Once-applied efficient sustained-release composite base fertilizer

Abstract

The invention relates to the field of composite fertilizers, and concretely relates to a once-applied efficient sustained-release composite base fertilizer. The fertilizer is prepared from the following raw materials in parts by weight: 10-15 parts of 1250-2000 mesh diatomite, 15-18 parts of dry cattle manure, 8-10 parts of rice bran, 20-22 parts of urea, 15-18 parts of monoammonium phosphate, 8-10 parts of calcium superphosphate, 2-3 parts of vegetable gelatin, 1-3 parts of animal gelatin, 1-2 parts of basalt powder, 10-12 parts of potassium chloride, 6-8 parts of black soil, 1-2 parts of copper sulfate, 2-4 parts of zinc sulfate, 4-5 parts of pinus massoniana needles, 12-15 parts of pregelatinized cassava starch, 6-8 parts of polyvinyl alcohol, 4-5 parts of glycerol, 0.1-0.2 part of high-activity zinc oxide, 3-5 parts of magnesium sulfate, 1-2 parts of egg shells and 4-5 parts of an auxiliary agent. The composite fertilizer is wide in raw material sources, low in cost and sufficient in fertility; dual cladding on nutrients is formed by utilizing an efficient sustained-release coating agent prepared from diatomite and multiple film easily-forming raw materials in the preparation technology, so that the fertility is relatively durable, and noneffective loss of nutrients is avoided; and the composite fertilizer is capable of satisfying growth requirements of crops after being applied once, and helps to greatly simplify plantation cost.

Description

technical field [0001] The invention relates to the field of compound fertilizers, in particular to a high-efficiency slow-release compound base fertilizer for one-time application. 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