas.

Claims

1. A closed-loop soil improvement method for vineyards using organic fertilizer in synergy, characterized in that... The method includes the following steps: Step 1: Seasonal directional grass cultivation, including: (1) Grass selection: alfalfa is selected for winter grass cultivation; corn grass is selected for summer and autumn grass cultivation; (2) Planting method: plant alfalfa or corn grass between the rows of grapevines, avoiding the main trunk of the grapevines; (3) Field management: alfalfa is sown, and the soil moisture is kept at 40%-60% after emergence. It is not cut during the growth period. It is returned to the field after natural death in June-July of the following year; corn grass is sown, and the soil moisture is kept at 50%-60% after emergence. It is cut 5-6 times a year, and the fresh grass after cutting is evenly covered around the roots of the grapevines; (4) Seasonal cycle of alfalfa and corn grass: alfalfa is sown after corn grass is harvested in autumn. Corn grass is sown after alfalfa dies naturally in the summer of the following year. The "alfalfa-corn grass" rotation is repeated. Step 2: Preparation of Bacillus subtilis agent: purchased from Zhejiang Huijia Biotechnology Co., Ltd. Step 3: Preparation and application of organic fertilizer in the early stages of vineyard establishment (1) Preparation of organic fertilizer raw materials: By weight, 60-70% sheep manure or cow manure and 30-40% straw powder (moisture content 50-65%) are mixed evenly to obtain a mixture. Then, 0.006%-0.015% Bacillus subtilis inoculant is added, and the initial humidity is adjusted to 55%-60% to obtain organic fertilizer raw materials. (2) Organic fertilizer preparation - homemade composted organic fertilizer: pile the above organic fertilizer raw materials into a pile 1.2-1.5m high and 2-3m wide, and ferment naturally for 2-3 days. When the temperature of the pile rises to 55-65℃, keep it for 5-7 days. Then turn the pile over and cool it down to 35-45℃. Continue fermentation for 15-20 days until the pile has no odor and turns blackish-brown. (3) Application method, only in the early stage of vineyard establishment: When preparing the land for vineyard establishment, spread the decomposed organic fertilizer evenly on the soil surface at a rate of 25-30 tons / mu. Then, plow to a depth of 25-50cm to fully mix the organic fertilizer with the soil. After leveling, transplant the grape seedlings. After vineyard establishment, no additional fertilizer is required. Soil fertility and nutrient cycling are maintained entirely by returning the grass to the field and using Bacillus subtilis.

2. The closed-loop soil improvement method for vineyards with synergistic organic fertilizer use according to claim 1, characterized in that... The field management of step one (3) is as follows: Alfalfa is sown in winter from September to November and naturally dies in the high-temperature period of the following year from May to July. It is then returned to the field to replenish soil nitrogen. Alfalfa has a strong nitrogen-fixing ability and is suitable for coastal sedimentary soil or weakly acidic soil. It does not need to be cut. Corn grass is sown in summer and autumn from May to July and cut in November. After cutting, it is covered or returned to the field. The amount of fresh grass cut per mu each time is 2000-3000 jin. Corn grass grows fast and has a high biomass, which quickly replenishes soil organic matter. It is suitable for coastal sedimentary soil or weakly acidic soil.

3. The closed-loop soil improvement method for vineyards with synergistic organic fertilizer use according to claim 1, characterized in that... The alfalfa-corn grass seasonal cycle is as follows: after harvesting corn grass in autumn (September-November), alfalfa is sown. In the following summer (May-July), after the alfalfa dies naturally, corn grass is sown, repeating the "alfalfa-corn grass" rotation. Corn grass is harvested 5-6 times a year, and the fresh grass is returned to the field.

4. The closed-loop soil improvement method for vineyards with synergistic organic fertilizer use according to claim 1, characterized in that... The alfalfa-corn grass seasonal cycle is as follows: in autumn, from September to November, before the corn grass is harvested, alfalfa is intercropped until the corn grass is harvested in November; in the following summer, from May to July, before the alfalfa dies naturally, corn grass is intercropped until the alfalfa dies naturally, repeating the "alfalfa-corn grass" rotation. The corn grass is cut 5-6 times a year, and the fresh grass is returned to the field. The corn grass is cut when it grows to 50-60cm, leaving a stubble height of 8-10cm.

5. The closed-loop soil improvement method for vineyards with synergistic organic fertilizer use according to claim 1, characterized in that... The Bacillus subtilis inoculant has a CFU of 100 billion / g; the Bacillus subtilis is designated as HJKC1901.

6. The closed-loop soil improvement method for vineyards with synergistic organic fertilizer use according to claim 1, characterized in that... The specific closed-loop synergistic improvement process for two types of soils, namely tidal flat sedimentary soil and weakly acidic soil, is as follows: (1) First year of the initial stage of orchard establishment: A. Soil pretreatment: For tidal flat sedimentary soil with an initial pH of approximately 8.0 and weakly acidic soil with an initial pH of approximately 5.5-6.0, remove debris and level the plots; B. Application of organic fertilizer: Apply 25-30 tons / mu of self-made decomposed organic fertilizer, and cultivate the entire orchard to a depth of 50cm to ensure that the decomposed organic fertilizer is fully mixed with the soil; C. Application of Bacillus subtilis inoculant: Apply 10-20g of Bacillus subtilis inoculant per mu and mix it with the topsoil; D. Planting of grass: Perform seasonal planting according to the above steps. Directed grass cultivation includes grass selection, planting and field management, i.e., sowing alfalfa in September-November and corn grass in May-July, and cultivating according to the corresponding field management methods; F. Grape transplanting: transplant grape seedlings in November-December of the current year or March-April of the following year. Apply decomposed organic fertilizer one month before transplanting. Transplant grape seedlings 10-15 days after applying organic fertilizer; (2) The second year after the establishment of the vineyard: Bacillus subtilis supplementation: apply 6-12g of Bacillus subtilis agent per mu before grape budding in March-April of each year, and apply it by watering; carry out seasonal cycling of alfalfa and corn grass according to step one (4).

7. The closed-loop soil improvement method for vineyards with synergistic organic fertilizer use according to claim 1, characterized in that... The alfalfa and corn grass should be sown at least 50cm away from the main trunk of the grapevine.

8. The closed-loop soil improvement method for vineyards with synergistic organic fertilizer use according to claim 1, characterized in that... The decomposed organic fertilizer contains ≥40% organic matter and has a pH value of 6.5-7.

5.

9. The closed-loop soil improvement method for vineyards with synergistic organic fertilizer use according to claim 1, characterized in that... Every autumn after harvesting fruit, the soil pH value is tested. For example, the pH of coastal sedimentary soil is maintained at ≤7, and the pH of weakly acidic soil is maintained at 6.5-7, without the need for additional adjustment.