Planting method of selenium-enriched rice

Abstract

The invention discloses a planting method of selenium-enriched rice, and relates to the technical field of grain planting. Selenium-enriched soil of which the selenium content is 0.5-1.0 mg / kg is selected, and cultivation is conducted. The planting method mainly includes the steps of soil preparing, seed selecting and soaking, seedling raising and transplanting and field managing. The field managing process includes the steps of fertilization operation and weeding operation. The fertilization operation includes the steps that 5-7 days after throwing planting, 25 kg of 45% composite fertilizer special for rice is applied as in tillering fertilizer every 667 m<2> of farmland, organic selenium-enriched fertilizer with the concentration of 3-5 mg / L is sprayed on leaf surfaces in a booting stage, and 15 days after head sprouting, the organic selenium-enriched fertilizer with the concentration of 1-2 mg / L is sprayed on the leaf surfaces. According to the planted rice, the yield is relatively high, the moisture is moderate, pesticide residues are few, and the selenium content of the planted rice is stable and higher than that of normal rice, can reach 120-180 micrograms per kilogram, and is lower than a national food sanitary selenium limit standard of 300 micrograms per kilogram.

Description

technical field [0001] The invention relates to the technical field of grain planting, in particular to a method for planting selenium-enriched rice. Background technique [0002] Selenium is a chemical element first discovered by Swiss chemist Berzelius in 1817. It has been recognized by the World Health Organization as one of the essential nutrients for living organisms. Selenium is a multifunctional nutrient element, which has the functions of scavenging free radicals in the body, resisting membrane lipid peroxidation, preventing aging, and preventing cancer. In my country, 72% of the population in 22 provinces and autonomous regions live in low-selenium or selenium-deficient areas. Selenium deficiency or excess will cause various diseases in people, and it is necessary to supplement selenium scientifically. [0003] Part of the cultivated land in my country has been detected to be rich in selenium. These cultivated lands can be used for farming to grow selenium-rich cr...

AI Technical Summary

Problems solved by technology

There have been many domestic reports on the production of selenium-enriched rice using a natural selenium-enriched environment, but its stability is uncontrollable, and there are the following problems: 1. The absorption capacity of rice to selenium is very weak, and selenium easily forms a form that is not conducive to rice absorption in water. 2. Natural factors are uncontrollable, too much rainfall will affect the absorption of selenium by rice