Production method of nitrogen slow-release type organic fertilizer

Abstract

The invention discloses a production method of a nitrogen slow-release type organic fertilizer. By means of the method, a urea formaldehyde slow-release nitrogen fertilizer is evenly mixed into an organic fertilizer, urea and formaldehyde are made to react under alkaline conditions to generate soluble small-molecular urea formaldehyde, the small-molecular urea formaldehyde is mixed with a raw material with monoammonium phosphate, the polymerization of the urea formaldehyde is promoted due to the acidity of the monoammonium phosphate, the urea formaldehyde and other raw materials can be easilywetted and mixed sufficiently to form unsoluble urea formaldehyde, the utilization of the slow-release nitrogen fertilizer can be effectively improved in the use process, and the slow-release long-term effect is realized, and the utilization rate of the fertilizer is increased; the purpose of reusing straw and agricultural product processing waste is achieved; when the fertilizer is used as a cropfertilizer, the fertilizer consumption is reduced, meanwhile the crop yield can be greatly improved, the requirements of crop for a nitrogen fertilizer in the whole growth period are met by one timeof fertilizer applying, the growth efficiency and survival rate of crop are increased, time, labor and manpower are saved for farmers, production cost is reduced, pollution is reduced, and the ecological environment is protected.

Description

technical field [0001] The invention belongs to the technical field of slow-release organic fertilizer production, in particular to a production method of nitrogen slow-release organic fertilizer. Background technique [0002] Straw is the general term for the stems and leaves (ears) of mature crops. Usually refers to the remaining part of wheat, rice, corn, potatoes, oilseeds, cotton, sugar cane and other crops (usually coarse grains) after harvesting seeds. More than half of the photosynthetic products of crops exist in straw, which is rich in nitrogen, phosphorus, potassium, calcium, magnesium and organic matter, etc. It is a multi-purpose renewable biological resource, and straw is also a roughage. It is characterized by high crude fiber content (30%-40%), and contains lignin, etc. According to the statistics of Zhang Fudao et al., leguminous crop straw contains more nitrogen, gramineous crop straw contains more potassium, and the nutrients provided by crop straw Accou...

AI Technical Summary

Problems solved by technology

[0006] Straw returning to the field does not allow the crops to fully utilize the substances contained in the straw itself, and some crops cannot adapt to the soil after the straw is returned to the field, which will hinder the growth and development of the crops, and some may even die, making the direct return of the straw to the field cause serious damage. cut production

At present, there are also many people studying how to make straw into fertilizer and then return it to the field. The general method is to crush the straw first, add bacterial agents to ferment, and then add urea, formaldehyde and other fertilizers to make organic fertilizers, but it is used in the production of organic fertilizers. In the fertilizer process, urea and formaldehyde are directly added to the fertilizer for fermentation, and the required fertilizer cannot be obtained. After topdressing the crops with the prepared organic fertilizer, the fertilizer effect is not significantly different from that of a single fertilizer

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