Planting and maintenance method for saline-alkali land farmland shelterbelt

Abstract

The invention discloses a planting and maintenance method for a saline-alkali land farmland shelterbelt, which relates to the technical field of saline-alkali land improvement. A plurality of planting trenches are dug, and Malus chufu, Fraxinus mandshurica and Elaeagnus angustifolia are planted in the planting trenches. During planting, they are arranged in a manner that Malus chufu is on the outside, Fraxinus mandshurica is in the middle, and Elaeagnus angustifolia is on the side close to the farmland. At the same time, Elymus salsa is planted between Malus chufu and Fraxinus mandshurica, and alfalfa is planted between Fraxinus mandshurica and Elaeagnus angustifolia. After the planting is completed, water is irrigated on the same day. After 7 to 10 days, trenches are dug for the planted Malus chufu, Fraxinus mandshurica and Elaeagnus angustifolia, and a saline-alkali land seedling growth agent is applied. The application depth is 15 to 20 cm. An arc-shaped trench is dug under the crown projection with the seedling as the center. The soil is covered after the application, and water is irrigated twice within 10 to 15 days. This improves the one-time survival rate of the shelterbelt seedlings and shortens the growth cycle of the seedlings. The seedlings can grow up in 2 to 3 years, with a significant effect.

Description

Technical Field

[0001] The invention relates to the technical field of saline-alkali land improvement, and in particular to a method for planting and maintaining a saline-alkali land farmland shelterbelt. Background Art

[0002] Saline-alkali land refers to land affected by natural or human factors, which causes salt substances to gradually penetrate into the soil, making the soil contain more salt and alkali, and making this type of land unusable. The main reason for the formation of saline-alkali land is that under the action of evaporation, the water in the land in relatively arid areas is evaporated into water vapor and discharged into the air, but the salt in the water cannot be eliminated and remains in the soil. After a long period of accumulation, the salt content in the soil gradually increases, thus forming saline-alkali land. Because the saline-alkali soil itself contains too much salt, according to the principle of plant cell osmosis, it is difficult for plant cells to absorb inorganic nutrients and water, resulting in the death of plants due to their own lack of inorganic nutrients and water, thereby causing a vicious cycle of saline-alkali land ecology.

[0003] Currently, the methods for improving saline-alkali land mainly include physical improvement, chemical improvement, and biological improvement. After the saline-alkali land is improved, crops can be planted, but it is necessary to strengthen the protection of cultivated land after the improvement. Saline-alkali farmland shelterbelts are a good option. They can form a natural barrier to prevent the invasion of northwest winds or north winds, and can also regulate soil moisture, increase organic matter content, and purify the soil. Chinese patent CN112314098B discloses a planting method for saline-alkali land terraced shelterbelts, which improves the effectiveness of shelterbelts and solves the problem of vegetation planting in saline-alkali areas. However, the soil treatment in the early stage is insufficient. Due to the limited salt-alkali resistance of seedlings, the survival rate of seedlings is very low, making it impossible to build a shelterbelt. At the same time, the shelterbelt formation is slow. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in view of the deficiencies in the existing technology, a method for planting and maintaining a saline-alkali farmland shelterbelt is provided, which has a high survival rate of seedlings and quickly forms the shelterbelt.

[0005] In order to solve the above technical problems, the technical solution of the present invention is:

[0006] A method for planting and maintaining a saline-alkali farmland shelterbelt comprises the following steps:

[0007] A: In autumn, from August to September, level the ground, mark out the planting area and flood irrigate the soil to a depth of 50-60cm or more;

[0008] B: When the soil moisture content reaches 18%-22%, spread well-rotted manure on the planting area, and then deep-plow the planting area to a depth of more than 30cm;

[0009] C: After the planting area has been exposed to the sun for 3-5 days, dig multiple planting trenches and plant the Malus japonica, Fraxinus mandshurica, and Elaeagnus angustifolia in the trenches. Arrange the trees with Malus japonica on the outside, Fraxinus mandshurica in the middle, and Elaeagnus angustifolia on the side close to the farmland. Plant Elymus dahliae between Malus japonica and Fraxinus mandshurica, and plant Alfalfa between Fraxinus mandshurica and Elaeagnus angustifolia.

