Method suitable for planting cotton in medium-height saline-alkali soil in Xinjiang and application

Abstract

The invention relates to the technical field of cotton planting, in particular to a method suitable for planting cotton in medium-height saline-alkali soil in Xinjiang and application. The method comprises the following steps: (1) dividing the medium-height saline-alkali soil in Xinjiang into a planting area and a salt elimination area which are adjacent in sequence; the width of each planting area is 50-193cm, and the width of each salt elimination area is 40-65cm; (2) laying a drip irrigation tape on the planting area, and covering with a mulching film at the same time; before cotton is planted, a drip irrigation tape is used for dripping water in the planting area 2-4 times, and the water dripping amount each time is 15-32 cubic meters per mu; the time interval between two adjacent times of water dripping is 5-10 days; (3) after the last time of water dripping is completed for 5-10 days, punching holes penetrating through the mulching film, and sowing cotton seeds in the holes. According to the method, ridging is not needed, the drip irrigation belts are laid on the flat ground, the mulching film is covered, and 1-4 drip irrigation belts are laid under the mulching film, so that the emergence rate of the cotton in the medium-high saline-alkali soil can be increased, and the yield of the cotton is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of cotton planting, and in particular to a method and application suitable for planting cotton in moderate to high saline-alkali lands in Xinjiang. Background Art

[0002] Saline-alkali land refers to areas where the soil contains excessive salt. More than 80% of my country's saline-alkali land is located in Xinjiang, where the soil salt content is ≥ 0.1%. High salt content in the soil will destroy the soil structure, thereby affecting the soil's air permeability and water retention, making the soil prone to drought and flooding, and unsuitable for crop growth.

[0003] With the advancement of science and technology and the development of society, the value of cotton has been continuously enriched. Cotton is not only a fiber crop, but also an oil crop, a feed crop, and a fuel crop, and is known as "white gold". Cotton is drought-resistant and salt-alkali-tolerant, and is planted in large quantities in Xinjiang. However, due to the high salinity of the soil in Xinjiang, the emergence rate and yield of the planted cotton will be affected. A planting method that can improve the current status of saline-alkali land in Xinjiang and increase the emergence rate and yield of cotton is urgently needed. Summary of the invention

[0004] The purpose of the present invention is to provide a method and application suitable for planting cotton in moderate to high saline-alkali land in Xinjiang.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0006] The present invention provides a method for planting cotton in moderate to severe saline-alkali land in Xinjiang, comprising the following steps:

[0007] (1) Divide the moderately saline-alkali land in Xinjiang into adjacent planting areas and salt drainage areas; the width of each planting area is 50 to 193 cm, and the width of each salt drainage area is 40 to 65 cm;

[0008] (2) Drip irrigation tape is laid on the planting area and covered with mulch film; before planting cotton, the drip irrigation tape is used to drip water on the planting area 2 to 4 times, with each dripping amount of 15 to 32 cubic meters per mu; the time interval between two adjacent drippings is 5 to 10 days;

[0009] (3) 5 to 10 days after the last dripping, holes are punched through the mulch film and cotton seeds are sown in the holes.

[0010] Preferably, the row spacing of cotton planted in step (3) is 8 to 66 cm, and 2 to 6 rows are planted in each planting area.

[0011] Preferably, the spacing between cotton plants in step (3) is 8 to 15 cm.

[0012] Preferably, the sowing rate of cotton seeds in step (3) is 1.4 to 3.6 kg / mu.

[0013] Preferably, 1 to 2 cotton seeds are sown in each hole.

[0014] Preferably, the number of cotton seeds sown per mu is 11,000 to 20,000 plants per mu.

[0015] The invention also provides cotton planted by the method, wherein the emergence rate of the cotton is ≥72%.

[0016] The invention also provides application of the method in improving the emergence rate of cotton in medium to high saline-alkali land in Xinjiang.

[0017] The invention also provides application of the method in improving the yield of cotton in moderately and highly saline-alkali lands in Xinjiang.

