Special fertilizer for corn suitable for saline-alkali soil, preparation method therefor, and use thereof

Abstract

A special fertilizer for corn suitable for saline-alkali soil, a preparation method therefor, and a use thereof, belonging to the technical field of fertilizers. The special fertilizer comprises a modifier and a compound microbial agent. The modifier comprises veratramine, zeolite powder, biochar, and humic acid, and the dosage ratio of the veratramine, the zeolite powder, the biochar, and the humic acid is (3-6):(3-5):(1-2):(5-8). The compound microbial agent comprises Cryptococcus and Trichothecium roseum, the preservation number of the Cryptococcus is GDMCC 2.205, and the preservation number of the Trichothecium roseum is GIM 3.500. The introduction of the modifier and the compound microbial agent into a traditional base fertilizer enables said fertilizer to effectively improve the quality of corn, and also prevent and control the infection of corn by Bipolaris maydis.

Description

A special fertilizer for corn suitable for saline-alkali land, and its preparation method and application Technical Field

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

[0002] Saline-alkali soil refers to land with high levels of salt and alkaline substances in the soil. Crop cultivation on saline-alkali soil often requires measures to improve the soil environment and enhance the crops' salt-alkali tolerance, as these substances negatively impact plant growth and development. Corn (Zea mays) is a major food crop worldwide and has high soil requirements. However, conventional corn fertilizers may not meet the unique needs of corn grown on saline-alkali soil. Therefore, developing specialized corn fertilizers suitable for saline-alkali soil has become a research hotspot in the agricultural sector.

[0003] Special fertilizers for corn suitable for saline-alkali land should have the following characteristics:

[0004] Salt-alkali adaptability: Corn-specific fertilizers should have good salt-alkali adaptability and be able to stably release nutrients in a high salt-alkali environment to avoid nutrient loss due to excessive dissolution or reaction.

[0005] Adjusting soil pH: Saline-alkali land is usually accompanied by excessively alkaline soil. Corn-specific fertilizers can contain acidic substances or ingredients that can adjust soil pH to improve the pH value of the soil and provide a suitable growth environment.

[0006] Promote root growth: Corn-specific fertilizers should be rich in organic matter, trace elements, growth regulators and other ingredients, which are conducive to enhancing the development and expansion of corn roots and improving the plant's resistance to saline-alkali stress.

[0007] Balanced nutrient supply: Corn-specific fertilizers need to provide appropriate nitrogen, phosphorus, potassium and other major nutrients, as well as appropriate amounts of trace elements according to the nutrient requirements of corn at different growth stages to ensure normal growth and yield of corn.

[0008] Environmental friendliness: Corn-specific fertilizers should be environmentally friendly, reduce pollution to soil and water bodies, and reduce adverse impacts on the ecological environment.

[0009] Developing specialized corn fertilizers suitable for saline-alkali soils is a comprehensive undertaking, requiring comprehensive consideration of factors such as soil properties, corn variety characteristics, and climatic conditions, combined with scientific formulation and preparation techniques. Such specialized fertilizers are expected to provide a viable solution for corn cultivation on saline-alkali soils, improving corn yield and quality and promoting sustainable agricultural development.

[0010] However, the pathogen of corn leaf blight is Bipolaris maydis (Nisikado et Miyake) Shoem, a member of the subdivision Deuteromycotina. Corn leaf blight is a major disease in my country's corn-producing regions, widespread and severe in the warm and humid areas of the Yellow River and Yangtze River basins. In the summer corn-producing areas of Huaibei, Anhui Province, corn leaf blight is a serious problem, typically causing yield losses of 15%-20%, with severe losses exceeding 50%, or even total crop failure. Summary of the Invention 1. Problems to be solved

[0011] In response to the problems existing in the above-mentioned prior art, the present invention provides a special fertilizer for corn suitable for saline-alkali land, 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 corn, but also prevent and control the infection of corn leaf blight fungus. 2. Technical solution

[0012] To solve the above problems, the present invention adopts the following technical solutions.

[0013] A special fertilizer for corn suitable for saline-alkali land, comprising the following raw materials in parts by weight:

[0014] Urea: 80-120 parts,

[0015] Pyrophosphate: 1-10 parts,

[0016] Potassium dihydrogen phosphate: 40-50 parts,

[0017] Cow dung: 30-60 parts,

[0018] Modifier: 2-7 parts;

[0019] Composite bacterial agent: 0.5-1.5 parts;

[0020] Trace elements: 0.5-2.0 parts;

[0021] The modifier comprises veratridine, zeolite powder, biochar and humic acid, and the usage ratio of the veratridine, the zeolite powder, the biochar and the humic acid is (3-6): (3-5): (1-2): (5-8);

[0022] The composite bacterial agent is purchased from the Guangdong Provincial Microbial Culture Collection Center, and includes Cryptococcus and Pink Trichothecene. The preservation number of the Cryptococcus is GDMCC 2.205, and the preservation number of the Pink Trichothecene is GIM 3.500.

