CN110073906B - Method for repairing degraded desertified grassland by planting herbaceous crops by wrapping and embedding nutrient slurry - Google Patents
Method for repairing degraded desertified grassland by planting herbaceous crops by wrapping and embedding nutrient slurry Download PDFInfo
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- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C1/00—Apparatus, or methods of use thereof, for testing or treating seed, roots, or the like, prior to sowing or planting
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G20/00—Cultivation of turf, lawn or the like; Apparatus or methods therefor
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- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
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Abstract
The invention discloses a method for repairing degraded desertified grassland by planting herbaceous crops by a wrapped and clamped nutrient slurry embedding method, belonging to the technical field of ecological repair. Preparing wheat straw, rice straw and straws into pretreatment raw materials, then mixing the pretreatment raw materials with excrement, adding a straw decomposing agent and an excrement leavening agent, and decomposing and fermenting to obtain decomposed materials; mixing and stirring the corn flour gruel paste and the decomposed material into viscous nutrition slurry; wrapping grass seeds with the nutrient pulp, and preparing a rooting-promoting nutrient solution; directly spraying the root-promoting nutrient solution on a degraded grassland, and uniformly inlaying and sowing the nutrient slurry wrapped with grass seeds into soil; then evenly spraying and covering the nutrient slurry without the grass seeds on the nutrient slurry with the grass seeds; cultivating and managing until the degenerated desertification grassland restores the ecology. The method has high emergence rate and good effect, and is suitable for restoring the grassland ecology.
Description
Technical Field
The invention relates to a method for repairing degraded desertified grassland by planting herbaceous crops by a wrapped and clamped nutrient slurry embedding method, belonging to the technical field of ecological repair.
Background
The natural grassland area of China is nearly 60 hundred million mu, which accounts for 41.7 percent of the total area of the national soil, is the sum of forests and cultivated lands, and is about 3.2 times of the cultivated land and 2.3 times of the forest land. The area of the grassland mainly distributed in northern dry areas is about 44 hundred million mu, and the grassland occupies 3/4 of the total area of the grassland in China. Inner Mongolia, Tibet, Xinjiang, Qinghai, Sichuan and Gansu are provinces of six pasturing areas of China, wherein the area of the Tibetan grassland is the largest, the inner Mongolia is the second time, and Xinjiang is the third. The grassland has double functions of ecological production, people, grass and livestock are all components of the grassland ecological system, and the grassland ecological system can approximately offset 30 percent of the total carbon dioxide emission of China all year round according to estimation; the grassland is also the source and the conservation area of rivers in China, and the source water sources of Yangtze river, yellow river, billy river, angry river, Yalu Tibetan Bujiang river, Liaoning river, Black Longjiang river and the like are all from the grassland; the grassland is also an important material basis for the development of the animal husbandry and the basic production data which the farmers and herdsmen in the pastoral area rely on for survival can better develop the animal husbandry only by having a good grassland ecosystem. However, under the influence of natural, geographical, historical and artificial activities, the ecological protection of the grassland is more debt, and the most serious is the degradation of quality. The desertification area of the land reaches 1.26 hundred million hectares, the salinization area reaches 0.27 hundred million hectares, and the degraded grassland occupies 1/4 of the available grassland area; the contradiction between human, grass and livestock still exists, the ecological situation of the grassland is still severe, the whole ecological system of the grassland is still weak, the economic and social development of the grassland pastoral area is relatively lagged, the contradiction between ecological protection and development and utilization is still outstanding, and the tasks of the grassland resource and ecological protection are very hard and heavy.
The method for artificially planting a large number of grass seeds on the degraded desertification grass field is the main method for repairing the grass field, but the grass seeds are light in weight, wind and sand in the degraded grass field are larger, the grass seeds are easy to be blown away by strong wind, the land in the degraded grass field area is poor, the growth state of the grass seeds is poor, and the problems of low emergence rate and poor repairing effect of the grass seeds are caused by the factors. In addition, the meadow is barren and the fertilizer can not be applied into the meadow, the fertilizer is not easy to be utilized by the pasture, the solid fertilizer floats on the ground surface, the drought on the ground surface causes the fertilizer to be air-dried, the effect is difficult to be exerted, and the restoring effect of the meadow is poor.
