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Controlled-release selenium fertilizer and preparation method thereof

A production method and technology of selenium fertilizer, which are applied to fertilization devices, fertilizer mixtures, layered/coated fertilizers, etc., can solve the problems of product surface residue, low safety, and high labor costs, achieve long fertilizer effect period, and reduce labor costs. , the effect of high safety

Active Publication Date: 2016-03-30
中山市天颐商业投资管理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the entire growth period, foliar spraying needs to be carried out 5 to 6 times, and the labor cost is relatively high; foliar spraying of sodium selenite still has product surface residues, and the safety is low
Soil application of sodium selenite fertilizer has a short effect, and it needs to be used multiple times, or combined with foliar spraying of sodium selenite solution, in order to achieve the purpose of producing selenium-enriched agricultural products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A preparation method of slow-release selenium fertilizer, the steps are as follows:

[0020] (1) 25 parts of β-cyclodextrin or starch, add 100 parts of water, heat and stir until the solution is gelatinized;

[0021] (2) 1 part of selenite, 2-3 parts of phenylethylphenol polyoxyethylene ether, heating and stirring;

[0022] (3) Add 1.5 parts of the product of step (2), sodium lignosulfonate, to β-cyclodextrin or gelatinized starch, and finally add 2 parts of formaldehyde, stir evenly, and bathe in water at 80°C for 1 hour;

[0023] (4) drying the product of step (3) at 108° C. for 6-8 hours;

[0024] (5) Grinding and sieving the product of step (4) to collect 180-250 μm capsules;

[0025] ⑹ 12 parts of polyvinyl alcohol, 4 parts of bentonite, 100 parts of water, heating and stirring;

[0026] (7) Mix the products of step (5) and step (6), pass through a sieve with a diameter of 250 μm to granulate, dry, grind, sieve, and compress with a YP-1400 tablet machine.

[00...

Embodiment 2

[0030] A preparation method of slow-release selenium fertilizer, the steps are as follows:

[0031] (1) 25 parts of β-cyclodextrin, add 100 parts of water, heat and stir until the solution is gelatinized;

[0032] (2) 1 part of selenite, 2-3 parts of phenylethylphenol polyoxyethylene ether, heating and stirring;

[0033] (3) Add 1.5 parts of the product of step (2), sodium lignosulfonate, to β-cyclodextrin or gelatinized starch, and finally add 2 parts of formaldehyde, stir evenly, and bathe in water at 80°C for 1 hour;

[0034] (4) drying the product of step (3) at 108° C. for 6-8 hours;

[0035] (5) Grinding and sieving the product of step (4) to collect 180-250 μm capsules;

[0036] ⑹ 12 parts of polyvinyl alcohol, 4 parts of bentonite, 100 parts of water, heating and stirring;

[0037] (7) Mix the products of step (5) and step (6), pass through a sieve with a diameter of 250 μm to granulate, dry, grind, sieve, and compress with a YP-1400 tablet machine.

[0038] Determ...

Embodiment 3

[0051] The slow-release selenium fertilizer prepared in rape application embodiment 1 and embodiment 2

[0052] Location: Experimental Practice Base of East Campus of Tianjin Agricultural University

[0053] Selenium content of rapeseed: 0.040mg / kg (apply 80mg per square meter, calculated as sodium selenite), according to the DB6124.01-2010 classification standard for selenium content of selenium-enriched foods, selenium-enriched fresh vegetables 0.01-0.10mg / kg, belong to Selenium-rich vegetables.

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PUM

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Abstract

The invention relates to a preparation method of a controlled-release selenium fertilizer. The preparation method comprises the following steps: (1) heating beta-cyclodextrin or starch and water in a weight ratio of 1:(3-5), and performing stirring until the solution is gelatinized; (2) heating selenite and styrylphenol polyoxyethylene ether, and performing stirring; and (3) adding a product of the step (2) and sodium lignin sulfonate into beta-cyclodextrin or gelatinized starch, and then adding polyvinyl alcohol and bentonite for mixing and tabletting. According to the preparation method of the controlled-release selenium fertilizer, provided by the invention, beta-cyclodextrin or starch wrapping is performed at first, then active ingredients are effectively sealed for safekeeping, and then particles are embedded together with polyvinyl alcohol and bentonite to realize controlled release.

Description

technical field [0001] The invention belongs to the field of fertilizer production, in particular to a method for preparing slow-release selenium fertilizer. Background technique [0002] Selenium is an essential trace element for the human body. It has important functions such as enhancing the body's antibody antigens, enhancing immunity, increasing the production of immunoglobulins, enhancing metabolism, and preventing and fighting cancer. At present, there are more than 40 countries and regions in the world suffering from selenium deficiency in varying degrees, and about 72% of my country's regions have selenium deficiency in varying degrees. [0003] At present, there are two main methods for producing selenium-enriched agricultural products: one is the method of foliar spraying, spraying sodium selenite solution or biological selenium-enriched foliar fertilizer, and the other is soil application of sodium selenite. During the whole growth period, foliar spraying needs ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05D9/02
CPCC05D9/02C05G5/30
Inventor 冯涛方志成黄治强黄宗海卢兴霞梁发辉崔雁黎
Owner 中山市天颐商业投资管理有限公司
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