[0010] D: Water thoroughly on the day of planting. 7-10 days later, dig trenches for the planted Begonia jellyfish, Fraxinus mandshurica, and Elaeagnus angustifolia and apply saline-alkali soil seedling growth agent at a depth of 15-20 cm. Dig an arc-shaped trench under the crown projection with the seedling as the center. Cover with soil after application and water twice within 10-15 days.

[0011] E: At the end of October, harvest alfalfa and Elymus salsa separately. Cut the stems and chopped them up and bury them completely in the soil layer between 18 and 20 cm so that the soil and the stems are tightly combined.

[0012] Preferably, the amount of decomposed manure in step B is 800-1000 kg / m 3 .

[0013] Preferably, in step C, the Zhumei crabapple seedlings are selected to be strong, lush, straight and even, disease-free and uninjured, and 30-60 cm tall, and the main branches are cut short, leaving 3-5 side branches.

[0014] Preferably, the ash seedlings are selected to be strong, lush, straight and even, disease-free and uninjured, and 60-80 cm high. The thin and weak branches and overcrowded branches are removed, and the diseased and weak roots are removed. The cut treetops are sealed with paint.

[0015] Preferably, 30-50 cm tall seedlings of Elaeagnus angustifolia are selected, and before planting, overly long roots, split roots, barkless roots, diseased branches, dead branches, and overly dense branches are cut off.

[0016] Preferably, in step C, the Begonia zhumeiensis is planted in 2 to 4 rows, the Fraxinus mandshurica is planted in 3 to 5 rows, and the Elaeagnus angustifolia is planted in 2 to 4 rows.

[0017] Preferably, in step C, the distance between the crabapple and the elm is 1.5 to 2 meters, and the distance between the elm and the angustifolia is 2 to 3 meters.

[0018] Preferably, in step E, the amount of alfalfa pressed is 1.8 to 2.2 tons per mu, and the amount of Elymus dahliae pressed is 0.9 to 1.2 tons per mu.

[0019] Preferably, the saline-alkali land seedling growth agent includes the following raw material components in weight fractions: 5-7 parts of calcite powder, 2-4 parts of pyrethrum powder, 3-5 parts of fish bone powder, 20-30 parts of corn soaking water, 8-10 parts of potassium aluminum sulfate, 5-7 parts of benzothiazole, 10-15 parts of kaolin, 4-6 parts of OP-10, and 7-10 parts of tylvalosin tartrate.

[0020] Preferably, the preparation method of the saline-alkali soil seedling growth agent comprises the following steps:

[0021] S1. Mix and grind fish bone powder, calcite powder, pyrethrum powder, potassium aluminum sulfate, benzothiazole, kaolin, and tyvalocin tartrate, and pass through a 200-300 mesh sieve to obtain a mixture;

[0022] S2. Dissolve OP-10 in corn soaking water and stir evenly to obtain a mixed solution;

[0023] S3. The mixed material is added to a top-spray boiling granulator, and the mixed liquid is used as spray droplets for agglomeration and granulation to obtain the saline-alkali land seedling growth agent.

[0024] Due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0025] 1. Through flooding, salt can seep into the deep soil along with water. In addition, the soil can be transformed with the addition of decomposed manure, which is beneficial to improving the survival rate of shelterbelts.

[0026] 2. Choose Zhumei crabapple and elm that are formed from low to high in height, which can better buffer the wind and sand, form a natural barrier, and prevent the invasion of northwest wind or north wind.

[0027] 3. Select shorter Elaeagnus angustifolia on the side close to the farmland, which will block less of the farmland. At the same time, Elaeagnus angustifolia is a shallow-rooted plant and will cause less harm to the farmland.

[0028] 4. The fallen leaves from the shelterbelt trees can increase the organic matter content in the soil and promote the growth of a large number of microorganisms in the soil. The harvested alfalfa and alkali grass and buried underground can, on the one hand, play a role in heat preservation and improve the survival rate of the shelterbelt in winter after planting. On the other hand, they can serve as green manure, provide nutrients for the growth of the shelterbelt, and are conducive to the rapid formation of the shelterbelt.

[0029] 5. The application of saline-alkali land seedling growth agent improves the one-time survival rate of shelterbelt seedlings and shortens the growth cycle of seedlings. They can grow in 2 to 3 years, with significant effects. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the embodiments.

