Method for continuously producing safe late japonica rice on farmland with soil mildly and moderately contaminated by soil heavy metals

Abstract

The invention belongs to the technical field of crop science, particularly relates to a technical method for continuously producing safe late japonica rice on farmland with soil mildly and moderately contaminated by the soil heavy metals of cadmium, lead and arsenic in the Tai Lake basin rice area. The method comprises screening and verification of genetype varieties of rice, wherein genetype varieties of rice, of which the contents of Cd, As and Pb in seeds are relatively lower and the agronomic character and the rice quality are excellent, are screened out according to the general performance of various genetypes under mild contamination conditions of general comparison fields and moderate contamination conditions of manually added heavy metals; silicon fertilizer capable of remarkably refraining accumulation of rice heavy metals can be applied in combination to the screened-out genetype varieties of rice so as to realize continuous production of safe late japonica rice on the farmland with soil mildly and moderately contaminated by the soil heavy metals. The invention aims to provide an ecological, environment-friendly, economical, effective and low-cost method for continuously producing safe late japonica rice on the farmland with soil mildly and moderately contaminated by soil heavy metals.

Description

technical field [0001] The invention belongs to the technical field of crop science, and in particular relates to a technical method for continuously producing safe late japonica rice on farmland with mild to moderate pollution of soil heavy metals, cadmium, lead, and arsenic. Background technique [0002] With the increase of industrial "three wastes" emissions and the intensification of agricultural non-point source pollution, the problem of heavy metal pollution in rice paddy soil around the world is becoming more and more serious, resulting in serious problems such as soil productivity decline, agricultural product pollution and ecological environment damage, which have become obstacles to agricultural production. One of the main factors for sustainable and efficient development, and more seriously, these toxic heavy metals in the soil can be absorbed by rice and accumulate in the grains, and enter the human body through the food chain, thereby threatening the health of u...

AI Technical Summary

Problems solved by technology

The basis of phytoremediation is that specific plants can accumulate high levels of toxic heavy metals in the upper parts. However, except for a few heavy metals such as Zn and Ni, which can be used in production practice, there are no ideal hyperaccumulator plants for other heavy metals. The application still has a large distance

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