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Selenium potassium polyphosphate composite and application thereof

A technology of polyphosphoric acid and compound, applied in application, fertilizer mixture, fertilization device, etc., can solve problems such as unstable selenium content

Active Publication Date: 2007-08-15
SHENZHEN F&S BIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the growth conditions of different crops, growth time and space, climatic conditions and the choice of absorption function, drug concentration and human factors, etc., it is bound to lead to the disadvantage that the selenium content cannot be stabilized within a certain index.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The raw material is: 99. 999 % selenium powder, nitric acid, potassium carbonate, phosphoric acid (all reagents of analytical grade), purified water. The selenium powder is added into the reactor to react with 30% nitric acid, and the product is concentrated, filtered, dried and thermally decomposed to obtain high-purity selenium dioxide. Then dissolve in water to obtain selenous acid. Potassium carbonate powder and 85% phosphoric acid were weighed according to the mass ratio of 1.667 (ie, the molar ratio was 1.2:1). First dissolve potassium carbonate in pure water at a ratio of 1:2, then slowly add phosphoric acid under stirring to carry out neutralization reaction, and then dehydrate and dry. Potassium polyphosphate is produced at 400°C. Then weigh selenium dioxide and potassium polyphosphate according to the mass ratio of 5: 13 (that is, the molar ratio is 1.8: 1). First, selenium dioxide is hydrolyzed into selenous acid to obtain a selenous acid concentration of...

Embodiment 2

[0028] Application experiment: 1. Experiment location: Anxi Xianghua Baoye tea production base in Fujian Province.

[0029] Subject of the experiment: Tieguanyin tea tree.

[0030] Experimental methods and results: 30 grams of selenium potassium polyphosphate compound was dissolved in organic farmyard manure and used as root fertilizer for winter festivals in 16 mu of tea gardens. The quality of "Gaoshan Tieguanyin" tea produced in 2006 has been significantly improved. The tea taste is more mellow, sweet and fresh, with a clear aroma, which is resistant to brewing and has a strong aftertaste. The price of high-grade tea per catty increased from 400 yuan to 800 yuan.

[0031] Test results: In 2006, the selenium content of spring tea samples was 0.43mg / Kg when tested by Changsha Jinduan Technology, and the selenium content of autumn tea samples was 0.44mg / Kg when tested by Hunan Provincial Analysis and Testing Center, both of which reached the national standard (national The s...

Embodiment 3

[0033] Application experiment: 1. Experiment location: Danjiahe Village, Quanmin Township, Xiatuopu, Ningxiang County, Hunan Province.

[0034] Experimental object: Tyou 210 late indica rice.

[0035] Experimental method and results: 100 grams of selenium potassium polyphosphate compound, dissolved in 100 liters of water, is used as foliar fertilization for 2 mu of late rice. The rice plants grow tall and straight, lush. The rice ears are golden in color, the grains are plump, the rice quality is white, and the taste is soft and fragrant.

[0036] Test results: In 2006, the late rice was sampled at multiple points in the field and sent to the Hunan Provincial Analysis and Testing Center for testing. The result was that the selenium content was 6.5mg / Kg, which fully met the 1992 (GB13105-91) national standard "Hygienic Standards for Selenium Content in Food".

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Abstract

The invention discloses a polyphosphoric selenium and potassium composition as composite fertilizer, whose chemical formula is K3SeP3O10.XH2O (X=2-4). The invention can modify nano-selenium quantity of rapid-effective potassium-based enriched selenium fertilizer completely, which is adsorbed by plant obviously through additional bottom maturing or sprinkling on the leaf.

Description

technical field [0001] The invention relates to a selenium potassium polyphosphate compound and its application as a compound fertilizer rich in selenium, phosphorus and potassium. Background technique [0002] Selenium is one of the indispensable important elements in human life and physiological activities. The aging of the human body and the decline of immunity are mainly caused by the excessive presence of oxidative substances in the body. Selenium is an essential component for the synthesis of reducing agents in the human body, so it is beneficial to human health. Selenium deficiency in children can lead to the occurrence of various diseases and the decline of reproductive ability. According to relevant information, selenium can not only prevent and treat endemic diseases such as Keshan disease and Kaschin-Beck disease, but also prevent and treat various diseases such as tumors and cardiovascular and cerebrovascular diseases. Selenium can improve human body immunity ...

Claims

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Application Information

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IPC IPC(8): C05G1/00
Inventor 李福初
Owner SHENZHEN F&S BIO TECH
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