A method for turning over green manure to repair soil compaction during sugarcane harvesting
Through the repellent green manure repair method, the soil compaction problem caused by sugarcane machine harvesting is solved, the soil structure and microbial environment are improved, the growth capacity and soil breathability of the sugarcane root system are improved, and soil erosion is reduced.
Patent Information
- Application Number
- CN202310044805.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-01-30
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2043-01-30
AI Technical Summary
The sugarcane harvesting leads to soil compaction problems, affecting the growth of root cane, increasing the risk of soil erosion, and lacking effective methods for improvement.
The remediation method of turning green manure is adopted, including deep mechanical tillage, compacting soil improvement agents by the applicator, intercropping sweet potatoes, and turning sweet potato vines and roots into green manure, combining with the mixed solution of worm solution to assist in the decomposition, improving the soil structure and microbial environment.
Effectively reduce soil density, increase soil voids and organic matter content, improve the root growth environment, reduce the difficulty of soil compaction on the root system, improve the root system strength of sugarcane, enhance soil breathability and insulation effect, and prevent frost damage.
Smart Images
Figure CN116034841B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of agricultural planting, and in particular to a method for turning over green manure to repair soil compacted by sugarcane harvesting machine. Background Art
[0002] Sugarcane, also known as potato cane, pole cane, sugar stalk, dry cane, sedge cane, bamboo cane, and intestine grass, belongs to the Poaceae family, Saccharum tribe, and is a tropical and subtropical tall monocot annual or perennial herb. The stems of sugarcane are solid and grow regularly like bamboo, with nodes, and each node has a bud. Sugarcane grows in dense clusters, with beautiful sword-like leaves, similar to corn leaves. The leaf sheaths wrap around the stems to protect the buds. The stems of sugarcane are rich in juice and sweet in taste. They are the raw material for making sucrose, and can be refined into ethanol as an energy substitute.
[0003] The average per mu yield of sugarcane is more than 10 tons, and the lowest is about 3 tons. The average per mu yield of sugarcane in Guangxi is about 4-6 tons. With such a high yield, manual harvesting of sugarcane will result in excessively high labor costs. Therefore, sugarcane can be harvested mechanically. Mechanical harvesting of sugarcane has improved the modernization of agricultural production, reduced the labor burden for agricultural production and improved production efficiency. However, the sugarcane itself is heavy, and the weight of the harvesting machinery itself means that when the machinery is harvesting sugarcane, it will be overloaded, causing obvious compaction problems on the cultivated land soil, which is not conducive to the growth of perennial sugarcane and is more likely to cause problems such as soil erosion. At present, there is no effective method to improve the compaction of soil by sugarcane harvesting. Summary of the invention
[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a method for repairing soil compacted by sugarcane harvesting by turning over green manure, which has a good improvement effect.
[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows: a method for turning over green manure to repair soil compaction during sugarcane harvesting, comprising the following steps:
[0006] (1) Pretreatment of planting land: select a plot with loose and fertile soil as the sugarcane planting land; prepare the land, mechanically plough it to a depth of 30 to 35 cm, level it, apply base fertilizer, and then apply 300 to 350 kg / mu of mechanically compacted soil conditioner to obtain a pretreated planting land; the mechanically compacted soil conditioner is applied at a depth of 25 to 30 cm; the mechanically compacted soil conditioner is composed of the following raw materials in parts by weight: 100 to 120 parts of coconut bran, 50 to 60 parts of eggshell powder, 50 to 60 parts of first modified eggshell powder, and 50 to 60 parts of second modified eggshell powder;
[0007] The first modified eggshell powder is a high temperature modified eggshell powder; the second modified eggshell powder is a hydrogen peroxide modified eggshell powder;
[0008] (2) Sugarcane planting:
[0009] 2.1) Planting sugarcane: From early February to early March, sow sugarcane seed stems on the planting land pre-treated in step (1) according to the combination of 135cm + 55cm wide and narrow row spacing, cover with soil, and cover with film to complete film-covered cultivation;
[0010] 2.3) Sugarcane field management: timely fertilization and weeding; timely spraying of pesticides according to the occurrence of sugarcane pests;
[0011] 2.4) Harvesting sugarcane: When sugarcane is ripe, harvest it in sunny weather;
[0012] (3) Sweet potato planting and management:
[0013] 3.1) Sweet potato planting: From late June to early July, sweet potatoes are planted between the sugarcane rows;
[0014] 3.2) Sweet potato field management: During the sweet potato tuber expansion period, spread the mechanically harvested and compacted soil conditioner with a thickness of 3.5-4 cm in the sweet potato planting area;
[0015] 3.3) Turning over green manure: Before harvesting sugarcane, harvest the sweet potato vines and dig out the sweet potato tubers at the same time; after mechanically harvesting the sugarcane, turn over the sweet potato vines and sweet potato tubers together under the soil between the sugarcane rows to decompose.
[0016] Furthermore, the mechanically harvested and compacted soil conditioner in step (1) is composed of the following raw materials in parts by weight: 110-120 parts of coconut bran, 55-60 parts of eggshell powder, 55-60 parts of first modified eggshell powder, and 55-60 parts of second modified eggshell powder.
[0017] Furthermore, the preparation method of the first modified eggshell powder in step (1) is: crushing the eggshell powder to 150-200 mesh, and high-temperature treating it in a muffle furnace at 430-450° C. for 1.5-1.8 hours to obtain the first modified eggshell powder.
[0018] Furthermore, the preparation method of the second modified eggshell powder in step (1) is: placing the eggshell powder in hydrogen peroxide with a mass fraction of 23-25%, stirring for 25-30 minutes, and then letting it stand for 2.5-2.8 hours to obtain the second modified eggshell powder.
[0019] Furthermore, in step (1), 400-450 kg / mu of sheep manure is applied as base fertilizer.
[0020] Furthermore, in the step 2.1), from early February to early March, sugarcane seed stems are sown on the planting land pre-treated in step (1) according to a combination of 135 cm + 55 cm wide and narrow row spacing, with a sowing amount of 6500 to 7000 buds per mu, and the land is covered with soil and film to complete film cultivation.
[0021] Furthermore, before planting sugarcane in the step 2.1), the sugarcane seed stems are first treated with hot water at 54° C. for 8 hours, and then the sugarcane seed stems are soaked in a mixture of lime and sodium bicarbonate for 6 to 8 hours to prevent the perennial sugarcane from being dwarfed due to soil compaction caused by mechanical harvesting of sugarcane; the mass fraction of lime in the mixture of lime and sodium bicarbonate is 1.6 to 1.8%, and the mass fraction of sodium bicarbonate is 2 to 3%.
