Catechol-containing polyurethane coated slow release compound fertilizer

Abstract

The invention relates to the field of compound fertilizers, and in particular relates to a catechol-containing polyurethane coated slow release compound fertilizer which comprises the following raw materials by weight: 10-15 parts of 1250-2000 mesh diatomite, 6-9 parts of bean curd wastewater, 12-15 parts of phosphorus pentoxide, 6-8 parts of sodium poly aspartate, 20-22 parts of rotten porch fertilizer,, 10-12 parts of rotten Chinese medicine residue, 15-18 parts of ammonium hydrogen carbonate, 2-4 parts of ferrous sulfate, 12-15 parts of phosphogypsum, 2-3 parts of methionine, 16-18 parts of rice chaff, 2-4 parts of catechol, 1-3 parts of acetylcholine, 0.1-0.2 part of sodium nitrophenolate, 20-25 parts of palm oil modified waterborne polyurethane emulsion, 3-5 parts of colloidal lithium magnesium silicate and 4-5 parts of auxiliaries; the catechol-containing polyurethane coated slow release compound fertilizer is extensive in raw material sources, multi-nutrient, and nutrient-rich, nutrients are doubly coated by the diatomite and a slow release coating agent in the production process, the fertilizer efficiency is long-lasting, crop resistance is strong, incidence of pests diseases and insect pests is low, and yield and quality are promoted.

Description

technical field [0001] The invention relates to the field of compound fertilizers, in particular to a polyurethane-coated slow-release compound fertilizer containing catechol. 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. How...

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