Strategies to manage the risk of heavy metal(loid) contamination in agricultural soils  

作　　者：Fang-Jie ZHAO 

机构地区：[1]College of Resources and Environmental Sciences,Nanjing Agricultural University,Nanjing 210095,China

出　　处：《Frontiers of Agricultural Science and Engineering》2020年第3期333-338,共6页农业科学与工程前沿（英文版）

基　　金：the National Natural Science Foundation of China(21661132001 and 41930758);the Innovative Research Team Development Plan of the Ministry of Education of China(IRT17R56);the Fundamental Research Funds for the Central Universities(KYT201802).

摘　　要：Soil contamination with heavy metal(loid)sthreatens soil ecological functions, water quality and foodsafety;the latter is the focus of this review. Cadmium (Cd)and arsenic (As) are the toxic elements of most concern forfood safety because they are relatively easily taken up byfood crops. Rice is a major contributor of both Cd and Asintakes to the Chinese population. Contarmination and soilacidification are the main causes of high Cd levels in ricegrains produced in some areas of southern China. The riskof Cd and As accumulation in food crops can be mitigatedthrough agronomic practices and crop breeding. Liming iseffective and economical at reducing Cd uptake by rice inacid soils. Paddy water management can produce oppositeeffects on Cd and As accumulation. Many genes control-ling Cd and As uptake and translocation have beencharacterized, paving the way to breeding low accumulat-ing crop cultivars through marker- -assisted molecularbreeding or genetic engineering. It is important to protectagricultural soils from future contamination. L ong-termmonitoring of anthropogenic additions and accumulationof heavy metal(loid)s in agricultural soils should beundertaken. Mass-balance models should be constructedto evaluate future trends of metal(loid)s in agricultural soilsat a regional scale.

关 键 词：ARSENIC CADMIUM food safety heavy metals soil contamination 

分 类 号：X53[环境科学与工程—环境工程]