[0022] Furthermore, before planting sugarcane in step 2.1), the sugarcane seed stems are first treated with hot water at 54° C. for 8 hours, and then the sugarcane seed stems are soaked in a mixture of lime and sodium bicarbonate for 7 to 8 hours to prevent the perennial sugarcane from being dwarfed due to soil compaction caused by mechanical harvesting of sugarcane; the mass fraction of lime in the mixture of lime and sodium bicarbonate is 1.7 to 1.8%, and the mass fraction of sodium bicarbonate is 2.5 to 3%.
[0023] Furthermore, in the step 3.3), the sweet potato vines and sweet potato tubers are turned over together under the soil between the sugarcane rows, and then a biogas slurry mixture is sprayed on the soil to assist the green manure in decomposing. The biogas slurry mixture is composed of the following raw materials in parts by weight: 100-120 parts of biogas slurry and 6-8 parts of urea.
[0024] Furthermore, the biogas slurry mixture also includes 0.2 to 0.3 parts by weight of borax.
[0025] The beneficial effects of the present invention are as follows: the present invention provides a method for repairing soil compacted by mechanized harvesting of sugarcane by turning over green manure. For the soil compacted by mechanized harvesting of sugarcane, the method combines mechanical deep ploughing, application of mechanized harvesting and compacting soil conditioner, intercropping of sweet potatoes, application of mechanized harvesting and compacting soil conditioner, and turning over sweet potato vines and sweet potato tubers as green manure, which can effectively reduce the density of compacted soil, increase the gaps between soils, help precipitation to quickly penetrate into the soil, and reduce the occurrence of surface runoff. It can also increase the number of beneficial microorganisms in the soil, increase the content of soil organic matter, and change the environment around the roots, thereby reducing soil hardness, alleviating the difficulty of root system rooting caused by soil compaction, and facilitating the growth of sugarcane rhizomes and improving the root strength of sugarcane, thereby effectively improving the soil compacted by mechanized harvesting of sugarcane.
[0026] The present invention discloses a method for repairing the mechanically compacted soil of sugarcane by turning over green manure. The main component of eggshell powder is calcium carbonate, which is also rich in trace elements such as calcium, magnesium, potassium, iron and phosphorus. After the eggshell powder is added to the mechanically compacted soil of sugarcane, the physical properties of the soil can be improved, the soil is looser, and the soil is both breathable and drainable, which is beneficial to the growth of the root system of perennial sugarcane. The phosphorus in the eggshell powder is an important element constituting the plant cell nucleus, and calcium is a component of the gelatin layer in the plant cell wall. The phosphorus and calcium in the eggshell powder can promote the division of sugarcane root cells and the development of the root system, which is beneficial to the growth of the root system of perennial sugarcane. The eggshell powder is subjected to high temperature modification, double Oxygen-water modification and high-temperature modification can increase the specific surface area of eggshell powder by about one-fold, further improving soil looseness. Hydrogen peroxide modification can further slow-release phosphorus and calcium in eggshell powder, which is more beneficial to the growth of sugarcane roots. Unmodified eggshell powder provides a better growth environment for beneficial microorganisms in the soil, further changing the environment around the sugarcane roots. Coconut bran, eggshell powder, the first modified eggshell powder, and the second modified eggshell powder are mixed in proportion to form a mechanically harvested and compacted soil conditioner, which can promote the growth of sugarcane roots, increase soil looseness, and increase the number of beneficial microorganisms to the greatest extent, thereby effectively improving the mechanically compacted soil of sugarcane. From late June to early July, sweet potatoes are planted between the sugarcane rows. During the sweet potato tuber swelling period, mechanically compacted soil conditioner is sprinkled on the sweet potato planting area. On the one hand, mechanically compacted soil conditioner can increase the looseness and air permeability of the soil. On the other hand, mechanically compacted soil conditioner plays a role in heat preservation, preventing frost and freezing damage caused by cold weather. Unfrozen sweet potatoes can provide richer organic matter. The sweet potato vines and sweet potato tubers are turned over and pressed together in the soil between the sugarcane rows to mature, which can further enrich the number of beneficial bacteria in the sugarcane root system, thereby improving the soil structure, increasing the soil organic matter content, and improving the root strength of the sugarcane, thereby effectively improving the mechanically compacted soil of the sugarcane.
[0027] The invention discloses a method for repairing soil compacted by sugarcane mechanized harvest by turning over green manure. Before planting sugarcane, the sugarcane seed stems are treated with hot water at 54°C for 8 hours, and then the sugarcane seed stems are soaked in a mixture of lime and sodium bicarbonate for 6-8 hours, so as to effectively prevent the dwarfing of perennial sugarcane caused by soil compaction by sugarcane mechanized harvest; the sweet potato vines and sweet potato tubers are turned over together under the soil between sugarcane rows, and then the biogas slurry mixture is sprayed on the soil to assist the green manure in decomposing, so that the green manure has better decomposing effect, can effectively increase the organic matter content of the soil, change the surrounding environment of the root system, thereby reducing the hardness of the soil, reducing the difficulty of the root system in taking root caused by soil compaction, facilitating the growth of sugarcane rhizomes, and improving the root system strength of sugarcane, so as to effectively improve the soil compaction by sugarcane mechanized harvest; the biogas slurry mixture also includes borax, which can prolong the boron supply time of the soil, and the borax can participate in the metabolism of sugarcane growth hormones, promote the absorption of nutrients such as calcium by sugarcane, and promote the stable and increased yield of sugarcane. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1The figure is a schematic diagram of the planar layout of the present invention; the numbers in the figure are: 1 is sugarcane, and 2 is sweet potato. DETAILED DESCRIPTION
[0029] The following embodiments may help those skilled in the art to more fully understand the present invention, but shall not limit the present invention in any way.
