NITROGEN - PRESERVING AND DEODORIZING ADDITIVE FOR COMPOSTING FERMENTATION OF SOLID MANURE

Disclosed is a nitrogen - preserving and deodorizing additive for composting fermentation of 5 solid manure relates to the technical field of nitrogen fixation additives for composting of the solid manure. The nitrogen - preserving and deodorizing additive comprises the following raw materials: puffed feather powder, molasses, ferrous sulphate, calcium superphosphate, biomass charcoal and urease inhibitors. In the present invention, the puffed feather powder and the molasses are combined as a protein additive and a carbon source adding raw material, thereby 10 effectively proliferating functional bacteria in the composting fermentation process; and ferrous sulphate and calcium superphosphate are added at the same time, and the ratio of ferrous sulphate and calcium superphosphate is optimized, i.e., the pH valve of the materials for composting fermentation of the solid manure can be adjusted to 6 - 7.5, so that the nitrogen nutrition exists in a form of ammonium salt, thereby reducing volatilization of ammonia and 15 ensuring rapid increase of fermentation temperature. According to the present invention, the biomass charcoal is adopted for adsorbing a part of volatilized ammonia gas or hydrogen sulphide in solid manure compost, and meanwhile, the carbon - nitrogen ratio can be adjusted, so as to promote increase of the fermentation temperature; the urease inhibitors are adopted for inhibiting proteolysis, reducing the volatilization of ammonia and preserving the nitrogen nutrition; and rice 20 bran is added for adjusting the carbon - nitrogen ratio of the materials for fermentation.