Disclosure of Invention
In order to solve the problems of restoration of degraded desertified grasslands, low emergence rate of grass seeds and poor growth state of pasture, the invention provides a method for restoring degraded desertified grasslands by planting herbaceous crops by an embedding method of wrapped nutrient slurry, which adopts the following technical scheme:
the invention aims to provide a method for repairing degraded desertified grassland by planting herbaceous crops by embedding method of wrapped nutrient slurry, which comprises the following steps:
(1) preparation of the rotten clinker: respectively crushing wheat straw or rice straw and straws, mixing to obtain a pretreated raw material, mixing 20-80 parts by weight of the pretreated raw material with 30-70 parts by weight of excrement or biogas residues, adjusting the water content to 50% -60%, adding a straw decomposition agent and an excrement leavening agent, performing decomposition fermentation at 20-70 ℃, turning over once every 2 days when the temperature exceeds 50 ℃, and fermenting for 15-45 days to obtain a decomposed material;
(2) preparing nutrient slurry: mixing and stirring the corn flour gruel paste and the decomposed material into viscous nutrition slurry; wherein: mixing the corn flour porridge paste and the decomposed material according to the following parts by weight: 10-50 parts of corn flour porridge paste and 50-90 parts of rotten clinker;
(3) wrapping grass seeds with the nutrient slurry: soaking the grass seeds for 2h-14h with water until the grass seeds are swelled and do not germinate and are in a revival state, and then mixing the grass seeds with the nutrient slurry prepared in the step (2) to enable the grass seeds to be wrapped by the viscous nutrient slurry;
(4) preparing a root-promoting nutrient solution: mixing the bone blood peptide compound microbial fertilizer with water to prepare a root growth promoting nutrient solution;
(5) planting grass and applying fertilizer by an embedding method: directly spraying the root growth promoting nutrient solution prepared in the step (4) on the degenerated desertification grassland or spraying the root growth promoting nutrient solution after deep ploughing and harrowing the degenerated desertification grassland; then the nutrient slurry wrapped with grass seeds is output by utilizing vehicle-mounted hydraulic power or is additionally provided with a generator set to drive a high-pressure pump, and the grass seeds wrapped with the nutrient slurry are uniformly embedded and sown into the soil sprayed with the root-promoting nutrient solution under the action of pressure; then evenly spraying and covering the nutrient slurry without the grass seeds on the nutrient slurry with the grass seeds;
(6) and (3) fertilizer and water management: watering is started the next day after seeding, watering is carried out once a day within one week after seeding, and watering is stopped on the day of rain; after sowing for one week, the grass seeds germinate, grow out of root systems and are pricked into the soil downwards; spraying root promoting nutrient solution again after sprouting for one month, and continuing cultivation and management;
(7) and (4) replanting grass seeds in the non-emergence plots or the mowed plots according to the step (5) and the step (6) until the degraded grassland is repaired.
Preferably, the pulverization treatment in the step (1) is to pulverize to a length of not more than 2cm and knead into a filament shape.
Preferably, the straw in step (1) is derived from a mixture of one or more of corn, soybean, sorghum, and sunflower.
Preferably, the total adding amount of the straw decomposition agent and the excrement leavening agent in the step (1) is 0.1-1% of the total weight of the pretreatment raw material and the excrement or biogas residue.
Preferably, the manure in the step (1) is derived from any one or a mixture of more of pig manure, cow manure, sheep manure, donkey manure, wormcast, chicken manure, duck manure and goose manure.
Preferably, the preparation method of the corn gruel paste in the step (2) comprises the following steps: the corn flour and normal-temperature water are mixed in equal weight for humidification, water in an amount which is 10 times of the weight of the corn flour is heated to be boiled, then the humidified corn flour is poured into the boiled water for stirring, and the corn flour porridge paste is obtained after the corn flour is boiled again and is cooled for later use.