[0031] Example 1

[0032] A method for planting and maintaining a saline-alkali farmland shelterbelt comprises the following steps:

[0033] A: In autumn, from August to September, level the ground, mark out the planting area and flood irrigate the soil to a depth of 50-60cm or more;

[0034] B: When the soil moisture content reaches 18%-22%, spread the decomposed manure in the planting area, and then deep plow the planting area to a depth of more than 30cm. The amount of decomposed manure is 800kg / m 3 ;

[0035] C: After the planting area has been exposed to the sun for 3-5 days, dig multiple planting trenches and plant the Begonia chumeiensis, Fraxinus mandshurica, and Elaeagnus angustifolia in the planting trenches. When planting, arrange the Begonia chumeiensis on the outside, Fraxinus mandshurica in the middle, and Elaeagnus angustifolia on the side close to the farmland. At the same time, plant Elymus dahliae between Begonia chumeiensis and Fraxinus mandshurica, and plant alfalfa between Fraxinus mandshurica and Elaeagnus angustifolia. Plant Begonia chumeiensis in 2 rows, Fraxinus mandshurica in 3 rows, and Elaeagnus angustifolia in 2 rows. The spacing between Begonia chumeiensis and Fraxinus mandshurica is 1.5m, and the spacing between Fraxinus mandshurica and Elaeagnus angustifolia is 2m.

[0036] Among them, the Zhumei crabapple seedlings are selected, which are strong, lush, straight and even, disease-free, and 30-60cm tall. The main branches are cut short, and 3-5 side branches are retained.

[0037] Select strong, lush, straight and evenly distributed ash seedlings with no disease or injury, 60-80cm tall, remove weak and dense branches, remove diseased and weak roots, and seal the cut treetops with paint.

[0038] Select 30-50cm tall seedlings of Elaeagnus angustifolia and cut off any long roots, split roots, barkless roots, diseased branches, dead branches, or overly dense branches before planting.

[0039] D: Water thoroughly on the day of planting. 7-10 days later, dig trenches for the planted Begonia jellyfish, Fraxinus mandshurica, and Elaeagnus angustifolia and apply saline-alkali soil seedling growth agent at a depth of 15-20 cm. Dig an arc-shaped trench under the crown projection with the seedling as the center. Cover with soil after application and water twice within 10-15 days.

[0040] E: At the end of October, harvest alfalfa and Elymus salsa separately. Cut the stems and chopped them into pieces and bury them completely in the soil layer between 18 and 20 cm, so that the soil and the stems are tightly combined. The amount of alfalfa to be turned over is 1.8 to 2.2 tons per mu, and the amount of Elymus salsa to be turned over is 0.9 to 1.2 tons per mu.

[0041] The saline-alkali land seedling growth agent comprises the following raw material components in weight fractions: 5 parts of calcite powder, 2 parts of pyrethrum powder, 3 parts of fish bone powder, 20 parts of corn soaking water, 8 parts of potassium aluminum sulfate, 5 parts of benzothiazole, 10 parts of kaolin, 4 parts of OP-10, and 7 parts of tylvalosin tartrate.

[0042] The preparation method of the saline-alkali soil seedling growth agent comprises the following steps:

[0043] S1. Mix and grind fish bone powder, calcite powder, pyrethrum powder, potassium aluminum sulfate, benzothiazole, kaolin, and tyvalocin tartrate, and pass through a 200-300 mesh sieve to obtain a mixture;

[0044] S2. Dissolve OP-10 in corn soaking water and stir evenly to obtain a mixed solution;

[0045] S3. The mixed material is added to a top-spray boiling granulator, and the mixed liquid is used as spray droplets for agglomeration and granulation to obtain the saline-alkali land seedling growth agent.