[0030] Example 1
[0031] A method for turning over green manure to repair soil compaction after sugarcane harvesting, planting location: Wuming District, Nanning City, Guangxi, comprising the following steps:
[0032] (1) Pretreatment of planting land: select a plot with loose and fertile soil as a sugarcane planting land; prepare the land, mechanically plough the land to a depth of 30 cm, level it, apply 400 kg / mu of sheep manure as base fertilizer, and then apply 300 kg / mu of mechanically compacted soil conditioner to obtain a pretreated planting land; the mechanically compacted soil conditioner is applied at a depth of 25 cm, and the base fertilizer is directly applied on top of the mechanically compacted soil conditioner; the mechanically compacted soil conditioner is composed of the following raw materials in parts by weight: 100 parts of coconut bran, 50 parts of eggshell powder, 50 parts of first modified eggshell powder, and 50 parts of second modified eggshell powder;
[0033] The first modified eggshell powder is a high-temperature modified eggshell powder; the second modified eggshell powder is a hydrogen peroxide modified eggshell powder; the first modified eggshell powder is prepared by crushing the eggshell powder into 150 meshes, and high-temperature treating it in a muffle furnace at 430° C. for 1.5 hours to obtain the first modified eggshell powder; the second modified eggshell powder is prepared by placing the eggshell powder in 23% hydrogen peroxide by mass, stirring it for 25 minutes, and then standing it for 2.5 hours to obtain the second modified eggshell powder;
[0034] (2) Sugarcane planting:
[0035] 2.1) Planting sugarcane: The sugarcane variety is Guiliu 05136. Before planting sugarcane, treat the sugarcane seed stems with 54°C hot water for 8 hours, and then soak the sugarcane seed stems in a mixture of lime and sodium bicarbonate for 6 hours to prevent the perennial sugarcane from being dwarfed due to soil compaction caused by mechanical harvesting of sugarcane. The mass fraction of lime in the mixture of lime and sodium bicarbonate is 1.6%, and the mass fraction of sodium bicarbonate is 2%. From early February to early March, sow the sugarcane seed stems on the planting land pre-treated in step (1) according to a combination of 135 cm + 55 cm wide and narrow row spacing, with a sowing amount of 6,500 buds / mu, cover with soil, and cover with mulch film to complete mulch cultivation.
[0036] 2.3) Sugarcane field management: timely fertilization and weeding; timely spraying of pesticides according to the occurrence of sugarcane pests;
[0037] 2.4) Harvesting sugarcane: When sugarcane is ripe, harvest it in sunny weather;
[0038] (3) Sweet potato planting and management:
[0039] 3.1) Sweet potato planting: From late June to early July, sweet potatoes are planted between the sugarcane rows;
[0040] 3.2) Sweet potato field management: During the sweet potato tuber expansion period, spread the mechanically harvested and compacted soil conditioner with a thickness of 3.5 cm in the sweet potato planting area;
[0041] 3.3) Turning over green manure: before harvesting sugarcane, the sweet potato vines are harvested and the sweet potato tubers are dug out at the same time; after mechanically harvesting the sugarcane, the sweet potato tubers are first cut into multiple sections, and then the sweet potato vines and sweet potato tubers are turned over together under the soil between the sugarcane rows, and then the biogas slurry mixture is sprayed on the soil to assist the green manure in decomposition. The biogas slurry mixture is composed of the following raw materials in parts by weight: 100 parts of biogas slurry, 6 parts of urea, and 0.2 parts of borax.
[0042] Example 2
[0043] A method for turning over green manure to repair soil compaction after sugarcane harvesting, planting location: Wuming District, Nanning City, Guangxi, comprising the following steps:
[0044] (1) Pretreatment of planting land: select a plot with loose and fertile soil as a sugarcane planting land; prepare the land, mechanically plough it to a depth of 35 cm, level it, apply 450 kg / mu of sheep manure as base fertilizer, and then apply 350 kg / mu of mechanically compacted soil conditioner to obtain a pretreated planting land; the mechanically compacted soil conditioner is applied at a depth of 30 cm, and the base fertilizer is directly applied on top of the mechanically compacted soil conditioner; the mechanically compacted soil conditioner is composed of the following raw materials in parts by weight: 120 parts of coconut bran, 60 parts of eggshell powder, 60 parts of first modified eggshell powder, and 60 parts of second modified eggshell powder;
[0045] The first modified eggshell powder is a high-temperature modified eggshell powder; the second modified eggshell powder is a hydrogen peroxide modified eggshell powder; the first modified eggshell powder is prepared by crushing the eggshell powder to 200 meshes, and high-temperature treating it in a muffle furnace at 450° C. for 1.8 hours to obtain the first modified eggshell powder; the second modified eggshell powder is prepared by placing the eggshell powder in 25% hydrogen peroxide by mass, stirring it for 30 minutes, and then standing it for 2.8 hours to obtain the second modified eggshell powder;
[0046] (2) Sugarcane planting:
[0047] 2.1) Planting sugarcane: The sugarcane variety is Guiliu 05136; before planting sugarcane, treat the sugarcane seed stems with 54°C hot water for 8 hours, and then soak the sugarcane seed stems in a mixture of lime and sodium bicarbonate for 8 hours to prevent the perennial sugarcane from being dwarfed due to soil compaction caused by mechanical harvesting of sugarcane; the mass fraction of lime in the mixture of lime and sodium bicarbonate is 1.8%, and the mass fraction of sodium bicarbonate is 3%; from early February to early March, sow the sugarcane seed stems on the planting land pre-treated in step (1) according to a combination of 135 cm + 55 cm wide and narrow row spacing, with a sowing amount of 7,000 buds / mu, cover with soil, cover with mulch film, and complete mulch cultivation;
[0048] 2.3) Sugarcane field management: timely fertilization and weeding; timely spraying of pesticides according to the occurrence of sugarcane pests;
[0049] 2.4) Harvesting sugarcane: When sugarcane is ripe, harvest it in sunny weather;
[0050] (3) Sweet potato planting and management:
[0051] 3.1) Sweet potato planting: From late June to early July, sweet potatoes are planted between the sugarcane rows;
[0052] 3.2) Sweet potato field management: During the sweet potato tuber expansion period, spread the mechanically harvested and compacted soil conditioner with a thickness of 4 cm in the sweet potato planting area;
[0053] 3.3) Turning over green manure: before harvesting sugarcane, the sweet potato vines are harvested and the sweet potato tubers are dug out at the same time; after mechanically harvesting the sugarcane, the sweet potato tubers are first cut into multiple sections, and then the sweet potato vines and sweet potato tubers are turned over together under the soil between the sugarcane rows, and then the biogas slurry mixture is sprayed on the soil to assist the green manure in decomposition. The biogas slurry mixture is composed of the following raw materials in parts by weight: 120 parts of biogas slurry, 8 parts of urea, and 0.3 parts of borax.
