A kind of rabbit hair modified polyurethane coated high-efficiency slow-release compound fertilizer

Abstract

The invention relates to the field of compound fertilizers, particularly a cony-hair-modified polyurethane coated high-efficiency slow-release compound fertilizer. The fertilizer is prepared from the following raw materials in parts by weight: 10-15 parts of 1250-2000-mesh kieselguhr, 11-12 parts of dry wormcast, 8-10 parts of clover stover, 10-12 parts of Lemna minor, 3-4 parts of coriander seed, 4-6 parts of sodium pyrophosphate, 2-4 parts of light calcium carbonate, 2-4 parts of ferrous sulfate, 6-8 parts of yellow seriflux, 8-10 parts of wood dust ash, 10-12 parts of calcium hydrogen phosphate dihydrate, 6-8 parts of dehydrated vegetable powder, 2-4 parts of white granulated sugar, 0.1-0.3 part of ammonium persulfate, 3-4 parts of zinc sulfate, 5-6 parts of cluster redpepper leaf, 1-3 parts of silane coupling agent KH550, 0.1-0.2 part of cony hair, 20-23 parts of water-based polyurethane emulsion and 4-5 parts of assistant. The compound fertilizer has the advantages of wide raw material sources and rich and multiple nutrients, and can enhance the activity of soil; in the aspect of the production technique, the kieselguhr and cony-hair-modified polyurethane coating agent are utilized to form dual coatings on the nutrients, and thus, have favorable enduring coating slow-release control capability, so that the nutrient release is enduring and efficient, and the utilization ratio of the fertilizer is high; and the compound fertilizer can obviously enhance the crop yield and improve the product quality.

Description

technical field [0001] The invention relates to the field of compound fertilizers, in particular to a high-efficiency slow-release compound fertilizer coated with rabbit hair modified polyurethane. 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 rat...

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