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Method for preparing alginic acid pore-sealing type sustained release ecological fertilizer

A technology of alginic acid and ecological fertilizer, which is applied in the direction of ammonium orthophosphate fertilizer, alkaline orthophosphate fertilizer, nitrogen fertilizer, etc., can solve the problems of residual pollutants and high cost of slow-release chemical fertilizers, and achieve optimized soil structure and natural pollution-free soil Micro-ecological, active effect

Active Publication Date: 2016-04-13
ANHUI GUMEI ECOLOGICAL AGRI TECH CO LTD
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Problems solved by technology

[0007] The purpose of the present invention is to provide a preparation method of alginic acid-sealed slow-release ecological fertilizer, solve the problems of high cost of slow-release chemical fertilizers, residual pollutants, etc., and obtain a long-lasting fertilizer effect and environmentally friendly compound ecological fertilizer

Method used

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  • Method for preparing alginic acid pore-sealing type sustained release ecological fertilizer

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example 1

[0024] (1) Take 3 parts by weight of fly ash and 7 parts by weight of diatomaceous earth, together with the dispersant sodium silicate solution, add them to a low-speed mixer, stir and disperse for 1 hour at a temperature not higher than 30°C, and then add 50 Parts by weight of urea, 15 parts by weight of monoammonium phosphate and ethyl orthosilicate, continue to stir for 0.5h; the stirring speed is not greater than 40r / min;

[0025] (2) Dissolve 15 parts by weight of alginic acid in sodium hydroxide solution to prepare a sodium alginate solution, add 5 parts by weight of calcium carbonate powder, stir and mix at high speed for 10 minutes, and then add it to the mineral-adsorbed fertilizer solution obtained in step (1) , continue to stir for 5 to 10 minutes, and after standing for 60 minutes, obtain a fertilizer slurry sealed with gelled calcium alginate; the concentration of the prepared sodium alginate solution is 10 g / L, and the stirring speed is 300 r / min;

[0026] (3) Su...

example 2

[0028] (1) Take 5 parts of fly ash and 3 parts of attapulgite, add them to a low-speed mixer together with a dispersant, stir and disperse for 2 hours at a temperature not higher than 30°C, and then add 30 parts of urea and 20 parts of calcium phosphate parts, 15 parts of potassium sulfate and ethyl orthosilicate, continue to stir for 0.5h; wherein, the dispersant is sodium tripolyphosphate, the mass concentration is 15-25%, and the amount of dispersant added is 5 times of the mass of porous mineral powder ; The amount of tetraethyl orthosilicate is 1% of the fertilizer mass; the stirring speed is not greater than 40r / min;

[0029] (2) Dissolve the alginic acid in sodium hydroxide solution to prepare sodium alginate solution, add calcium carbonate powder, stir and mix at high speed for 20 minutes, then add the mineral fertilizer obtained in step (1), and continue stirring for 10 minutes , after standing for 30min, obtain the fertilizer slurry sealed by gelled calcium alginate;...

example 3

[0032] (1) Take 5 parts of bentonite and 5 parts of diatomaceous earth, add them to a low-speed mixer together with a dispersant, stir and disperse for 1.5 hours at a temperature not higher than 30°C, and then add 40 parts of monoammonium phosphate, disulfuric acid 35 parts of potassium hydrogen and ethyl orthosilicate, continue stirring for 0.5h; wherein, the dispersant is sodium hexametaphosphate, the mass concentration is 25%, and the amount of dispersant added is 10 times of the quality of porous mineral powder; The amount of ethyl ester added is 1% of the fertilizer mass; the stirring speed is not greater than 40r / min;

[0033] (2) Dissolve the alginic acid in a sodium hydroxide solution to prepare a sodium alginate solution, add calcium carbonate powder, stir and mix at a high speed for 15 minutes, then add the fertilizer solution obtained in step (1) by mineral adsorption, and continue stirring for 10 minutes , after standing for 60min, obtain the fertilizer slurry seal...

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Abstract

The invention relates to a method for preparing alginic acid pore-sealing type sustained release ecological fertilizer. A compound fertilizer, porous minerals, alginic acid, chitosan and calcium carbonate serve as main raw materials for the ecological fertilizer, a porous inorganic powder material serves as a carrier to adsorb the fertilizer, alginates are gelated on the inner surface and outer surface of an inorganic material to form a micro membrane, and thus micropores are sealed to obtain the sustained release ecological fertilizer. The prepared pore-sealing type sustained release ecological fertilizer has the advantages of being good in sustained release property, environmentally friendly and optimized in process.

Description

technical field [0001] The invention relates to a preparation method of a compound ecological fertilizer, in particular to a preparation method of a porous mineral adsorption slow-release ecological fertilizer sealed with alginic acid. Background technique [0002] Fertilizer is one of the most important means of production in agricultural production. According to the estimates of the Food and Agriculture Organization of the United Nations (FAO), the application of chemical fertilizers can increase the yield of food crops by 55% to 57%, and increase the total output by 30% to 31%. Among them, 55% comes from the effect of chemical fertilizers. The relationship between my country's fertilizer input and food also conforms to this law. With the development of high-yield, high-efficiency, and high-quality agriculture, the status of chemical fertilizers in agriculture will become more important. [0003] The practice of agricultural production shows that due to the rapid increase...

Claims

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Application Information

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IPC IPC(8): C05G3/00
CPCC05B1/02C05G3/00C05G5/30C05B7/00C05B17/00C05C9/00C05D1/02C05D9/00
Inventor 陈庆曾军堂叶任海陈兵
Owner ANHUI GUMEI ECOLOGICAL AGRI TECH CO LTD
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