Method for reducing arsenic accumulation in rice grains

Abstract

The invention discloses a method for reducing arsenic accumulation in rice grains. The method comprises the following steps: (1) adding bio-organic fertilizer to soil, adding methionine and glutamic acid which are adopted as methyl donors, anatase titanium dioxide and rutile titanium dioxide, and performing deep tillage on the soil; and (2) then adding biochar and bentonite, performing plowing andmixing on surface soil, performing aging for 20 days, and adding base fertilizer, wherein in terms of bentonite, a sulfur-containing compound is dissolved in water so as to obtain a sulfur-containingsolution with a sulfur mass percentage of 5% to saturation, the sulfur-containing solution is sprayed to a certain amount of bentonite under the condition of stirring, continuous stirring is performed for 30-60 min after spraying is finished, and air dying is performed so as to to obtain the bentonite. The method is particularly suitable for fixed restoration of arsenic-polluted farmland soil, absorption and accumulation of arsenic in crops can be reduced effectively, and the safety of agricultural products is ensured.

Description

technical field [0001] The invention belongs to the technical field of reducing arsenic accumulation in rice grains, and more specifically relates to a method for reducing arsenic accumulation in rice grains. Background technique [0002] How to effectively control and reduce soil heavy metal pollution and harm is an increasingly serious international problem, especially in our country. In particular, it is difficult to find a low-cost, broad-spectrum, and highly operable technical method for the treatment of large-scale heavy metal-contaminated farmland soil. It is particularly difficult to control heavy metal complex pollution of farmland. For example, compared with single pollution, the combined pollution of arsenic and cadmium has more complex environmental effects and more difficult treatment due to the interaction between them. Contents of the invention [0003] The purpose of the present invention is to solve the shortcomings in the prior art, and propose a method ...

AI Technical Summary

Problems solved by technology

Especially for the treatment of large areas of heavy metal polluted farmland soil, it is difficult to find low-cost, broad-spectrum, and highly operable technical methods

It is particularly difficult to control heavy metal complex pollution of farmland. For example, compared with single pollution, the combined pollution of arsenic and cadmium has more complex environmental effects and more difficult treatment due to the interaction between them.