Method beneficial to improvement of quality of corn in saline-alkali soil

Abstract

The invention provides a method for improving the quality of corn in saline-alkali soil, and belongs to the technical field of soil improvement. The method comprises the following steps: (1) uniformly spreading an organic fertilizer, a base fertilizer and a modifier on the surface of a land after watering and air-drying the land, and preparing the land by using a deep ploughing machine; (2) topdressing: topdressing urea in the small horn mouth, large horn mouth, heading and grouting early and middle periods of corn; (3) irrigation: irrigating from a seedling stage to a middle grouting stage; (4) after the corn is mature, harvesting the corn; according to the method, base fertilizer and organic fertilizer are applied before soil preparation, it is guaranteed that after corn sprouts, corn roots can absorb nutrient substances needed by growth and development from the soil, root growth is promoted, and the survival rate of the corn is increased; in addition, the modifier is applied before soil preparation, and the modifier is mixed with other components for use, so that the soil improvement effect of the modifier is obviously improved, and the yield and quality of the planted corn are obviously improved.

Description

Technical Field

[0001] The invention belongs to the technical field of soil improvement, and in particular relates to a method that helps improve the quality of corn in saline-alkali land. Background Art

[0002] At present, the population is constantly increasing, but the cultivated land area is shrinking with urbanization, and food shortage has become a problem that needs to be solved urgently. Therefore, while mentioning the grain output per unit of land, starting to develop available land and increase the cultivated land area has become one of the important ways to solve the current situation of land area reduction and food shortage.

[0003] Saline-alkali soil refers to soil formed by salinization under the combined influence of different natural conditions and human activities, in which salts participate in the soil formation process. This type of soil has a salinization layer, and the healthier soil contains excessive soluble salts. The soil has poor physical and chemical properties, which inhibits the normal growth of plants and causes the plants to fail to survive.

[0004] Excessive salt can easily cause drastic changes in some of the physical and chemical properties of the soil. + , K + , Ca 2+ Mg 2+ and anion Cl - 、SO4 2- 、CO3 2- , and HCO3 - It is the main salt that causes high soil salt content. High concentration of Na + Ions will continue to replace Ca in the soil 2+ Mg 2+ , destroying the clay composition of the soil, exchangeable Na + It is hydrolyzed in large quantities, weakening the bonding between soil clay particles and destroying soil agglomeration. Such soil ecosystems are often more fragile and easily affected by changes in the external environment. After a long period of lack of precipitation, the saline soil structure will become more compact, the water storage capacity will decrease, and the shear strength will increase. Small clay particles move in the soil and eventually block the soil pores, reducing hydraulic conductivity.

[0005] Soil salinization will damage the ecological environment in the soil and affect the respiration, degradation, nitrification and denitrification processes of microorganisms. The salt content in the soil is also an important factor affecting crop yields. Excessive base ion content will lead to a large reduction in crop yields or even death, especially in the seed germination stage. Crops have poor resistance to salt stress. High soluble base ion content in the soil will reduce the germination rate of seeds. The seed germination process requires a certain amount of water to hydrolyze the starch in the endosperm and activate various enzymes. The high osmotic pressure environment caused by salt stress hinders the seeds from absorbing external water. At the same time, the high salt environment will destroy the permeability and ion regulation ability of the cell membrane, increasing the probability of seeds being harmed by salt.

[0006] Soil microorganisms are an indispensable part of the stability of the soil ecological environment. They not only regulate the soil's fertilizer supply capacity and the transformation and circulation of soil organic matter, but also directly provide nutrients and oxygen for plant growth. Studies have found that salt in the soil can have an adverse effect on the abundance, diversity and composition of microorganisms in the soil.

[0007] Corn is an important food crop and feed crop with great production potential and high economic benefits. It can be used for food, feed and various industrial purposes, and plays an important strategic role in ensuring food security. In recent years, the planting area and output of corn in various regions have generally shown a stable growth trend. At present, a complete industrial chain covering corn planting and production, corn processing, circulation, and consumption of corn and its processed products has been formed. In recent years, the deep processing capacity of corn has been huge, which is an important driving force for corn consumption.