[0046] Example 2

[0047] A method for planting and maintaining a saline-alkali farmland shelterbelt comprises the following steps:

[0048] A: In autumn, from August to September, level the ground, mark out the planting area and flood irrigate the soil to a depth of 50-60cm or more;

[0049] B: When the soil moisture content reaches 18%-22%, spread the decomposed manure in the planting area, and then deep plow the planting area to a depth of more than 30cm. The amount of decomposed manure is 900kg / m 3 ;

[0050] C: After the planting area has been exposed to the sun for 3-5 days, dig multiple planting trenches and plant the Malus japonica, Fraxinus mandshurica, and Elaeagnus angustifolia in the planting trenches. When planting, arrange the Malus japonica on the outside, Fraxinus mandshurica in the middle, and Elaeagnus angustifolia on the side close to the farmland. At the same time, plant Elymus dahliae between Malus japonica and Fraxinus mandshurica, and plant alfalfa between Fraxinus mandshurica and Elaeagnus angustifolia. Plant 3 rows of Malus japonica, 4 rows of Fraxinus mandshurica, and 3 rows of Elaeagnus angustifolia. There is a 2m interval between Malus japonica and Fraxinus mandshurica, and a 2.5m interval between Fraxinus mandshurica and Elaeagnus angustifolia.

[0051] Among them, the Zhumei crabapple seedlings are selected, which are strong, lush, straight and even, disease-free, and 30-60cm tall. The main branches are cut short, and 3-5 side branches are retained.

[0052] Select strong, lush, straight and evenly distributed ash seedlings with no disease or injury, 60-80cm tall, remove weak and dense branches, remove diseased and weak roots, and seal the cut treetops with paint.

[0053] Select 30-50cm tall seedlings of Elaeagnus angustifolia and cut off any long roots, split roots, barkless roots, diseased branches, dead branches, or overly dense branches before planting.

[0054] D: Water thoroughly on the day of planting. 7-10 days later, dig trenches for the planted Begonia jellyfish, Fraxinus mandshurica, and Elaeagnus angustifolia and apply saline-alkali soil seedling growth agent at a depth of 15-20 cm. Dig an arc-shaped trench under the crown projection with the seedling as the center. Cover with soil after application and water twice within 10-15 days.

[0055] E: At the end of October, harvest alfalfa and Elymus salsa separately. Cut the stems and chopped them into pieces and bury them completely in the soil layer between 18 and 20 cm, so that the soil and the stems are tightly combined. The amount of alfalfa to be turned over is 1.8 to 2.2 tons per mu, and the amount of Elymus salsa to be turned over is 0.9 to 1.2 tons per mu.

[0056] The saline-alkali land seedling growth agent comprises the following raw material components in weight fractions: 6 parts of calcite powder, 3 parts of pyrethrum powder, 4 parts of fish bone powder, 25 parts of corn soaking water, 9 parts of potassium aluminum sulfate, 6 parts of benzothiazole, 12 parts of kaolin, 5 parts of OP-10, and 8 parts of tylvalosin tartrate.

[0057] The preparation method of the saline-alkali soil seedling growth agent comprises the following steps:

[0058] S1. Mix and grind fish bone powder, calcite powder, pyrethrum powder, potassium aluminum sulfate, benzothiazole, kaolin, and tyvalocin tartrate, and pass through a 200-300 mesh sieve to obtain a mixture;

[0059] S2. Dissolve OP-10 in corn soaking water and stir evenly to obtain a mixed solution;

[0060] S3. The mixed material is added to a top-spray boiling granulator, and the mixed liquid is used as spray droplets for agglomeration and granulation to obtain the saline-alkali land seedling growth agent.

[0061] Example 3

[0062] A method for planting and maintaining a saline-alkali farmland shelterbelt comprises the following steps:

[0063] A: In autumn, from August to September, level the ground, mark out the planting area and flood irrigate the soil to a depth of 50-60cm or more;

[0064] B: When the soil moisture content reaches 18%-22%, spread the decomposed manure in the planting area, and then deep plow the planting area to a depth of more than 30cm. The amount of decomposed manure is 1000kg / m 3 ;

[0065] C: After the planting area has been exposed to the sun for 3-5 days, dig multiple planting trenches and plant the Malus japonica, Fraxinus mandshurica, and Elaeagnus angustifolia in the planting trenches. When planting, arrange the Malus japonica on the outside, Fraxinus mandshurica in the middle, and Elaeagnus angustifolia on the side close to the farmland. At the same time, plant Elymus dahliae between Malus japonica and Fraxinus mandshurica, and plant alfalfa between Fraxinus mandshurica and Elaeagnus angustifolia. Plant 4 rows of Malus japonica, 5 rows of Fraxinus mandshurica, and 4 rows of Elaeagnus angustifolia. There is a 2m interval between Malus japonica and Fraxinus mandshurica, and a 3m interval between Fraxinus mandshurica and Elaeagnus angustifolia.

