Special wheat fertilizer suitable for saline-alkali soil as well as preparation method and application of special wheat fertilizer

Abstract

The invention discloses a special wheat fertilizer suitable for saline-alkali soil as well as a preparation method and application thereof, and belongs to the technical field of fertilizers. Wherein the modifier is prepared from lauric acid, zeolite powder, propylparaben and polyaspartic acid salt, and the dosage ratio of the lauric acid to the zeolite powder to the propylparaben to the polyaspartic acid salt is (3 to 6) to (2 to 6) to (6 to 10) to (8 to 14); wherein the complex microbial inoculants are purchased from Guangdong Province Microbial Culture Collection Center and comprise cryptococcus and micrococcus luteus, the preservation number of the cryptococcus is GDMCC 2.205, and the preservation number of the micrococcus luteus is GDMCC NO: 61867. According to the invention, the modifier and the complex microbial inoculant are introduced into the traditional basic fertilizer, so that the fertilizer can effectively improve the quality of wheat and prevent and treat the infection of gaeumannomyces graminis.

Description

Technical Field

[0001] The invention belongs to the technical field of fertilizers, and in particular relates to a special fertilizer for wheat suitable for saline-alkali land, a preparation method and application thereof. Background Art

[0002] Saline-alkali land refers to land with a salt content that exceeds the maximum limit that the soil can bear. The soil in saline-alkali land has a high salt content, loose soil structure, and poor permeability, which affects the growth of crop roots, resulting in a decrease in crop yield and deterioration in quality. Wheat is an important food crop in my country and one of the main crops grown in saline-alkali land.

[0003] Special wheat fertilizers suitable for saline-alkali land can effectively reduce soil salt content, improve soil structure, and improve soil physical and chemical properties; they can provide the nutrients needed for wheat growth and meet the different nutrient needs of wheat; they have slow-release or controlled-release properties to avoid fertilizer loss and improve fertilizer utilization.

[0004] At present, there are mainly the following types of special fertilizers for wheat suitable for saline-alkali land:

[0005] Organic fertilizer: Organic fertilizer can improve soil structure, increase soil organic matter content, promote soil microbial activity, and thus reduce soil salt content.

[0006] Fertilizer: Fertilizer can provide nutrients needed for wheat growth, but it can easily increase the salt content of the soil. Therefore, when applying fertilizer in saline-alkali land, attention should be paid to controlling the amount and frequency of fertilizer application.

[0007] Slow-release fertilizer: Slow-release fertilizer can effectively control the release rate of fertilizer, avoid fertilizer loss and improve fertilizer utilization rate.

[0008] In recent years, with the progress of science and technology, the research and development of special fertilizers for wheat in saline-alkali land has made great progress. For example, fertilizers containing polyaspartate, alginic acid and other fertilizers that improve soil properties, as well as fertilizers containing slow-release technology, have been developed. These fertilizers have achieved good results in wheat cultivation in saline-alkali land.

[0009] The following are specific application technologies of wheat-specific fertilizers suitable for saline-alkali land:

[0010] Before applying fertilizer, soil improvement should be carried out to reduce the salt content of the soil. This can be done by deep plowing, irrigation, and application of organic fertilizers.

[0011] When applying fertilizer, attention should be paid to controlling the amount and frequency of fertilizer application. Generally speaking, the amount of fertilizer applied to wheat in saline-alkali land should be reduced by 20%-30% compared to that in normal soil.

[0012] Fertilization can be carried out by hole application, furrow application and other methods to reduce fertilizer loss.

[0013] Slow-release fertilizers can be used for fertilization to improve fertilizer utilization.

[0014] By scientifically applying special fertilizers for wheat suitable for saline-alkali land, the yield and quality of saline-alkali land wheat can be effectively improved, and the sustainable development of saline-alkali land agriculture can be promoted.

[0015] In addition, wheat take-all disease occurs in major wheat producing areas around the world and has become an important root disease in major wheat producing areas around the world. It is a soil-dwelling fungus that lives a saprophytic life on diseased residues in the soil. Under suitable conditions, the hyphae directly infect the host seeds and roots and cause the disease; on the other hand, the pathogen overwinters on diseased residues in the form of ascocarps and hyphae, and seeds also carry the wheat take-all pathogen, making prevention and control very difficult. Summary of the invention

[0016] 1. Problems to be solved

[0017] In view of the problems existing in the above-mentioned prior art, the present invention provides a special fertilizer for wheat suitable for saline-alkali land, and a preparation method and application thereof. The present invention introduces a modifier and a composite bacterial agent into the traditional basic fertilizer. The above-mentioned fertilizer can not only effectively improve the quality of wheat, but also prevent and control the infection of wheat take-all pathogen.

