Construction method and application of saline-alkali soil wheat rhizosphere suitable micro-domain

Abstract

The invention discloses a saline-alkali soil wheat rhizosphere suitable micro-domain construction method and application, and relates to the field of saline-alkali soil crop rhizosphere suitable micro-domain construction.According to the saline-alkali soil wheat rhizosphere suitable micro-domain construction method, by arranging a straw interlayer, a fertile plough layer and a cultivation layer in a saline-alkali soil layer, saline-alkali soil salinity reduction and salt return inhibition can be achieved; and the soil structure of the saline-alkali soil can be optimized. By the adoption of the wheat rhizosphere microdomain construction method, the soil condition of saline-alkali soil can be gradually improved, construction of the wheat rhizosphere microdomain is promoted, and construction of the wheat rhizosphere microdomain and high-yield planting of wheat are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of constructing a suitable rhizosphere micro-region for crops in saline-alkali land, and more specifically, to a method for constructing a suitable rhizosphere micro-region for wheat in saline-alkali land and its application in high-yield wheat cultivation. Background Art

[0002] Soil salinization is one of the important challenges faced by global agriculture and the environment. In saline-alkali soil, the content of available nutrients decreases, plants suffer from severe osmotic stress and ion toxicity, soil biodiversity decreases, and the aggregate structure is damaged. Relevant policy documents propose to carry out the treatment and improvement of saline-alkali cultivated land by region and category, integrate and promote measures to improve cultivated land quality, carry out comprehensive utilization pilot projects of cultivated land reserve resources such as saline-alkali land, and promote the combination of "planting according to the land" and "land adapting to planting". In recent years, many scientific researchers have taken various improvement measures in saline-alkali land treatment and made important progress. However, there are still many difficulties in the improvement and utilization of saline-alkali land: the treatment cycle of cultivated land salinization is long, the cost is high, water resources are severely restricted, the stability of the improved saline-alkali land is poor and it is easy to relapse, the technical support for low water consumption and high efficiency needs to be strengthened, and the problem of high crop yield needs to be solved urgently. Summary of the Invention

[0003] In view of this, the present invention provides a method for constructing a suitable rhizosphere micro-region for wheat in saline-alkali land and its application. This method can realize the construction of a suitable rhizosphere micro-region environment for wheat in saline-alkali land, resist salt interference, eliminate soil compaction in the rhizosphere, enhance air permeability and water permeability, and improve nutrient utilization rate.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A method for constructing a suitable rhizosphere micro-region for wheat in saline-alkali land, comprising the following steps:

[0006] (1) Deeply dig down the saline-alkali soil, lay straw on the leveled ground to form a straw interlayer;

[0007] (2) Spread organic materials, water-based resin-coated compound fertilizers and chemical fertilizers on the surface of the straw interlayer, then backfill the excavated soil, and after backfilling, deeply plow and turn over to form a fertile plow layer;

[0008] (3) Spray salt-tolerant biological functional substances on the surface layer of the fertile plow layer and cover with a film to form a cultivation layer.

[0009] Specifically, in step (1), the saline-alkali soil is dug deep downward and straw is laid to form a straw interlayer, so as to improve the soil structure and fertility and form a barrier to block the accumulation of salts and inhibit salt return. In addition, the recycling of crop straw is conducive to the realization of straw returning to the field, and at the same time avoids polluting the atmospheric environment by burning straw. The type of straw is not specifically limited. For example, common crop straw types such as wheat straw and corn straw can be used.

[0010] In step (2), the fertile plough layer is constructed with organic materials, water-based resin-coated compound fertilizer and conventional chemical fertilizers. After adding them back to the soil, they are deeply buried and covered, and deeply ploughed and turned over, which can achieve the purposes of rapidly increasing soil organic matter and improving soil structure. Adding water-based resin-coated compound fertilizer can delay nutrient release at low cost, enable wheat to stably absorb nutrients for a long time, and effectively resist the erosion of soil salts on nutrients. The input of organic materials can promote the optimization of soil structure, improve soil microbial activity and the stability of soil aggregates. After deep burial and covering, deep ploughing and turning over can break the plough sole, loosen the soil, cut off the capillary tubes, effectively prevent water evaporation and control salt return.