[0066] Among them, the Zhumei crabapple seedlings are selected, which are strong, lush, straight and even, disease-free, and 30-60cm tall. The main branches are cut short, and 3-5 side branches are retained.

[0067] Select strong, lush, straight and evenly distributed ash seedlings with no disease or injury, 60-80cm tall, remove weak and dense branches, remove diseased and weak roots, and seal the cut treetops with paint.

[0068] Select 30-50cm tall seedlings of Elaeagnus angustifolia and cut off any long roots, split roots, barkless roots, diseased branches, dead branches, or overly dense branches before planting.

[0069] D: Water thoroughly on the day of planting. 7-10 days later, dig trenches for the planted Begonia jellyfish, Fraxinus mandshurica, and Elaeagnus angustifolia and apply saline-alkali soil seedling growth agent at a depth of 15-20 cm. Dig an arc-shaped trench under the crown projection with the seedling as the center. Cover with soil after application and water twice within 10-15 days.

[0070] E: At the end of October, harvest alfalfa and Elymus salsa separately. Cut the stems and chopped them into pieces and bury them completely in the soil layer between 18 and 20 cm, so that the soil and the stems are tightly combined. The amount of alfalfa to be turned over is 1.8 to 2.2 tons per mu, and the amount of Elymus salsa to be turned over is 0.9 to 1.2 tons per mu.

[0071] The saline-alkali land seedling growth agent comprises the following raw material components in weight fractions: 7 parts of calcite powder, 4 parts of pyrethrum powder, 5 parts of fish bone powder, 30 parts of corn soaking water, 10 parts of potassium aluminum sulfate, 7 parts of benzothiazole, 15 parts of kaolin, 6 parts of OP-10, and 10 parts of tylvalosin tartrate.

[0072] The preparation method of the saline-alkali soil seedling growth agent comprises the following steps:

[0073] S1. Mix and grind fish bone powder, calcite powder, pyrethrum powder, potassium aluminum sulfate, benzothiazole, kaolin, and tyvalocin tartrate, and pass through a 200-300 mesh sieve to obtain a mixture;

[0074] S2. Dissolve OP-10 in corn soaking water and stir evenly to obtain a mixed solution;

[0075] S3. The mixed material is added to a top-spray boiling granulator, and the mixed liquid is used as spray droplets for agglomeration and granulation to obtain the saline-alkali land seedling growth agent.

[0076] Example 4

[0077] A method for planting and maintaining a saline-alkali farmland shelterbelt comprises the following steps:

[0078] A: In autumn, from August to September, level the ground, mark out the planting area and flood irrigate the soil to a depth of 50-60cm or more;

[0079] B: When the soil moisture content reaches 18%-22%, spread the decomposed manure in the planting area, and then deep plow the planting area to a depth of more than 30cm. The amount of decomposed manure is 1000kg / m 3 ;

[0080] C: After the planting area has been exposed to the sun for 3-5 days, dig multiple planting trenches and plant the Malus japonica, Fraxinus mandshurica, and Elaeagnus angustifolia in the planting trenches. When planting, arrange the Malus japonica on the outside, Fraxinus mandshurica in the middle, and Elaeagnus angustifolia on the side close to the farmland. At the same time, plant Elymus dahliae between Malus japonica and Fraxinus mandshurica, and plant alfalfa between Fraxinus mandshurica and Elaeagnus angustifolia. Plant 3 rows of Malus japonica, 5 rows of Fraxinus mandshurica, and 3 rows of Elaeagnus angustifolia. There is a 2m interval between Malus japonica and Fraxinus mandshurica, and a 3m interval between Fraxinus mandshurica and Elaeagnus angustifolia.

[0081] Among them, the Zhumei crabapple seedlings are selected, which are strong, lush, straight and even, disease-free, and 30-60cm tall. The main branches are cut short, and 3-5 side branches are retained.

[0082] Select strong, lush, straight and evenly distributed ash seedlings with no disease or injury, 60-80cm tall, remove weak and dense branches, remove diseased and weak roots, and seal the cut treetops with paint.