[0008] Corn is a crop that is not tolerant to salt and alkali. When the soil salt and alkali content exceeds 0.2%-0.25%, corn cannot grow normally. The manifestations are short plants, dark green leaves, and even dead leaves and seedlings. Generally speaking, corn has a high salt tolerance during the germination period. As long as the salt content is not too high, it will not have a significant effect on the germination rate. After emergence, the salt tolerance of corn weakens, and when the soil salt and alkali content exceeds 0.2%-0.25%, it is very vulnerable. After jointing, the salt tolerance gradually increases, and by the peak growth period, the salt tolerance can reach 0.25%-0.35% (soil salt content).

[0009] Chinese patent CN116135005A discloses a high-yield corn planting method suitable for saline-alkali land, which includes the following steps: land preparation, autumn irrigation, application of organic fertilizer, rotary tillage, application of base fertilizer, sowing, topdressing and irrigation. The invention mainly uses drip irrigation with organic fertilizer, and chemical fertilizer is mainly topdressing. The drip irrigation system reduces the sensitivity of crops to salt and effectively reduces the waste of water and fertilizer. The organic fertilizer used can improve the microbial community in the root zone of crops, improve the soil, improve soil fertility, enhance the soil's ability to retain and supply fertilizer and buffer capacity, and accelerate the decomposition of organic matter. The active substances produced can not only promote the growth of crops and improve the yield and quality of corn, but also increase the per-acre yield of corn.

[0010] However, the existing methods cannot effectively solve the problem of soil salinization from the root, and are not effective in improving the abundance and diversity of microorganisms. Therefore, it is necessary to develop a method that can help improve the quality of corn in saline-alkali land. Summary of the invention

[0011] Based on the deficiencies in the prior art, the present invention aims to provide a method that helps to improve the quality of corn in saline-alkali land. Through the selection of fertilizers and improvers, the present invention significantly improves the yield and quality of the corn planted, and also significantly improves the abundance and diversity of microorganisms in the root zone.

[0012] In order to achieve the above object, the present invention adopts the following technical solution:

[0013] A method for improving the quality of corn in saline-alkali land, comprising the following steps:

[0014] (1) After watering and air drying, evenly spread organic fertilizer, base fertilizer and improver on the surface of the land, and use a deep tiller to prepare the land;

[0015] (2) Topdressing: Apply urea during the early to middle stages of corn budding, budding, heading, and grain filling;

[0016] (3) Irrigation: Irrigation is carried out from the seedling stage to the middle of grain filling;

[0017] (4) After the corn is mature, it is harvested.

[0018] The organic fertilizer in the above step (1) is one or more of plant straw, cow dung, pig dung and chicken dung;

[0019] Preferably, the organic fertilizer is a mixture of plant straw and pig manure.

[0020] The base fertilizer in step (1) is a mixture of diammonium phosphate, potassium sulfate and urea;

[0021] Preferably, the base fertilizer is diammonium phosphate, potassium sulfate and urea in a ratio of 2-4:2-3:0.5-1.5;

[0022] More preferably, the base fertilizer is diammonium phosphate, potassium sulfate and urea in a ratio of 3:2.5:1.2.

[0023] As some preferred implementation schemes, the application amount of diammonium phosphate is 10-20 kg / mu; preferably, the application amount of diammonium phosphate is 12-18 kg / mu; more preferably, the application amount of diammonium phosphate is 14-16 kg / mu.

[0024] As some preferred implementation schemes, the application amount of potassium sulfate is 10-15 kg / mu; preferably, the application amount of potassium sulfate is 11-14 kg / mu; more preferably, the application amount of diammonium phosphate is 12-13 kg / mu.

[0025] As other preferred embodiments, the application amount of urea is 2.5-7.5 kg / mu; preferably, the application amount of urea is 3-6 kg / mu; more preferably, the application amount of urea is 4-6 kg / mu.

[0026] As a preferred embodiment, the application amount of the base fertilizer is 15 kg / mu of diammonium phosphate, 12.5 kg / mu of potassium sulfate and 6 kg / mu of urea.

[0027] The improver in step (1) above comprises a mixture of microorganisms, apatite, ferrous sulfate and furfural residue;

[0028] Preferably, the improver in step (1) above comprises a mixture of 5-10 parts of composite microorganisms, 10-25 parts of phosphate lime, 1-5 parts of ferrous sulfate and 20-40 parts of furfural residue;

[0029] Preferably, the composite microorganism is a mixture of Bacillus licheniformis, Bacillus subtilis, Bacillus amyloliquefaciens and Pseudomonas perforin;

[0030] The mass ratio of Bacillus licheniformis, Bacillus subtilis, Bacillus amyloliquefaciens and Pseudomonas perforin is 2-5:1-2:1-2:1.

