Special film-coated controlled release fertilizer for peanut in high yield field and preparation process thereof

A special film-coated controlled release fertilizer for peanut in a high yield field, comprising an outer layer, an intermediate layer and an inner layer, wherein the raw materials in each layer and the proportions thereof are as follows:

• the outer layer:
• 30-50 parts of urea formaldehyde powder, 20-40 parts of fermented livestock and poultry manure, 30-50 parts of urea, 10-15 parts of hyperbranched polyamide, and 0.3-0.5 part of celest;
• the intermediate layer:
• 55-75 parts of calcium nitrate, 10-20 parts of ammonium polyphosphate, 0.1-0.3 part of uniconazole, 15-30 parts of humic acid, 0.001-0.1 part of chitosan oligosaccharide, and 65-85 parts of urea formaldehyde powder;
• and
• the inner layer:
• 30-50 parts of potassium dihydrogen phosphate, 40-60 parts of urea, 1-3 parts of seaweed extract, and 20-40 parts of adhesive.