[0083] Select 30-50cm tall seedlings of Elaeagnus angustifolia and cut off any long roots, split roots, barkless roots, diseased branches, dead branches, or overly dense branches before planting.

[0084] D: Water thoroughly on the day of planting. 7-10 days later, dig trenches for the planted Begonia jellyfish, Fraxinus mandshurica, and Elaeagnus angustifolia and apply saline-alkali soil seedling growth agent at a depth of 15-20 cm. Dig an arc-shaped trench under the crown projection with the seedling as the center. Cover with soil after application and water twice within 10-15 days.

[0085] E: At the end of October, harvest alfalfa and Elymus salsa separately. Cut the stems and chopped them into pieces and bury them completely in the soil layer between 18 and 20 cm, so that the soil and the stems are tightly combined. The amount of alfalfa to be turned over is 1.8 to 2.2 tons per mu, and the amount of Elymus salsa to be turned over is 0.9 to 1.2 tons per mu.

[0086] The saline-alkali land seedling growth agent comprises the following raw material components in weight fractions: 5-7 parts of calcite powder, 2-4 parts of pyrethrum powder, 3-5 parts of fish bone powder, 20-30 parts of corn soaking water, 8-10 parts of potassium aluminum sulfate, 5-7 parts of benzothiazole, 10-15 parts of kaolin, 4-6 parts of OP-10, and 7-10 parts of tylvalosin tartrate.

[0087] The preparation method of the saline-alkali soil seedling growth agent comprises the following steps:

[0088] S1. Mix and grind fish bone powder, calcite powder, pyrethrum powder, potassium aluminum sulfate, benzothiazole, kaolin, and tyvalocin tartrate, and pass through a 200-300 mesh sieve to obtain a mixture;

[0089] S2. Dissolve OP-10 in corn soaking water and stir evenly to obtain a mixed solution;

[0090] S3. The mixed material is added to a top-spray boiling granulator, and the mixed liquid is used as spray droplets for agglomeration and granulation to obtain the saline-alkali land seedling growth agent.

[0091] Control group 1

[0092] A method for planting and maintaining a saline-alkali farmland shelterbelt comprises the following steps:

[0093] A: In autumn, from August to September, level the ground, mark out the planting area and flood irrigate the soil to a depth of 50-60cm or more;

[0094] B: When the soil moisture content reaches 18%-22%, spread the decomposed manure in the planting area, and then deep plow the planting area to a depth of more than 30cm. The amount of decomposed manure is 800-1000kg / m 3 ;

[0095] C: After the planting area has been exposed to the sun for 3-5 days, dig multiple planting trenches and plant the Begonia chumeiensis, Fraxinus mandshurica, and Elaeagnus angustifolia in the planting trenches. When planting, arrange the Begonia chumeiensis on the outside, Fraxinus mandshurica in the middle, and Elaeagnus angustifolia on the side close to the farmland. At the same time, plant Elymus dahliae between Begonia chumeiensis and Fraxinus mandshurica, and plant alfalfa between Fraxinus mandshurica and Elaeagnus angustifolia. Plant Begonia chumeiensis in 2-4 rows, Fraxinus mandshurica in 3-5 rows, and Elaeagnus angustifolia in 2-4 rows. The spacing between Begonia chumeiensis and Fraxinus mandshurica is 1.5-2m, and the spacing between Fraxinus mandshurica and Elaeagnus angustifolia is 2-3m.

[0096] Among them, the Zhumei crabapple seedlings are selected, which are strong, lush, straight and even, disease-free, and 30-60cm tall. The main branches are cut short, and 3-5 side branches are retained.

[0097] Select strong, lush, straight and evenly distributed ash seedlings with no disease or injury, 60-80cm tall, remove weak and dense branches, remove diseased and weak roots, and seal the cut treetops with paint.

[0098] Select 30-50cm tall seedlings of Elaeagnus angustifolia and cut off any long roots, split roots, barkless roots, diseased branches, dead branches, or overly dense branches before planting.

[0099] D: Water thoroughly on the day of planting, and then water twice within 10 to 15 days;

[0100] E: At the end of October, harvest alfalfa and Elymus salsa separately. Cut the stems and chopped them into pieces and bury them completely in the soil layer between 18 and 20 cm, so that the soil and the stems are tightly combined. The amount of alfalfa to be turned over is 1.8 to 2.2 tons per mu, and the amount of Elymus salsa to be turned over is 0.9 to 1.2 tons per mu.

