Special controllable slow-release organic fertilizer for rice and preparation method of organic fertilizer

Abstract

The invention discloses a special controllable slow-release organic fertilizer for rice. The organic fertilizer is prepared from raw materials in parts by weight as follows: 5-6 parts of ocher, 55-65 parts of cow dung, 3-4 parts of calamine, 2-3 parts of urea, 3-4 parts of zinc sulfate, 15-25 parts of kaolin, 6-8 parts of hydrilla varticillata powder, 3-4 parts of spodumene powder, 4-5 parts of ammonium dihydrogen phosphate, 2-3 parts of potassium persulfate, 10-12 parts of straw stalk, 5-6 parts of soybean oil residues, 3-4 parts of illite powder, 8-10 parts of sawdust, 20-30 parts of a soil conditioner, 4-5 parts of an EM agent and a proper amount of water. According to the fertilizer, the cow dung is taken as a main raw material, and slow release of the fertilizer is controlled accurately through strict control on particle sizes of fertilizer granules, so that the requirement of the rice for the fertilizer in different growth periods is met; meanwhile, multiple highly-absorbent raw materials in the raw materials are used, so that pesticide residues and heavy metal pollution in soil can be eliminated, and the foundation is laid for the green and ecological agriculture.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a special controllable slow-release organic fertilizer for rice and a preparation method thereof. Background technique [0002] my country is a large agricultural country, and agriculture is the foundation of the national economy, of which planting accounts for more than half, and the quality of fertilizers directly affects the output of planting, and is an important factor for increasing crop production. However, in order to pursue crop yields, farmers blindly apply chemical fertilizers, resulting in a downward trend in soil organic matter content, weakened soil buffer capacity, decline in disaster resistance, low fertilizer use efficiency, and reduced soil fertility. With the emergence of environmental problems caused by excessive use of chemical fertilizers, the promotion of pollution-free agriculture, and the continuous expansion of the research field of new fertilizers, ...

AI Technical Summary

Problems solved by technology

However, in order to pursue crop yields, farmers blindly apply chemical fertilizers, resulting in a downward trend in soil organic matter content, weakened soil buffer capacity, decline in disaster resistance, low fertilizer use efficiency, and reduced soil fertility.

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