Research on safe planting of cadmium and arsenic in rice using barrier control technology
To investigate the effects of foliar application of organic selenium and organic silicon on the accumulation of heavy metals in different rice varieties,field experiments were conducted in areas with high levels of heavy metal pollution to screen low-accumulation rice varieties and study leaf surface control techniques for heavy metals,aiming to reduce the heavy metal content in rice grains to meet the requirements of food safety production standards.Six local late rice varieties from Guangxi and two commercially available leaf surface control agents(one selenium-based and one silicon-based)were selected as the research objects.The heavy metal content in rice samples before and after the experiment was measured to study the safe utilization of heavy metal-polluted soil.The results showed that the six rice varieties had significant differences in their ability to adsorb heavy metals.Among them,the stem and leaf cadmium and arsenic content of the variety Taifengyou 208 were higher than those of other varieties,while the cadmium content in Taifengyou 208 was the lowest,and the arsenic content in Sixiang 1 was the lowest.Foliar application of selenium-based and silicon-based control agents also effectively reduced the cadmium content in rice and leaves,as well as the arsenic content in rice.The cadmium content in rice decreased by 15.2%and 17.1%,the cadmium content in leaves decreased by 12.7%and 13.9%,and the arsenic content in rice decreased by 15.9%and 30.0%when selenium-based and silicon-based control agents were applied,respectively.Additionally,the silicon-based control agent effectively reduced the arsenic content in rice leaves.The study indicated that the application of selenium-based and silicon-based control agents can reduce the content of arsenic and cadmium in rice.
late rice varietiesfoliar inhibitorssafe useheavy metal
NETL
NSTL
万方数据
维普
