A modified starch ether coated long-acting slow-release compound fertilizer
A compound fertilizer and starch ether technology, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve the problems of mismatched crop growth requirements, unsatisfactory slow-release effects, and difficulty in meeting different needs, etc., to achieve excellent coating Slow-release control ability, improving the effect of single immobilization and preventing premature loss of nutrients
Inactive Publication Date: 2015-12-09
天津市蓟州区绿色食品发展中心
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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
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment
[0013] The compound fertilizer of the present embodiment is made from the following raw materials in parts by weight (kg): 1250 mesh diatomite 15, boron fertilizer 8, ammonium dihydrogen phosphate 20, potato pulp slag 15, plant ash 10, magnesium phosphate rock powder 6, chlorine Potassium chloride 12, potassium feldspar powder 6, cottonseed meal 12, brewer's grains 10, polypropylene fiber 2, starch ether 12, titanium dioxide 0.2, urea 20, dodecylbenzenesulfonic acid 6, auxiliary agent 5; the auxiliary agent consists of the following Raw materials in parts by weight: poultry feather 15, 40% sulfuric acid solution 35, appropriate amount of sodium hydroxide, keratinase 0.15, copper citrate 2, manganese citrate 1, zinc citrate 2, medical stone fine powder 22, silicon Sodium Acetate 5, the preparation method is as follows: first wash the poultry feathers with water, sterilize them at high temperature, and then pulverize them, put them into sulfuric acid solution, and hydrolyze them ...
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The invention relates to the field of composite fertilizers, and concretely relates to a modified-starch-ester coated long-acting 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, 6-8 parts of boron fertilizer, 18-20 parts of ammonium dihydrogen phosphate, 12-15 parts of potato pulp residue, 10-12 parts of plant ash, 4-6 parts of phosphorus-magnesium ore powder, 10-12 parts of potassium chloride, 4-6 parts of potassium feldspar powder, 12-15 parts of cottonseed meal, 8-10 parts of brewer's spent grains, 2-3 parts of polypropylene fiber, 10-12 parts of starch ester, 0.2-0.3 part of titanium dioxide, 18-20 parts of urea, 4-6 parts of dodecylbenzene sulfonic acid and 4-5 parts of an auxiliary agent. The composite fertilizer is abundant and comprehensive in nutrients and low in damage degree to soil because organic materials and inorganic materials are mixed for compounding; and dual cladding on nutrients is formed by utilizing diatomite and a modified-starch-ester coating agent in the production technology, so that premature loss of nutrients is effectively avoided, the fertilizer efficiency is relatively durable, and the output and the quality of crops are improved.
Description
technical field [0001] The invention relates to the field of compound fertilizers, in particular to a modified starch ether-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. Ho...
Claims
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IPC IPC(8): C05G3/00
Inventor 孙仁贵
Owner 天津市蓟州区绿色食品发展中心