Special slow-release fertilizer for millet and preparation method of special slow-release fertilizer

The invention relates to the technical field of agricultural fertilizers, and particularly discloses a special slow release fertilizer for foxtail millet and a preparation method thereof.The special slow release fertilizer for foxtail millet is prepared from, by weight, 50-80 parts of humic acid, 30-60 parts of furfural residues, 25-30 parts of coated urea, 10-15 parts of phosphate fertilizer, 20-40 parts of potash fertilizer, 10-30 parts of nanocellulose, 20-50 parts of charcoal, 5-15 parts of polyacrylamide and 50-100 parts of water. According to the present invention, the variety and the mixing amount of the raw materials are adjusted so as to make the nutrient release time of the obtained slow release fertilizer exceed 3 months, such that the millet growth and the nutrition accumulation are easily achieved; after the slow-release fertilizer is applied to millet, the highest yield of the planted millet is 1.361 kg/15 m < 2 >, the yield of the millet is remarkably increased, and it is proved that the slow-r