Preferably, the grass seeds in step (3) are one or more of alkali grass seeds, oat seeds, Chinese wildrye seeds and alfalfa seeds.
Preferably, the bone blood peptide compound microbial fertilizer in the step (4) and water are mixed according to the mass ratio of 1:300 to prepare the root growth promoting nutrient solution.
Preferably, 1kg to 20kg of grass seeds and a total of 6 tons to 10 tons of nutrient slurry are used per acre of deteriorated grassland.
Preferably, the spraying amount of the root growth promoting nutrient solution in the step (5) is as follows: 3 t/mu to 5 t/mu; the application amount of the nutrient slurry wrapping the grass seeds in the step (5) is 3 t/mu to 5 t/mu; the application amount of the nutrient slurry not wrapped by the grass seeds in the step (5) is 3 t/mu to 5 t/mu.
Preferably, the re-spraying amount of the root growth promoting nutrient solution in the step (6) is 300 kg/mu.
Preferably, the watering in step (6) is performed daily between 8 am and 15 pm.
The method is suitable for various types of degraded grasslands, particularly desertified grasslands and salinized grasslands.
The liquid bone blood peptide compound microbial fertilizer adopted by the invention can be purchased and obtained by Heilongjiang soil fertilizer industry Co., Ltd, and the product meets the standard NY/T798-2015 issued by the ministry of agriculture.
The invention has the beneficial effects that:
the invention prepares the humus clinker and the corn flour gruel paste, prepares the viscous nutrition slurry after compounding the humus clinker and the corn flour gruel paste, can improve the survival rate of grass seeds, provide a large amount of nutrient substances and microbial floras for soil, enhance the fertility and the activity of the soil, provide nutrient substances for the growth of grass seeds, in addition, the invention wraps grass seeds with the nutrient slurry and seeds the grass seeds in the soil in an inlaying way, the root-growth promoting nutrient solution is applied before sowing, under the combined action of the nutrient slurry and the root-promoting nutrient solution, grass seeds can quickly germinate and root, meanwhile, shelter is provided for grass seeds, roots can grow out and can be pricked into soil more easily, and a layer of nutrient slurry which is not wrapped with grass seeds is covered above the nutrient slurry wrapped with grass seeds, so that the effects of shading sunlight for the grass seeds which are inlaid and sowed, preventing the grass seeds from being scraped by strong wind, providing continuous nutrition and keeping humidity for a certain time can be achieved; the pressure can prevent grass seeds from floating on grass roots or other carriers, ensure that the grass seeds can absorb moisture and nutrition in a sticking manner, ensure high survival rate and high emergence rate, and solve the problems of low emergence rate of grass seeds and poor repairing effect caused by poor growth state. In addition, the invention also solves the problems that the grassland is barren and deficient in fertilizer, but can not be applied and is not easy to absorb by spraying the liquid fertilizer. The method for sowing the herbaceous crops such as the alkali grass or the alfalfa and the like by adopting the wrapping and carrying nutrient slurry embedding method is suitable for land blocks needing vegetation restoration such as saline-alkali soil, grassland restoration, semi-hillside retrogradation and returning grass and the like, is an effective method for restoring ecology in a grassland, and is a key node for influencing the meat quality by the forage grass quality in a closed-loop animal husbandry industrial chain, so that the problem of retrogradation and desertification of the grassland is very important for the animal husbandry.
Detailed Description
The present invention will be further described with reference to the following specific examples, but the present invention is not limited to these examples.
The bone blood peptide composite microbial fertilizer used in the following examples was purchased from Heilongjiang soil fertilizer Co.
In the following examples, the manure may be any one or a mixture of pig manure, cow manure, sheep manure, donkey manure, wormcast, chicken manure, duck manure and goose manure.
The following examples may include one or more of Alkale grass seed, oat seed, Chinese wildrye seed, and alfalfa seed. The multiple mixing is more beneficial to the diversity and palatability of grassland plants.
