Se-rich rice cultivation method

Abstract

The invention discloses a Se-rich rice cultivation method. The method comprises following steps: a nutrient solution is sprayed at the late tillering stage of rice until leaf surfaces are uniformly covered with the nutrient solution, and the nutrient solution is prepared with a method comprising steps as follows: 1), raw materials including 100 parts of pure water, 1.5-2.5 parts of L-selenomethionine and 0.5-1.0 part of hydroxyethyl cellulose are prepared; 2), the raw materials in the step 1) are mixed and then are ground into a thick liquid, the thick liquid is obtained, sterilized, cooled to 25 DEG C, and inoculated with 5%-10% by volume of bacillus subtilis liquid strains which are cultured to be mature, then the thick liquid is added to a fermentation cylinder, sterile air is introduced into the fermentation cylinder, the thick liquid is subjected to mixing fermentation, the temperature is rapidly increased to 70 DEG C after fermentation and kept for 0.5-1.0 h, the thick liquid is inactivated, and the nutrient solution is obtained.

Description

Technical field [0001] The invention relates to the technical field of rice planting, in particular to a method for cultivating selenium-rich rice rice. Background technique [0002] Rice is native to China. The seed of rice is rice, which is called rice or rice after the hull is removed. It is one of the main food crops in the world. Rice was grown in the Yangtze River valley in China seven thousand years ago. The sown area of ​​rice in China accounts for a quarter of the country's grain crops, and the output accounts for more than half. According to different methods, rice can be divided into indica and japonica rice, early rice and mid-late rice, glutinous rice and non-glutinous rice. The seeds of rice are rice, and the rice (grain) is called rice, fragrant rice, rice. Nearly half of the world's population feed on rice. The cultivation history has been 14000-18000 years. It is an important food crop that can be used to make starch, wine, and vinegar. Rice bran can be used...

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned prior art all uses inorganic selenium (selenate or selenite) as the selenium source of fertilizer, and the residual amount of inorganic selenium is large, and inorganic selenium has obvious poisonous effect to body, and safety is lower; The method of spraying inorganic selenium has the advantage that crops absorb quickly, but its disadvantages are also obvious. First, foliar spraying requires a relatively high content of selenium fertilizer, such as CN1382374A, selenic acid or selenous acid in selenium-enriched plant nutrition regulator The content of salt is 4-25%, high concentration of selenium fertilizer increases the cost of fertilizer