[0011] In step (3), a salt-tolerant biological functional substance is sprayed on the surface layer of the saline-alkali soil for wheat cultivation and covered with a film, so as to achieve salt tolerance enhancement of the symbiosis of organisms and crops in the saline-alkali soil, as well as the purposes of salt reduction and nutrient activation. The salt-tolerant biological functional substance can relieve the stress of saline-alkali soil through its own function, improve the soil ecological environment, promote the decomposition of organic materials and the decay of straw, and promote crop growth.

[0012] Covering the ground with a film can improve the soil water and heat conditions, promote crop growth, increase crop yield and the utilization rate of farmland precipitation. The covering type is not specifically limited and can be selected according to actual needs.

[0013] The construction of a suitable micro-region for the rhizosphere of wheat in saline-alkali land can achieve the stable and continuous release of nutrients in saline-alkali cultivated land, the rapid increase of soil organic matter, the construction of a fertile plough layer and biological enhancement through the above-mentioned water-based resin-coated compound fertilizer, organic materials and straw input, deep ploughing and turning over, and the addition of salt-tolerant biological functional substances. At the same time, it can promote the reduction of alkalinity and salt inhibition and the improvement of production capacity in saline-alkali land.

[0014] Preferably, in step (1), the deep digging depth is 35 - 40 cm, the straw laying thickness is 10 - 20 cm, the straw length is 1 - 2 cm, and the straw dosage is 5000 - 6000 kg / ha.

[0015] Typical but non-limiting laying thicknesses of the straw are 10 cm, 12 cm, 14 cm, 16 cm, 18 cm or 20 cm; typical but non-limiting lengths of the straw are 1 cm, 1.2 cm, 1.4 cm, 1.6 cm, 1.8 cm or 2 cm. By limiting the different laying thicknesses and lengths of the straw, the nutrient and carbon input amounts formed are different.

[0016] Preferably, the organic materials described in step (2) include one or more of humic acid, furfural residue, earthworm manure, cow dung or biochar, and the application amount of the organic materials is 30 - 40 t / ha. By specifically limiting the application amount and types of the organic materials, the optimization effect of the organic materials on the soil structure and fertility is more obvious.

[0017] Preferably, the nutrient content of the water-based resin-coated compound fertilizer described in step (2) is N-P2O5-K2O: 15-14-6, and the application amount of the water-based resin-coated compound fertilizer is 70 - 75 kg / ha.

[0018] Preferably, the chemical fertilizers and application amounts described in step (2) include 15 - 17 kg / ha of urea, 8 - 10 kg / ha of ammonium sulfate, 21 - 31 kg / ha of superphosphate, and 118 - 128 kg / ha of potassium sulfate.

[0019] Preferably, the deep plowing and deep turning depth described in step (2) is 20 - 30 cm.

[0020] It should be noted that the greater the amount of fertilizer and straw, the stronger the influencing ability, and appropriate optimization is required according to the local soil conditions; for different soil textures with poor soil permeability, the fertilizer application depth should be appropriately changed.

[0021] Preferably, the salt-tolerant biological functional substances described in step (3) include one or more of trace elements, seaweed polypeptides, polypeptide amino acids, seaweed polysaccharides or agricultural phages, and the application amount is 30 - 50 L / ha. When used, it is diluted with water at a ratio of 1:500 - 1:1000.

[0022] Typical but non-limiting application amounts of the salt-tolerant biological functional substances are, for example, 30 L / ha, 35 L / ha, 40 L / ha, 45 L / ha, 50 L / ha, and typical but non-limiting dilution ratios of the salt-tolerant biological functional substances are, for example, 1:500, 1:600, 1:700, 1:800, 1:900, 1:1000.