[0054] Example 3
[0055] A method for turning over green manure to repair soil compaction after sugarcane harvesting, planting location: Wuming District, Nanning City, Guangxi, comprising the following steps:
[0056] (1) Pretreatment of planting land: select a plot with loose and fertile soil as a sugarcane planting land; prepare the land, mechanically plow it to a depth of 32 cm, level it, apply 430 kg / mu of sheep manure as base fertilizer, and then apply 330 kg / mu of mechanically compacted soil conditioner to obtain a pretreated planting land; the mechanically compacted soil conditioner is applied at a depth of 27 cm, and the base fertilizer is directly applied on top of the mechanically compacted soil conditioner; the mechanically compacted soil conditioner is composed of the following raw materials in parts by weight: 110 parts of coconut bran, 55 parts of eggshell powder, 55 parts of first modified eggshell powder, and 55 parts of second modified eggshell powder;
[0057] The first modified eggshell powder is a high-temperature modified eggshell powder; the second modified eggshell powder is a hydrogen peroxide modified eggshell powder; the first modified eggshell powder is prepared by crushing the eggshell powder into 180 meshes, and high-temperature treating the eggshell powder in a muffle furnace at 440° C. for 1.6 hours to obtain the first modified eggshell powder; the second modified eggshell powder is prepared by placing the eggshell powder in 24% hydrogen peroxide, stirring for 28 minutes, and then standing for 2.6 hours to obtain the second modified eggshell powder;
[0058] (2) Sugarcane planting:
[0059] 2.1) Planting sugarcane: The sugarcane variety is Guiliu 05136. Before planting sugarcane, treat the sugarcane seed stems with 54°C hot water for 8 hours, and then soak the sugarcane seed stems in a mixture of lime and sodium bicarbonate for 7 hours to prevent the perennial sugarcane from being dwarfed due to soil compaction caused by mechanical harvesting of sugarcane. The mass fraction of lime in the mixture of lime and sodium bicarbonate is 1.7%, and the mass fraction of sodium bicarbonate is 2.5%. From early February to early March, sow the sugarcane seed stems on the planting land pre-treated in step (1) according to a combination of 135 cm + 55 cm wide and narrow row spacing, with a sowing amount of 6,800 buds / mu, cover with soil, and cover with mulch film to complete mulch cultivation.
[0060] 2.3) Sugarcane field management: timely fertilization and weeding; timely spraying of pesticides according to the occurrence of sugarcane pests;
[0061] 2.4) Harvesting sugarcane: When sugarcane is ripe, harvest it in sunny weather;
[0062] (3) Sweet potato planting and management:
[0063] 3.1) Sweet potato planting: From late June to early July, sweet potatoes are planted between the sugarcane rows;
[0064] 3.2) Sweet potato field management: During the sweet potato tuber expansion period, spread the mechanically harvested and compacted soil conditioner with a thickness of 3.8 cm in the sweet potato planting area;
[0065] 3.3) Turning over green manure: before harvesting sugarcane, the sweet potato vines are harvested and the sweet potato tubers are dug out at the same time; after mechanically harvesting the sugarcane, the sweet potato tubers are first cut into multiple sections, and then the sweet potato vines and sweet potato tubers are turned over together under the soil between the sugarcane rows, and then the biogas slurry mixture is sprayed on the soil to assist the green manure in decomposition. The biogas slurry mixture is composed of the following raw materials in parts by weight: 110 parts of biogas slurry, 7 parts of urea, and 0.25 parts of borax.
[0066] Example 4
[0067] A method for turning over green manure to repair soil compaction after sugarcane harvesting, planting location: Wuming District, Nanning City, Guangxi, comprising the following steps:
[0068] (1) Pretreatment of planting land: select a plot with loose and fertile soil as a sugarcane planting land; prepare the land, mechanically plow it to a depth of 32 cm, level it, apply 430 kg / mu of sheep manure as base fertilizer, and then apply 330 kg / mu of mechanically compacted soil conditioner to obtain a pretreated planting land; the mechanically compacted soil conditioner is applied at a depth of 27 cm, and the base fertilizer is directly applied on top of the mechanically compacted soil conditioner; the mechanically compacted soil conditioner is composed of the following raw materials in parts by weight: 110 parts of coconut bran, 55 parts of eggshell powder, 55 parts of first modified eggshell powder, and 55 parts of second modified eggshell powder;
[0069] The first modified eggshell powder is a high-temperature modified eggshell powder; the second modified eggshell powder is a hydrogen peroxide modified eggshell powder; the first modified eggshell powder is prepared by crushing the eggshell powder into 180 meshes, and high-temperature treating the eggshell powder in a muffle furnace at 440° C. for 1.6 hours to obtain the first modified eggshell powder; the second modified eggshell powder is prepared by placing the eggshell powder in 24% hydrogen peroxide, stirring for 28 minutes, and then standing for 2.6 hours to obtain the second modified eggshell powder;
[0070] (2) Sugarcane planting:
[0071] 2.1) Planting sugarcane: The sugarcane variety is Guiliu 05136; from early February to early March, sow sugarcane seed stems on the planting land pre-treated in step (1) in a row spacing combination of 135 cm + 55 cm, with a sowing amount of 6,800 buds / mu, cover with soil, cover with film, and complete film cultivation;
[0072] 2.3) Sugarcane field management: timely fertilization and weeding; timely spraying of pesticides according to the occurrence of sugarcane pests;
[0073] 2.4) Harvesting sugarcane: When sugarcane is ripe, harvest it in sunny weather;
[0074] (3) Sweet potato planting and management:
[0075] 3.1) Sweet potato planting: From late June to early July, sweet potatoes are planted between the sugarcane rows;
[0076] 3.2) Sweet potato field management: During the sweet potato tuber expansion period, spread the mechanically harvested and compacted soil conditioner with a thickness of 3.8 cm in the sweet potato planting area;
[0077] 3.3) Turning over green manure: before harvesting sugarcane, the sweet potato vines are harvested and the sweet potato tubers are dug out at the same time; after mechanically harvesting the sugarcane, the sweet potato tubers are first cut into multiple sections, and then the sweet potato vines and sweet potato tubers are turned over together under the soil between the sugarcane rows, and then the biogas slurry mixture is sprayed on the soil to assist the green manure in decomposition. The biogas slurry mixture is composed of the following raw materials in parts by weight: 110 parts of biogas slurry, 7 parts of urea, and 0.25 parts of borax.