[0023] The special fertilizer for corn suitable for saline-alkali land comprises the following raw materials in parts by weight:

[0024] Urea: 90-110 parts,

[0025] Pyrophosphate: 3-7 parts,

[0026] Potassium dihydrogen phosphate: 42-48 parts

[0027] Cow dung: 40-50 parts,

[0028] Modifier: 2-7 parts;

[0029] Composite bacterial agent: 0.5-1.5 parts;

[0030] Trace elements: 0.5-2.0 parts;

[0031] The modifier comprises veratridine, zeolite powder, biochar and humic acid, and the usage ratio of the veratridine, the zeolite powder, the biochar and the humic acid is (3-6): (3-5): (1-2): (5-8);

[0032] The composite bacterial agent is purchased from the Guangdong Provincial Microbial Culture Collection Center, and includes Cryptococcus and Pink Trichothecene. The preservation number of the Cryptococcus is GDMCC 2.205, and the preservation number of the Pink Trichothecene is GIM 3.500.

[0033] The special fertilizer for corn suitable for saline-alkali land comprises the following raw materials in parts by weight:

[0034] Urea: 100 parts,

[0035] Pyrophosphate: 5 parts,

[0036] Potassium dihydrogen phosphate: 45 parts,

[0037] Cow dung: 45 parts,

[0038] Modifier: 5 parts;

[0039] Compound bacterial agent: 1 part;

[0040] Trace elements: 1.5 parts;

[0041] The modifier comprises veratridine, zeolite powder, biochar and humic acid, and the usage ratio of the veratridine, the zeolite powder, the biochar and the humic acid is 5:4:2:6;

[0042] The composite bacterial agent is purchased from the Guangdong Provincial Microbial Culture Collection Center, and includes Cryptococcus and Pink Trichothecene. The preservation number of the Cryptococcus is GDMCC 2.205, and the preservation number of the Pink Trichothecene is GIM 3.500.

[0043] The corn fertilizer suitable for saline-alkali soil comprises urea having a total nitrogen (N) content of ≥46.0% and a biuret mass fraction of ≤0.9%. The zeolite powder has a particle size range of 0.3 mm to 0.5 mm. The pyrophosphate is a combination of one or two of manganese pyrophosphate, potassium pyrophosphate, and calcium pyrophosphate. The trace elements are chelated zinc and magnesium salts, primarily amino acid chelated zinc and magnesium malate.

[0044] A method for preparing a special fertilizer for corn suitable for saline-alkali land comprises the following steps:

[0045] Urea, pyrophosphate, potassium dihydrogen phosphate, cow dung, modifier, compound bacterial agent, and trace elements are crushed by a mobile crusher, stirred and mixed by a stirring grinder, and finally transported to an extrusion granulator for extrusion granulation, and then dried and polished.

[0046] The preparation method of the special fertilizer for corn suitable for saline-alkali land and the preparation method of the modifier are as follows:

[0047] Veratridine, zeolite powder and biochar are first mixed, then added into humic acid to form a suspension, which is then irradiated with X-rays and finally dried and crushed.

[0048] The preparation method of the special fertilizer for corn suitable for saline-alkali land is characterized in that the drying temperature is 40° C. to maintain the activity of the composite bacterial agent.

[0049] The preparation method of the special fertilizer for corn suitable for saline-alkali land comprises the following steps: the stirring and mixing is performed at a rotation speed of 60 r / min, and the stirring is performed for 3-4 hours.

[0050] The special fertilizer for corn suitable for saline-alkali land is used in the prevention and treatment of corn leaf spot. 3. Beneficial effects

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

[0052] The test showed that compared with the comparative examples 1-5, the average corn yield in the examples 1-5 (ranging from 15697 kg / hm2) was 2 -16235kg / hm 2) is higher, the average starch content of corn kernels is higher (ranging from 79.3mg to 81.5mg), the average protein content of corn kernels is higher (ranging from 11.7% to 12.9%), and the average infection rate is lower (ranging from 5.5% to 6.3%). It can be seen that the fertilizers prepared in Examples 1-5 can effectively improve the quality of corn and prevent and control the infection of corn leaf blight fungus; among them, the fertilizer prepared in Example 5 has relatively large significant differences in various indicators. In summary, the present invention introduces a modifier and a composite bacterial agent into traditional basic fertilizers. The above fertilizers can not only effectively improve the quality of corn, but also prevent and control the infection of corn leaf blight fungus. DETAILED DESCRIPTION

[0053] The present invention will be further described below with reference to specific embodiments.

[0054] In the following examples, kg (kilogram) was used instead of parts by weight during the experiments. Example 1

[0055] A special fertilizer for corn suitable for saline-alkali land comprises the following raw materials in parts by weight:

[0056] Urea: 80 parts,

[0057] Pyrophosphate: 1 part,

[0058] Potassium dihydrogen phosphate: 40 parts,

[0059] Cow dung: 60 parts,

[0060] Modifier: 2 parts;

[0061] Composite bacterial agent: 1.5 parts;

[0062] Trace elements: 0.5 parts;

[0063] The modifier comprises veratridine, zeolite powder, biochar and humic acid, and the usage ratio of the veratridine, the zeolite powder, the biochar and the humic acid is 3:5:1:8;

[0064] The composite bacterial agent is purchased from the Guangdong Provincial Microbial Culture Collection Center, and includes Cryptococcus and Pink Trichothecene. The preservation number of the Cryptococcus is GDMCC 2.205, and the preservation number of the Pink Trichothecene is GIM 3.500.