[0031] Preferably, the mass ratio of Bacillus licheniformis, Bacillus subtilis, Bacillus amyloliquefaciens and Pseudomonas perforin is 5:2:2:1.

[0032] The Bacillus licheniformis was numbered ZJ1043 and purchased from China General Microbiological Culture Collection Center;

[0033] The Bacillus subtilis, numbered as YL6, was purchased from China General Microbiological Culture Collection Management Center;

[0034] The Bacillus amyloliquefaciens, numbered HK1, was purchased from China General Microbiological Culture Collection Center;

[0035] The perforin Pseudomonas was numbered as XM-39 and purchased from China General Microbiological Culture Collection Center.

[0036] As a preferred embodiment, the improver in step (1) comprises a mixture of 8 parts of composite microbial agent, 20 parts of apatite, 4 parts of ferrous sulfate and 30 parts of furfural residue.

[0037] The mass ratio of the composite microbial agent to ferrous sulfate is 1-6:1, preferably 2:1.

[0038] The deep tillage depth described in the above step (1) is 0.3-0.5m.

[0039] The application amount of the organic fertilizer in the above step (1) is 250-350 kg / mu.

[0040] The application amount of the improver described in the above step (1) is 100-200 kg / mu.

[0041] In the topdressing described in the above step (2), the amount of urea applied each time is 5-10 kg / mu; preferably 6-9 kg / mu; more preferably 7-8 kg / mu.

[0042] The specific process of the irrigation described in the above step (3) is as follows: in the seedling stage, according to the soil moisture and seedling conditions, irrigate 0-2 times (when the soil mass moisture content is greater than 23% and the germination rate is higher than 90%, irrigate 0 times; when the soil mass moisture content is greater than 18% and less than 23% and the germination rate is lower than 90%, irrigate once; when the soil mass moisture content is lower than 18% and the germination rate is lower than 75%, irrigate twice), from mid-June to the large trumpet stage, irrigate once every 10 days, and from the large trumpet to the middle of the filling period, irrigate once every 5 days.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] (1) The present invention applies base fertilizer and organic fertilizer before land preparation, and uses a deep tillage machine to cover the base fertilizer and organic fertilizer below the ground, so as to ensure that after the corn germinates, the corn root system can absorb nutrients required for growth and development from the soil, promote root growth, and enhance its own survival rate;

[0045] (2) The present invention also applies an improver before land preparation, and adds composite microorganisms to the improver. By controlling the content and mass ratio of the microorganisms and mixing them with other components, the improver's effect on soil improvement is significantly improved, and the abundance and diversity of microorganisms in the root zone are also significantly improved, ultimately significantly improving the yield and quality of the corn grown. DETAILED DESCRIPTION

[0046] The above features mentioned in the present invention or the features mentioned in the embodiments can be combined in any way. All the features explained in the specification of this case can be used in combination with any method form, and each feature disclosed in the specification can be replaced by any alternative feature that can provide the same, equal or similar purpose. Therefore, unless otherwise specified, the disclosed features are only general examples of equal or similar features.

[0047] The present invention will be further described below in conjunction with specific examples. These examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In the following examples, the implementation methods for specifying specific conditions are usually based on conventional conditions or the conditions recommended by the manufacturer. Unless otherwise specified, all percentages and fractions are by weight.

[0048] Unless otherwise defined, all professional and scientific terms used herein have the same meanings as those known to those skilled in the art. In addition, any methods and materials similar or equivalent to those described herein can be applied to the methods of the present invention. The preferred implementation methods and materials described herein are for demonstration purposes only.

[0049] Basic Example: Activation Culture of Composite Microorganisms

[0050] 1. Bacteria activation:

[0051] First, each strain was activated in LB culture medium, and the activated strain was inoculated into LB liquid culture medium and cultured at 28°C for 12h.

[0052] 2. Cultivation of seed solution:

[0053] The composition of the seed liquid culture medium is: peptone 20g / L, yeast extract 6g / L, glucose 15g / L, NaCl 8g / L, pH value is 7.3. The activated strain is inoculated into the seed liquid culture medium at an inoculum of 1.5%, and cultured in a shaking incubator at 28°C, with a rotation speed of 200rpm, for 12 hours.

