Compound fertilizer and preparation process thereof

Abstract

The invention relates to the field of compound fertilizer preparation, in particular to a compound fertilizer and a preparation process thereof. The process comprises the following steps: S1, mixing the human and animal excreta, the straw, the sawdust and the cavings, and performing sealed fermentation to form a fermented material; s2, ammonium dihydrogen phosphate, urea and potassium sulfate are mixed and then added into a material spraying device; s3, ammonium dihydrogen phosphate, urea and potassium sulfate are sprayed on the fermentation material through a spraying device, and the fermentation material is continuously turned over in the spraying process; and S4, stirring the ammonium dihydrogen phosphate, the urea, the potassium sulfate and the fermentation material. The sealed fermentation time in the step S1 is 21 days. The human and animal manure is chicken manure and human manure, and the weight ratio of the chicken manure to the human manure is 4: 6. Ammonium dihydrogen phosphate, urea and potassium sulfate can be sprayed on the fermentation material through the material spraying device, so that the ammonium dihydrogen phosphate, the urea and the potassium sulfate are more easily mixed into human and animal excreta, straws, sawdust and cavings.

Description

technical field [0001] The invention relates to the field of compound fertilizer preparation, in particular to a compound fertilizer and a preparation process thereof. Background technique [0002] Compound fertilizers are chemical fertilizers containing two or more nutrient elements, which play an important role in balancing fertilization, improving fertilizer utilization, and promoting high crop yields. Compound fertilizers have the advantages of few auxiliary components and good physical properties. However, in the preparation of compound fertilizer, when ammonium dihydrogen phosphate, urea and potassium sulfate are directly mixed with human and animal manure, straw, sawdust and grain bran, ammonium dihydrogen phosphate, urea and potassium sulfate are easily aggregated and agglomerated, and are not easily mixed into human and animal manure, In straw, sawdust and chaff. SUMMARY OF THE INVENTION [0003] In order to overcome the deficiencies of the prior art, the presen...

AI Technical Summary

Problems solved by technology

However, when preparing compound fertilizers, when ammonium dihydrogen phosphate, urea and potassium sulfate are directly mixed with human and animal manure, straw, sawdust and rice bran, ammonium dihydrogen phosphate, urea and potassium sulfate are easy to aggregate and agglomerate, and are not easy to mix into human and animal manure, Straw, sawdust and chaff

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