[0018] 2. Technical solution

[0019] To solve the above problems, the present invention adopts the following technical solutions.

[0020] A special fertilizer for wheat suitable for saline-alkali land, comprising the following raw materials in parts by weight:

[0021] Urea: 100-140 parts,

[0022] Potassium dihydrogen phosphate: 30-60 parts,

[0023] Modifier: 2-7 parts,

[0024] Composite bacterial agent: 0.5-1.5 parts;

[0025] The modifier comprises lauric acid, zeolite powder, Nepal gold propyl ester and polyaspartate, and the usage ratio of the lauric acid, the zeolite powder, the Nepal gold propyl ester and the polyaspartate is (3-6): (2-6): (6-10): (8-14);

[0026] The composite bacterial agent is purchased from Guangdong Microbial Culture Collection Center, and includes Cryptococcus and Micrococcus luteus. The collection number of Cryptococcus is GDMCC 2.205, and the collection number of Micrococcus luteus is GDMCC NO: 61867.

[0027] The special fertilizer for wheat suitable for saline-alkali land comprises the following raw materials in parts by weight:

[0028] Urea: 110-130 parts,

[0029] Potassium dihydrogen phosphate: 40-60 parts,

[0030] Modifier: 2-7 parts,

[0031] Composite bacterial agent: 0.5-1.5 parts;

[0032] The modifier comprises lauric acid, zeolite powder, Nepal gold propyl ester and polyaspartate, and the usage ratio of the lauric acid, the zeolite powder, the Nepal gold propyl ester and the polyaspartate is (3-6): (2-6): (6-10): (8-14);

[0033] The composite bacterial agent is purchased from Guangdong Microbial Culture Collection Center, and includes Cryptococcus and Micrococcus luteus. The collection number of Cryptococcus is GDMCC 2.205, and the collection number of Micrococcus luteus is GDMCC NO: 61867.

[0034] The special fertilizer for wheat suitable for saline-alkali land comprises the following raw materials in parts by weight:

[0035] Urea: 120 parts,

[0036] Potassium dihydrogen phosphate: 50 parts,

[0037] Modifier: 5 parts;

[0038] Composite bacterial agent: 0.8 parts;

[0039] The modifier comprises lauric acid, zeolite powder, Nepal gold propyl ester and polyaspartate, and the usage ratio of the lauric acid, the zeolite powder, the Nepal gold propyl ester and the polyaspartate is 4:5:8:11;

[0040] The composite bacterial agent is purchased from Guangdong Microbial Culture Collection Center, and includes Cryptococcus and Micrococcus luteus. The collection number of Cryptococcus is GDMCC 2.205, and the collection number of Micrococcus luteus is GDMCC NO: 61867.

[0041] The special fertilizer for wheat suitable for saline-alkali land has a particle size of urea of ​​0.85 mm to 1.2 mm.

[0042] The special fertilizer for wheat suitable for saline-alkali land has a particle size of zeolite powder of 150 meshes to 210 meshes.

[0043] A method for preparing a special fertilizer for wheat suitable for saline-alkali land, the steps comprising:

[0044] First, urea, potassium dihydrogen phosphate, modifier and composite bacterial agent are stirred and mixed, and finally transported to an extrusion granulator for extrusion granulation to form granules.

[0045] The preparation method of the special fertilizer for wheat suitable for saline-alkali land and the preparation method of the modifier are as follows:

[0046] Firstly, lauric acid, zeolite powder and Nepal gold propyl ester are mixed, then added into polyaspartate to prepare a suspension, then irradiated with X-rays, and finally dried and crushed.

[0047] The method for preparing the special fertilizer for wheat suitable for saline-alkali land is characterized in that the drying temperature is 40°C.

[0048] The preparation method of the special fertilizer for wheat suitable for saline-alkali land, the rotation speed of the stirring and mixing is 40r / min-80r / min.

[0049] The special fertilizer for wheat suitable for saline-alkali land is used in the prevention and treatment of wheat take-all disease.