[0078] Example 5
[0079] A method for turning over green manure to repair soil compaction after sugarcane harvesting, planting location: Wuming District, Nanning City, Guangxi, comprising the following steps:
[0080] (1) Pretreatment of planting land: select a plot with loose and fertile soil as a sugarcane planting land; prepare the land, mechanically plow it to a depth of 32 cm, level it, apply 430 kg / mu of sheep manure as base fertilizer, and then apply 330 kg / mu of mechanically compacted soil conditioner to obtain a pretreated planting land; the mechanically compacted soil conditioner is applied at a depth of 27 cm, and the base fertilizer is directly applied on top of the mechanically compacted soil conditioner; the mechanically compacted soil conditioner is composed of the following raw materials in parts by weight: 110 parts of coconut bran, 55 parts of eggshell powder, 55 parts of first modified eggshell powder, and 55 parts of second modified eggshell powder;
[0081] The first modified eggshell powder is a high-temperature modified eggshell powder; the second modified eggshell powder is a hydrogen peroxide modified eggshell powder; the first modified eggshell powder is prepared by crushing the eggshell powder into 180 meshes, and high-temperature treating the eggshell powder in a muffle furnace at 440° C. for 1.6 hours to obtain the first modified eggshell powder; the second modified eggshell powder is prepared by placing the eggshell powder in 24% hydrogen peroxide, stirring for 28 minutes, and then standing for 2.6 hours to obtain the second modified eggshell powder;
[0082] (2) Sugarcane planting:
[0083] 2.1) Planting sugarcane: The sugarcane variety is Guiliu 05136. Before planting sugarcane, treat the sugarcane seed stems with 54°C hot water for 8 hours, and then soak the sugarcane seed stems in a mixture of lime and sodium bicarbonate for 7 hours to prevent the perennial sugarcane from being dwarfed due to soil compaction caused by mechanical harvesting of sugarcane. The mass fraction of lime in the mixture of lime and sodium bicarbonate is 1.7%, and the mass fraction of sodium bicarbonate is 2.5%. From early February to early March, sow the sugarcane seed stems on the planting land pre-treated in step (1) according to a combination of 135 cm + 55 cm wide and narrow row spacing, with a sowing amount of 6,800 buds / mu, cover with soil, and cover with mulch film to complete mulch cultivation.
[0084] 2.3) Sugarcane field management: timely fertilization and weeding; timely spraying of pesticides according to the occurrence of sugarcane pests;
[0085] 2.4) Harvesting sugarcane: When sugarcane is ripe, harvest it in sunny weather;
[0086] (3) Sweet potato planting and management:
[0087] 3.1) Sweet potato planting: From late June to early July, sweet potatoes are planted between the sugarcane rows;
[0088] 3.2) Sweet potato field management: During the sweet potato tuber expansion period, spread the mechanically harvested and compacted soil conditioner with a thickness of 3.8 cm in the sweet potato planting area;
[0089] 3.3) Turning over green manure: Before harvesting sugarcane, harvest the sweet potato vines and dig out the sweet potato tubers at the same time; after mechanically harvesting the sugarcane, cut the sweet potato tubers into multiple sections, and then turn over the sweet potato vines and sweet potato tubers together under the soil between the sugarcane rows to decompose.
[0090] Comparative Example 1
[0091] A method for turning over green manure to repair soil compaction after sugarcane harvesting, planting location: Wuming District, Nanning City, Guangxi, comprising the following steps:
[0092] (1) Pretreatment of planting site: select a plot with loose and fertile soil as the sugarcane planting site; prepare the land, mechanically plough 32 cm deep, level it, apply 430 kg / mu of sheep manure as base fertilizer, and then apply 330 kg / mu of mechanically compacted soil conditioner to obtain a pretreated planting site; the mechanically compacted soil conditioner is applied at a depth of 27 cm, and the base fertilizer is directly applied on top of the mechanically compacted soil conditioner; the mechanically compacted soil conditioner is composed of the following raw materials in parts by weight: 110 parts of coconut bran and 165 parts of eggshell powder;
[0093] (2) Sugarcane planting:
[0094] 2.1) Planting sugarcane: The sugarcane variety is Guiliu 05136. Before planting sugarcane, treat the sugarcane seed stems with 54°C hot water for 8 hours, and then soak the sugarcane seed stems in a mixture of lime and sodium bicarbonate for 7 hours to prevent the perennial sugarcane from being dwarfed due to soil compaction caused by mechanical harvesting of sugarcane. The mass fraction of lime in the mixture of lime and sodium bicarbonate is 1.7%, and the mass fraction of sodium bicarbonate is 2.5%. From early February to early March, sow the sugarcane seed stems on the planting land pre-treated in step (1) according to a combination of 135 cm + 55 cm wide and narrow row spacing, with a sowing amount of 6,800 buds / mu, cover with soil, and cover with mulch film to complete mulch cultivation.
[0095] 2.3) Sugarcane field management: timely fertilization and weeding; timely spraying of pesticides according to the occurrence of sugarcane pests;
[0096] 2.4) Harvesting sugarcane: When sugarcane is ripe, harvest it in sunny weather;
[0097] (3) Sweet potato planting and management:
[0098] 3.1) Sweet potato planting: From late June to early July, sweet potatoes are planted between the sugarcane rows;
[0099] 3.2) Sweet potato field management: During the sweet potato tuber expansion period, spread the mechanically harvested and compacted soil conditioner with a thickness of 3.8 cm in the sweet potato planting area;
[0100] 3.3) Turning over green manure: before harvesting sugarcane, the sweet potato vines are harvested and the sweet potato tubers are dug out at the same time; after mechanically harvesting the sugarcane, the sweet potato tubers are first cut into multiple sections, and then the sweet potato vines and sweet potato tubers are turned over together under the soil between the sugarcane rows, and then the biogas slurry mixture is sprayed on the soil to assist the green manure in decomposition. The biogas slurry mixture is composed of the following raw materials in parts by weight: 110 parts of biogas slurry, 7 parts of urea, and 0.25 parts of borax.