[0065] The special fertilizer for corn suitable for saline-alkali land has a total nitrogen (N) content of urea of ​​≥46.0% and a biuret mass fraction of ≤0.9%; and the particle size of the zeolite powder ranges from 0.3 mm to 0.5 mm.

[0066] The special fertilizer for corn suitable for saline-alkali land comprises the following: the pyrophosphate is a compound preparation of one or two of manganese pyrophosphate, potassium pyrophosphate and calcium pyrophosphate; the trace elements are chelated zinc salts and magnesium salts, mainly amino acid chelated zinc and magnesium malate.

[0067] The preparation method of a special fertilizer for corn suitable for saline-alkali land comprises the following steps:

[0068] Urea, pyrophosphate, potassium dihydrogen phosphate, cow dung, modifier, compound bacterial agent, and trace elements are crushed by a mobile crusher, stirred and mixed by a stirring grinder, and finally transported to an extrusion granulator for extrusion granulation, and then dried and polished.

[0069] The preparation method of the special fertilizer for corn suitable for saline-alkali land and the preparation method of the modifier are as follows:

[0070] Veratridine, zeolite powder and biochar are first mixed, then added into humic acid to form a suspension, which is then irradiated with X-rays and finally dried and crushed.

[0071] The preparation method of the special fertilizer for corn suitable for saline-alkali land is characterized in that the drying temperature is 40° C. to maintain the activity of the composite bacterial agent.

[0072] The preparation method of the special fertilizer for corn suitable for saline-alkali land comprises the following steps: the stirring and mixing is performed at a rotation speed of 60 r / min, and the stirring is performed for 3-4 hours.

[0073] The special fertilizer for corn suitable for saline-alkali land is used in the prevention and treatment of corn leaf spot. Example 2

[0074] A special fertilizer for corn suitable for saline-alkali land comprises the following raw materials in parts by weight:

[0075] Urea: 120 parts,

[0076] Pyrophosphate: 10 parts,

[0077] Potassium dihydrogen phosphate: 50 parts,

[0078] Cow dung: 30 parts,

[0079] Modifier: 7 parts;

[0080] Composite bacterial agent: 0.5 parts;

[0081] Trace elements: 2.0 parts;

[0082] The modifier comprises veratridine, zeolite powder, biochar and humic acid, and the usage ratio of the veratridine, the zeolite powder, the biochar and the humic acid is 6:3:2:5;

[0083] The composite bacterial agent is purchased from the Guangdong Provincial Microbial Culture Collection Center, and includes Cryptococcus and Pink Trichothecene. The preservation number of the Cryptococcus is GDMCC 2.205, and the preservation number of the Pink Trichothecene is GIM 3.500.

[0084] The special fertilizer for corn suitable for saline-alkali land has a total nitrogen (N) content of urea of ​​≥46.0% and a biuret mass fraction of ≤0.9%; and the particle size of the zeolite powder ranges from 0.3 mm to 0.5 mm.

[0085] The special fertilizer for corn suitable for saline-alkali land comprises the following: the pyrophosphate is a compound preparation of one or two of manganese pyrophosphate, potassium pyrophosphate and calcium pyrophosphate; the trace elements are chelated zinc salts and magnesium salts, mainly amino acid chelated zinc and magnesium malate.

[0086] The preparation method of a special fertilizer for corn suitable for saline-alkali land comprises the following steps:

[0087] Urea, pyrophosphate, potassium dihydrogen phosphate, cow dung, modifier, compound bacterial agent, and trace elements are crushed by a mobile crusher, stirred and mixed by a stirring grinder, and finally transported to an extrusion granulator for extrusion granulation, and then dried and polished.

[0088] The preparation method of the special fertilizer for corn suitable for saline-alkali land and the preparation method of the modifier are as follows:

[0089] Veratridine, zeolite powder and biochar are first mixed, then added into humic acid to form a suspension, which is then irradiated with X-rays and finally dried and crushed.

[0090] The preparation method of the special fertilizer for corn suitable for saline-alkali land is characterized in that the drying temperature is 40° C. to maintain the activity of the composite bacterial agent.

[0091] The preparation method of the special fertilizer for corn suitable for saline-alkali land comprises the following steps: the stirring and mixing is performed at a rotation speed of 60 r / min, and the stirring is performed for 3-4 hours.