Example 1:
the embodiment provides a method for repairing degraded desertified grassland by planting herbaceous crops by embedding wrapped nutrient slurry, which comprises the following steps:
(1) preparation of the rotten clinker: respectively crushing wheat straw and straws to the length of not more than 2cm, kneading the wheat straw and the straws into filaments, mixing the filaments to obtain a pretreated raw material, mixing 20 parts by weight of the pretreated raw material with 70 parts by weight of excrement, adjusting the water content to 50-60%, adding a straw decomposition agent and an excrement leavening agent according to 0.3% of the total weight of the pretreated raw material and the excrement (or biogas residues), performing decomposition fermentation at the temperature of 20-70 ℃, turning over the mixture once every 2 days when the temperature exceeds 50 ℃, and fermenting for 15-45 days to obtain decomposed materials;
(2) preparing nutrient slurry: mixing corn flour and normal-temperature water in equal weight, humidifying, heating water in an amount which is 10 times of the weight of the corn flour to boil, pouring the humidified corn flour into the boiling water, stirring, boiling again to obtain corn flour porridge paste, and cooling for later use; mixing and stirring the corn flour gruel paste and the decomposed material into viscous nutrition slurry; wherein: mixing the corn flour porridge paste and the decomposed material according to the following parts by weight: 10 parts of corn flour porridge paste and 90 parts of rotten clinker;
(3) treating the grass seeds wrapped by the nutrient slurry: soaking the grass seeds for 2-14 h in water until the grass seeds are swelled and do not germinate, and then mixing the grass seeds with the nutrient slurry prepared in the step (2) to enable the grass seeds to be wrapped by the viscous nutrient slurry; 1kg of grass seeds and a total of 6 tons of nutrient slurry (including nutrient slurry with grass seeds and nutrient slurry without grass seeds) are used in each acre of deteriorated grassland;
(4) preparing a root-promoting nutrient solution: mixing the bone blood peptide composite microbial fertilizer and water according to the mass ratio of 1:300 to prepare a root growth promoting nutrient solution;
(5) planting grass and applying fertilizer by an embedding method: directly spraying the root growth promoting nutrient solution prepared in the step (4) on the degenerated desertification grassland or spraying the root growth promoting nutrient solution after deep ploughing and harrowing the degenerated desertification grassland; then the nutrient slurry wrapped with grass seeds is output by utilizing vehicle-mounted hydraulic power or is additionally provided with a generator set to drive a high-pressure pump, and the grass seeds wrapped with the nutrient slurry are uniformly embedded and sown into the soil sprayed with the root-promoting nutrient solution under the action of pressure; then evenly spraying and covering the nutrient slurry without the grass seeds on the nutrient slurry with the grass seeds; wherein: the spraying amount of the root promoting nutrient solution is 3 t/mu; the application of the nutrient slurry wrapped with grass seeds is 3 t/mu; the application of the nutrient slurry without grass seeds is 3 t/mu;
(6) and (3) fertilizer and water management: watering is started the next day after sowing, watering is carried out once every day between 8 am and 15 pm within a week after sowing, and watering is stopped on the day of meeting rain; after sowing for one week, the grass seeds germinate, grow out of root systems and are pricked into the soil downwards; spraying root promoting nutrient solution again after sprouting for one month, and continuing cultivation and management; wherein: the secondary spraying amount of the root promoting nutrient solution is 300 kg/mu;
(7) and (4) replanting grass seeds in the non-emergence plots or the mowed plots according to the step (5) and the step (6) until the degraded grassland is restored and the grassland is restored to ecology.
In the embodiment, the configuration of the vehicle-mounted operation tank is preferably 10 to 30 tons in tank volume.