[0101] Comparative Example 2
[0102] A method for turning over green manure to repair soil compaction after sugarcane harvesting, planting location: Wuming District, Nanning City, Guangxi, comprising the following steps:
[0103] (1) Pretreatment of planting land: select a plot with loose and fertile soil as a sugarcane planting land; prepare the land, mechanically plow it to a depth of 32 cm, level it, apply 430 kg / mu of sheep manure as base fertilizer, and then apply 330 kg / mu of mechanically compacted soil conditioner to obtain a pretreated planting land; the mechanically compacted soil conditioner is applied at a depth of 27 cm, and the base fertilizer is directly applied on top of the mechanically compacted soil conditioner; the mechanically compacted soil conditioner is composed of the following raw materials in parts by weight: 110 parts of coconut bran, 55 parts of eggshell powder, 55 parts of first modified eggshell powder, and 55 parts of second modified eggshell powder;
[0104] The first modified eggshell powder is a high-temperature modified eggshell powder; the second modified eggshell powder is a hydrogen peroxide modified eggshell powder; the first modified eggshell powder is prepared by crushing the eggshell powder into 180 meshes, and high-temperature treating the eggshell powder in a muffle furnace at 440° C. for 1.6 hours to obtain the first modified eggshell powder; the second modified eggshell powder is prepared by placing the eggshell powder in 24% hydrogen peroxide, stirring for 28 minutes, and then standing for 2.6 hours to obtain the second modified eggshell powder;
[0105] (2) Sugarcane planting:
[0106] 2.1) Planting sugarcane: The sugarcane variety is Guiliu 05136. Before planting sugarcane, treat the sugarcane seed stems with 54°C hot water for 8 hours, and then soak the sugarcane seed stems in a mixture of lime and sodium bicarbonate for 7 hours to prevent the perennial sugarcane from being dwarfed due to soil compaction caused by mechanical harvesting of sugarcane. The mass fraction of lime in the mixture of lime and sodium bicarbonate is 1.7%, and the mass fraction of sodium bicarbonate is 2.5%. From early February to early March, sow the sugarcane seed stems on the planting land pre-treated in step (1) according to a combination of 135 cm + 55 cm wide and narrow row spacing, with a sowing amount of 6,800 buds / mu, cover with soil, and cover with mulch film to complete mulch cultivation.
[0107] 2.3) Sugarcane field management: timely fertilization and weeding; timely spraying of pesticides according to the occurrence of sugarcane pests;
[0108] 2.4) Harvesting sugarcane: When sugarcane is ripe, it is harvested in clear weather.
[0109] Comparative Example 3
[0110] A method for turning over green manure to repair soil compaction after sugarcane harvesting, planting location: Wuming District, Nanning City, Guangxi, comprising the following steps:
[0111] (1) Pretreatment of planting land: select a plot with loose and fertile soil as a sugarcane planting land; prepare the land, mechanically plow it to a depth of 32 cm, level it, apply 430 kg / mu of sheep manure as base fertilizer, and then apply 330 kg / mu of mechanically compacted soil conditioner to obtain a pretreated planting land; the mechanically compacted soil conditioner is applied at a depth of 27 cm, and the base fertilizer is directly applied on top of the mechanically compacted soil conditioner; the mechanically compacted soil conditioner is composed of the following raw materials in parts by weight: 110 parts of coconut bran, 55 parts of eggshell powder, 55 parts of first modified eggshell powder, and 55 parts of second modified eggshell powder;
[0112] The first modified eggshell powder is a high-temperature modified eggshell powder; the second modified eggshell powder is a hydrogen peroxide modified eggshell powder; the first modified eggshell powder is prepared by crushing the eggshell powder into 180 meshes, and high-temperature treating the eggshell powder in a muffle furnace at 440° C. for 1.6 hours to obtain the first modified eggshell powder; the second modified eggshell powder is prepared by placing the eggshell powder in 24% hydrogen peroxide, stirring for 28 minutes, and then standing for 2.6 hours to obtain the second modified eggshell powder;
[0113] (2) Sugarcane planting:
[0114] 2.1) Planting sugarcane: The sugarcane variety is Guiliu 05136. Before planting sugarcane, treat the sugarcane seed stems with 54°C hot water for 8 hours, and then soak the sugarcane seed stems in a mixture of lime and sodium bicarbonate for 7 hours to prevent the perennial sugarcane from being dwarfed due to soil compaction caused by mechanical harvesting of sugarcane. The mass fraction of lime in the mixture of lime and sodium bicarbonate is 1.7%, and the mass fraction of sodium bicarbonate is 2.5%. From early February to early March, sow the sugarcane seed stems on the planting land pre-treated in step (1) according to a combination of 135 cm + 55 cm wide and narrow row spacing, with a sowing amount of 6,800 buds / mu, cover with soil, and cover with mulch film to complete mulch cultivation.
[0115] 2.3) Sugarcane field management: timely fertilization and weeding; timely spraying of pesticides according to the occurrence of sugarcane pests;
[0116] 2.4) Harvesting sugarcane: When sugarcane is ripe, harvest it in sunny weather;
[0117] (3) Sweet potato planting and management:
[0118] 3.1) Sweet potato planting: From late June to early July, sweet potatoes are planted between the sugarcane rows;
[0119] 3.2) Turning over green manure: before harvesting sugarcane, the sweet potato vines are harvested and the sweet potato tubers are dug out at the same time; after mechanically harvesting the sugarcane, the sweet potato tubers are first cut into multiple sections, and then the sweet potato vines and sweet potato tubers are turned over together under the soil between the sugarcane rows, and then the biogas slurry mixture is sprayed on the soil to assist the green manure in decomposition. The biogas slurry mixture is composed of the following raw materials in parts by weight: 110 parts of biogas slurry, 7 parts of urea, and 0.25 parts of borax.