[0050] 3. Beneficial effects

[0051] Compared with the prior art, the present invention has the following beneficial effects:

[0052] The test shows that compared with comparative examples 1-5, the average plant height of wheat in Examples 1-5 (ranging from 58.4cm to 60.2cm) is higher, the average root length of wheat (ranging from 16.2cm to 16.8cm) is higher, the average number of grains per plant of wheat (ranging from 40.2 to 42.5) is higher, and the average infection rate (ranging from 3.3% to 4.6%) is lower. It can be seen that the fertilizers prepared in Examples 1-5 can effectively improve the quality of wheat and prevent the infection of wheat take-all pathogen; among them, the fertilizer prepared in Example 5 has relatively large significant differences in various indicators. The present invention introduces modifiers and composite bacterial agents into traditional basic fertilizers, and the above fertilizers can not only effectively improve the quality of wheat, but also prevent the infection of wheat take-all pathogen. DETAILED DESCRIPTION

[0053] The present invention is further described below in conjunction with specific embodiments.

[0054] In the following examples, kg (kilogram) was selected instead of parts by weight during the experiments.

[0055] Example 1

[0056] The special fertilizer for wheat suitable for saline-alkali land comprises the following raw materials in parts by weight:

[0057] Urea: 100 parts,

[0058] Potassium dihydrogen phosphate: 60 parts,

[0059] Modifier: 2 parts,

[0060] Composite bacterial agent: 1.5 parts;

[0061] The modifier comprises lauric acid, zeolite powder, Nepal gold propyl ester and polyaspartate, and the usage ratio of the lauric acid, the zeolite powder, the Nepal gold propyl ester and the polyaspartate is 3:6:6:14;

[0062] The composite bacterial agent is purchased from Guangdong Microbial Culture Collection Center, and includes Cryptococcus and Micrococcus luteus. The collection number of Cryptococcus is GDMCC 2.205, and the collection number of Micrococcus luteus is GDMCC NO: 61867.

[0063] The special fertilizer for wheat suitable for saline-alkali land has a particle size of urea of ​​0.85 mm.

[0064] The special fertilizer for wheat suitable for saline-alkali land has a particle size of 210 meshes.

[0065] The preparation method of special fertilizer for wheat suitable for saline-alkali land comprises the following steps:

[0066] First, urea, potassium dihydrogen phosphate, modifier and composite bacterial agent are stirred and mixed, and finally transported to an extrusion granulator for extrusion granulation to form granules.

[0067] The preparation method of the special fertilizer for wheat suitable for saline-alkali land and the preparation method of the modifier are as follows:

[0068] Firstly, lauric acid, zeolite powder and Nepal gold propyl ester are mixed, then added into polyaspartate to prepare a suspension, then irradiated with X-rays, and finally dried and crushed.

[0069] The method for preparing the special fertilizer for wheat suitable for saline-alkali land is characterized in that the drying temperature is 40°C.

[0070] The method for preparing the special fertilizer for wheat suitable for saline-alkali land has a stirring and mixing speed of 40 r / min.

[0071] The special fertilizer for wheat suitable for saline-alkali land is used in the prevention and treatment of wheat take-all disease.

[0072] Example 2

[0073] The special fertilizer for wheat suitable for saline-alkali land comprises the following raw materials in parts by weight:

[0074] Urea: 140 parts,

[0075] Potassium dihydrogen phosphate: 30 parts,

[0076] Modifier: 7 parts,

[0077] Composite bacterial agent: 0.5 parts;

[0078] The modifier comprises lauric acid, zeolite powder, Nepal gold propyl ester and polyaspartate, and the usage ratio of the lauric acid, the zeolite powder, the Nepal gold propyl ester and the polyaspartate is 6:2:10:8;

[0079] The composite bacterial agent is purchased from Guangdong Microbial Culture Collection Center, and includes Cryptococcus and Micrococcus luteus. The collection number of Cryptococcus is GDMCC 2.205, and the collection number of Micrococcus luteus is GDMCC NO: 61867.

[0080] The special fertilizer for wheat suitable for saline-alkali land has a particle size of urea of ​​1.2 mm.

[0081] The special fertilizer for wheat suitable for saline-alkali land has a particle size of 150 meshes.

[0082] The preparation method of special fertilizer for wheat suitable for saline-alkali land comprises the following steps:

[0083] First, urea, potassium dihydrogen phosphate, modifier and composite bacterial agent are stirred and mixed, and finally transported to an extrusion granulator for extrusion granulation.

