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Solid coated slow release selenium fertilizer and its preparation method

A technology of coated slow-release and selenium fertilizer, which is applied in the fields of fertilizer manufacturing, fertilizer and fertilizer manufacturing, can solve the problems of inconspicuous effective slow-release characteristics and high failure rate, achieve stable and sufficient supply for plant absorption and utilization, is conducive to maintenance, Realize the effect of fertilizer supply

Inactive Publication Date: 2012-06-27
SUZHOU SETEK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the defects of high failure rate and unobvious effective slow-release characteristics of existing soil-applied selenium-containing fertilizers, the present invention proposes a method for enhancing the utilization rate and slow-release performance of selenium-containing fertilizers by using coating technology

Method used

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  • Solid coated slow release selenium fertilizer and its preparation method
  • Solid coated slow release selenium fertilizer and its preparation method
  • Solid coated slow release selenium fertilizer and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Sodium selenite is used as the selenium source material, different proportions of fillers and film materials are selected, the selenium source material and fillers are fully mixed, and then dry granulated to make a granular fertilizer core, and then different proportions of the fertilizer core are made by drum coating. The coating material is sprayed onto the surface of the granular fertilizer core to obtain a solid slow-release selenium fertilizer. In the field test, after a growth cycle of 4-6 months, the biomass and average selenium content of the growing crops were counted to evaluate the utilization rate of selenium in the solid slow-release selenium fertilizer. The specific experimental results are shown in Table 1:

[0034] Table 1 takes sodium selenite as the experimental result of selenium source

[0035]

[0036]

Embodiment 2

[0038] Sodium selenate is used as the selenium source material, different proportions of fillers and film materials are selected, the selenium source material and fillers are fully mixed, and dry granulation is carried out to make granular fertilizer cores, and then the different proportions of the packaged fertilizers are coated by the drum coating method. The membrane material is sprayed onto the surface of the granular fertilizer core to obtain a solid slow-release selenium fertilizer. In the field test, after a growth cycle of 4-6 months, the biomass and average selenium content of the growing crops were counted to evaluate the utilization rate of selenium in the solid slow-release selenium fertilizer. The specific experimental results are shown in Table 2:

[0039] Table 2 takes sodium selenate as the experimental result of selenium source

[0040]

[0041]

Embodiment 3

[0043] Select selenium-containing ore powder with a selenium content of more than 1000 μg / kg, and use ammonia water as the selenium source material after crushing, select different proportions of fillers and film materials, fully mix the selenium source material and fillers, and then carry out dry process The granules are made into granular fertilizer cores, and then different proportions of coating materials are sprayed onto the surface of the granular fertilizer cores by a drum coating method to obtain solid slow-release selenium fertilizers. In the field test, after a growth cycle of 4-6 months, the biomass and average selenium content of the growing crops were counted to evaluate the utilization rate of selenium in the solid slow-release selenium fertilizer. The specific experimental results are shown in Table 3:

[0044] Table 3 takes sodium selenate as the experimental result of selenium source

[0045]

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Abstract

The invention discloses a solid coated slow release selenium fertilizer, which comprises selenium fertilizer particles, and is characterized in that the selenium fertilizer particles possess a core-shell structure, the core of the selenium fertilizer particles is a selenium-containing fertilizer core, the shell of the selenium fertilizer particles is a coating wrapped outside the selenium-containing fertilizer core. The slow release selenium fertilizer reduces the conditions that available selenium in soil is absorbed by other minerals or fixed by coprecipitation, possesses obvious slow release characteristics, enables selenium to be stably and fully absorbed and utilized by plants, reduces non bio-available selenium in soil and can effectively mitigate the risk of selenium pollution.

Description

technical field [0001] The invention relates to fertilizer manufacturing, in particular to a method for manufacturing a selenium-containing solid-coated slow-release fertilizer, and belongs to the field of fertilizers and fertilizer manufacturing. Background technique [0002] Selenium is an essential trace element for humans and animals. It has many important biological functions such as anti-oxidation, enhancing immunity, and promoting growth. At the same time, selenium is also a beneficial element for higher plants. Appropriate selenium supplementation can enhance the stress resistance of plants It can increase the accumulation of organic matter, realize the functionalization of selenium-enriched plants, increase production and improve quality, and other beneficial effects. my country is a large selenium-deficient country, and the selenium-deficient areas account for about 72% of the country's land area, and nearly 1 billion people are at risk of selenium deficiency. Die...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05D9/02
CPCC05D9/02C05G5/30C05G5/38C05F11/02
Inventor 李飞
Owner SUZHOU SETEK
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