[0023] Preferably, in step (3), the film covering uses plastic film or liquid plastic film, and the film covering spacing is 10 - 20 cm.

[0024] The present invention also provides an application of the land treated by the method described in the above technical solution in high-yield wheat cultivation. Wheat crops are planted on the treated land, and topdressing is carried out at the green-reverting stage, jointing stage, and heading stage during the wheat planting process to supplement the deficiency of the base fertilizer and meet the nutritional requirements in the middle and late growth stages of wheat, and further improve the soil structure, reduce the salt damage, and increase the soil productivity and wheat yield. Specifically:

[0025] During the green-reverting stage of wheat, 25 - 35 kg / ha of carbon, 7 - 10 kg / ha of urea, 10 - 15 kg / ha of ammonium sulfate, 2 - 4 kg / ha of monoammonium phosphate, and 10 - 13 kg / ha of superphosphate are applied for topdressing to promote tillering, ear formation and ensure the number of ears per mu;

[0026] During the jointing stage of wheat, 115 - 125 kg / ha of carbon, 32 - 35 kg / ha of urea, 45 - 55 kg / ha of ammonium sulfate, 10 - 13 kg / ha of monoammonium phosphate, and 40 - 43 kg / ha of superphosphate are applied for topdressing to promote ear differentiation and increase the number of grains per ear;

[0027] During the heading stage of wheat, 25 - 35 kg / ha of carbon, 25 - 35 kg / ha of urea, and 43 - 46 kg / ha of ammonium sulfate are applied for topdressing to increase the 1000-grain weight and thus increase the wheat yield.

[0028] Preferably, the carbon includes one or more of humic acid, furfural residue, earthworm manure, cow dung or biochar. By specifically defining the applied carbon, its effect on improving the soil structure and increasing the crop yield is remarkable.

[0029] From the above technical solutions, it can be seen that compared with the prior art, the present invention discloses a method and application for constructing a rhizosphere suitable micro-region for wheat in saline-alkali land, having the following beneficial effects:

[0030] The construction of the rhizosphere suitable micro-region provided by the present invention forms a straw interlayer by laying straw during the wheat planting season in saline-alkali land, increases the soil organic matter content, blocks the salt accumulation and the salt rising channel with water, and inhibits the salt return on the soil surface; adds organic materials for biological decomposition to rapidly increase the soil organic matter content and at the same time enables fertile soil to take root; through deep burial coverage and deep plowing, breaks the soil plow sole, improves the soil structure, enhances the soil aeration and water permeability, and increases the organic matter mineralization rate to achieve the construction of a fertile plow layer; through the addition of salt-tolerant biological functional substances in the cultivation layer and plastic film covering, conducts biological strengthening to achieve biological root promotion and inhibit water evaporation and salt upward movement;

[0031] The construction of a rhizosphere suitable micro-region for wheat in saline-alkali land provided by the present invention can optimize the physical structure of the soil and balance the supply of soil nutrients by fertilizing and increasing carbon and reducing salt in the saline-alkali land soil. At the same time, it can reduce alkali and inhibit salt in the rhizosphere micro-region, and also strengthen the rhizosphere biological function, realizing the inhibition of salt and improvement of fertile soil in saline-alkali land with rhizosphere regulation as the core, and constructing a rhizosphere suitable micro-region for wheat in saline-alkali land.

[0032] The structure of the rhizosphere suitable micro-region for wheat in saline-alkali land provided by the present invention includes a straw interlayer, a fertile plough layer and a cultivation layer, which can realize salt inhibition in the rhizosphere micro-region of saline-alkali land, prevent salt return, and improve the plough layer structure and fertility of saline-alkali land. Practice shows that by using the method for constructing a rhizosphere suitable micro-region for wheat in saline-alkali land, the soil condition of saline-alkali land can be gradually improved and the wheat planting yield can be increased.