[0120] Comparative Example 4
[0121] A method for turning over green manure to repair soil compaction after sugarcane harvesting, planting location: Wuming District, Nanning City, Guangxi, comprising the following steps:
[0122] (1) Pretreatment of planting land: select a plot with loose and fertile soil as a sugarcane planting land; prepare the land, mechanically plow it to a depth of 32 cm, level it, apply 430 kg / mu of sheep manure as base fertilizer, and then apply 330 kg / mu of mechanically compacted soil conditioner to obtain a pretreated planting land; the mechanically compacted soil conditioner is applied at a depth of 27 cm, and the base fertilizer is directly applied on top of the mechanically compacted soil conditioner; the mechanically compacted soil conditioner is composed of the following raw materials in parts by weight: 110 parts of coconut bran, 55 parts of eggshell powder, 55 parts of first modified eggshell powder, and 55 parts of second modified eggshell powder;
[0123] The first modified eggshell powder is a high-temperature modified eggshell powder; the second modified eggshell powder is a hydrogen peroxide modified eggshell powder; the first modified eggshell powder is prepared by crushing the eggshell powder into 180 meshes, and high-temperature treating the eggshell powder in a muffle furnace at 440° C. for 1.6 hours to obtain the first modified eggshell powder; the second modified eggshell powder is prepared by placing the eggshell powder in 24% hydrogen peroxide, stirring for 28 minutes, and then standing for 2.6 hours to obtain the second modified eggshell powder;
[0124] (2) Sugarcane planting:
[0125] 2.1) Planting sugarcane: The sugarcane variety is Guiliu 05136. Before planting sugarcane, treat the sugarcane seed stems with 54°C hot water for 8 hours, and then soak the sugarcane seed stems in a mixture of lime and sodium bicarbonate for 7 hours to prevent the perennial sugarcane from being dwarfed due to soil compaction caused by mechanical harvesting of sugarcane. The mass fraction of lime in the mixture of lime and sodium bicarbonate is 1.7%, and the mass fraction of sodium bicarbonate is 2.5%. From early February to early March, sow the sugarcane seed stems on the planting land pre-treated in step (1) according to a combination of 135 cm + 55 cm wide and narrow row spacing, with a sowing amount of 6,800 buds / mu, cover with soil, and cover with mulch film to complete mulch cultivation.
[0126] 2.3) Sugarcane field management: timely fertilization and weeding; timely spraying of pesticides according to the occurrence of sugarcane pests;
[0127] 2.4) Harvesting sugarcane: When sugarcane is ripe, harvest it in sunny weather;
[0128] (3) Sweet potato planting and management:
[0129] 3.1) Sweet potato planting: From late June to early July, sweet potatoes are planted between the sugarcane rows;
[0130] 3.2) Sweet potato field management: During the sweet potato tuber expansion period, spread the mechanically harvested and compacted soil conditioner with a thickness of 3.8 cm in the sweet potato planting area;
[0131] 3.3) Turning over green manure: before harvesting sugarcane, the sweet potato vines are harvested, and the sweet potato tubers are dug out and moved out of the planting site; after mechanically harvesting the sugarcane, the sweet potato vines are turned over and pressed under the soil between the sugarcane rows, and then a biogas slurry mixture is sprayed on the soil to assist the green manure in decomposing. The biogas slurry mixture is composed of the following raw materials in parts by weight: 110 parts of biogas slurry, 7 parts of urea, and 0.25 parts of borax.
[0132] The soil compacted by sugarcane harvesting was repaired according to the soil repair methods of Examples 1-5 and Comparative Examples 1-4. The statistical results are shown in Table 1 below:
[0133] Table 1
[0134] project Number of earthworms in the soil tillage layer (worms / square meter) <![CDATA[Soil bulk density (g / cm 3 ).]]> Soil porosity (%) Is there any frost damage to sweet potato? Is the ratoon sugarcane dwarfed? Example 1 160-180 ≤1.0 58.5-59.6 no no Example 2 160-180 ≤1.0 58.5-59.6 no no Example 3 160-180 ≤1.0 58.5-59.6 no no Example 4 160-180 ≤1.0 58.5-59.6 no About 1.5% of ratoon sugarcane is dwarfed Example 5 140-160 ≤1.0 57.5-58.6 no no Comparative Example 1 130-150 1.05-1.15 56.5-57.5 no no Comparative Example 2 70-90 1.15-1.25 53.5-52.5 ---- About 2.3% of ratoon sugarcane is dwarfed Comparative Example 3 120-130 1.08-1.17 55.5-56.6 yes About 0.6% of ratoon sugarcane is dwarfed Comparative Example 4 100-110 1.09-1.21 55.2-56.4 no About 0.8% of ratoon sugarcane is dwarfed
[0135] From the statistical results of Table 1, it can be seen that the method of turning over green manure to repair the compacted soil of sugarcane mechanized harvesting of the present invention, for the compacted soil of sugarcane mechanized harvesting, adopts mechanical deep ploughing, applying the compacted soil conditioner of mechanized harvesting, interplanting sweet potatoes, applying the compacted soil conditioner of mechanized harvesting, and turning over the sweet potato vines and sweet potato tubers as green manure, which can effectively reduce the density of compacted soil, increase the gaps between soils, help precipitation to quickly penetrate into the soil, reduce the occurrence of surface runoff, and also increase the number of beneficial microorganisms in the soil, increase the content of soil organic matter, change the environment around the root system, thereby reducing the soil hardness, reducing the difficulty of root system to go down due to soil compaction, helping the growth of sugarcane rhizomes, and improving the root system strength of sugarcane. It can effectively improve the compaction of soil caused by mechanized harvesting of sugarcane; the eggshell powder is modified by high temperature and hydrogen peroxide. The high temperature modification can increase the specific surface area of the eggshell powder by about one time, further improving the looseness of the soil; the hydrogen peroxide modification can further slow-release the phosphorus and calcium in the eggshell powder, which is more beneficial to the growth of sugarcane roots; the unmodified eggshell powder provides a better growth environment for beneficial microorganisms in the soil, further changing the environment around the sugarcane roots; coconut bran, eggshell powder, the first modified eggshell powder, and the second modified eggshell powder are mixed in proportion to form a mechanized compaction soil conditioner, which can promote the growth of sugarcane roots, increase the looseness of the soil, and increase the number of beneficial microorganisms, thereby effectively improving the compaction of soil caused by mechanized harvesting of sugarcane. From late June to early July, sweet potatoes are planted between the sugarcane rows. During the sweet potato tuber swelling period, mechanically compacted soil conditioner is sprinkled in the sweet potato planting area. On the one hand, mechanically compacted soil conditioner can increase the looseness and air permeability of the soil. On the other hand, mechanically compacted soil conditioner plays a role in heat preservation, preventing frost and freezing damage caused by cold weather. Unfrozen sweet potatoes can provide richer organic matter. The sweet potato vines and sweet potato tubers are turned over and pressed together under the soil between the sugarcane rows to mature, which can further enrich the number of beneficial bacteria in the sugarcane root system, thereby improving the soil structure, increasing the soil organic matter content, and improving the root system of sugarcane, thereby effectively improving the mechanically compacted soil of sugarcane. Before planting sugarcane, treat the sugarcane seed stems with 54°C hot water for 8 hours, and then Soaking the stems in a mixture of lime and sodium bicarbonate for 6 to 8 hours can effectively prevent the dwarfing of perennial sugarcane caused by soil compaction by sugarcane harvesters; turning the sweet potato vines and sweet potato tubers together under the soil between the sugarcane rows, and then spraying the biogas slurry mixture on the soil to assist in the decomposition of green manure. The green manure has a better decomposition effect, can effectively increase the soil organic matter content, change the environment around the roots, thereby reducing soil hardness, and alleviate the difficulty of root growth caused by soil compaction, which is conducive to the growth of sugarcane rhizomes and improves the root strength of sugarcane, thereby effectively improving the soil compaction caused by sugarcane harvesters; the biogas slurry mixture also includes borax, which can prolong the soil boron supply time. Borax can participate in the metabolism of sugarcane growth hormones, promote sugarcane's absorption of nutrients such as calcium, and promote stable and increased sugarcane yields.
