Spraying solution for planting of selenium-rich rice

Abstract

The invention discloses spraying solution for planting of selenium-rich rice. A preparation method of the spraying solution includes: 1) material preparation, to be more specific, preparing 100 parts of purified water, 1.5-2.5 parts of L-selenomethionine, 2.5-3.5 parts of a water-soluble compound fertilizer being 15-15-15 in NPK (nitrogen, phosphorus and potassium) and 0.5-1.0 part of hydroxyethyl cellulose; 2) mixing raw materials prepared at the step 1), adding into a steam explosion tank, heating to 150 DEG C at a pressure of 4MPa, keeping for 2min, quickly releasing the pressure in 1-3s to obtain slurry, performing inoculation of a well-cultured liquid bacillus subtilis strain at 25 DEG C according to a volume percent of 5-10%, adding into a fermentation tank, feeding sterile air into the fermentation tank, stirring for fermentation, quickly heating to 70 DEG C after fermentation is finished, keeping 0.5-1.0h, and inactivating to obtain the spraying solution.

Description

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

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