Spraying liquid for selenium-enriched rice paddy planting

Abstract

The invention discloses spraying liquid for selenium-enriched rice paddy planting. A preparation method of the spraying liquid includes the steps that 1, during raw material preparation, 100 parts of purified water, 1.5-2.5 parts of L-selenomethionine, 2.5-3.5 parts of water-soluble compound fertilizer with NPK being 15-15-15 and 0.5-1 part of hydroxyethyl cellulose are prepared; 2, the raw materials in step1 are mixed and put into a high-pressure tank to be pressurized to 4 kg / cm<2> so that pressure of the raw materials can be kept uniform for 2-3 minutes, then, normal pressure is restored within 1-3 seconds, slurry is obtained and inoculated into a maturely cultivated bacillus subtilis liquid strain according to the 5-10% volume percentage at the temperature of 25 DEG C to be put into a fermentation tank, sterile air is injected into the fermentation tank for stirring fermentation, after fermentation is ended, temperature is rapidly increased to 70 DEG C to be kept for 0.5-1.0 h, and finally the spraying liquid is obtained after inactivation.

Description

technical field [0001] The invention relates to the technical field of rice planting, in particular to a selenium-enriched rice planting spray liquid. 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 producti...

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