Nutrient solution for cultivating selenium-rich rice

Abstract

The invention discloses nutrient solution for cultivating selenium-rich rice. A method for preparing the nutrient solution includes 1), preparing raw materials including 100 parts of purified water, 1.5-2.5 parts of L-selenomethionine and 0.5-1.0 part of hydroxyethyl celluloses; 2), mixing the raw materials prepared at the step 1) with one another to obtain mixtures, placing the mixtures in a steam explosion tank under the pressure of 4 MPa, heating the mixtures until the temperatures of the mixtures reach 150 DEG C, keeping the temperatures of the mixtures unchanged for 2 min, then quickly releasing the pressure within 1-3 s to obtain serous fluid, inoculating cultured mature bacillus subtilis liquid strains into the serous fluid at the temperature of 25 DEG C according to a volume percent of 5-10%, placing the serous fluid and the bacillus subtilis liquid strains in a fermentation tank, filling the fermentation tank with sterile air, stirring and fermenting the serous fluid and the bacillus subtilis liquid strains to obtain products, quickly increasing the temperatures of the products until the temperatures reach 70 DEG C after the serous fluid and the bacillus subtilis liquid strains are completely fermented, keeping the temperatures unchanged for 0.5-1.0 h and inactivating the products to obtain the nutrient solution.

Description

technical field [0001] The invention relates to the technical field of rice planting, in particular to a nutrient solution 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...

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