Slow-release compound fertilizer and preparation method thereof

Abstract

The invention discloses a slow-release compound fertilizer and a preparation method thereof. The slow-release compound fertilizer comprises the following raw materials in parts by weight: 50-70 partsof dry powder, 3-5 parts of copper sulfate, 10-14 parts of ammonium molybdate, 15-25 parts of gutta-percha, 4-8 parts of xanthan gum, 6-8 parts of raw shell powder, 10-15 parts of fish bone meal, 4-6parts of fruit husk carbon powder, 1-3 parts of zinc citrate, 2-4 parts of diaminoferric xanthohumate, 4-6 parts of sepiolite powder, 10-14 parts of adhesive, 20-40 parts of rapeseed cake, 4-6 parts of chitosan, 1-3 parts of urea phosphate, 6-8 parts of borax, 4-6 parts of ammonium chloride, 7-9 parts of diammonium phosphate, 10-14 parts of magnesium humate, 6-8 parts of boric acid, 2-4 parts of calcium dihydrogen phosphate, 3-5 parts of zinc-amino acid chelate, 9-13 parts of manganese sulfate, 2-4 parts of molybdenum sulfate, 3-5 parts of slow-release agent and 4-6 parts of zinc-rich additive. As that invention has the advantage of simple process, short production period, wide raw material source, low equipment requirement, excellent slow release performance, effective slow release of fertilizer effect of fertilize granules, improvement of utilization efficiency and quality of fertilizer nutrients, reduction of fertilizer failure, and effective improvement of crop yield and quality.

Description

technical field [0001] The invention relates to the technical field of fertilizer preparation, in particular to a slow-release compound fertilizer and a preparation method thereof. Background technique [0002] At present, the known compound fertilizer is in a kind of chemical fertilizer, contains two or more fertilizers in the three elements of nitrogen, phosphorus and potassium. Compound fertilizer has the advantages of high nutrient content, less auxiliary components and good physical properties. Compound fertilizer has a long fertilizer effect and should be used as base fertilizer. It decomposes slowly. For crops that use compound fertilizer as base fertilizer during sowing, due to the law of fertilizer demand of different crops, it is necessary to supplement available nitrogen fertilizer in time when topdressing to meet the nutritional needs of crops. However, long-term field experiments and research results show that the nutrient ratio of compound fertilizers is alway...

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned use of acrylate as the slow-release fertilizer coating is not easy to degrade and the cost is high