[0136] Although the present invention has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements may be made thereto based on the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection claimed by the present invention.
Claims
1. A method for turning over green manure to repair soil compaction during sugarcane harvesting, characterized in that: The following steps are involved: (1) Pretreatment of the planting site: selecting a plot of land with loose soil and fertile soil as the sugarcane planting site; preparing the land, mechanically ploughing 30-35 cm deep, leveling, applying base fertilizer, and then applying 300-350 kg / mu of mechanically compacted soil conditioner to obtain a pretreated planting site; the mechanically compacted soil conditioner is applied at a depth of 25-30 cm; the mechanically compacted soil conditioner is composed of the following raw materials in parts by weight: 100-120 parts of coconut bran, 50-60 parts of eggshell powder, 50-60 parts of first modified eggshell powder, and 50-60 parts of second modified eggshell powder; The first modified eggshell powder is a high temperature modified eggshell powder; the second modified eggshell powder is a hydrogen peroxide modified eggshell powder; The preparation method of the second modified eggshell powder is as follows: placing the eggshell powder in hydrogen peroxide with a mass fraction of 23-25%, stirring for 25-30 minutes, and then standing for 2.5-2.8 hours to obtain the second modified eggshell powder; (2) Sugarcane planting: 2.1) Planting sugarcane: From early February to early March, sow sugarcane seed stems on the planting land pre-treated in step (1) according to the combination of 135cm + 55cm wide and narrow row spacing, cover with soil, and cover with film to complete film-covered cultivation; Before planting sugarcane, treat the sugarcane stems with 54°C hot water for 8 hours, and then soak them in a mixture of lime and sodium bicarbonate for 6 to 8 hours to prevent the perennial sugarcane from becoming dwarfed due to soil compaction caused by sugarcane harvesting; 2.2) Sugarcane field management: timely fertilization and weeding; timely spraying of pesticides according to the occurrence of sugarcane pests; 2.3) Harvesting sugarcane: When sugarcane is ripe, harvest it in sunny weather; (3) Sweet potato planting and management: 3.1) Sweet potato planting: From late June to early July, sweet potatoes are planted between the sugarcane rows; 3.2) Sweet potato field management: During the sweet potato tuber expansion period, the machine-harvested and compacted soil conditioner is spread in a thickness of 3.5 to 4 cm in the sweet potato planting area; 3.3) Turning over green manure: Before harvesting sugarcane, harvest the sweet potato vines and dig out the sweet potato tubers at the same time; after mechanically harvesting the sugarcane, turn over the sweet potato vines and sweet potato tubers together under the soil between the sugarcane rows to decompose.
2. The method for turning over green manure to repair soil compaction during sugarcane harvesting according to claim 1, characterized in that: The mechanically harvested and compacted soil conditioner in step (1) is composed of the following raw materials in parts by weight: 110-120 parts of coconut bran, 55-60 parts of eggshell powder, 55-60 parts of first modified eggshell powder, and 55-60 parts of second modified eggshell powder.
3. The method for turning over green manure to repair soil compaction during sugarcane harvesting according to claim 1, characterized in that: The preparation method of the first modified eggshell powder in step (1) is: crush the eggshell powder into 150-200 meshes, and treat it at high temperature in a muffle furnace at 430-450° C. for 1.5-1.8 hours to obtain the first modified eggshell powder.
4. The method for turning over green manure to repair soil compaction during sugarcane harvesting according to claim 1, characterized in that: In the step (1), 400-450 kg / mu of sheep manure is applied as base fertilizer.
5. The method for turning over green manure to repair soil compaction during sugarcane harvesting according to claim 1, characterized in that: In the step 2.1), from early February to early March, the sugarcane stems are sown on the planting land pre-treated in step (1) according to the combination of 135 cm + 55 cm wide and narrow row spacing, with a sowing amount of 6500-7000 buds / mu, and the soil is covered with film to complete the film cultivation.
6. The method for turning over green manure to repair soil compaction during sugarcane harvesting according to claim 1, characterized in that: The mass fraction of lime in the mixed solution of lime and sodium bicarbonate is 1.6-1.8%, and the mass fraction of sodium bicarbonate is 2-3%.
7. The method for turning over green manure to repair soil compaction during sugarcane harvesting according to claim 6, characterized in that: Before planting sugarcane in step 2.1), the sugarcane seed stems are first treated with hot water at 54° C. for 8 hours, and then the sugarcane seed stems are soaked in a mixture of lime and sodium bicarbonate for 7 to 8 hours to prevent the perennial sugarcane from being dwarfed due to soil compaction caused by mechanical harvesting of sugarcane; the mass fraction of lime in the mixture of lime and sodium bicarbonate is 1.7 to 1.8%, and the mass fraction of sodium bicarbonate is 2.5 to 3%.
8. The method for turning over green manure to repair soil compaction during sugarcane harvesting according to claim 1, characterized in that: In the step 3.3), the sweet potato vines and sweet potato tubers are pressed together under the soil between the sugarcane rows, and then the biogas slurry mixture is sprayed on the soil to assist the green manure in decomposing. The biogas slurry mixture is composed of the following raw materials in parts by weight: 100-120 parts of biogas slurry and 6-8 parts of urea.
9. The method for turning over green manure to repair soil compaction during sugarcane harvesting according to claim 8, characterized in that: The biogas slurry mixture also includes 0.2 to 0.3 parts by weight of borax.