Seaweed ammonium phosphate fertilizer and preparation method thereof

Abstract

The invention provides a seaweed ammonium phosphate fertilizer and a preparation method thereof. The seaweed ammonium phosphate fertilizer is characterized by being prepared from a concentrated solution or powder of seaweed oligose phosphate and ammonium phosphate. According to the preparation method, the seaweed oligose phosphate is firstly prepared, the oligose molecular weight of the seaweed oligose phosphate is 1000-5000Da, by combining with the preparation technology of ammonium phosphate fertilizer, a seaweed monoammonium phosphate and seaweed diammonium phosphate fertilizer is prepared from 1-5 parts by weight of concentrated solution of seaweed oligose phosphate and 95-99 parts by weight of ammonium phosphate, or the seaweed monoammonium phosphate and seaweed diammonium phosphate fertilizer is prepared by 0.2-1 part by weight of powder of seaweed oligose phosphate and 99-99.8 parts by weight of ammonium phosphate. The seaweed oligose phosphate and ammonium phosphate fertilizer are combined, so that the absorptivity and use ratio of the ammonium phosphate fertilizer by crops are improved, soil hardening caused by application of a single ammonium phosphate fertilizer is relieved, the ecological environment of the farmland is optimized, the fertilizer disproportionality is lightened, and the preparation method is simple and reasonable.

Description

technical field [0001] The invention belongs to the technical field of chemical fertilizer production, and relates to the production technology of ammonium phosphate fertilizer, in particular to a seaweed ammonium phosphate fertilizer and a preparation method thereof. Background technique [0002] At present, there are many application technologies of seaweed in fertilizers, among which the extraction technology of seaweed polysaccharide generally adopts one technology or a combination of several technologies such as acid method, alkali method, compound enzymatic hydrolysis method, microbial degradation method and ultrasonic degradation method. Among them, the degradation of polysaccharides by acidic high-pressure degradation is relatively thorough, basically existing in the form of small molecule oligosaccharides, but the degradation process is too severe, and the damage to other active ingredients in seaweed is relatively large; the conditions of alkaline degradation are re...

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Problems solved by technology

Among them, the degradation of polysaccharides by acidic high-pressure degradation is relatively thorough, basically existing in the form of small molecule oligosaccharides, but the degradation process is too severe, and the damage to other active ingredients in seaweed is relatively large; the conditions of alkaline degradation are relatively mild, but the molecular weight of the degraded polysaccharides is relatively mild. Larger, it is easy to form colloids in water, so it is easy to gel and precipitate during the compounding process; the compound enzyme degradation method has higher requirements for raw material pretreatment, and it needs to reach a certain fineness to effectively degrade, and the molecular weight of the degraded polysaccharide is also the same There are problems such as large molecular weight and easy gelation; the microbial degradation method takes too long, and there are problems of incomplete degradation and low extraction rate; ultrasonic degradation method has high requirements for seaweed raw material pretreatment and equipment, which leads to its popularization. limit