[0084] The preparation method of the special fertilizer for wheat suitable for saline-alkali land and the preparation method of the modifier are as follows:

[0085] Firstly, lauric acid, zeolite powder and Nepal gold propyl ester are mixed, then added into polyaspartate to prepare a suspension, then irradiated with X-rays, and finally dried and crushed.

[0086] The method for preparing the special fertilizer for wheat suitable for saline-alkali land is characterized in that the drying temperature is 40°C.

[0087] The method for preparing the special fertilizer for wheat suitable for saline-alkali land has a stirring and mixing speed of 80 r / min.

[0088] The special fertilizer for wheat suitable for saline-alkali land is used in the prevention and treatment of wheat take-all disease.

[0089] Example 3

[0090] The special fertilizer for wheat suitable for saline-alkali land comprises the following raw materials in parts by weight:

[0091] Urea: 110 parts,

[0092] Potassium dihydrogen phosphate: 60 parts,

[0093] Modifier: 2 parts,

[0094] Composite bacterial agent: 1.5 parts;

[0095] The modifier comprises lauric acid, zeolite powder, Nepal gold propyl ester and polyaspartate, and the usage ratio of the lauric acid, the zeolite powder, the Nepal gold propyl ester and the polyaspartate is 6:2:7:12;

[0096] The composite bacterial agent is purchased from Guangdong Microbial Culture Collection Center, and includes Cryptococcus and Micrococcus luteus. The collection number of Cryptococcus is GDMCC 2.205, and the collection number of Micrococcus luteus is GDMCC NO: 61867.

[0097] The special fertilizer for wheat suitable for saline-alkali land has a particle size of urea of ​​0.85 mm.

[0098] The special fertilizer for wheat suitable for saline-alkali land has a particle size of 150 meshes.

[0099] The preparation method of special fertilizer for wheat suitable for saline-alkali land comprises the following steps:

[0100] First, urea, potassium dihydrogen phosphate, modifier and composite bacterial agent are stirred and mixed, and finally transported to an extrusion granulator for extrusion granulation to form granules.

[0101] The preparation method of the special fertilizer for wheat suitable for saline-alkali land and the preparation method of the modifier are as follows:

[0102] Firstly, lauric acid, zeolite powder and Nepal gold propyl ester are mixed, then added into polyaspartate to prepare a suspension, then irradiated with X-rays, and finally dried and crushed.

[0103] The method for preparing the special fertilizer for wheat suitable for saline-alkali land is characterized in that the drying temperature is 40°C.

[0104] The method for preparing the special fertilizer for wheat suitable for saline-alkali land has a stirring and mixing speed of 40 r / min.

[0105] The special fertilizer for wheat suitable for saline-alkali land is used in the prevention and treatment of wheat take-all disease.

[0106] Example 4

[0107] The special fertilizer for wheat suitable for saline-alkali land comprises the following raw materials in parts by weight:

[0108] Urea: 130 parts,

[0109] Potassium dihydrogen phosphate: 40 parts,

[0110] Modifier: 7 parts,

[0111] Composite bacterial agent: 0.5 parts;

[0112] The modifier comprises lauric acid, zeolite powder, Nepal gold propyl ester and polyaspartate, and the usage ratio of the lauric acid, the zeolite powder, the Nepal gold propyl ester and the polyaspartate is 5:3:9:10;

[0113] The composite bacterial agent is purchased from Guangdong Microbial Culture Collection Center, and includes Cryptococcus and Micrococcus luteus. The collection number of Cryptococcus is GDMCC 2.205, and the collection number of Micrococcus luteus is GDMCC NO: 61867.

[0114] The special fertilizer for wheat suitable for saline-alkali land has a particle size of urea of ​​1.2 mm.

[0115] The special fertilizer for wheat suitable for saline-alkali land has a particle size of 210 meshes.

[0116] The preparation method of special fertilizer for wheat suitable for saline-alkali land comprises the following steps:

[0117] First, urea, potassium dihydrogen phosphate, modifier and composite bacterial agent are stirred and mixed, and finally transported to an extrusion granulator for extrusion granulation to form granules.

[0118] The preparation method of the special fertilizer for wheat suitable for saline-alkali land and the preparation method of the modifier are as follows:

[0119] Firstly, lauric acid, zeolite powder and Nepal gold propyl ester are mixed, then added into polyaspartate to prepare a suspension, then irradiated with X-rays, and finally dried and crushed.

