Selenium-rich organic slow-release fertilizer and production method thereof

The invention discloses a selenium-rich organic slow-release fertilizer.The selenium-rich organic slow-release fertilizer is mainly prepared from, by weight, 70-90 parts of chicken manure, 25-38 parts of cow manure, 10-18 parts of pond sludge, 5-8 parts of gecko manure, 4-7 parts of pangolin manure, 35-50 parts of fiber-containing biomass, 30-35 parts of bean pulp, 5-12 parts of shell powder, 10-16 parts of oyster shell powder, 5-8 parts of a strain, 20-26 parts of potassium humate, 20-30 parts of activated selenium ore powder, 30-50 parts of attapulgite and 1-3 parts of polyacrylamide.A production method of the selenium-rich organic slow-release fertilizer includes the following steps that 1, shell powder, oyster shell powder, bean pulp, fiber-containing biomass and the strain are subjected to primary fermentation; 2, the PH is regulated, and potassium humate, part of activated selenium ore powder, livestock and poultry manure and pond sludge are added and subjected to secondary fermentation; 3, attapulgite,