太阳成集团tyc7111cc(中国)有限公司

【作者】 王成尘； 田稳； 向萍； 徐武美； 管冬兴； 马奇英；

【Author】 WANG Cheng-chen;TIAN Wen;XIANG Ping;XU Wu-mei;GUAN Dong-xing;Lena Q.MA;School of Ecology and Environment/Institute of Environmental Remediation and Human Health,Southwest Forestry University;School of Energy and Environment Science,Yunnan Normal University;College of Environmental and Resource Sciences,Zhejiang University;

【机构】 西南林业大学生态与环境学院环境修复与健康研究院； 云南师范大学能源与环境科学学院； 浙江大学环境与资源学院；

【摘要】 为掌握我国水稻和小麦作物的重金属污染情况,收集了我国粮食主产区水稻/小麦-土壤系统中的砷(As)、镉(Cd)、铬(Cr)和铅(Pb)含量,综述了其吸收、转运、积累机制和有效的修复措施.结果表明,我国粮食主产区水稻及小麦籽粒的Cd超标率达31.3%和22.2%,Pb的超标率达26.2%和32.1%,污染情况较为突出;降低As、Cd、Cr和Pb的生物有效性,控制其在水稻/小麦植株中的吸收,能够有效减少籽粒中的积累;土壤-作物系统中重金属的吸收可通过水肥管理、化学改良、植物修复、生物修复和遗传学方法等有效调控,从而实现安全生产.今后,应形成多学科交叉互融的全要素格局来完善我国的土壤污染研究,开发农产品安全生产的污染土壤利用技术,从而更好地保障国家粮食安全生产. 

【Abstract】 To master the heavy metal pollution in rice and wheat crops from main production regions in China, we collected the data from existing literature and analyzed the concentrations of arsenic(As), cadmium(Cd), chromium(Cr) and lead(Pb) in soil-rice/wheat system, summarized their underlying mechanisms of target heavy metals absorption, transport, and accumulation. In addition, effective remediation measures for safe production were also introduced. The results showed that 31.3% and 22.2% of Cd,26.2%... 更多