[0120] The method for preparing the special fertilizer for wheat suitable for saline-alkali land is characterized in that the drying temperature is 40°C.

[0121] The method for preparing the special fertilizer for wheat suitable for saline-alkali land has a stirring and mixing speed of 80 r / min.

[0122] The special fertilizer for wheat suitable for saline-alkali land is used in the prevention and treatment of wheat take-all disease.

[0123] Example 5

[0124] The special fertilizer for wheat suitable for saline-alkali land comprises the following raw materials in parts by weight:

[0125] Urea: 120 parts,

[0126] Potassium dihydrogen phosphate: 50 parts,

[0127] Modifier: 5 parts,

[0128] Composite bacterial agent: 0.8 parts;

[0129] The modifier comprises lauric acid, zeolite powder, Nepal gold propyl ester and polyaspartate, and the usage ratio of the lauric acid, the zeolite powder, the Nepal gold propyl ester and the polyaspartate is 4:5:8:11;

[0130] The composite bacterial agent is purchased from Guangdong Microbial Culture Collection Center, and includes Cryptococcus and Micrococcus luteus. The collection number of Cryptococcus is GDMCC 2.205, and the collection number of Micrococcus luteus is GDMCC NO: 61867.

[0131] The special fertilizer for wheat suitable for saline-alkali land has a particle size of urea of ​​1.0 mm.

[0132] The special fertilizer for wheat suitable for saline-alkali land has a particle size of 180 meshes.

[0133] The preparation method of special fertilizer for wheat suitable for saline-alkali land comprises the following steps:

[0134] First, urea, potassium dihydrogen phosphate, modifier and composite bacterial agent are stirred and mixed, and finally transported to an extrusion granulator for extrusion granulation.

[0135] The preparation method of the special fertilizer for wheat suitable for saline-alkali land and the preparation method of the modifier are as follows:

[0136] Firstly, lauric acid, zeolite powder and Nepal gold propyl ester are mixed, then added into polyaspartate to prepare a suspension, then irradiated with X-rays, and finally dried and crushed.

[0137] The method for preparing the special fertilizer for wheat suitable for saline-alkali land is characterized in that the drying temperature is 40°C.

[0138] The method for preparing the special fertilizer for wheat suitable for saline-alkali land has a stirring and mixing speed of 60 r / min.

[0139] The special fertilizer for wheat suitable for saline-alkali land is used in the prevention and treatment of wheat take-all disease.

[0140] Comparative Example 1

[0141] The special fertilizer for wheat suitable for saline-alkali land comprises the following raw materials in parts by weight:

[0142] Urea: 120 parts,

[0143] Potassium dihydrogen phosphate: 50 parts,

[0144] Modifier: 5 parts,

[0145] Composite bacterial agent: 0.8 parts;

[0146] The modifier comprises zeolite powder, Nepal gold propyl ester and polyaspartate, and the usage ratio of the zeolite powder, the Nepal gold propyl ester and the polyaspartate is 5:8:11;

[0147] The composite bacterial agent is purchased from Guangdong Microbial Culture Collection Center, and includes Cryptococcus and Micrococcus luteus. The collection number of Cryptococcus is GDMCC 2.205, and the collection number of Micrococcus luteus is GDMCC NO: 61867.

[0148] The special fertilizer for wheat suitable for saline-alkali land has a particle size of urea of ​​1.0 mm.

[0149] The special fertilizer for wheat suitable for saline-alkali land has a particle size of 180 meshes.

[0150] The preparation method of special fertilizer for wheat suitable for saline-alkali land comprises the following steps:

[0151] First, urea, potassium dihydrogen phosphate, modifier and composite bacterial agent are stirred and mixed, and finally transported to an extrusion granulator for extrusion granulation.

[0152] The preparation method of the special fertilizer for wheat suitable for saline-alkali land and the preparation method of the modifier are as follows:

[0153] The zeolite powder and Nepal gold propyl ester are first mixed, then added into polyaspartate to prepare a suspension, then irradiated with X-rays, and finally dried and crushed.

[0154] The method for preparing the special fertilizer for wheat suitable for saline-alkali land is characterized in that the drying temperature is 40°C.

[0155] The method for preparing the special fertilizer for wheat suitable for saline-alkali land has a stirring and mixing speed of 60 r / min.