[0018] The present invention provides a method and application suitable for planting cotton in moderately high saline-alkali land in Xinjiang. The present invention provides a method suitable for planting cotton in moderately high saline-alkali land in Xinjiang, comprising the following steps: (1) Dividing moderately high saline-alkali land in Xinjiang into adjacent planting areas and salt drainage areas; the width of each planting area is 50 to 193 cm, and the width of each salt drainage area is 40 to 65 cm; (2) Laying a drip irrigation belt on the planting area and covering it with a ground film; Before planting cotton, use the drip irrigation belt to drip water in the planting area 2 to 4 times, and the amount of each drip is 15 to 32 cubic meters per mu; The time interval between two adjacent drips is 5 to 10 days; (3) 5 to 10 days after the last dripping, drilling holes through the ground film, and sowing cotton seeds in the holes. The method of the present invention drips water through the drip irrigation belt, and the water drives the movement of salt in the soil covered with the ground film. After each drip irrigation belt supplies water, the moisture in the soil of the planting area covered with the ground film increases, and the moisture flows to the salt drainage area not covered with the ground film. The moisture in the salt drainage area evaporates, and the salt remains. The planting area covered with mulch is blocked by the mulch, so that water flows to the salt-draining area not covered with mulch. The salt comes to the salt-draining area not covered with mulch with water, and the water evaporates. The salt remains in the salt-draining area not covered with mulch, forming salt enrichment. This cycle is repeated once or multiple times. As the water in the salt-draining area evaporates, the salt in the planting area gradually flows to the salt-draining area. The improved method of the present invention does not require ridge formation. It adopts the method of directly laying drip irrigation belts and mulch on flat ground, which is convenient for machine operation and greatly improves the efficiency of mechanical film laying and drip irrigation belt laying. This method can greatly reduce the salt content of medium and high saline-alkali land in Xinjiang, making the planting area suitable for crop growth. Planting cotton in medium and high saline-alkali land in Xinjiang using this method can significantly improve the cotton emergence rate and yield, providing a new idea for planting cotton in medium and high saline-alkali land in Xinjiang. DETAILED DESCRIPTION

[0019] The present invention provides a method for planting cotton in moderate to severe saline-alkali land in Xinjiang, comprising the following steps:

[0020] (1) Divide the moderately saline-alkali land in Xinjiang into adjacent planting areas and salt drainage areas; the width of each planting area is 50 to 193 cm, and the width of each salt drainage area is 40 to 65 cm;

[0021] (2) Drip irrigation tape is laid on the planting area and covered with mulch film; before planting cotton, the drip irrigation tape is used to drip water on the planting area 2 to 4 times, with each dripping amount of 15 to 32 cubic meters per mu; the time interval between two adjacent drippings is 5 to 10 days;

[0022] (3) 5 to 10 days after the last dripping, holes are punched through the mulch film and cotton seeds are sown in the holes.

[0023] In the present invention, when a 70cm wide mulch film is used, the width of the planting area is preferably 50-58cm, more preferably 52cm, and the width of the salt-drainage zone is preferably 40cm; when a 90cm wide mulch film is used, the width of the planting area is preferably 70-78cm, more preferably 72cm, and the width of the salt-drainage zone is 45cm; when a 125cm wide mulch film is used, the width of the planting area is preferably 105-113cm, more preferably 107cm, and the width of the salt-drainage zone is preferably 45cm; when a 145cm wide mulch film is used, the width of the planting area is preferably 125-133cm, more preferably 127cm, and the width of the salt-drainage zone is preferably 55cm; when a 165cm wide mulch film is used, the width of the planting area is preferably 145-153cm, more preferably 147cm, and the width of the salt-drainage zone is preferably 55cm; when a 205cm wide mulch film is used, the width of the planting area is preferably 185-193cm, more preferably 190cm, and the width of the salt-drainage zone is preferably 65cm.

[0024] In the present invention, when laying the drip tape, the interval between adjacent drippers is 200 mm, and the flow rate of the drip tape is 1.8 to 3.2 L / h; the drip tape is laid in 1 to 4 strips per film, preferably 3 strips; the number of dripping times is preferably 3 times; the amount of water dripped each time is preferably 28 cubic meters per mu; the time interval between two adjacent dripping times is preferably 7 days.

[0025] In the present invention, the time for sowing cotton seeds is preferably 7 days after the last drip irrigation is completed and the salt content in the soil of the planting area is ≤5.8‰.