[0092] The special fertilizer for corn suitable for saline-alkali land is used in the prevention and treatment of corn leaf spot. Example 3

[0093] A special fertilizer for corn suitable for saline-alkali land comprises the following raw materials in parts by weight:

[0094] Urea: 90 parts,

[0095] Pyrophosphate: 3 parts

[0096] Potassium dihydrogen phosphate: 42 parts

[0097] Cow dung: 50 parts,

[0098] Modifier: 2 parts;

[0099] Composite bacterial agent: 1.5 parts;

[0100] Trace elements: 0.5 parts;

[0101] The modifier comprises veratridine, zeolite powder, biochar and humic acid, and the usage ratio of the veratridine, the zeolite powder, the biochar and the humic acid is 3:5:1:8;

[0102] The composite bacterial agent is purchased from the Guangdong Provincial Microbial Culture Collection Center, and includes Cryptococcus and Pink Trichothecene. The preservation number of the Cryptococcus is GDMCC 2.205, and the preservation number of the Pink Trichothecene is GIM 3.500.

[0103] The special fertilizer for corn suitable for saline-alkali land has a total nitrogen (N) content of urea of ​​≥46.0% and a biuret mass fraction of ≤0.9%; and the particle size of the zeolite powder ranges from 0.3 mm to 0.5 mm.

[0104] The special fertilizer for corn suitable for saline-alkali land comprises the following: the pyrophosphate is a compound preparation of one or two of manganese pyrophosphate, potassium pyrophosphate and calcium pyrophosphate; the trace elements are chelated zinc salts and magnesium salts, mainly amino acid chelated zinc and magnesium malate.

[0105] The preparation method of a special fertilizer for corn suitable for saline-alkali land comprises the following steps:

[0106] Urea, pyrophosphate, potassium dihydrogen phosphate, cow dung, modifier, compound bacterial agent, and trace elements are crushed by a mobile crusher, stirred and mixed by a stirring grinder, and finally transported to an extrusion granulator for extrusion granulation, and then dried and polished.

[0107] The preparation method of the special fertilizer for corn suitable for saline-alkali land and the preparation method of the modifier are as follows:

[0108] Veratridine, zeolite powder and biochar are first mixed, then added into humic acid to form a suspension, which is then irradiated with X-rays and finally dried and crushed.

[0109] The preparation method of the special fertilizer for corn suitable for saline-alkali land is characterized in that the drying temperature is 40° C. to maintain the activity of the composite bacterial agent.

[0110] The preparation method of the special fertilizer for corn suitable for saline-alkali land comprises the following steps: the stirring and mixing is performed at a rotation speed of 60 r / min, and the stirring is performed for 3-4 hours.

[0111] The special fertilizer for corn suitable for saline-alkali land is used in the prevention and treatment of corn leaf spot. Example 4

[0112] A special fertilizer for corn suitable for saline-alkali land comprises the following raw materials in parts by weight:

[0113] Urea: 110 parts,

[0114] Pyrophosphate: 7 parts

[0115] Potassium dihydrogen phosphate: 48 parts

[0116] Cow dung: 40 parts,

[0117] Modifier: 7 parts;

[0118] Composite bacterial agent: 0.5 parts;

[0119] Trace elements: 2.0 parts;

[0120] The modifier comprises veratridine, zeolite powder, biochar and humic acid, and the usage ratio of the veratridine, the zeolite powder, the biochar and the humic acid is 4:5:1:7;

[0121] The composite bacterial agent is purchased from the Guangdong Provincial Microbial Culture Collection Center, and includes Cryptococcus and Pink Trichothecene. The preservation number of the Cryptococcus is GDMCC 2.205, and the preservation number of the Pink Trichothecene is GIM 3.500.

[0122] The special fertilizer for corn suitable for saline-alkali land has a total nitrogen (N) content of urea of ​​≥46.0% and a biuret mass fraction of ≤0.9%; and the particle size of the zeolite powder ranges from 0.3 mm to 0.5 mm.

[0123] The special fertilizer for corn suitable for saline-alkali land comprises the following: the pyrophosphate is a compound preparation of one or two of manganese pyrophosphate, potassium pyrophosphate and calcium pyrophosphate; the trace elements are chelated zinc salts and magnesium salts, mainly amino acid chelated zinc and magnesium malate.

[0124] The preparation method of a special fertilizer for corn suitable for saline-alkali land comprises the following steps:

[0125] Urea, pyrophosphate, potassium dihydrogen phosphate, cow dung, modifier, compound bacterial agent, and trace elements are crushed by a mobile crusher, stirred and mixed by a stirring grinder, and finally transported to an extrusion granulator for extrusion granulation and polishing.

[0126] The preparation method of the special fertilizer for corn suitable for saline-alkali land and the preparation method of the modifier are as follows:

[0127] Veratridine, zeolite powder and biochar are first mixed, then added into humic acid to form a suspension, which is then irradiated with X-rays and finally dried and crushed.

[0128] The preparation method of the special fertilizer for corn suitable for saline-alkali land is characterized in that the drying temperature is 40° C. to maintain the activity of the composite bacterial agent.

[0129] The preparation method of the special fertilizer for corn suitable for saline-alkali land is characterized in that the rotation speed of the stirring and mixing is 60 r / min.