[0033] The present invention also provides a high-yield planting technology for wheat in saline-alkali land, which realizes the turnover of soil organic carbon through straw returning in wheat planting in saline-alkali land; constructs a fertile plough layer in saline-alkali land by adding different organic amendments to change soil organic matter, aggregate stability and microbial activity and their interactions; optimizes the physical structure of saline-alkali land soil through organic-inorganic composite regulation; and jointly realizes high-yield planting of wheat in saline-alkali land. Brief Description of the Drawings

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0035] Figure 1 It is a schematic diagram of a rhizosphere suitable micro-region for wheat in saline-alkali land provided by the present invention;

[0036] Figure 2 It is a schematic diagram of the soil structure of the rhizosphere micro-region provided by the present invention;

[0037] In the figure, 1 - rhizosphere suitable micro-region for wheat; 2 - straw interlayer; 3 - fertile plough layer; 4 - cultivation layer. Detailed Embodiments

[0038] The following will clearly and completely describe the technical solutions of the present invention in combination with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0039] The structure of the rhizosphere suitable micro-region 1 for wheat in saline-alkali land is as Figure 1 and 2As shown in the figure, it includes a straw layer 2, which is arranged underground in the saline-alkali soil layer, a cultivation layer 4 is arranged on the surface layer of the saline-alkali soil, and a fertile plough layer 3 is arranged between the straw layer 2 and the cultivation layer 4;

[0040] The straw layer 2 is mainly formed by laying straw;

[0041] Organic materials, water-based resin-coated compound fertilizers and conventional chemical fertilizers are added to the soil of the fertile plough layer 3, and deep ploughing is carried out;

[0042] The cultivation layer 4 is sprayed with salt-tolerant biological functional substances and is covered with plastic film.

[0043] The straw in the straw layer 2 can increase the soil organic carbon content, promote biological vitality and the development of wheat roots. At the same time, it can improve the soil structure and air permeability, block the accumulation of salts and the upward passage of salts with water, and inhibit the return of salts on the soil surface layer; adding organic materials, water-based resin-coated compound fertilizers and conventional chemical fertilizers to the fertile plough layer 3 can carry out biological decomposition, realize the stable and continuous release of soil nutrients, rapidly increase the organic matter, improve the soil fertility, realize fertile soil for rooting, and promote the growth and development of wheat; by deep burying, covering and deep ploughing in the fertile plough layer, the soil plough sole is broken, the soil structure is improved, the air permeability and water permeability of the soil are enhanced, and the organic matter mineralization rate is increased; spraying salt-tolerant biological functional substances and covering plastic film in the cultivation layer 4 for biological strengthening can realize biological root promotion and inhibit water evaporation and salt upward movement.

[0044] Through the specific design of the above-mentioned layers, the salt content of the saline-alkali soil is reduced and the return of salts is prevented. At the same time, the soil nutrients are slowly and continuously released, the soil structure is improved, the fertility is increased, and high-yield wheat planting is realized.

[0045] The following uses specific examples to illustrate it.

[0046] Example 1

[0047] A method for constructing the rhizosphere micro-region of wheat in saline-alkali land includes the following steps:

[0048] (1) Dig down the saline-alkali soil with a depth of 40 cm, place the dug saline-alkali soil on an open space beside, level the soil surface and lay straw. The laying thickness of the straw is 10 cm, and the length of the straw is 1.5 cm to form a straw layer;