[0026] In the present invention, when a 70cm wide mulch film is used, the planting method for sowing cotton seeds is 2 rows per film, the row spacing is 25 to 35cm, preferably 30cm, and the plant spacing is 8 to 15cm, preferably 10cm. The drip irrigation tape is laid in the middle of the planting row, and 1 row is laid. When a 90cm wide mulch film is used, the planting method for sowing cotton is 3 rows per film, the row spacing is 20 to 30cm, preferably 25cm, the plant spacing is 8 to 15cm, preferably 10cm, and the drip irrigation tape is laid in the middle of the adjacent planting rows, and 2 rows are laid. When a 125cm wide mulch film is used, the method for sowing cotton is 4 rows per film, wide and narrow rows are sown, and 2 narrow rows and one wide row. The row spacing of the wide row is 63 to 66cm, preferably 65cm; the row spacing of the narrow row is 8 to 12cm, preferably 10cm, and the drip irrigation tape is laid in the wide row, and the drip irrigation tape is 5 to 15cm away from the nearest planting row, preferably 10cm, and 2 drip irrigation tapes are laid. When using a 145 cm wide mulch film, the cotton is sown in 5 rows per film, with a row spacing of 20 to 25 cm, preferably 22 cm, and a plant spacing of 8 to 15 cm, preferably 10 cm. The drip irrigation tape is laid between the 2nd and 3rd sowing rows and between the 4th and 5th sowing rows, and 2 rows are laid. When using a 165 cm wide mulch film, the cotton is sown in 6 rows per film, with wide and narrow rows sown, with a wide row spacing of 60 to 62 cm, preferably 60 cm, a narrow row spacing of 8 to 10 cm, preferably 9 cm, and a plant spacing of 8 to 15 cm, preferably 10 cm. The drip irrigation tape is laid between two wide rows, and 2 drip irrigation tapes are laid. When using a 205 cm wide ground film, cotton is sown in 6 rows per film, with wide and narrow rows sown. The row spacing of wide rows is 62-66 cm, preferably 63 cm, the row spacing of narrow rows is 10-13 cm, preferably 12 cm, and the plant spacing is 8-13 cm, preferably 12 cm. The drip irrigation tape is laid in the middle of the wide row, and 3 drip irrigation tapes are laid.

[0027] In the present invention, the sowing amount of cotton seeds in step (3) is 1.4-3.6 kg / mu, preferably 2.8 kg / mu.

[0028] In the present invention, 1 to 2 cotton seeds are sown in each hole, preferably 1 seed.

[0029] In the present invention, the number of cotton seeds sown per mu is 11,000 to 20,000 plants / mu, preferably 15,000 plants / mu.

[0030] The invention also provides cotton planted by the method, wherein the emergence rate of the cotton is ≥72%.

[0031] The invention also provides application of the method in improving the emergence rate of cotton in medium to high saline-alkali land in Xinjiang.

[0032] The invention also provides application of the method in improving the yield of cotton in moderately and highly saline-alkali lands in Xinjiang.

[0033] The solutions provided by the present invention are described in detail below in conjunction with the embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0034] Example 1

[0035] The cotton base of the 31st Regiment of the 2nd Division of the Xinjiang Production and Construction Corps was selected for the experiment. The soil layer of 0-20 cm of the base was selected for measurement, and the salt content of the soil in the base was 12.71 g / kg. The planting site was randomly divided into 2 groups, Example 1 group and control group.

[0036] The planting method of Example 1 group is: plowing the planting land with a plowing depth of 30cm to obtain the land to be treated. The land to be treated is divided into adjacent planting areas and salt drainage areas, that is, the planting area, salt drainage area, planting area, and salt drainage area are arranged in sequence, and the width of the planting area is set to 185cm, and the width of the salt drainage area is set to 65cm. The drip irrigation tape and ground film are laid in the planting area using a drip irrigation tape and ground film all-in-one machine. The interval between adjacent drippers of the laid drip irrigation tape is 200mm, the dripper flow is set to 2.0L / h, the width of the ground film is 205cm, and the ground film is pressed with soil for 10cm on both sides. The drip irrigation tape is laid in 3 rows. The sowing method set in the planting area is one film and 6 rows, wide and narrow row sowing, the narrow row is set to 13cm, the wide row is set to 63cm, the drip irrigation tape is set in two wide rows, and two drip irrigation tapes are set in one wide row. 18 days before sowing cotton, lay the drip irrigation belt and mulch film, turn on the drip irrigation belt, and use the drip irrigation belt to drip water to the planting area. The dripping amount is 30 cubic meters per mu, and drip water again every 9 days. The dripping water is fresh water.