[0130] The special fertilizer for corn suitable for saline-alkali land is used in the prevention and treatment of corn leaf spot. Example 5

[0131] A special fertilizer for corn suitable for saline-alkali land comprises the following raw materials in parts by weight:

[0132] Urea: 100 parts,

[0133] Pyrophosphate: 5 parts

[0134] Potassium dihydrogen phosphate: 45 parts

[0135] Cow dung: 45 parts,

[0136] Modifier: 5 parts;

[0137] Compound bacterial agent: 1 part;

[0138] Trace elements: 1.5 parts;

[0139] The modifier comprises veratridine, zeolite powder, biochar and humic acid, and the usage ratio of the veratridine, the zeolite powder, the biochar and the humic acid is 5:4:2:6;

[0140] The composite bacterial agent is purchased from the Guangdong Provincial Microbial Culture Collection Center, and includes Cryptococcus and Pink Trichothecene. The preservation number of the Cryptococcus is GDMCC 2.205, and the preservation number of the Pink Trichothecene is GIM 3.500.

[0141] The special fertilizer for corn suitable for saline-alkali land has a total nitrogen (N) content of urea of ​​≥46.0% and a biuret mass fraction of ≤0.9%; and the particle size of the zeolite powder ranges from 0.3 mm to 0.5 mm.

[0142] The special fertilizer for corn suitable for saline-alkali land comprises the following: the pyrophosphate is a compound preparation of one or two of manganese pyrophosphate, potassium pyrophosphate and calcium pyrophosphate; the trace elements are chelated zinc salts and magnesium salts, mainly amino acid chelated zinc and magnesium malate.

[0143] The preparation method of a special fertilizer for corn suitable for saline-alkali land comprises the following steps:

[0144] Urea, pyrophosphate, potassium dihydrogen phosphate, cow dung, modifier, compound bacterial agent, and trace elements are crushed by a mobile crusher, stirred and mixed by a stirring grinder, and finally transported to an extrusion granulator for extrusion granulation, and then dried and polished.

[0145] The preparation method of the special fertilizer for corn suitable for saline-alkali land and the preparation method of the modifier are as follows:

[0146] Veratridine, zeolite powder and biochar are first mixed, then added into humic acid to form a suspension, which is then irradiated with X-rays and finally dried and crushed.

[0147] The preparation method of the special fertilizer for corn suitable for saline-alkali land is characterized in that the drying temperature is 40° C. to maintain the activity of the composite bacterial agent.

[0148] The preparation method of the special fertilizer for corn suitable for saline-alkali land comprises the following steps: the stirring and mixing is performed at a rotation speed of 60 r / min, and the stirring is performed for 3-4 hours.

[0149] The special fertilizer for corn suitable for saline-alkali land is used in the prevention and treatment of corn leaf spot. Comparative Example 1

[0150] A special fertilizer for corn suitable for saline-alkali land comprises the following raw materials in parts by weight:

[0151] Urea: 100 parts,

[0152] Pyrophosphate: 5 parts

[0153] Potassium dihydrogen phosphate: 45 parts

[0154] Cow dung: 45 parts,

[0155] Modifier: 5 parts;

[0156] Compound bacterial agent: 1 part;

[0157] Trace elements: 1.5 parts;

[0158] The modifier comprises veratridine and humic acid, and the usage ratio of the veratridine to the humic acid is 5:6;

[0159] The composite bacterial agent is purchased from the Guangdong Provincial Microbial Culture Collection Center, and includes Cryptococcus and Pink Trichothecene. The preservation number of the Cryptococcus is GDMCC 2.205, and the preservation number of the Pink Trichothecene is GIM 3.500.

[0160] The special fertilizer for corn suitable for saline-alkali land, wherein the total nitrogen (N) content of the urea is ≥46.0%, and the mass fraction of biuret is ≤0.9%;

[0161] The special fertilizer for corn suitable for saline-alkali land comprises the following: the pyrophosphate is a compound preparation of one or two of manganese pyrophosphate, potassium pyrophosphate and calcium pyrophosphate; the trace elements are chelated zinc salts and magnesium salts, mainly amino acid chelated zinc and magnesium malate.

[0162] The preparation method of a special fertilizer for corn suitable for saline-alkali land comprises the following steps:

[0163] Urea, pyrophosphate, potassium dihydrogen phosphate, cow dung, modifier, compound bacterial agent, and trace elements are crushed by a mobile crusher, stirred and mixed by a stirring grinder, and finally transported to an extrusion granulator for extrusion granulation and polishing.

[0164] The preparation method of the special fertilizer for corn suitable for saline-alkali land and the preparation method of the modifier are as follows:

[0165] Veratridine, zeolite powder and biochar are first mixed, then added into humic acid to form a suspension, which is then irradiated with X-rays and finally dried and crushed.

[0166] The preparation method of the special fertilizer for corn suitable for saline-alkali land is characterized in that the drying temperature is 40° C. to maintain the activity of the composite bacterial agent.

[0167] The preparation method of the special fertilizer for corn suitable for saline-alkali land comprises the following steps: the stirring and mixing is performed at a rotation speed of 60 r / min, and the stirring is performed for 3-4 hours.

