Cultivation method for quantitatively enriching organic selenium for black corn

Abstract

The invention discloses a cultivation method for quantitatively enriching organic selenium for black corn. The cultivation method comprises the following steps: spraying a selenium-enriched nutrient solution at a big flare stage, a heading stage and a filling stage of a growth phase of the black corn separately. The selenium-enriched nutrient solution is prepared from selenium-enriched fertilizerand water, and the selenium-enriched fertilizer is prepared from sodium selenite, monopotassium phosphate, magnesium sulfate and zinc sulfate heptahydrate. By use of the selenium enriching method, theblack corn can have higher, safe and controllable organic selenium content, selenium elements required by a human body are supplemented, the total selenium content is 0.35-4.0 mg/Kg, the organic selenium content is 0.25-3.1 mg/Kg, the daily selenium intake of the human body is satisfied, the yield and economic values of the black corn are increased, and wider prospects are provided for wide planting of the black corn in a northeast region.

Description

technical field [0001] The invention belongs to the technical field of agricultural production, and particularly relates to a method for cultivating black corn that can quantitatively enrich organic selenium according to requirements. Background technique [0002] Selenium is a trace element that occurs naturally in the earth's crust. In 1973, experts from the World Health Organization determined that selenium is one of the essential trace elements for human and animal life activities. Selenium widely exists in the internal organs of the human body. The lack of selenium in the body will lead to the occurrence of various diseases such as cardiovascular and cerebrovascular diseases, liver diseases, tumors, diabetes, Keshan disease, respiratory and digestive system diseases, especially for immune regulation, anti- The occurrence and development of various human diseases caused by biological functions such as oxidation and anti-mutation have direct and indirect effects. At pre...

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Problems solved by technology

[0005] The current selenium enrichment technology for agricultural products is not suitable for the black corn varieties widely planted in Northeast China. On the one hand, it cannot ensure the appropriate selenium content in black corn. If the content is too low, the effect of selenium enrichment cannot be achieved, and if it is too high, it will cause harm to the human body And it will cause problems such as environmental pollution; on the other hand, the existing selenium-rich technology is difficult to meet the requirements of the formation and storage of organic selenium in black corn to ensure its food safety