[0037] After drip irrigation twice, that is, on the 9th day after the last drip irrigation, the soil from 0 to 20 cm in the planting area and the soil from 0 to 20 cm in the salt drainage area were taken to test the salt content of the soil in different areas. The test results are shown in Table 1.

[0038] On the 9th day after the last drip irrigation, holes were punched through the mulch film and cotton seeds were sown in the above-mentioned wide and narrow rows. The spacing between plants was 10 cm. The cotton variety sown was Xinlu No. 71 cotton. The sowing amount was 2.0 kg / mu, 1 seed was sown in each hole, and the number of plants per mu was set to 15,000 plants / mu. The rest was treated in the conventional way. No treatment was performed in the salt drainage area.

[0039] The planting method of the control group is: plowing the land during planting, and the plowing depth is 30cm. The drip irrigation belt and mulch film machine are used to lay the drip irrigation belt and mulch film in the planting area. The interval between adjacent drippers of the laid drip irrigation belt is 200mm, the dripper flow is set to 2.0L / h, the width of the mulch film is 205cm, and the mulch film is pressed with soil for 10cm on both sides. Three drip irrigation belts are laid. The sowing method set in the planting area is one film and 6 rows, wide and narrow row sowing, the narrow row is set to 13cm, the wide row is set to 63cm, the drip irrigation belt is set in two wide rows, and two drip irrigation belts are set in one wide row. After laying, the plant spacing is set to 10cm, and Xinlu No. 71 cotton seeds are sown. The sowing amount is 2.0kg / mu, 1 seed is sown per hole, and the number of plants per mu is set to 15,000 plants / mu. The rest is handled according to the conventional method. When planting, 0-20cm soil is taken to test the salt content in the soil. The results are shown in Table 1.

[0040] During the planting process, the emergence rates of the cotton sown in the Example 1 group and the control group were statistically analyzed. The results are shown in Table 2. The emergence rate (%) = the number of emerged plants / the number of planted plants × 100%.

[0041] After the cotton was harvested, the content of seed cotton obtained by different planting methods was tested, and the results are shown in Table 2.

[0042] Table 1 Effects of different methods on the salt content in soil

[0043] project Salt content / g / kg Planting area of ​​Example 1 5.86 Salt discharge area of ​​Example 1 18.86 Control group soil 12.71

[0044] It can be seen from Table 1 that the salt content in the planting area of ​​Example 1 is lower than that in the salt-draining area of ​​Example 1, and lower than the salt content in the soil before treatment. The salt content in the salt-draining area of ​​Example 1 is higher than the salt content in the soil before treatment, which indicates that the salt content in the planting area of ​​Example 1 flows from the empty space under the edge of the mulch film to the salt-draining area along with the water.

[0045] Table 2 Effects of different planting methods on cotton yield

[0046] Group Seedling rate% Seed cotton yield / kg / mu Example 1 Group 79.6 412.1 Control group 52.2 236.7

[0047] Table 2 shows that the method of Example 1 group improves the cotton germination rate compared with the control group, and the cotton germination of Example 1 group is better than that of the control group, and the harvested seed cotton yield is higher than that of the control group. It is suitable for cotton planting in Xinjiang.

[0048] Example 2

[0049] The experiment was conducted in the cotton planting base in Shule County, Kashgar region. Soil samples from 0 to 20 cm were taken for testing, and the average salt content in the soil of the base was 14.21 g / kg.

[0050] The planting land was plowed to a depth of 30 cm to obtain the land to be treated. The land to be treated was divided into adjacent planting areas and salt drainage areas, that is, the planting area, salt drainage area, planting area, and salt drainage area were arranged in sequence. The width of the planting area was set to 55 cm, and the width of the salt drainage area was set to 40 cm. The drip irrigation tape and ground film machine was used to lay the drip irrigation tape and ground film in the planting area. The interval between adjacent drippers of the laid drip irrigation tape was 200 mm, the dripper flow was set to 2.0 L / h, the width of the ground film was 70 cm, and the ground film was pressed with soil for 7.5 cm on both sides. One drip irrigation tape was laid. The sowing method set in the planting area was one film and two rows, with a row spacing of 35 cm, and the drip irrigation tape was set in the middle of the two planting rows. 25 days before planting cotton, turn on the switch of the drip irrigation tape, and use the drip irrigation tape to drip water in the planting area. The water was fresh water, and it dripped 3 times. The first dripping has a dripping volume of 18 cubic meters per mu; 7 days after the first dripping, the second dripping starts with a dripping volume of 30 cubic meters per mu; 9 days after the second dripping, the third dripping starts with a dripping volume of 25 cubic meters per mu; 9 days after the third dripping, holes are punched on the ground film in the planting area to sow cotton seeds.