[0156] The special fertilizer for wheat suitable for saline-alkali land is used in the prevention and treatment of wheat take-all disease.

[0157] Comparative Example 2

[0158] The special fertilizer for wheat suitable for saline-alkali land comprises the following raw materials in parts by weight:

[0159] Urea: 120 parts,

[0160] Potassium dihydrogen phosphate: 50 parts,

[0161] Modifier: 5 parts,

[0162] Composite bacterial agent: 0.8 parts;

[0163] The modifier comprises lauric acid, zeolite powder and polyaspartate, and the usage ratio of the lauric acid, the zeolite powder and the polyaspartate is 4:5:11;

[0164] The composite bacterial agent is purchased from Guangdong Microbial Culture Collection Center, and includes Cryptococcus and Micrococcus luteus. The collection number of Cryptococcus is GDMCC 2.205, and the collection number of Micrococcus luteus is GDMCC NO: 61867.

[0165] The special fertilizer for wheat suitable for saline-alkali land has a particle size of urea of ​​1.0 mm.

[0166] The special fertilizer for wheat suitable for saline-alkali land has a particle size of 180 meshes.

[0167] The preparation method of special fertilizer for wheat suitable for saline-alkali land comprises the following steps:

[0168] First, urea, potassium dihydrogen phosphate, modifier and composite bacterial agent are stirred and mixed, and finally transported to an extrusion granulator for extrusion granulation.

[0169] The preparation method of the special fertilizer for wheat suitable for saline-alkali land and the preparation method of the modifier are as follows:

[0170] First, lauric acid and zeolite powder are mixed, then added into polyaspartate to prepare a suspension, then irradiated with X-rays, and finally dried and crushed.

[0171] The method for preparing the special fertilizer for wheat suitable for saline-alkali land is characterized in that the drying temperature is 40°C.

[0172] The method for preparing the special fertilizer for wheat suitable for saline-alkali land has a stirring and mixing speed of 60 r / min.

[0173] The special fertilizer for wheat suitable for saline-alkali land is used in the prevention and treatment of wheat take-all disease.

[0174] Comparative Example 3

[0175] The special fertilizer for wheat suitable for saline-alkali land comprises the following raw materials in parts by weight:

[0176] Urea: 120 parts,

[0177] Potassium dihydrogen phosphate: 50 parts,

[0178] Compound bacterial agent: 0.8 parts,

[0179] The composite bacterial agent is purchased from Guangdong Microbial Culture Collection Center, and includes Cryptococcus and Micrococcus luteus. The collection number of Cryptococcus is GDMCC 2.205, and the collection number of Micrococcus luteus is GDMCC NO: 61867.

[0180] The special fertilizer for wheat suitable for saline-alkali land has a particle size of urea of ​​1.0 mm.

[0181] The special fertilizer for wheat suitable for saline-alkali land has a particle size of 180 meshes.

[0182] The preparation method of special fertilizer for wheat suitable for saline-alkali land comprises the following steps:

[0183] First, urea, potassium dihydrogen phosphate and the composite bacterial agent are stirred and mixed, and finally conveyed to an extrusion granulator for extrusion granulation.

[0184] The method for preparing the special fertilizer for wheat suitable for saline-alkali land is characterized in that the drying temperature is 40°C.

[0185] The method for preparing the special fertilizer for wheat suitable for saline-alkali land has a stirring and mixing speed of 60 r / min.

[0186] The special fertilizer for wheat suitable for saline-alkali land is used in the prevention and treatment of wheat take-all disease.

[0187] Comparative Example 4

[0188] The special fertilizer for wheat suitable for saline-alkali land comprises the following raw materials in parts by weight:

[0189] Urea: 120 parts,

[0190] Potassium dihydrogen phosphate: 50 parts,

[0191] Modifier: 5 parts,

[0192] Bacterial agent: 0.8 parts;

[0193] The modifier comprises lauric acid, zeolite powder, Nepal gold propyl ester and polyaspartate, and the usage ratio of the lauric acid, the zeolite powder, the Nepal gold propyl ester and the polyaspartate is 4:5:8:11;

[0194] The bacterial agent is purchased from Guangdong Microbial Culture Collection Center, which includes Cryptococcus, and the collection number of Cryptococcus is GDMCC 2.205.

