Modified-polyvinyl alcohol-coated long-effect slow-release compound fertilizer

Abstract

The invention relates to the field of compound fertilizers, and in particular relates to a modified-polyvinyl alcohol-coated long-effect slow-release compound fertilizer. The fertilizer is made from the following raw materials in parts by weight: 10-15 parts of 1250-2000-mesh kieselguhr, 8-10 parts of soybean residue, 12-14 parts of ammonium nitrate, 15-18 parts of thoroughly decomposed pig manure, 12-14 parts of fly ash, 28-30 parts of ammonium bicarbonate, 12-15 parts of dairy cow excrement, 5-7 parts of pineapple leaf, 3-5 parts of charcoal powder, 2-5 parts of zinc acetate, 3-5 parts of sodium gluconate, 6-8 parts of calcium carbonate, 23-25 parts of ammonium dihydrogen phosphate, 1-3 parts of moleplant seed powder, 8-10 parts of cell culture medium waste liquor, 10-12 parts of tobacco leftovers, 3-5 parts of sodium thiosulfate, 1-3 parts of sodium caseinate, 10-12 parts of polyvinyl alcohol, 6-8 parts of sodium carboxymethylcellulose, 0.5-1 part of nanometer zinc oxide and 4-5 parts of assistant. The compound fertilizer disclosed by the invention has the advantages that the raw material sources are abundant, rich in various organic matters and capable of increasing the soil activity; nutrients are doubly coated by utilizing the kieselguhr and modified polyvinyl alcohol slow-release coating agent in the production process, so that the compound fertilizer has excellent and long-lasting slow-release control ability, more long-lasting and efficient fertilizer effect and obvious production and income increasing effect.

Description

technical field [0001] The invention relates to the field of compound fertilizers, in particular to a modified polyvinyl alcohol-coated long-acting slow-release compound fertilizer. Background technique [0002] In modern agricultural production, compound fertilizer can be seen everywhere. It has the advantages of high nutrient content, less auxiliary components, high fertilizer utilization rate, and convenient storage and application. It plays an important role in promoting high and stable crop yields. Slow-release compound fertilizer is an important category of compound fertilizers, and it is also the focus of research on the development of my country's chemical fertilizer industry. Its slow-release principle is to coat a thin layer of hydrophobic substances on the surface of fertilizer particles, so that the internal nutrients are slowly released to the In the soil, nutrients are continuously supplied to crops, which effectively improves the utilization rate of fertilizers...

AI Technical Summary

Problems solved by technology

However, the existing slow-release compound fertilizers still have certain shortcomings, mainly in that the nutrient ratio is relatively fixed, and it is difficult to meet the different needs of various soils and various crops; the slow-release effect is not satisfactory, and does not match the growth needs of crops , thereby reducing fertilizer efficiency, affecting crop growth, resulting in reduced production and income