[0051] After three drippings, before sowing cotton seeds, soil from 0 to 20 cm in the planting area and 0 to 20 cm in the salt drainage area were taken to test the salt content of the soil in different areas. The test results are shown in Table 3.

[0052] On the 9th day after the third dripping, holes were punched through the mulch film, and cotton seeds were sown according to the above row spacing, with a plant spacing of 10 cm. The cotton variety sown was Xinlu Zao No. 4, the sowing amount was 1.8 kg / mu, 2 seeds were sown in each hole, and the number of plants per mu was set to 16,000 plants / mu. The rest was treated in the conventional way. No treatment was performed in the salt drainage area. The test results are shown in Table 3.

[0053] Table 3 Salt content in soils of different regions

[0054] project Salt content / g / kg Planting area 4.32 Salt discharge area 19.63

[0055] Table 3 shows that the salt content in the planting area is significantly lower than that in the salt-draining area, and is also lower than the salt content in the soil before treatment, which indicates that after using the method of the present invention, the salt in the planting area flows into the salt-draining area.

[0056] During the planting process, the emergence rate of cotton was observed and calculated according to the method of Example 1. At the time of harvest, the yield of seed cotton was counted, and the results are shown in Table 4.

[0057] Table 4 Effect of the method of Example 2 on cotton yield

[0058] Group Seedling rate% Seed cotton yield / kg / mu Example 2 Group 82.2 435.7

[0059] Table 4 shows that the method of Example 2 can make the emergence rate of Xintami No. 4 cotton reach 76%, and the seed cotton yield is as high as 435.7 kg / mu, which is suitable for cotton planting in Xinjiang.

[0060] Example 3

[0061] The experiment was conducted at a planting base in Awati County, Aksu Prefecture. The soil layer from 0 to 20 cm was measured, and the salt content in the soil was 16.6 g / kg.

[0062] The planting land was plowed to a depth of 30 cm to obtain the land to be treated. The land to be treated was divided into adjacent planting areas and salt drainage areas, that is, the planting area, salt drainage area, planting area, and salt drainage area were arranged in sequence. The width of the planting area was set to 190 cm, and the width of the salt drainage area was set to 65 cm. The drip irrigation tape and ground film were laid in the planting area using a drip irrigation tape and ground film all-in-one machine. The interval between adjacent drippers of the laid drip irrigation tape was 200 mm, the dripper flow was set to 3.2 L / h, the width of the ground film was 205 cm, and the ground film was pressed with soil for 7.5 cm on both sides. The drip irrigation tape was laid in 3 rows. The sowing method set in the planting area is one film and 6 rows, wide and narrow row sowing, the narrow row is set to 13 cm, the wide row is set to 63 cm, the drip irrigation tape is set in two wide rows, one of the wide rows is laid with 2 drip irrigation tapes, and the other wide row is laid with 1 drip irrigation tape, and a total of 3 drip irrigation tapes are laid. 20 days before planting cotton, turn on the drip irrigation belt and use it to drip water to the planting area. The dripping amount is 25 cubic meters per mu, and dripping is performed every 6 days, for a total of 3 times. After the dripping is completed, holes are punched through the mulch film and Xinluzhong 23 cotton seeds are sown according to the above row spacing. The plant spacing is set to 13 cm, the sowing amount is 2.0 kg per mu, 1 seed is sown per hole, and the number of plants per mu is set to 14,000 plants per mu. No treatment is performed in the salt drainage area.

[0063] After the last irrigation and before sowing cotton, soil from 0 to 30 cm was taken from the planting area and the salt drainage area to test the salt content in the soil in different areas. The test results are shown in Table 5.

[0064] Table 5 Salt content in soils of different regions

[0065] project Salt content / g / kg Planting area 5.1 Salt discharge area 22.5

[0066] Table 5 shows that the salt content in the planting area is significantly lower than that in the salt-draining area, and is also lower than the salt content in the soil before treatment, which indicates that after using the method of the present invention, the salt content in the planting area flows into the salt-draining area.

[0067] During the planting process, the emergence rate of cotton was observed and calculated according to the method of Example 1. At the time of harvest, the yield of seed cotton was counted, and the results are shown in Table 6.