[0101] Control group 2

[0102] A method for planting and maintaining a saline-alkali farmland shelterbelt comprises the following steps:

[0103] A: In autumn, from August to September, level the ground, mark out the planting area and flood irrigate the soil to a depth of 50-60cm or more;

[0104] B: When the soil moisture content reaches 18%-22%, spread the decomposed manure in the planting area, and then deep plow the planting area to a depth of more than 30cm. The amount of decomposed manure is 800-1000kg / m 3 ;

[0105] C: After the planting area has been exposed to the sun for 3-5 days, dig multiple planting trenches and plant the Begonia chumeiensis, Fraxinus mandshurica, and Elaeagnus angustifolia in the planting trenches. When planting, arrange the Begonia chumeiensis on the outside, Fraxinus mandshurica in the middle, and Elaeagnus angustifolia on the side close to the farmland. At the same time, plant Elymus dahliae between Begonia chumeiensis and Fraxinus mandshurica, and plant alfalfa between Fraxinus mandshurica and Elaeagnus angustifolia. Plant Begonia chumeiensis in 2-4 rows, Fraxinus mandshurica in 3-5 rows, and Elaeagnus angustifolia in 2-4 rows. The spacing between Begonia chumeiensis and Fraxinus mandshurica is 1.5-2m, and the spacing between Fraxinus mandshurica and Elaeagnus angustifolia is 2-3m.

[0106] Among them, the Zhumei crabapple seedlings are selected, which are strong, lush, straight and even, disease-free, and 30-60cm tall. The main branches are cut short, and 3-5 side branches are retained.

[0107] Select strong, lush, straight and evenly distributed ash seedlings with no disease or injury, 60-80cm tall, remove weak and dense branches, remove diseased and weak roots, and seal the cut treetops with paint.

[0108] Select 30-50cm tall seedlings of Elaeagnus angustifolia and cut off any long roots, split roots, barkless roots, diseased branches, dead branches, or overly dense branches before planting.

[0109] D: Water thoroughly on the day of planting. 7-10 days later, dig trenches and apply carbonase root activation produced by British Gould Agrochemical Co., Ltd. to the planted Begonia, Manchurian ash and Elaeagnus angustifolia. The application depth is 15-20 cm. Dig an arc-shaped trench under the canopy projection with the seedling as the center. Cover with soil after application. Water twice within 10-15 days.

[0110] E: At the end of October, harvest alfalfa and Elymus salsa separately. Cut the stems and chopped them into pieces and bury them completely in the soil layer between 18 and 20 cm, so that the soil and the stems are tightly combined. The amount of alfalfa to be turned over is 1.8 to 2.2 tons per mu, and the amount of Elymus salsa to be turned over is 0.9 to 1.2 tons per mu.

[0111] Six experimental plots covering 600 square meters of saline-alkali land in the coastal area of Weifang, Shandong Province were selected. The soil properties at a depth of 15 cm were measured and found to be: pH: 8.2, moisture content: 10.2%, total nitrogen content: 0.068%, total phosphorus content: 0.15%, and total potassium content: 1.58%. Examples 1-4, in which a saline-alkali land seedling growth agent was applied, were used as the experimental group. No saline-alkali land seedling growth agent was applied as the control group 1. A carbonase root activator produced by the British Gould Agrochemical Co., Ltd. was applied as the control group 2. The soil properties at a depth of 15 cm were tested every 6 months, and the following results were obtained:

[0112] Through embodiment and comparative example, obtain the following result:

[0113] Table 1

[0114]

[0115]

[0116] It can be seen from the table that the application of the saline-alkali land seedling growth agent of the present invention is conducive to the rapid formation of the shelterbelt, the seedlings grow fast, the survival rate is high, and the wind and sand protection effect is better.

[0117] It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the appended claims of the application.