[0168] The special fertilizer for corn suitable for saline-alkali land is used in the prevention and treatment of corn leaf spot. Comparative Example 2

[0169] A special fertilizer for corn suitable for saline-alkali land comprises the following raw materials in parts by weight:

[0170] Urea: 100 parts,

[0171] Pyrophosphate: 5 parts

[0172] Potassium dihydrogen phosphate: 45 parts

[0173] Cow dung: 45 parts,

[0174] Modifier: 5 parts;

[0175] Bacterial agent: 1 part;

[0176] Trace elements: 1.5 parts;

[0177] The modifier comprises veratridine, zeolite powder, biochar and humic acid, and the usage ratio of the veratridine, the zeolite powder, the biochar and the humic acid is 5:4:2:6;

[0178] The bacterial agent is purchased from Guangdong Provincial Microbial Culture Collection Center, which includes Cryptococcus, and the collection number of Cryptococcus is GDMCC 2.205.

[0179] The special fertilizer for corn suitable for saline-alkali land has a total nitrogen (N) content of urea of ​​≥46.0% and a biuret mass fraction of ≤0.9%; and the particle size of the zeolite powder ranges from 0.3 mm to 0.5 mm.

[0180] The special fertilizer for corn suitable for saline-alkali land comprises the following: the pyrophosphate is a compound preparation of one or two of manganese pyrophosphate, potassium pyrophosphate and calcium pyrophosphate; the trace elements are chelated zinc salts and magnesium salts, mainly amino acid chelated zinc and magnesium malate.

[0181] The preparation method of a special fertilizer for corn suitable for saline-alkali land comprises the following steps:

[0182] Urea, pyrophosphate, potassium dihydrogen phosphate, cow dung, modifier, compound bacterial agent, and trace elements are crushed by a mobile crusher, stirred and mixed by a stirring grinder, and finally transported to an extrusion granulator for extrusion granulation and polishing.

[0183] The preparation method of the special fertilizer for corn suitable for saline-alkali land and the preparation method of the modifier are as follows:

[0184] Veratridine, zeolite powder and biochar are first mixed, then added into humic acid to form a suspension, which is then irradiated with X-rays and finally dried and crushed.

[0185] The preparation method of the special fertilizer for corn suitable for saline-alkali land is characterized in that the drying temperature is 40° C. to maintain the activity of the bacterial agent.

[0186] The preparation method of the special fertilizer for corn suitable for saline-alkali land comprises the following steps: the stirring and mixing is performed at a rotation speed of 60 r / min, and the stirring is performed for 3-4 hours.

[0187] The special fertilizer for corn suitable for saline-alkali land is used in the prevention and treatment of corn leaf spot. Comparative Example 3

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

[0189] Urea: 100 parts,

[0190] Pyrophosphate: 5 parts

[0191] Potassium dihydrogen phosphate: 45 parts

[0192] Cow dung: 45 parts,

[0193] Modifier: 5 parts;

[0194] Bacterial agent: 1 part;

[0195] Trace elements: 1.5 parts;

[0196] The modifier comprises veratridine, zeolite powder, biochar and humic acid, and the usage ratio of the veratridine, the zeolite powder, the biochar and the humic acid is 5:4:2:6;

[0197] The bacterial agent is purchased from Guangdong Provincial Microbial Culture Collection Center, which includes pink trichothecene, and the pink trichothecene has a collection number of GIM 3.500.

[0198] The special fertilizer for corn suitable for saline-alkali land has a total nitrogen (N) content of urea of ​​≥46.0% and a biuret mass fraction of ≤0.9%; and the particle size of the zeolite powder ranges from 0.3 mm to 0.5 mm.

[0199] The special fertilizer for corn suitable for saline-alkali land comprises the following: the pyrophosphate is a compound preparation of one or two of manganese pyrophosphate, potassium pyrophosphate and calcium pyrophosphate; the trace elements are chelated zinc salts and magnesium salts, mainly amino acid chelated zinc and magnesium malate.

[0200] The preparation method of a special fertilizer for corn suitable for saline-alkali land comprises the following steps:

[0201] Urea, pyrophosphate, potassium dihydrogen phosphate, cow dung, modifier, compound bacterial agent, and trace elements are crushed by a mobile crusher, stirred and mixed by a stirring grinder, and finally transported to an extrusion granulator for extrusion granulation, and then dried and polished.

[0202] The preparation method of the special fertilizer for corn suitable for saline-alkali land and the preparation method of the modifier are as follows:

[0203] Veratridine, zeolite powder and biochar are first mixed, then added into humic acid to form a suspension, which is then irradiated with X-rays and finally dried and crushed.

[0204] The preparation method of the special fertilizer for corn suitable for saline-alkali land is characterized in that the drying temperature is 40° C. to maintain the activity of the bacterial agent.

[0205] The preparation method of the special fertilizer for corn suitable for saline-alkali land comprises the following steps: the stirring and mixing is performed at a rotation speed of 60 r / min, and the stirring is performed for 3-4 hours.