[0054] 3. Fermentation tank culture

[0055] The fermentation medium composition is: soybean powder 25g / L, potato starch 15g / L, yeast extract powder 3g / L, peptone 3.0g / L, sucrose 5.5g / L, KH2PO4 0.5g / L, MgSO4·7H2O 0.06g / L, MnSO4·7H2O0.02g / L, (NH4)2SO45.5g / L, polyether defoamer 1.2g / L, pH 7.2. 600 When it reaches 5.00, add 5% inoculum into the fermentation tank, 37℃, stirring speed is 150rpm, adjust the ventilation volume to ensure that the dissolved oxygen is above 50%, and the tank pressure is 0.05Mpa. After 24 hours of fermentation, the bacterial count reaches 10 10 cfu / ml, obtain fermentation broth, prepare solid bacterial agent from the fermentation broth, and mix the solid bacterial agents to obtain composite microorganisms.

[0056] Example 1 A method for improving the quality of corn in saline-alkali land

[0057] The steps include:

[0058] (1) After watering and air drying, evenly spread organic fertilizer, base fertilizer and improver on the surface of the land, and use a deep tiller to prepare the land;

[0059] Organic fertilizer is a mixture of plant straw and pig manure, and the application rate is 250kg / mu;

[0060] The base fertilizer is a mixture of diammonium phosphate, potassium sulfate and urea; the application amount of the diammonium phosphate is 10kg / mu; the application amount of the potassium sulfate is 10kg / mu; and the application amount of the urea is 2.5kg / mu.

[0061] The improver includes a mixture of 5 parts of composite microorganisms, 10 parts of phosphate lime, 1 part of ferrous sulfate and 20 parts of furfural residue; the application amount of the improver is 100 kg / mu;

[0062] The composite microorganism is a mixture of Bacillus licheniformis, Bacillus subtilis, Bacillus amyloliquefaciens and Pseudomonas perforinus; the mass ratio is 2:1:1:1;

[0063] The deep plowing depth is 0.3m.

[0064] (2) Topdressing: Apply urea during the early to middle stages of corn budding, budding, heading, and grain filling;

[0065] The amount of urea applied each time is 5kg / mu;

[0066] (3) Irrigation: Irrigation is carried out from the seedling stage to the middle of grain filling;

[0067] Irrigation: The specific process is as follows: in the seedling stage, irrigate 0-2 times according to soil moisture and seedling conditions (when the soil mass moisture content is greater than 23% and the seedling emergence rate is higher than 90%, irrigate 0 times; when the soil mass moisture content is greater than 18% and less than 23% and the seedling emergence rate is lower than 90%, irrigate 1 time; when the soil mass moisture content is lower than 18% and the seedling emergence rate is lower than 75%, irrigate 2 times), from mid-June to the large trumpet stage, irrigate once every 10 days, and from the large trumpet to the middle of the filling period, irrigate once every 5 days.

[0068] (4) After the corn is mature, it is harvested.

[0069] Example 2 A method for improving the quality of corn in saline-alkali land

[0070] The steps include:

[0071] (4) After the land is watered and air-dried, evenly spread organic fertilizer, base fertilizer and improver on the surface of the land, and use a deep tiller to prepare the land;

[0072] Organic fertilizer is a mixture of plant straw and pig manure, and the application rate is 350kg / mu;

[0073] The base fertilizer is a mixture of diammonium phosphate, potassium sulfate and urea; the application amount of the diammonium phosphate is 20kg / mu; the application amount of the potassium sulfate is 15kg / mu; and the application amount of the urea is 7.5kg / mu.

[0074] The improver includes a mixture of 10 parts of composite microorganisms, 25 parts of phosphate lime, 5 parts of ferrous sulfate and 40 parts of furfural residue; the application amount of the improver is 200 kg / mu;

[0075] The composite microorganism is a mixture of Bacillus licheniformis, Bacillus subtilis, Bacillus amyloliquefaciens and Pseudomonas perforinus; the mass ratio is 4:2:1:1;

[0076] The deep plowing depth is 0.5m.

[0077] (5) Topdressing: Apply urea during the early and middle stages of corn budding, budding, heading, and grain filling;

[0078] The amount of urea applied each time is 10kg / mu;

[0079] (6) Irrigation: Irrigation is carried out from the seedling stage to the middle of grain filling;

[0080] Irrigation: The specific process is as follows: in the seedling stage, irrigate 0-2 times according to soil moisture and seedling conditions (when the soil mass moisture content is greater than 23% and the seedling emergence rate is higher than 90%, irrigate 0 times; when the soil mass moisture content is greater than 18% and less than 23% and the seedling emergence rate is lower than 90%, irrigate 1 time; when the soil mass moisture content is lower than 18% and the seedling emergence rate is lower than 75%, irrigate 2 times), from mid-June to the large trumpet stage, irrigate once every 10 days, and from the large trumpet to the middle of the filling period, irrigate once every 5 days.

