Soil-hardening-resisting growth-promoting sustained-release composite fertilizer

Abstract

The invention relates to the field of composite fertilizers, and concretely relates to a soil-hardening-resisting growth-promoting sustained-release composite fertilizer. The fertilizer is prepared from the following raw materials in parts by weight: 10-15 parts of 1250-2000 mesh diatomite, 23-25 parts of urea, 20-22 parts of ammonium bicarbonate, 10-12 parts of potassium dihydrogen phosphate, 10-12 parts of brewer's spent grains, 4-5 parts of fresh fish slag, 8-10 parts of calcium superphosphate, 6-8 parts of peanut straw, 1-2 parts of copper sulfate pentahydrate, 2-3 parts of zinc sulfonate heptahydrate, 1-3 parts of ferrous sulphate, 1-3 parts of fresh raw ginger juice, 6-8 parts of chitosan, 12-15 parts of gelatin, 4-5 parts of glycerin, 2-4 parts of starch, 5-6 parts of sodium alginate, 10-12 parts of acrylic acid, 0.1-0.2 parts of potassium persulphate and 4-5 parts of an auxiliary agent. The composite fertilizer is various in raw material kinds, comprehensive and rich in nutrients and low in preparation cost; dual cladding on nutrients is formed by utilizing diatomite and a degradable sustained-release agent in the production technology, the fertilizer is relatively durable in fertility and abundant in multiple organics, does not cause soil hardening after being used for a long time, enables crops to grow vigorously, and helps to realize continuous production-increasing output-increasing effects.

Description

technical field [0001] The invention relates to the field of compound fertilizers, in particular to an anti-hardening and growth-promoting 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. Howeve...

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