[0049] (2) Uniformly spread organic materials, water-based resin-coated compound fertilizers, and conventional chemical fertilizers above the straw and level the surface. The application rate of organic materials is 30 t / ha. The organic materials include a composite of cow dung, earthworm manure, and furfural residue. The application rate of water-based resin-coated compound fertilizers (nutrient content N-P2O5-K2O: 15-14-6) is 75 kg / ha. The application rates of conventional chemical fertilizers are 15 kg / ha of urea, 8 kg / ha of ammonium sulfate, 21 kg / ha of superphosphate, and 118 kg / ha of potassium sulfate. Fill the dug-out saline-alkali soil back, deeply bury and cover the straw and fertilizers, and conduct deep plowing to a depth of 30 cm to form a fertile plough layer;

[0050] (3) Spray salt-tolerant biological functional substances on the surface layer of the saline-alkali land and cover it with plastic film. The application rate of salt-tolerant biological functional substances is 40 L / ha, and the dilution ratio is 1:500. The salt-tolerant biological functional substances include a composite of trace elements and amino acids. The spacing of the plastic film is 15 cm to form a cultivation layer.

[0051] The specific application is as follows:

[0052] Plant wheat in the cultivation layer. The wheat variety is Jimai 22. It is planted in October. The topdressing application rates during the greening stage in March of the following year are 30 kg / ha of biochar, 7 kg / ha of urea, 10 kg / ha of ammonium sulfate, 2 kg / ha of monoammonium phosphate, and 10 kg / ha of superphosphate; the topdressing application rates during the jointing stage in April are 120 kg / ha of biochar, 32 kg / ha of urea, 45 kg / ha of ammonium sulfate, 10 kg / ha of monoammonium phosphate, and 40 kg / ha of superphosphate; the topdressing application rate during the heading stage in May is 30 kg / ha of biochar, 25 kg / ha of urea, and 43 kg / ha of ammonium sulfate.

[0053] After implementing the construction of the wheat rhizosphere suitable micro-region in the saline-alkali land above, the wheat yield increased from 5431 kg / ha to 5961 kg / ha, with an increase of 9.8%. The soil salt content decreased from 1.42 g / kg to 1.07 g / kg, and the soil salt content decreased by 24.65%. The saline-alkali land has significant effects in salt reduction, effectively preventing salt return, and high-yield wheat cultivation, and the soil structure of the saline-alkali land has been effectively improved.

[0054] Example 2

[0055] A method for constructing a wheat rhizosphere micro-region in saline-alkali land, comprising the following steps:

[0056] (1) Dig down the saline-alkali land soil to a depth of 38 cm, place the dug-out saline-alkali soil on an open space beside, level the soil surface and lay straw. The laying thickness of the straw is 12 cm, and the length of the straw is 2 cm to form a straw interlayer;

[0057] (2) Uniformly spread organic materials, water-based resin-coated compound fertilizers, and conventional chemical fertilizers above the straw and level the surface. The application rate of organic materials is 35 t / ha. The organic materials include a composite of cow dung and furfural residues. The application rate of water-based resin-coated compound fertilizers (nutrient content N-P2O5-K2O: 15-14-6) is 73 kg / ha. The application rates of conventional chemical fertilizers are 16 kg / ha of urea, 9 kg / ha of ammonium sulfate, 26 kg / ha of superphosphate, and 123 kg / ha of potassium sulfate. Fill back the excavated saline-alkali soil, deeply bury and cover the straw and fertilizers, and conduct deep plowing to a depth of 26 cm to form a fertile plow layer;

[0058] (3) Spray salt-tolerant biological functional substances on the surface layer of the saline-alkali land and cover it with plastic film. The application rate of salt-tolerant biological functional substances is 35 L / ha, and the dilution ratio is 1:600. The salt-tolerant biological functional substances include a composite of trace elements and seaweed polypeptides. The spacing of the plastic film is 16 cm to form a cultivation layer;

[0059] Specific applications are as follows:

[0060] Plant wheat in the cultivation layer. The wheat variety is Jimai 22. It is planted in October. The topdressing amounts during the greening stage in March of the following year are 28 kg / ha of biochar, 9 kg / ha of urea, 13 kg / ha of ammonium sulfate, 3 kg / ha of monoammonium phosphate, and 12 kg / ha of superphosphate; the topdressing amounts during the jointing stage in April are 115 kg / ha of biochar, 27 kg / ha of urea, 50 kg / ha of ammonium sulfate, 12 kg / ha of monoammonium phosphate, and 42 kg / ha of superphosphate; the topdressing amount during the heading stage in May is 28 kg / ha of biochar, 30 kg / ha of urea, and 45 kg / ha of ammonium sulfate.