[0081] (4) After the corn is mature, it is harvested.

[0082] Example 3 A method for improving the quality of corn in saline-alkali land

[0083] The steps include:

[0084] (7) After the land is watered and air-dried, evenly spread organic fertilizer, base fertilizer and improver on the surface of the land, and use a deep tiller to prepare the land;

[0085] Organic fertilizer is a mixture of plant straw and pig manure, and the application rate is 300kg / mu;

[0086] The base fertilizer is a mixture of diammonium phosphate, potassium sulfate and urea; the application amount of the diammonium phosphate is 15kg / mu; the application amount of the potassium sulfate is 12.5kg / mu; and the application amount of the urea is 6kg / mu.

[0087] The improver includes a mixture of 8 parts of composite microbial agent, 20 parts of phosphate lime, 4 parts of ferrous sulfate and 30 parts of furfural residue; the application amount of the improver is 150 kg / mu;

[0088] The composite microorganism is a mixture of Bacillus licheniformis, Bacillus subtilis, Bacillus amyloliquefaciens and Pseudomonas perforinus; the mass ratio is 5:2:2:1;

[0089] The deep plowing depth is 0.5m.

[0090] (8) Topdressing: Apply urea during the early and middle stages of corn budding, budding, heading, and grain filling;

[0091] The amount of urea applied each time is 7.5kg / mu;

[0092] (9) Irrigation: Irrigation is carried out from the seedling stage to the middle of grain filling;

[0093] Irrigation: The specific process is as follows: in the seedling stage, irrigate 0-2 times according to soil moisture and seedling conditions (when the soil mass moisture content is greater than 23% and the seedling emergence rate is higher than 90%, irrigate 0 times; when the soil mass moisture content is greater than 18% and less than 23% and the seedling emergence rate is lower than 90%, irrigate 1 time; when the soil mass moisture content is lower than 18% and the seedling emergence rate is lower than 75%, irrigate 2 times), from mid-June to the large trumpet stage, irrigate once every 10 days, and from the large trumpet to the middle of the filling period, irrigate once every 5 days.

[0094] (4) After the corn is mature, it is harvested.

[0095] Comparative Example 1

[0096] The difference from Example 3 is that the improver does not contain ferrous sulfate, the content of apatite is increased to 24, and the rest is the same as Example 3.

[0097] Comparative Example 2

[0098] The difference from Example 3 is that the mass ratio of the composite microbial agent to ferrous sulfate is 1:2, that is, 4 parts of the composite microbial agent and 8 parts of ferrous sulfate, and the rest is the same as Example 3.

[0099] Comparative Example 3

[0100] The difference from Example 3 is that the composite microorganism does not contain Bacillus licheniformis and Bacillus subtilis, the mass ratio of Bacillus amyloliquefaciens to Pseudomonas perforin is 1:1, and the rest is the same as Example 3.

[0101] Comparative Example 4

[0102] The difference from Example 3 is that the mass ratio of Bacillus licheniformis, Bacillus subtilis, Bacillus amyloliquefaciens and Pseudomonas perforin is 1:2:2:5, and the rest is the same as Example 3.

[0103] Effect Experiment

[0104] 1. Corn growth promotion experiment

[0105] Select full and healthy corn (Zhengdan 958) seeds for disinfection and cleaning, and punch and sow the treated corn seeds. The row spacing is 60 cm, the spacing between adjacent holes is 27 cm, the sowing depth is 5 cm, and 3 corn seeds are placed in each hole, and the holes are covered with loose soil. After the seeds germinate, 2-3 corn seeds are replanted in the ungerminated holes with a sowing depth of 5 cm. After 30 days of planting, 30 corn seedlings are taken in an S-shaped manner to measure the stem height, root length, stem fresh weight, root fresh weight, stem dry weight, and root dry weight of the corn seedlings. The average value is taken and compared with the blank control group to calculate the increase rate.

[0106] Blank control group: The soil without amendment was used for planting, and the method was the same as above.