Example 2
The embodiment provides a method for repairing desertification of a degraded grassland by planting herbaceous crops by embedding wrapped nutrient slurry, which comprises the following steps:
(1) preparation of the rotten clinker: respectively crushing straws and stalks to be not more than 2cm in length, kneading the straws and the stalks into filaments, mixing the filaments to obtain a pretreated raw material, mixing 80 parts by weight of the pretreated raw material with 30 parts by weight of excrement, adjusting the water content to 50-60%, adding a straw decomposition agent and an excrement leavening agent according to 1% of the total weight of the pretreated raw material and the excrement (or biogas residues), performing decomposition fermentation at the temperature of 20-70 ℃, turning over the straws once every 2 days when the temperature exceeds 50 ℃, and fermenting for 15-45 days to obtain decomposed materials;
(2) preparing nutrient slurry: mixing corn flour and normal-temperature water in equal weight, humidifying, heating water in an amount which is 10 times of the weight of the corn flour to boil, pouring the humidified corn flour into the boiling water, stirring, boiling again to obtain corn flour porridge paste, and cooling for later use; mixing and stirring the corn flour gruel paste and the decomposed material into viscous nutrition slurry; wherein: mixing the corn flour porridge paste and the decomposed material according to the following parts by weight: 50 parts of corn flour porridge paste and 50 parts of rotten clinker;
(3) treating the grass seeds wrapped by the nutrient slurry: soaking the grass seeds for 2-14 h in water until the grass seeds are swelled and do not germinate, and then mixing the grass seeds with the nutrient slurry prepared in the step (2) to enable the grass seeds to be wrapped by the viscous nutrient slurry; 20kg of grass seeds and a total of 10 tons of nutrient paste (including nutrient paste with grass seeds and nutrient paste without grass seeds) are used per mu of deteriorated grassland;
(4) preparing a root-promoting nutrient solution: mixing the bone blood peptide composite microbial fertilizer and water according to the mass ratio of 1:300 to prepare a root growth promoting nutrient solution;
(5) planting grass and applying fertilizer by an embedding method: directly spraying the root growth promoting nutrient solution prepared in the step (4) on the degenerated desertification grassland or spraying the root growth promoting nutrient solution after deep ploughing and harrowing the degenerated desertification grassland; then the nutrient slurry wrapped with grass seeds is output by utilizing vehicle-mounted hydraulic power or is additionally provided with a generator set to drive a high-pressure pump, and the grass seeds wrapped with the nutrient slurry are uniformly embedded and sown into the soil sprayed with the root-promoting nutrient solution under the action of pressure; then evenly spraying and covering the nutrient slurry without the grass seeds on the nutrient slurry with the grass seeds; wherein: the spraying amount of the root promoting nutrient solution is 5 t/mu; the spraying amount of the nutrient slurry wrapped with the grass seeds is 5 t/mu; the spraying amount of the nutrient slurry which is not wrapped with grass seeds is 5 t/mu;
(6) and (3) fertilizer and water management: watering is started the next day after sowing, watering is carried out once every day between 8 am and 15 pm within a week after sowing, and watering is stopped on the day of meeting rain; after sowing for one week, the grass seeds germinate, grow out of root systems and are pricked into the soil downwards; spraying root promoting nutrient solution again after sprouting for one month, and continuing cultivation and management; wherein: the secondary spraying amount of the root promoting nutrient solution is 300 kg/mu;
(7) and (5) replanting grass seeds on the non-emergence plots or the mowed plots according to the step (5) and the step (6) until the degraded grassland is restored and the ecology is restored.
In the embodiment, the configuration of the vehicle-mounted operation tank is preferably 10 to 30 tons in tank volume.