[0206] The special fertilizer for corn suitable for saline-alkali land is used in the prevention and treatment of corn leaf spot. Comparative Example 4

[0207] Chinese invention patent, application number: CN201310645212.0, public announcement number: CN103664369B, discloses a synergistic and controlled loss fertilizer and its preparation method. The specific implementation method of its specification is as follows:

[0208] "Total N ≥ 26% synergistic controlled loss fertilizer, the specific process steps are as follows:

[0209] (1) 243.6 kg of ammonium chloride (containing N-24.0%), 216.5 kg of ammonium sulfate (containing N-20.5%), and 43.3 kg of ammonium bicarbonate (containing N-17.1%) were weighed separately, crushed by a chain crusher, and then fed into a twin-shaft mixer, mixed evenly with 117.0 kg of zeolite powder, 30.9 kg of sodium humate, 1.6 kg of polyacrylamide, 37.9 kg of chelated iron, 0.7 kg of brown sugar, 6 kg of asbestos powder, 0.4 kg of potassium nitrophenolate, and 0.8 kg of additives, and then fed into a disc granulator;

[0210] (2) Spraying 297.7 kg of 92% ammonium nitrate solution by mass onto the mixed material in the disc granulator;

[0211] (3) One-stage drying, one-stage cooling and coarse and fine screening are adopted. After screening, particles with a particle size of 2.00-4.75 mm enter the coating machine, large particles larger than 4.75 mm are returned to the crushing machine, and fine particles smaller than 2.00 mm are returned to the granulation machine;

[0212] (4) For each ton of particles with qualified particle size after screening, 3.61 kg of oily anti-caking agent is sprayed in a coating machine through an atomizing nozzle using a plunger metering pump to produce a functional nitrogen fertilizer.

[0213] (5) 793.7 kg of the functional nitrogen fertilizer and 206.3 kg of urea (containing 46.2% N) were weighed and fed into a single bag batching and blending device, where they were blended and automatically packaged to obtain the finished product. Comparative Example 5

[0214] Chinese invention patent, application number: CN201610048327.5, public announcement number: CN106995329A, discloses a fertilizer synergist and an organic fertilizer using the same, and the specific implementation method of its specification is as follows:

[0215] 1. Mix 3 parts by weight of attapulgite (colloidal grade, 200 mesh) and 7 parts by weight of sepiolite (colloidal grade, 200 mesh particle size) evenly. Add the mixture to a stainless steel cup containing aqueous ammonia to form a 5 g / L suspension. Seal the cup and allow it to stand at -70°C for 4 hours. Transfer the suspension to a glass dish, dry it at 50°C, and crush it to a 200 mesh particle size.

[0216] 2. 300 parts by weight of the powder obtained in (1) and 3 parts by weight of amino silicone oil were mixed evenly and added to ethanol to prepare a 10 g / L suspension. The suspension was then irradiated with X-rays (1000 kV, 10 kGy) for 5 minutes, dried at 50 degrees Celsius, and crushed to 200 mesh.

[0217] 3. Mix 300 parts by weight of the powder obtained in (2) and 3 parts by weight of 3,4-dimethylpyrazole phosphate (particle size 600 mesh) to obtain a fertilizer synergist.

[0218] 4. Add the synergist into conventional organic fertilizer at a mass fraction of 10%, and granulate it through a drum (particle size 5 mm) to obtain synergistic organic fertilizer.

[0219] The results of a 2015 trial in Guyuan, Ningxia, showed that the application of this enhanced organic fertilizer (1,000 jin / mu) increased potato yield (Qingshu 168, Gansu Dingxi Ailan Potato Industry Co., Ltd.) by 10.4% under isotropic conditions compared to the control group that only added conventional organic fertilizer. After reducing the application rate of organic fertilizer by 100 jin per mu, the yield of the experimental group 2 that added the synergist of this application still increased by 6.4%. Example 6

[0220] Specific application of fertilizers in Examples 1-5 and Comparative Examples 1-5:

[0221] We investigated the performance indicators of different corn fertilizers suitable for saline-alkali land, and the results are as follows (as shown in Table 1):

[0222] The specific testing method is as follows: A corn saline-alkali test site (total salt content of 1.3%) was selected in a city in Shandong Province. After healthy corn (in the seedling stage, seeds purchased from Hefei Fengle Seed Co., Ltd., variety "Fengle No. 21") were transplanted, the above-mentioned fertilizers were applied. At the same time, an infection test with the pathogen of corn leaf blight (Hymenospora maydis) was conducted. Subsequently, the quality and infection status of the corn were statistically analyzed during the flowering and grain stage.

[0223] Table 1

[0224] ;

[0225] The test shows (combined with Table 1) that the average corn yield in Examples 1-5 (ranging from 15697 kg / hm2) is higher than that in Comparative Examples 1-5. 2 -16235kg / hm 2 ) is higher, the average starch content of corn kernels (ranging from 79.3 mg to 81.5 mg) is higher, the average protein content of corn kernels (ranging from 11.7% to 12.9%) is higher, and the average infection rate (ranging from 5.5% to 6.3%) is lower. It can be seen that the fertilizers prepared in Examples 1-5 can effectively improve the quality of corn and prevent and control the infection of corn leaf blight; among them, the fertilizer prepared in Example 5 has relatively large significant differences in various indicators.