[0107] The test results are shown in Table 1 below.

[0108] Table 1

[0109]

[0110] According to the test results in Table 1 above, the corn planted by the method provided in Examples 1-3 of the present invention has a longer stem height and root length than the blank control group, indicating that the planting method provided in Examples 1-3 of the present invention can make the corn grow better, and the stem fresh weight, root fresh weight, stem dry weight and root dry weight of the corn are significantly increased compared with the blank control group, further indicating that the corn planted by the method provided by the present invention has a better growth effect, and the corn root system can absorb the nutrients required for growth and development from the land, promote root growth, and enhance its own survival rate. In the comparative example, changing the type of ingredients in the improver or the mass ratio will affect the growth of the corn seedlings to a certain extent, thereby affecting the quality of the corn.

[0111] 2. Corn quality and yield testing

[0112] The quality and yield of the corn harvested after maturity were tested, and the yield per mu and 100-grain weight were tested. The test results are shown in Table 2 below.

[0113] Table 2

[0114] Yield per mu / kg 100-grain weight / g Example 1 1185 22.8 Example 2 1218 23.1 Example 3 1254 24.5 Comparative Example 1 924 19.4 Comparative Example 2 934 19.8 Comparative Example 3 958 20.1 Comparative Example 4 964 20.8

[0115] According to the test results in Table 2 above, the corn planted by the method provided in Examples 1-3 of the present invention has a higher yield and 100-grain weight, indicating that the planting method provided in Examples 1-3 of the present invention can make the corn grow better, further indicating that the corn planted by the method provided by the present invention has a better growth effect, and the corn root system can absorb the nutrients required for growth and development from the land, promote root growth, and ensure the yield of corn. In the comparative example, changing the type of ingredients in the improver or the mass ratio will affect the growth of the corn seedlings to a certain extent, and then affect the fullness of the corn kernels.

[0116] The above are only preferred specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for improving the quality of corn grown in saline-alkali land, characterized in that: The steps include: (1) After watering and air drying, evenly spread organic fertilizer, base fertilizer and improver on the surface of the land, and use a deep tiller to prepare the land; (2) Topdressing: Apply urea during the early and middle stages of corn budding, budding, heading, and grain filling; (3) Irrigation: Irrigation is carried out from the seedling stage to the middle of grain filling; (4) harvesting the corn after it matures; The improver comprises a mixture of composite microorganisms, apatite, ferrous sulfate and furfural residue; the composite microorganisms are a mixture of Bacillus licheniformis, Bacillus subtilis, Bacillus amyloliquefaciens and Pseudomonas perforin; the mass ratio of the composite microbial agent to ferrous sulfate is 1-6:

1.

2. The method according to claim 1, characterized in that: The organic fertilizer described in step (1) is one or more of plant straw, cow dung, pig dung and chicken dung.

3. The method according to claim 1, characterized in that: The base fertilizer described in step (1) is a mixture of diammonium phosphate, potassium sulfate and urea; the mass ratio is 2-4:2-3:0.5-1.

5.

4. The method according to claim 1, characterized in that: The application amount of the diammonium phosphate is 10-20 kg / mu; the application amount of the potassium sulfate is 10-15 kg / mu; and the application amount of the urea is 2.5-7.5 kg / mu.

5. The method according to claim 4, characterized in that: The application amount of the base fertilizer is 15kg / mu of diammonium phosphate, 12.5kg / mu of potassium sulfate and 6kg / mu of urea.

6. The method according to claim 1, characterized in that: The improver described in step (1) comprises a mixture of 5-10 parts of composite microorganisms, 10-25 parts of phosphate lime, 1-5 parts of ferrous sulfate and 20-40 parts of furfural residue.

7. The method according to claim 1, characterized in that: The ratio of Bacillus licheniformis, Bacillus subtilis, Bacillus amyloliquefaciens and Pseudomonas perforin is 2-5:1-2:1-2:

1.

8. The method according to claim 7, characterized in that: The mass ratio of the Bacillus licheniformis, the Bacillus subtilis, the Bacillus amyloliquefaciens and the Pseudomonas perforin is 5:2:2:

1.

9. The method according to claim 1, characterized in that: The application amount of the organic fertilizer in step (1) is 250-350 kg / mu; the amount of urea applied in step (2) is 5-10 kg / mu each time.

10. The method according to claim 1, characterized in that: The application amount of the improver described in step (1) is 100-200kg / mu.

Images