[0061] After implementing the above construction of the wheat rhizosphere suitable micro-region in saline-alkali land, the wheat yield increased from 5500 kg / ha to 5961 kg / ha, with an 8.4% increase in production. The soil salt content decreased from 1.43 g / kg to 1.11 g / kg, and the soil salt content decreased by 22.38%. The saline-alkali land has significant effects in preventing salt return, improving the soil structure of saline-alkali land, and high-yield wheat planting, and the salt in the saline-alkali land has been effectively reduced.

[0062] Example 3

[0063] A method for constructing a wheat rhizosphere micro-region in saline-alkali land, comprising the following steps:

[0064] (1) Dig down the saline-alkali soil to a depth of 35 cm, place the excavated saline-alkali soil on an open space beside, level the soil surface and lay straw. The laying thickness of the straw is 15 cm, and the length of the straw is 1 cm to form a straw isolation layer;

[0065] (2) Uniformly spread the organic materials, water-based resin-coated compound fertilizer, and conventional chemical fertilizers above the straw and level the surface. The application rate of the organic materials is 37 t / ha. The organic materials include a composite of cow dung and earthworm dung. The application rate of the water-based resin-coated compound fertilizer (nutrient content N-P2O5-K2O: 15-14-6) is 70 kg / ha. The application rates of the conventional chemical fertilizers are 17 kg / ha of urea, 10 kg / ha of ammonium sulfate, 31 kg / ha of superphosphate, and 128 kg / ha of potassium sulfate. Fill back the excavated saline-alkali soil, deeply bury and cover the straw and fertilizers, and conduct deep plowing to a depth of 20 cm to form a fertile plow layer;

[0066] (3) Spray the salt-tolerant biological functional substance on the surface layer of the saline-alkali land and cover it with plastic film. The application rate of the salt-tolerant biological functional substance is 50 L / ha, and the dilution ratio is 1:700. The salt-tolerant biological functional substance includes a composite of trace elements and trehalose. The spacing of the plastic film is 10 cm to form a cultivation layer;

[0067] The specific application is as follows:

[0068] Plant wheat in the cultivation layer. The wheat variety is Jimai 22. It is planted in October. The topdressing application rates during the greening stage in March of the following year are 35 kg / ha of biochar, 10 kg / ha of urea, 15 kg / ha of ammonium sulfate, 4 kg / ha of monoammonium phosphate, and 13 kg / ha of superphosphate; the topdressing application rates during the jointing stage in April are 125 kg / ha of biochar, 35 kg / ha of urea, 55 kg / ha of ammonium sulfate, 13 kg / ha of monoammonium phosphate, and 43 kg / ha of superphosphate; the topdressing application rate during the heading stage in May is 35 kg / ha of biochar, 35 kg / ha of urea, and 46 kg / ha of ammonium sulfate.

[0069] After implementing the construction of the wheat rhizosphere suitable micro-region in the saline-alkali land, the wheat yield increased from 5582 kg / ha to 6067 kg / ha, with an 8.7% increase in production. The soil salt content decreased from 1.43 g / kg to 1.14 g / kg, and the soil salt content decreased by 20.28%.

[0070] In summary, the advantages of the wheat rhizosphere micro-region structure constructed by the method for constructing the wheat rhizosphere micro-region in the saline-alkali land enable it to have wide adaptability to the wheat planting land in the saline-alkali land. It is simple to operate, low in cost, and highly available. It can effectively improve the soil condition of the saline-alkali land, promote the construction of the wheat rhizosphere suitable micro-region, increase the wheat planting yield in the saline-alkali land, and has good and broad application prospects in the wheat planting system in the saline-alkali land.

