Modified polyglutamic acid-coated long-acting controlled-release compound fertilizer

Abstract

The invention relates to the field of compound fertilizers, in particular to a modified polyglutamic acid-coated long-acting controlled-release compound fertilizer. The fertilizer is prepared from the following raw materials in parts by weight: 10-15 parts of diatomite of 1,250-2000 meshes, 25-28 parts of urea, 6-8 parts of magnesium chloride, 15-18 parts of ammonium bicarbonate, 10-12 parts of sodium humate, 12-15 parts of coal ash, 4-6 parts of whey powder, 1-2 parts of lactobacillus plantarum, 4-6 parts of borax, 2-4 parts of ferrous sulfate, 15-18 parts of rice-washing water, 15-18 parts of thoroughly-decomposed animal excrement, 12-13 parts of zinc oxide, 13-15 parts of cane sugar residues, 5-7 parts of peppermint leaves and stems, 12-15 parts of polyglutamic acid, 4-5 parts of polyethylene glycol diglycidyl ether, 1-2 parts of sodium dodecylbenzene sulfonate, 1-3 parts of water-proofing powder, 3-5 parts of sandworm powder and 4-5 parts of an aid. The compound fertilizer is wide in the raw material source, and is rich and diverse in nutrients; and in a production process, the nutrients are doubly coated with the diatomite and a coating agent, so that the compound fertilizer has excellent and durable coating controlled-release control ability, moisture holding ability and drought resisting ability and lasts longer in the fertilizer effect, the soil activity is not lowered, the occurrence rate of crop pests is lowered, the crop yield can be increased remarkably, and the product quality can be improved remarkably.

Description

technical field [0001] The invention relates to the field of compound fertilizers, in particular to a modified polyglutamic acid-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