[0195] The special fertilizer for wheat suitable for saline-alkali land has a particle size of urea of ​​1.0 mm.

[0196] The special fertilizer for wheat suitable for saline-alkali land has a particle size of 180 meshes.

[0197] The preparation method of special fertilizer for wheat suitable for saline-alkali land comprises the following steps:

[0198] First, urea, potassium dihydrogen phosphate, modifier and bacterial agent are stirred and mixed, and finally transported to an extrusion granulator for extrusion granulation.

[0199] The preparation method of the special fertilizer for wheat suitable for saline-alkali land and the preparation method of the modifier are as follows:

[0200] Firstly, lauric acid, zeolite powder and Nepal gold propyl ester are mixed, then added into polyaspartate to prepare a suspension, then irradiated with X-rays, and finally dried and crushed.

[0201] The method for preparing the special fertilizer for wheat suitable for saline-alkali land is characterized in that the drying temperature is 40°C.

[0202] The method for preparing the special fertilizer for wheat suitable for saline-alkali land has a stirring and mixing speed of 60 r / min.

[0203] The special fertilizer for wheat suitable for saline-alkali land is used in the prevention and treatment of wheat take-all disease.

[0204] Comparative Example 5

[0205] The special fertilizer for wheat suitable for saline-alkali land comprises the following raw materials in parts by weight:

[0206] Urea: 120 parts,

[0207] Potassium dihydrogen phosphate: 50 parts,

[0208] Modifier: 5 parts,

[0209] Bacterial agent: 0.8 parts;

[0210] The modifier comprises lauric acid, zeolite powder, Nepal gold propyl ester and polyaspartate, and the usage ratio of the lauric acid, the zeolite powder, the Nepal gold propyl ester and the polyaspartate is 4:5:8:11;

[0211] The bacterial agent is purchased from Guangdong Microbial Culture Collection Center, which includes Micrococcus luteus. The collection number of Micrococcus luteus is GDMCC NO: 61867.

[0212] The special fertilizer for wheat suitable for saline-alkali land has a particle size of urea of ​​1.0 mm.

[0213] The special fertilizer for wheat suitable for saline-alkali land has a particle size of 180 meshes.

[0214] The preparation method of special fertilizer for wheat suitable for saline-alkali land comprises the following steps:

[0215] First, urea, potassium dihydrogen phosphate, modifier and bacterial agent are stirred and mixed, and finally transported to an extrusion granulator for extrusion granulation.

[0216] The preparation method of the special fertilizer for wheat suitable for saline-alkali land and the preparation method of the modifier are as follows:

[0217] Firstly, lauric acid, zeolite powder and Nepal gold propyl ester are mixed, then added into polyaspartate to prepare a suspension, then irradiated with X-rays, and finally dried and crushed.

[0218] The method for preparing the special fertilizer for wheat suitable for saline-alkali land is characterized in that the drying temperature is 40°C.

[0219] The method for preparing the special fertilizer for wheat suitable for saline-alkali land has a stirring and mixing speed of 60 r / min.

[0220] The special fertilizer for wheat suitable for saline-alkali land is used in the prevention and treatment of wheat take-all disease.

[0221] Example 6

[0222] Specific application of fertilizers in Examples 1-5 and Comparative Examples 1-5:

[0223] We investigated the performance indicators of different wheat fertilizers suitable for saline-alkali land, and the results are as follows (as shown in Table 1):

[0224] The specific test method is as follows: a wheat saline-alkali test site in Xiao County, Suzhou City, Anhui Province (with a total salt content of 1.8%) was selected, and the above-mentioned fertilizer was applied after healthy wheat (in the seedling stage, the wheat seeds were from Hefei Fengle Seed Wheat Seed Company, variety "An Ke 157") was transplanted. At the same time, an infection test of the pathogen of wheat take-all disease (Gramineus gramineus variant) was carried out, and then the quality and infection status of the wheat were statistically analyzed during the wheat maturity period.

[0225] Table 1

[0226]

[0227] The test shows (combined with Table 1), compared with Comparative Examples 1-5, the average plant height of wheat in Examples 1-5 (ranging from 58.4 cm to 60.2 cm) is higher, the average root length of wheat (ranging from 16.2 cm to 16.8 cm) is higher, the average number of grains per plant of wheat (ranging from 40.2 to 42.5) is higher, and the average infection rate (ranging from 3.3% to 4.6%) is lower. It can be seen that the fertilizers prepared in Examples 1-5 can effectively improve the quality of wheat and prevent the infection of wheat take-all pathogen; among them, the fertilizer prepared in Example 5 has relatively large significant differences in various indicators.

