High-nitrogen composite fertilizer and preparation method thereof

Abstract

The invention discloses a high-nitrogen composite fertilizer and a preparation method thereof. The preparation method comprises the following main steps: adding component raw materials namely potassium chloride, monoammonium phosphate, urea, ammonium bicarbonate, ammonium sulfate and calcium powder into a conveyor in a certain weight part for sufficiently and evenly mixing; breaking and mixing, and then successively carrying out pelleting, drying, cooling, secondary screening and coating; and finally, packaging to obtain a finished product. The preparation method disclosed by the invention is simple; the prepared high-nitrogen composite fertilizer can effectively provide lodging resistance, disease resistance and drought resistance for crops; and the absorption rate of the crop is high, and the damage on soil is also correspondingly retarded.

Description

technical field [0001] The invention relates to a high-nitrogen compound fertilizer and a preparation method thereof, belonging to the field of fertilizers. Background technique [0002] my country is a big producer of chemical fertilizers and a big consumer of chemical fertilizers. Most of the nutrients in compound fertilizers are absorbed by the soil, and the absorption rate of plants is very low, resulting in soil pollution by nitrates and nitrites, soil compaction, and the generation of harmful gases. Therefore, the pollution of chemical fertilizers and pesticides to the soil is another crisis, and the absorption rate of crops is poor, the survival of crops is seriously affected, resulting in a reduction in crop production. [0003] At present, the compound fertilizers produced in China are mainly ordinary compound fertilizers or slow / controlled release fertilizers. The utilization rate of ordinary compound fertilizers is low and the loss is large. The slow / controlled rel...

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Problems solved by technology

[0002] my country is a big producer of chemical fertilizers and a big consumer of chemical fertilizers. Most of the nutrients in compound fertilizers are absorbed by the soil, and the absorption rate of plants is very low, resulting in soil pollution by nitrates and nitrites, soil compaction, and the generation of harmful gases. Therefore, the pollution of the soil by chemical fertilizers and pesticides is another crisis, and the absorption rate of crops is poor, the survival of crops is seriously affected, resulting in the reduction of crop production

[0003] At present, the compound fertilizers produced in China are mainly ordinary compound fertilizers or slow / controlled release fertilizers. The utilization rate of ordinary compound fertilizers is low and the loss is large. The slow / controlled release fertilizers focus on controlling the slow / release of nutrients and the growth of crops in the early and middle stages. The nutrient supply is not enough, resulting in low utilization rate of fertilizers in the current season, and there will also be loss

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