Claims

1. A method for planting and maintaining a saline-alkali farmland shelterbelt, characterized in that The following steps are involved: A: In autumn, from August to September, level the ground, mark out the planting area and flood irrigate the soil to a depth of 50-60cm or more; B: When the soil moisture content reaches 18%-22%, spread well-rotted manure on the planting area, and then deep-plow the planting area to a depth of more than 30cm; C: After the planting area has been exposed to the sun for 3-5 days, dig multiple planting trenches and plant the Malus japonica, Fraxinus mandshurica, and Elaeagnus angustifolia in the trenches. Arrange the trees with Malus japonica on the outside, Fraxinus mandshurica in the middle, and Elaeagnus angustifolia on the side close to the farmland. Plant Elymus dahliae between Malus japonica and Fraxinus mandshurica, and plant Alfalfa between Fraxinus mandshurica and Elaeagnus angustifolia. D: Water thoroughly on the day of planting. 7-10 days later, dig trenches for the planted Begonia jellyfish, Fraxinus mandshurica, and Elaeagnus angustifolia and apply saline-alkali soil seedling growth agent at a depth of 15-20 cm. Dig an arc-shaped trench under the crown projection with the seedling as the center. Cover with soil after application and water twice within 10-15 days. E: At the end of October, harvest alfalfa and Elymus salsa separately. Cut the stems and chopped them up and bury them completely in the soil layer between 18 and 20 cm so that the soil and the stems are tightly combined.

2. The method for planting and maintaining a saline-alkali farmland shelterbelt according to claim 1, wherein: The amount of decomposed manure in step B is 800-1000kg / m 3 .

3. The method for planting and maintaining a saline-alkali farmland shelterbelt according to claim 1, wherein: In step C, select strong, lush, straight and evenly planted, disease-free, and 30-60 cm tall Zhumei crabapple seedlings, cut the main branches short, and retain 3-5 side branches.

4. The method for planting and maintaining a saline-alkali farmland shelterbelt according to claim 1, wherein: For elm, select strong, lush, straight and even-proportioned elm seedlings without any disease or injury, and 60-80cm in height. Remove weak and overly dense branches, and remove diseased and weak roots. Seal the cut treetops with paint.

5. The method for planting and maintaining a saline-alkali farmland shelterbelt according to claim 1, wherein: Select 30-50cm tall seedlings of Elaeagnus angustifolia and cut off any overly long roots, split roots, barkless roots, diseased branches, dead branches, or overly dense branches before planting.

6. The method for planting and maintaining a saline-alkali farmland shelterbelt according to claim 1, wherein: In step C, the Zhumei crabapple is planted in 2 to 4 rows, the Manchurian elm is planted in 3 to 5 rows, and the Elaeagnus angustifolia is planted in 2 to 4 rows.

7. The method for planting and maintaining a saline-alkali farmland shelterbelt according to claim 1, wherein: In step C, the distance between the crabapple and the elm is 1.5 to 2 meters, and the distance between the elm and the sand date is 2 to 3 meters.

8. The method for planting and maintaining a saline-alkali farmland shelterbelt according to claim 1, wherein: In step E, the amount of alfalfa pressed is 1.8 to 2.2 tons per mu, and the amount of Elymus dahliae pressed is 0.9 to 1.2 tons per mu.

9. The method for planting and maintaining a saline-alkali farmland shelterbelt according to claim 1, wherein: The saline-alkali land seedling growth agent comprises the following raw material components in weight fractions: 5-7 parts of calcite powder, 2-4 parts of pyrethrum powder, 3-5 parts of fish bone powder, 20-30 parts of corn soaking water, 8-10 parts of potassium aluminum sulfate, 5-7 parts of benzothiazole, 10-15 parts of kaolin, 4-6 parts of OP-10, and 7-10 parts of tylvalosin tartrate.

10. The method for planting and maintaining a saline-alkali farmland shelterbelt according to claim 9, wherein: The preparation method of the saline-alkali soil seedling growth agent comprises the following steps: S1. Mix and grind fish bone powder, calcite powder, pyrethrum powder, potassium aluminum sulfate, benzothiazole, kaolin, and tyvalocin tartrate, and pass through a 200-300 mesh sieve to obtain a mixture; S2. Dissolve OP-10 in corn soaking water and stir evenly to obtain a mixed solution; S3. The mixed material is added to a top-spray boiling granulator, and the mixed liquid is used as spray droplets for agglomeration and granulation to obtain the saline-alkali land seedling growth agent.

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