[0228] In summary, the present invention introduces a modifier and a composite bacterial agent into the traditional basic fertilizer. The above fertilizer can not only effectively improve the quality of wheat, but also prevent and control the infection of wheat take-all pathogen.

[0229] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as belonging to the scope of protection determined by the claims submitted for the present invention.

Claims

1. A special fertilizer for wheat suitable for saline-alkali land, characterized in that: In parts by weight, the following raw materials are included: Urea: 100-140 parts, Potassium dihydrogen phosphate: 30-60 parts, Modifier: 2-7 parts, Composite bacterial agent: 0.5-1.5 parts; The modifier comprises lauric acid, zeolite powder, Nepal gold propyl ester and polyaspartate, and the usage ratio of the lauric acid, the zeolite powder, the Nepal gold propyl ester and the polyaspartate is (3-6): (2-6): (6-10): (8-14); The composite bacterial agent is purchased from Guangdong Microbial Culture Collection Center, and includes Cryptococcus and Micrococcus luteus. The collection number of Cryptococcus is GDMCC 2.205, and the collection number of Micrococcus luteus is GDMCC NO: 61867.

2. The special fertilizer for wheat suitable for saline-alkali land according to claim 1, characterized in that: In parts by weight, the following raw materials are included: Urea: 110-130 parts, Potassium dihydrogen phosphate: 40-60 parts, Modifier: 2-7 parts, Composite bacterial agent: 0.5-1.5 parts; The modifier comprises lauric acid, zeolite powder, Nepal gold propyl ester and polyaspartate, and the usage ratio of the lauric acid, the zeolite powder, the Nepal gold propyl ester and the polyaspartate is (3-6): (2-6): (6-10): (8-14); The composite bacterial agent is purchased from Guangdong Microbial Culture Collection Center, and includes Cryptococcus and Micrococcus luteus. The collection number of Cryptococcus is GDMCC 2.205, and the collection number of Micrococcus luteus is GDMCC NO: 61867.

3. The special fertilizer for wheat suitable for saline-alkali land according to claim 2, characterized in that: In parts by weight, the following raw materials are included: Urea: 120 parts, Potassium dihydrogen phosphate: 50 parts, Modifier: 5 parts, Composite bacterial agent: 0.8 parts; The modifier comprises lauric acid, zeolite powder, Nepal gold propyl ester and polyaspartate, and the usage ratio of the lauric acid, the zeolite powder, the Nepal gold propyl ester and the polyaspartate is 4:5:8:11; The composite bacterial agent is purchased from Guangdong Microbial Culture Collection Center, and includes Cryptococcus and Micrococcus luteus. The collection number of Cryptococcus is GDMCC 2.205, and the collection number of Micrococcus luteus is GDMCC NO: 61867.

4. The special fertilizer for wheat suitable for saline-alkali land according to any one of claims 1 to 3, characterized in that: The particle size of the urea is 0.85mm-1.2mm.

5. The special fertilizer for wheat suitable for saline-alkali land according to any one of claims 1 to 3, characterized in that: The particle size of the zeolite powder is 150 meshes to 210 meshes.

6. A method for preparing a special fertilizer for wheat suitable for saline-alkali land, the steps comprising: Firstly, urea, potassium dihydrogen phosphate, modifier and composite bacterial agent are stirred and mixed, and finally transported to an extrusion granulator for extrusion granulation to form granules.

7. The method for preparing the special fertilizer for wheat suitable for saline-alkali land according to claim 6, characterized in that: The preparation method of the modifier is as follows: Firstly, lauric acid, zeolite powder and Nepal gold propyl ester are mixed, then added into polyaspartate to prepare a suspension, then irradiated with X-rays, and finally dried and crushed.

8. The method for preparing the special fertilizer for wheat suitable for saline-alkali land according to claim 7, characterized in that: The drying temperature is 40°C.

9. The method for preparing the special fertilizer for wheat suitable for saline-alkali land according to claim 6, characterized in that: The stirring and mixing speed is 40r / min-80r / min.

10. Use of the special fertilizer for wheat suitable for saline-alkali land as claimed in claim 1 in the prevention and treatment of wheat take-all disease.

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