Preparation method for special slow-release long-acting compound fertilizer for corn

Abstract

The invention provides a preparation method for a corn-special slow-release long-acting compound fertilizer, and belongs to the preparation of a mixture of a plurality of fertilizers and components without special fertilizer efficiency. The corn-special slow-release long-acting compound fertilizer is prepared by taking compound fertilizer particles as fertilizer cores, then performing coating and dusting powder treatments. The compound fertilizer particles are prepared by the following raw materials by mass: 15 to 45 parts of urea, 5 to 40 parts of ammonium sulfate, 20 to 35 parts of potassium sulfate, 15 to 35 parts of a mixed phosphate fertilizer, 0.1 to 0.5 part of a zinc and iron additive, 7 to 10 parts of a granulating auxiliary agent and a proper amount of water. The preparation method for the compound fertilizer comprises the following steps: (1) preparation of a compound of a potash fertilizer and a nitrogen fertilizer; (2) preparation of the mixed phosphate fertilizer; (3) preparation of mixed particles of the components of the compound fertilizer; (4) coating with stearic acid; (5) powder spreading of a modified zeolite powder material; and (6) screening, metering, quality inspection and packaging of qualified fertilizer. The invention provides the preparation method for the corn-special slow-release long-acting compound fertilizer which has overall nutrients and excellent slow releasing performance, improves both output and quality of corn, and saves resources and protects the environment.

Description

technical field [0001] The invention relates to a preparation method of a slow-release long-acting compound fertilizer specially used for corn. It belongs to the preparation of a mixture of various fertilizers and components without special fertilizer effects. Background technique [0002] Corn is an important food crop and economic crop. According to statistics, its yield and planting area are second only to rice and wheat, ranking third in the world. It plays an important role in people's livelihood and national economy. Effective use of limited land resources to improve the yield and quality of corn crops is the direction and eternal subject of people's efforts. [0003] The growth and development of corn needs to absorb more than 20 kinds of mineral elements, mainly including nitrogen, phosphorus, and potassium, three major elements; sulfur, calcium, magnesium and other macroelements, and iron, manganese, boron, and copper. Zinc, sodium and other trace elements. Maiz...

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Problems solved by technology

[0010] 2. The coating material is difficult to degrade, and long-term use will have a negative impact on the soil; even pollute the soil and affect the quality of agricultural products

[0011] 3. The ratio of the main nutrient elements in the fertilizer is not reasonable, and the utilization rate of the fertilizer is low

[0012] 4. Lack of necessary medium or trace elements, incomplete nutrition, affecting yield increase

[0013] 4. The utilization rate of nitrogen fertilizer is low, wasting resources and polluting the environment

[0014] 5. The preparation method of slow-release long-acting compound fertilizer dedicated to corn is rare

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