[0226] 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 corn, but also prevent and control the infection of corn leaf blight fungus.

[0227] The above content is a further detailed description of the present invention in conjunction 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, they can make several simple deductions or substitutions without departing from the concept of the present invention, which should be regarded as falling within the scope of protection determined by the claims submitted for the present invention.

Claims

1. A special fertilizer for corn suitable for saline-alkali land, characterized by: In parts by weight, it includes the following raw materials: Urea: 80-120 parts, Pyrophosphate: 1-10 parts Potassium dihydrogen phosphate: 40-50 parts Cow dung: 30-60 parts, Modifier: 2-7 parts; Composite bacterial agent: 0.5-1.5 parts; Trace elements: 0.5-2.0 parts; The modifier comprises veratridine, zeolite powder, biochar and humic acid, and the usage ratio of the veratridine, the zeolite powder, the biochar and the humic acid is (3-6): (3-5): (1-2): (5-8); The composite bacterial agent is purchased from the Guangdong Provincial Microbial Culture Collection Center, and includes Cryptococcus and Pink Trichothecene. The preservation number of the Cryptococcus is GDMCC 2.205, and the preservation number of the Pink Trichothecene is GIM 3.

500.

2. The special fertilizer for corn suitable for saline-alkali land according to claim 1, characterized in that: In parts by weight, it includes the following raw materials: Urea: 90-110 parts, Pyrophosphate: 3-7 parts Potassium dihydrogen phosphate: 42-48 parts Cow dung: 40-50 parts, Modifier: 2-7 parts; Composite bacterial agent: 0.5-1.5 parts; Trace elements: 0.5-2.0 parts; The modifier comprises veratridine, zeolite powder, biochar and humic acid, and the usage ratio of the veratridine, the zeolite powder, the biochar and the humic acid is (3-6): (3-5): (1-2): (5-8); The composite bacterial agent is purchased from the Guangdong Provincial Microbial Culture Collection Center, and includes Cryptococcus and Pink Trichothecene. The preservation number of the Cryptococcus is GDMCC 2.205, and the preservation number of the Pink Trichothecene is GIM 3.

500.

3. The special fertilizer for corn suitable for saline-alkali land according to claim 2, characterized in that: In parts by weight, it includes the following raw materials: Urea: 100 parts, Pyrophosphate: 5 parts Potassium dihydrogen phosphate: 45 parts Cow dung: 45 parts, Modifier: 5 parts; Compound bacterial agent: 1 part; Trace elements: 1.5 parts; The modifier comprises veratridine, zeolite powder, biochar and humic acid, and the usage ratio of the veratridine, the zeolite powder, the biochar and the humic acid is 5:4:2:6; The composite bacterial agent is purchased from the Guangdong Provincial Microbial Culture Collection Center, and includes Cryptococcus and Pink Trichothecene. The preservation number of the Cryptococcus is GDMCC 2.205, and the preservation number of the Pink Trichothecene is GIM 3.

500.

4. The special fertilizer for corn suitable for saline-alkali land according to any one of claims 1 to 3, characterized in that: The total nitrogen (N) content of the urea is ≥46.0%, and the mass fraction of biuret is ≤0.9%. The particle size of the zeolite powder ranges from 0.3 mm to 0.5 mm.

5. The special fertilizer for corn suitable for saline-alkali land according to any one of claims 1 to 3, characterized in that: The pyrophosphate is a compound preparation of one or two of manganese pyrophosphate, potassium pyrophosphate and calcium pyrophosphate; the trace elements are chelated zinc salt and magnesium salt, mainly amino acid chelated zinc and magnesium malate.

6. A method for preparing a special fertilizer for corn suitable for saline-alkali land, comprising the following steps: First, urea, pyrophosphate, potassium dihydrogen phosphate, cow dung, modifier, compound bacterial agent, and trace elements are crushed by a mobile crusher, stirred and mixed by a stirring grinder, and finally transported to an extrusion granulator for extrusion granulation, and then dried and polished.

7. The method for preparing a special fertilizer for corn suitable for saline-alkali land according to claim 6, characterized in that: The preparation method of the modifier is as follows: Veratridine, zeolite powder and biochar are first mixed, then added into humic acid to form a suspension, which is then irradiated with X-rays and finally dried and crushed.

8. The method for preparing a special fertilizer for corn suitable for saline-alkali land according to claim 7, characterized in that: The drying temperature is 40° C. to maintain the activity of the composite bacterial agent.

9. The method for preparing a special fertilizer for corn suitable for saline-alkali land according to claim 6, characterized in that: The stirring and mixing speed is 60r / min, and the stirring is performed for 3-4 hours.

10. Use of the special fertilizer for corn suitable for saline-alkali land according to claim 1 in the prevention and treatment of corn leaf blight.

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