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Controlled-release zinc magnesium selenium phytate fertilizer and preparation method thereof

A zinc phytate and selenium fertilizer technology, applied in the direction of fertilizer form, fertilization device, fertilizer mixture, etc., can solve the problems of soil and environmental pollution, failure to store trace elements, increase labor intensity, etc.

Inactive Publication Date: 2012-02-08
蔡瑞琳 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But, the microelement fertilizer that existing preparation method makes, has only in crop specific growth period application, although described microelement can be stored in the fruit of crop, has increased labor intensity; , with the growth of crops, the trace elements that have been absorbed by the crops will also be lost from the crops, failing to achieve the purpose of maximally storing trace elements in the fruits of the crops
At present, most of the fertilizer coating agents used in the market are organic compounds and polymers, which will more or less pollute the soil and the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The preparation method of controlled-release type zinc-magnesium-selenium phytate fertilizer comprises the following process steps:

[0035] 1) Dissolving 8 parts by weight of phytic acid and 0.001 parts by weight of selenous acid in 30 parts by weight of water to prepare an aqueous solution, and heating to 35°C;

[0036] 2) Under stirring (continuous stirring for 30 min), 8 parts by weight of zinc oxide and 10 parts by weight of magnesium oxide were sequentially added to the aqueous solution prepared in step 1), and the reaction temperature was maintained at 40°C for 5 hours of reaction. Add potassium hydroxide in the process, make the pH value of reactant maintain on 5;

[0037] 3) 8 parts by weight of potassium magnesium chloride and 10 parts by weight of superphosphate were mixed and stirred uniformly (continuously stirred for 30 min) to obtain a mixture, then, the product obtained in step 2) was added to the mixture and stirred uniformly ( Stir continuously for 30...

Embodiment 2

[0043] The preparation method of controlled-release type zinc-magnesium-selenium phytate fertilizer comprises the following process steps:

[0044]1) Dissolving 15 parts by weight of phytic acid and 0.05 parts by weight of selenous acid in 105 parts by weight of water to prepare an aqueous solution, and heating to 65°C;

[0045] 2) Under stirring (continuous stirring for 60 min), add 40 parts by weight of zinc oxide and 30 parts by weight of magnesium oxide to the aqueous solution prepared in step 1) in sequence, maintain the reaction temperature at 85 ° C, and react for 2 hours. Add potassium hydroxide in the process, make the pH value of reactant maintain on 7;

[0046] 3) 30 parts by weight of potassium magnesium chloride and 40 parts by weight of calcium superphosphate were mixed and stirred uniformly (continuously stirred for 60 min) to obtain a mixture, then, the product obtained in step 2) was added to the mixture and stirred uniformly ( Stir continuously for 60min); ...

Embodiment 3

[0052] The preparation method of controlled-release type zinc-magnesium-selenium phytate fertilizer comprises the following process steps:

[0053] 1) 12 parts by weight of phytic acid and 0.025 parts by weight of selenous acid are dissolved in 68 parts by weight of water to prepare an aqueous solution, and heated to 50°C;

[0054] 2) Under stirring (continuously stirring for 45 minutes), 24 parts by weight of zinc oxide and 20 parts by weight of magnesium oxide were sequentially added to the aqueous solution prepared in step 1), and the reaction temperature was maintained at 63°C for 3.5 hours. Potassium hydroxide is added during the reaction process of the step 2), so that the pH value of the reactant is maintained at 6;

[0055] 3) 18 parts by weight of potassium magnesium chloride and 25 parts by weight of calcium superphosphate were mixed and stirred uniformly (continuous stirring for 45min), to obtain a mixture, then, the product obtained in step 2) was added to the mixt...

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Abstract

The invention discloses a controlled-release zinc magnesium selenium phytate fertilizer and a preparation method thereof. The fertilizer is prepared by the method which comprises the following steps: firstly, dissolving a phytic acid and a selenious acid in water to prepare aqueous solution and heating the aqueous solution; secondly, orderly adding zinc oxide and magnesium oxide into the preparedaqueous solution with stirring to perform reaction at the temperature of 40 to 85 DEG C for 2 to 5 hours; thirdly, mixing and uniformly stirring magnesium potassium chloride and calcium superphosphate to obtain a mixture, adding the product prepared in the former step into the mixture and uniformly stirring the mixture; and finally, granulating, drying and coating the obtained product to obtain finished products. The fertilizer can be simultaneously applied together with a basal fertilizer, meets the multiple-absorption requirements of crops, decreases labor intensity, and fulfills the aim ofmaximally storing the trace elements in fruits of the crops and meets the requirements of human bodies or animal bodies on the intake of trace elements because the trace elements in the fertilizer can be released after the fertilizer is applied for a certain time.

Description

technical field [0001] The invention relates to a fertilizer containing various trace elements, in particular to a controlled-release zinc-magnesium-selenium phytate fertilizer and a preparation method thereof. Background technique [0002] With the development of my country's chemical industry, various types of fertilizers emerge in endlessly. Now, the cultivation of crops requires more and more fertilizers, and people hope that the crops can contain beneficial trace elements—zinc, magnesium, and selenium, so that the trace elements can be provided for human or animal bodies. But, the microelement fertilizer that existing preparation method makes, has only in crop specific growth period application, although described microelement can be stored in the fruit of crop, has increased labor intensity; , along with the growth of crops, the trace elements that have been absorbed by the crops will also be lost from the crops, failing to achieve the purpose of maximally storing tra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G5/00C05G3/00
Inventor 蔡瑞琳张常顺
Owner 蔡瑞琳
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