[0068] Table 6 Effect of the method of Example 3 on cotton yield

[0069] Group Seedling rate% Seed cotton yield / kg / mu Example 3 85.6 461.2

[0070] Table 4 shows that the method of Example 3 can make the emergence rate of Xinluzhong 23 cotton reach 85.6%, and the seed cotton yield is as high as 461.2 kg / mu, which is suitable for cotton planting in Xinjiang.

[0071] It can be seen from the above embodiments that the present invention provides a method and application suitable for planting cotton in moderately saline-alkali land in Xinjiang. The present invention provides a method suitable for planting cotton in moderately saline-alkali land in Xinjiang, comprising the following steps: (1) Dividing moderately saline-alkali land in Xinjiang into adjacent planting areas and salt drainage areas; the width of each planting area is 50 to 193 cm, and the width of each salt drainage area is 40 to 65 cm; (2) Laying a drip irrigation belt on the planting area and covering it with a ground film; Before planting cotton, the planting area is drip-irrigated with a drip irrigation belt 2 to 4 times, and the amount of water dripped each time is 15 to 32 cubic meters per mu; the time interval between two adjacent drips is 5 to 10 days; (3) 5 to 10 days after the last drip, drilling holes through the ground film and sowing cotton seeds in the holes. The method of the present invention drips water through a drip irrigation belt, and the water drives the movement of salt in the soil covered with the mulch film. After each drip irrigation belt supplies water, the moisture in the soil of the mulch film planting area increases, and the moisture flows to the salt discharge area in the area not covered with the mulch film. The moisture in the salt discharge area evaporates, and the salt remains. The planting area covered with the mulch film is blocked by the mulch film, so that the moisture flows to the salt discharge area not covered with the mulch film. The salt comes to the salt discharge area not covered with the mulch film with the water, and the moisture evaporates. The salt remains in the salt discharge area not covered with the salt, forming salt enrichment, and the cycle is repeated once or multiple times. With the evaporation of the moisture in the salt discharge area, the salt in the planting area is gradually brought to the salt discharge area by water. The improved method of the present invention does not require ridge formation, and adopts the method of directly laying the drip irrigation belt and the mulch film on flat ground, which is convenient for machine operation and greatly improves the efficiency of mechanical film laying and drip irrigation belt laying. The method can greatly reduce the salt content in the medium and high salt areas of Xinjiang, making it more suitable for crop growth. Using this method to plant cotton in moderately and highly saline-alkali lands in Xinjiang can significantly improve the cotton emergence rate and increase the yield, providing a new idea for planting cotton in moderately and highly saline-alkali lands in Xinjiang.

[0072] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method suitable for planting cotton in moderate to high saline-alkali land in Xinjiang, characterized in that: The steps include: (1) Divide the moderately saline-alkali land in Xinjiang into adjacent planting areas and salt drainage areas; the width of each planting area is 50 to 193 cm, and the width of each salt drainage area is 40 to 65 cm; (2) Drip irrigation tape is laid on the planting area and covered with mulch film; before planting cotton, the drip irrigation tape is used to drip water on the planting area 2 to 4 times, with each dripping amount of 15 to 32 cubic meters per mu; the time interval between two adjacent drippings is 5 to 10 days; (3) 5 to 10 days after the last dripping, holes are punched through the mulch film and cotton seeds are sown in the holes.

2. The method according to claim 1, characterized in that The row spacing of cotton planted in step (3) is 8 to 66 cm, and 2 to 6 rows are planted in each planting area.

3. The method according to claim 2, characterized in that The cotton plant spacing in step (3) is 8 to 15 cm.

4. The method according to claim 3, characterized in that: The sowing rate of cotton seeds in step (3) is 1.4-3.6 kg / mu.

5. The method according to claim 4, characterized in that Sow 1 to 2 cotton seeds in each hole.

6. The method according to claim 5, characterized in that The number of cotton seeds sown per mu is 11,000 to 20,000 plants per mu.

7. The cotton grown by the method according to any one of claims 1 to 6, characterized in that: The cotton seedling emergence rate is ≥72%.

8. Use of the method according to any one of claims 1 to 6 in improving the emergence rate of cotton in moderate to severe saline-alkali lands in Xinjiang.

9. Use of the method according to any one of claims 1 to 6 in increasing the yield of cotton in moderately and highly saline-alkali lands in Xinjiang.