[0071] In the present specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method section.

[0072] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for constructing a rhizosphere microdomain suitable for wheat in saline-alkali land, characterized in that: The following steps are involved: (1) Dig deep into the saline-alkali soil, level the ground and lay straw to form a straw layer; (2) spreading organic materials, water-based resin coated compound fertilizer and chemical fertilizer on the surface of the straw interlayer, and then backfilling the excavated soil, and deep plowing and turning after backfilling to form a fertile arable layer; (3) Spray salt-tolerant biological functional substances on the surface of the fertile arable layer and cover it with a film to form a cultivation layer.

2. The method for constructing a rhizosphere adaptive micro-domain for wheat in saline-alkali land according to claim 1, characterized in that: The deep digging depth in step (1) is 35-40 cm, the straw laying thickness is 10-20 cm, the straw length is 1-2 cm, and the straw consumption is 5000-6000 kg / ha.

3. The method for constructing a saline-alkali land wheat rhizosphere adaptive micro-domain according to claim 1, characterized in that: The organic material in step (2) includes one or more of humic acid, furfural residue, earthworm castings, cow dung or biochar, and the application amount of the organic material is 30-40 t / ha.

4. The method for constructing a rhizosphere adaptive micro-domain for wheat in saline-alkali land according to claim 1, characterized in that: The nutrient content of the water-based resin coated compound fertilizer in step (2) is N-P2O5-K2O: 15-14-6, and the application amount of the water-based resin coated compound fertilizer is 70-75 kg / ha.

5. The method for constructing a saline-alkali land wheat rhizosphere adaptive micro-domain according to claim 1, characterized in that: The fertilizers and their application rates in step (2) include 15-17 kg / ha of urea, 8-10 kg / ha of ammonium sulfate, 21-31 kg / ha of superphosphate, and 118-128 kg / ha of potassium sulfate.

6. The method for constructing a saline-alkali land wheat rhizosphere adaptive micro-domain according to claim 1, characterized in that: The deep tillage and plowing depth in step (2) is 20-30 cm.

7. The method for constructing a rhizosphere adaptive micro-domain for wheat in saline-alkali land according to claim 1, characterized in that: The salt-tolerant biological functional substance in step (3) includes one or more of trace elements, seaweed polypeptides, polypeptide amino acids, seaweed polysaccharides or agricultural bacteriophages, with an amount of 30-50 L / ha, and is diluted with water at a ratio of 1:500-1:1000 when used.

8. The method for constructing a rhizosphere adaptive micro-domain for wheat in saline-alkali land according to claim 1, characterized in that: In step (3), the film is covered with ground film or liquid ground film, and the covering distance is 10-20cm.

9. An application of the method according to any one of claims 1 to 8 in high-yield wheat planting, characterized in that: During wheat planting, topdressing is performed at the greening stage, jointing stage, and heading stage. Specifically: During the wheat greening period, topdressing should be applied with 25-35kg / ha of carbon, 7-10kg / ha of urea, 10-15kg / ha of ammonium sulfate, 2-4kg / ha of monoammonium phosphate, and 10-13kg / ha of superphosphate; During the jointing stage of wheat, topdressing with carbon 115-125kg / ha, urea 32-35kg / ha, ammonium sulfate 45-55kg / ha, monoammonium phosphate 10-13kg / ha, superphosphate 40-43kg / ha; During the heading period of wheat, topdressing should be applied with 25-35kg / ha of carbon, 25-35kg / ha of urea, and 43-46kg / ha of ammonium sulfate.

10. The use according to claim 9, characterized in that: The carbon includes one or more of humic acid, furfural residue, earthworm castings, cow dung or biochar.

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