Example 3
The embodiment provides a method for recovering degraded grassland by planting herbaceous crops by embedding wrapped nutrient slurry, which comprises the following steps:
the embodiment provides a method for recovering degraded grassland by planting herbaceous crops by embedding wrapped nutrient slurry, which comprises the following steps:
(1) preparation of the rotten clinker: respectively crushing wheat straw, rice straw and straws to length of not more than 2cm, kneading the wheat straw, the rice straw and the straws into filaments, mixing the filaments to obtain a pretreated raw material, mixing 50 parts by weight of the pretreated raw material with 50 parts by weight of excrement, adjusting the water content to 50-60%, adding a straw decomposition agent and an excrement leavening agent according to 0.8% of the total weight of the pretreated raw material and the excrement (or biogas residue), performing decomposition fermentation at 20-70 ℃, turning over the mixture once every 2 days when the temperature exceeds 50 ℃, and fermenting for 15-45 days to obtain a decomposed material;
(2) preparing nutrient slurry: mixing corn flour and normal-temperature water in equal weight, humidifying, heating water in an amount which is 10 times of the weight of the corn flour to boil, pouring the humidified corn flour into the boiling water, stirring, boiling again to obtain corn flour porridge paste, and cooling for later use; mixing and stirring the corn flour gruel paste and the decomposed material into viscous nutrition slurry; wherein: mixing the corn flour porridge paste and the decomposed material according to the following parts by weight: 40 parts of corn flour porridge paste and 80 parts of rotten clinker;
(3) wrapping grass seeds with the nutrient slurry: soaking the grass seeds for 2-14 h in water until the grass seeds are swelled and do not germinate, and then mixing the grass seeds with the nutrient slurry prepared in the step (2) to enable the grass seeds to be wrapped by the viscous nutrient slurry; 15kg of grass seeds and a total of 10 tons of nutrient paste (including nutrient paste with grass seeds and nutrient paste without grass seeds) are used per mu of deteriorated grassland;
(4) preparing a root-promoting nutrient solution: mixing the bone blood peptide composite microbial fertilizer and water according to the mass ratio of 1:300 to prepare a root growth promoting nutrient solution;
(5) planting grass and applying fertilizer by an embedding method: directly spraying the root growth promoting nutrient solution prepared in the step (4) on the degenerated desertification grassland or spraying the root growth promoting nutrient solution after deep ploughing and harrowing the degenerated desertification grassland; then the nutrient slurry wrapped with grass seeds is output by utilizing vehicle-mounted hydraulic power or is additionally provided with a generator set to drive a high-pressure pump, and under the action of pressure, the nutrient slurry wrapped with grass seeds is uniformly embedded and sown in the soil sprayed with the root-promoting nutrient solution; then evenly spraying and covering the nutrient slurry without the grass seeds on the nutrient slurry with the grass seeds; wherein: the spraying amount of the root promoting nutrient solution is 4 t/mu; the spraying amount of the nutrition slurry wrapped with the grass seeds is 4 t/mu; the spraying amount of the nutrient slurry which is not wrapped with grass seeds is 4 t/mu;
(6) and (3) fertilizer and water management: watering is started the next day after sowing, watering is carried out once every day between 8 am and 15 pm within a week after sowing, and watering is stopped on the day of meeting rain; after sowing for one week, the grass seeds germinate, grow out of root systems and are pricked into the soil downwards; spraying root promoting nutrient solution again after sprouting for one month, and continuing cultivation and management; wherein: the secondary spraying amount of the root promoting nutrient solution is 300 kg/mu;
(7) and (5) replanting grass seeds on the non-emergence plots or the mowed plots according to the step (5) and the step (6) until the degraded grassland is restored and the ecology is restored.
In the embodiment, the configuration of the vehicle-mounted operation tank is preferably 10 to 30 tons in tank volume.
In the two month period after the grass seeds are planted according to the method of the embodiment 1-3, more than 95% of land blocks of the degenerated and desertified grass field grow green grass, the grass roots are thick and tillered, the soil is gradually in a soft state, the microbial activity is realized, the water retention capacity is gradually increased, the runoff can not appear in the rain, and the effect of the embodiment 2 is the best.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.
