Nitrogen-rich carbon-based slow release fertilizer and preparation method thereof

Abstract

The invention discloses a nitrogen-rich carbon-based slow release fertilizer. The nitrogen-rich carbon-based slow release fertilizer is prepared from raw materials in parts by weight as follows: 8-10 parts of attapulgite, 6-9 parts of urea, 24-28 parts of chicken manure and urine, 5-7 parts of humic acid raw powder, 4-6 parts of a modified tapioca starch solution, 4-7 parts of ammonium chloride, 1-2 parts of zinc sulfate, 20-24 parts of biogas broth, 14-16 parts of rice straw and 18-22 parts of wheat bran. According to the carbon-based slow release fertilizer, ammonium chloride, urea and other ingredients with high nitrogen content are added on the basis of chicken manure and urine, biogas broth and other organic materials, and an organic and inorganic raw material mixed matching method is adopted, so that sufficient nitrogen is supplied to crops in each period after use of the fertilizer; meanwhile, after the carbon-based slow release layer enters the soil, the nitrogen fixing capacity of soil can be improved, nitrogen loss is reduced, and nitrogen absorption of the crops is further guaranteed.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a nitrogen-rich carbon-based slow-release fertilizer and a preparation method thereof. Background technique [0002] Biochar is an insoluble porous solid material formed by pyrolysis of plant biomass at low temperature. It has high biochemical stability. After entering the soil, it can significantly improve the physical and chemical properties of the soil. It is an excellent fertilizer Sustained release material. However, the use of biochar to make slow-release fertilizers is rarely used in the market at present. Most farmers are reluctant to use high-priced slow-release fertilizers due to cost considerations. Therefore, carbon-based slow-release fertilizers cannot be used on a large scale. At the same time, most of the polymer coating materials widely used in the market are non-degradable polymers, and the residue after application will damage the soil structure. For t...

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Problems solved by technology

However, the use of biochar to make slow-release fertilizers is rarely used in the market at present. Most farmers are reluctant to use high-priced slow-release fertilizers due to cost considerations. Therefore, carbon-based slow-release fertilizers cannot be used on a large scale. At the same time, most of the polymer coating materials widely used in the market are non-degradable polymers, and the residue after application will damage the soil structure.