Selenium-enrichment rice cultivation technology

Abstract

The invention discloses a selenium-enrichment rice cultivation technology. The technology is implemented as follows: a nutrient solution is sprayed at the last stage of rice tillering, wherein leaf surfaces need to be covered uniformly by the solution. The nutrient solution is prepared as follows: (1), raw materials are prepared; to be specific, 100 parts of purified water, 1.5 to 2.5 parts of L-selenomethionine, 2.5 to 3.5 parts of water-soluble compound fertilizer with the NPK proportion of 15 to 15 to 15, and 0.5 to 1.0 part of hydroxyethyl cellulose; (2), after mixing of the raw materials prepared at the step (1), the mixed raw materials are placed into a pressure tank, pressurization is carried out to reach 4kg / cm<2> and the pressure is kept to be uniform for 2 to 3min, and then the pressure returns to a normal pressure within 1 to 3s to obtain serous fluid; liquid bacillus subtilis spawn with maturation is introduced into the serous fluid based on a percent by volume of 5 to 10% at a temperature of 25 DEG C, the mixture is placed into a fermentation cylinder, sterile air is guided into the fermentation cylinder, stirring and fermentation are carried out; and after fermentation completion, the temperature rises to 70 DEG C rapidly and the temperature is kept for 0.5 to 1.0h for inactivation, thereby obtaining the nutrient solution.

Description

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

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