Claims (3)
1. A method for repairing degraded desertified grassland by planting herbaceous crops by a wrapped and clamped nutrient slurry mosaic method is characterized by comprising the following steps:
(1) preparation of the rotten clinker: respectively crushing wheat straw or rice straw and straws, mixing to obtain a pretreated raw material, mixing 20-80 parts by weight of the pretreated raw material with 30-70 parts by weight of excrement or biogas residues, adjusting the water content to 50% -60%, adding a straw decomposition agent and an excrement leavening agent, performing decomposition fermentation at 20-70 ℃, turning over once every 2 days when the temperature exceeds 50 ℃, and fermenting for 15-45 days to obtain a decomposed material; the crushing treatment is to crush the mixture to a length of not more than 2cm and to knead the mixture into filaments; the straws are from one or a mixture of corn, soybean, sorghum and sunflower; the total adding amount of the straw decomposition agent and the excrement leavening agent is 0.1-1% of the total weight of the pretreatment raw material and the excrement or biogas residue; the excrement is any one or a mixture of more of pig manure, cow manure, sheep manure, donkey manure, wormcast, chicken manure, duck manure and goose manure;
(2) preparing nutrient slurry: mixing and stirring the corn flour gruel paste and the decomposed material into viscous nutrition slurry; wherein: mixing the corn flour porridge paste and the decomposed material according to the following parts by weight: 10-50 parts of corn flour porridge paste and 50-90 parts of rotten clinker;
(3) wrapping grass seeds with the nutrient slurry: soaking the grass seeds for 2-14 h in water until the grass seeds are swelled and do not germinate, and then mixing the grass seeds with the nutrient slurry prepared in the step (2) to enable the grass seeds to be wrapped by the viscous nutrient slurry; the grass seeds are one or more of alkali grass seeds, oat seeds, Chinese wildrye seeds and alfalfa seeds;
(4) preparing a root-promoting nutrient solution: mixing the bone blood peptide compound microbial fertilizer with water to prepare a root growth promoting nutrient solution; the bone blood peptide compound microbial fertilizer and water are mixed according to the mass ratio of 1:300 to prepare a root growth promoting nutrient solution;
(5) planting grass and applying fertilizer by an embedding method: directly spraying the root growth promoting nutrient solution prepared in the step (4) on the degenerated desertification grassland or spraying the root growth promoting nutrient solution after deep ploughing and harrowing the degenerated desertification grassland; then the nutrient slurry wrapped with grass seeds is output by utilizing vehicle-mounted hydraulic power or is additionally provided with a generator set to drive a high-pressure pump, and the grass seeds wrapped with the nutrient slurry are uniformly embedded and sown into the soil sprayed with the root-promoting nutrient solution under the action of pressure; then evenly spraying and covering the nutrient slurry without the grass seeds on the nutrient slurry with the grass seeds; the spraying amount of the root promoting nutrient solution is as follows: 3 t/mu to 5 t/mu; the application amount of the nutrient slurry for wrapping the grass seeds is 3 t/mu to 5 t/mu; the application amount of the nutrient slurry not wrapped with grass seeds is 3 t/mu to 5 t/mu;
(6) and (3) fertilizer and water management: watering is started the next day after seeding, watering is carried out once a day within one week after seeding, and watering is stopped on the day of rain; after one week of sowing, the grass seeds germinate, grow out of root systems and are pricked into the soil downwards; spraying root promoting nutrient solution again after sprouting for one month, and continuing cultivation and management; after sprouting for one month, spraying the rooting-promoting nutrient solution again, wherein the application amount of the rooting-promoting nutrient solution is 300 kg/mu;
(7) and (4) replanting grass seeds in the unerupted plots or the mowed plots according to the step (5) and the step (6) until the degraded desertified grassland is repaired.
2. The method for repairing degraded desertified grassland by planting herbaceous crops by embedding the nutrient slurry in the wrapping manner according to claim 1, wherein the method for preparing the corn gruel paste in the step (2) comprises the following steps: the corn flour and normal-temperature water are mixed in equal weight for humidification, water in an amount which is 10 times of the weight of the corn flour is heated to be boiled, then the humidified corn flour is poured into the boiled water for stirring, and the corn flour porridge paste is obtained after the corn flour is boiled again and is cooled for later use.
3. The method for repairing degraded sandy grassland by planting herbaceous crops through embedding the nutrient paste in the bag as claimed in claim 1, wherein 1kg-20kg of grass seeds and 6 tons-10 tons of nutrient paste are used together for each mu of degraded grassland.
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