Selenium-enriched rice planting method

Abstract

The invention discloses a selenium-enriched rice planting method. The method includes the following steps that a nutrient solution is sprayed in the later tillering stage of rice until the leaf surface is uniformly covered with the nutrient solution, and the nutrient solution is prepared from the following preparing method including the steps that 1, raw materials are prepared, wherein 100 parts of purified water, 1.5-2.5 parts of L-selenomethionine and 0.5-1.5 parts of hydroxyethyl cellulose are prepared; 2, after being mixed, the raw materials in the step 1 are put into a steam bursting tank at the pressure of 4MPa, the materials are heated to 150 DEG C and kept at the temperature for 2 min, then pressure is fast released within 1-3 s to obtain slurry, the slurry is inoculated with bacillus subtilis liquid strain cultured to be mature according to the volume ratio of 5% at the temperature of 25 DEG C, the mixture is put into a fermentation tank, sterile air is introduced into the fermentation tank, stirring is carried out for fermentation at the stirring speed of 250 r / min, the fermentation time is 3 h, the temperature is kept at 35-37 DEG C, and after fermentation is finished, the temperature is rapidly raised to 70 DEG C and kept for 0.5 h to carry out inactivation to obtain the nutrient solution.

Description

technical field [0001] The invention relates to the technical field of rice planting, in particular to a method for planting selenium-enriched rice. Background technique [0002] Paddy rice, originating in China, the fruit of paddy rice is paddy rice, claims rice or rice after shelling, is one of main food crops in the world. Rice was grown in the Yangtze River Basin in China 7,000 years ago. China's rice sowing area accounts for 1 / 4 of the country's grain crops, while the output accounts for more than half. According to different methods, rice can be divided into indica rice and japonica rice, early rice and middle and late rice, glutinous rice and non-glutinous rice. The fruit of rice is paddy, and paddy (grain) is called rice, fragrant rice, and rice after shelling. Nearly half of the world's population feeds on rice. The cultivation history has been 14000-18000 years. As an important food crop, it can be used for starch production, wine making and vinegar production...

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