A method for safely planting double cropping rice in moderately and slightly polluted farmland

Abstract

The invention belongs to the crops plantation field, and specifically relates to a double-cropping rice safety plantation method in a medium-mild pollution farmland; the novel method can solve the technical problems that a conventional technical scheme cannot safely plant the double-cropping rice in a farmland polluted by copper, cadmium, lead, arsenic, and chromium at a medium-mild level; the novel method applies different passivating agents according to soils of different ph conditions; the passivating agent is preferably compounded, paddy rice breed selecting and water fertilizer regulation and control management technology are combined, so the copper, cadmium, lead, arsenic, and chromium content in the planted double-cropping rice can comply with the national foodstuff safety standard GB 2762-2012; the novel method is safe and reliable, and can continuously and effectively plant and produce the double-cropping rice in the copper, cadmium, lead, arsenic, and chromium medium-mild polluted farmland; the method is ecological and environmental protection, economic and effective, low in cost, high in universality, and can be massively promoted in usage.

Description

Technical field [0001] The invention belongs to the field of crop planting, and specifically relates to a method for safely planting double-season rice in farmland with moderate to light pollution. Background technique [0002] According to a report in the 2014 National Soil Pollution Bulletin, the country’s total soil point over-standard rate was 16.1%, of which the over-standard rate of cultivated soil points was as high as 19.4%. The country’s total soil over-standard rate was 16.1%. Inorganic pollution was the main type of pollution, followed by organic pollution. Compound pollution accounted for a smaller proportion. The number of inorganic pollutants exceeding the standard accounted for 82.8 of all over-standard points. %, the main inorganic pollutants include cadmium, copper, lead, chromium, zinc, nickel and other heavy metal elements and arsenic. There are nearly 20 million hectares of arable land polluted by heavy metals and arsenic in the country, accounting for about ...

AI Technical Summary

Problems solved by technology

However, the experimental condition of this research is the heavily polluted soil caused by the collapse of the tailings dam. The soil environment is highly specific and not universal; The management methods are quite different, and it is not worth popularizing and applying in the main rice producing areas where double-cropping rice is the mainstay in my country.

[0006] At the same time, the experimental results prove that the rice grown using the experimental conditions and techniques in the "Screening of Rice Varieties with Low Heavy Metal Accumulation and Chemical Improvement Technology of Paddy Fields" did not meet the national food safety standard GB 2762-2012

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