Humic-acid-containing modified-starch-coated slow-release fertilizer and preparation method thereof

Abstract

A provided humic-acid-containing modified-starch-coated slow-release fertilizer comprises the following compositions in parts by weight: 75-85 parts of urea, 2-5 parts of potassium superphosphate, 1-3 parts of sodium hydroxide, 3-9 parts of N,N'-methylenebisacrylamide, 1-5 parts of ammonium sulfate, 2-6 parts of ammonium chloride, 1-4 parts of potassium dihydrogen phosphate, 2-6 parts of deionized water, 2-8 parts of microcrystalline wax, 1-5 parts of collophane powder, 2-8 parts of sodium alginate, 6-12 parts of modified starch, 3-9 parts of cellulose derivative, 1-3 parts of humic acid, 2-6 parts of acrylic acid, 3-8 parts of copper potassium pyrophosphate, and 2-6 parts of ammonium polyacrylate. According to the technical scheme, the nutrient release rate of the coated slow-release fertilizer is alleviated, the water retention capability of soil is improved, also the coated slow-release fertilizer is degradable, low in cost, and suitable for large-scale popularization and usage.

Description

technical field [0001] The invention relates to the technical field of fertilizer and its manufacture, in particular to a modified starch-coated slow-release fertilizer containing humic acid. Background technique [0002] At present, as human beings pay more and more attention to the environment, health and sustainable use of natural resources, it is an important task for the current technological innovation of agricultural fertilizers to minimize fertilizer loss and improve fertilizer utilization while ensuring food production. It is also an important guarantee for the sustainable development of agriculture. [0003] Slow-release fertilizers meet the requirements of environmental protection and sustainable agricultural development, and are the development direction of agricultural fertilizers in the world, among which coated slow-release fertilizers will be the mainstream of slow-release fertilizers in the future. However, the coatings of the existing coating-type slow-rel...

AI Technical Summary

Problems solved by technology

However, the coatings of existing coated slow-release chemical fertilizer products are useless to crops, and most of them cannot be degraded by the environment and will remain in the soil to pollute the environment, such as epoxy resin, polyurethane, polyethylene, polypropylene, etc.

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