Multifunctional selenium-enriched controlled-release special fertilizer for rice

Abstract

The invention provides a multifunctional selenium-enriched controlled-release special fertilizer for rice. The fertilizer is prepared from the following raw materials in parts by weight: 80-200 parts of 3% chitosan coated compound fertilizer, 200-450 parts of 4% chitosan coated compound fertilizer, 50-350 parts of 5% chitosan coated compound fertilizer, 50-200 parts of sulphur water soluble polymer double coated urea, 50-150 parts of potassium chloride, 50-260 parts of monoammonium phosphate, 30-70 parts of sodium selenite, 5-20 parts of EDTA (Ethylene Diamine Tetraacetic Acid) Chelating zinc, 8-30 parts of calcium magnesium phosphate fertilizer and 2-15 parts of borax. The fertilizer provided by the invention is reasonable in proportion of nutrients. By adopting chitosan as a coating material and adding microelements such as silicon and zinc, the cultivation of resilience of rice is enhanced, and the yield-increasing effect is remarkable. As the element selenium is added, the quality of rice products is remarkably improved. The fertilizer is applied once without topdressing all over the year, thereby saving labor and effort.

Description

technical field [0001] The invention relates to the technical field of functional fertilizers, in particular to a special fertilizer for multifunctional selenium-enriched slow-release rice. Background technique [0002] Selenium is one of the 14 essential trace elements for the human body. It is known as "the fire of life", "the patron saint of the heart" and "the king of anti-cancer". Recognition ability, improve the synthesis of immune system cell antibodies, the proliferation of T cells, the level of antibodies in the blood, and double the phagocytosis and bactericidal ability of macrophages, thereby enhancing the immune function of the human body. Animal experiments have found that selenium can reduce the acute injury of aflatoxin B1, reduce the degree of hepatic central lobular necrosis and mortality. Selenium has a strong affinity with certain heavy metal elements, and combines with metals such as mercury and cadmium in the body to form metal selenoprotein complexes t...

AI Technical Summary

Problems solved by technology

[0004]1. Increase the cost of fertilizer use, because foliar spraying requires a relatively high content of selenium fertilizer, such as in the Chinese patent CN ZL01144575.0 "Selenium-enriched Plant Nutrition Regulator" The content of selenic acid or selenite is 4-25%;

[0005]2. Pollution of soil and water sources, because foliar fertilizer spraying can easily cause selenium fertilizer to fall into the ground, which will easily cause certain pollution to field runoff water and soil;

[0006]3. Poor safety, foliar fertilization easily leads to large residual amount of inorganic selenium, inorganic selenium has obvious poisonous effect on crops, and the safety is low

my country's traditional fertilizer products focus on the development of nutrient functions, but the application of fertilizers with a single nutrient function is difficult to overcome a series of problems such as soil continuous cropping obstacles, low water production efficiency, and environmental pollution under the current intensive agricultural conditions

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