[Heavy metals cycling and its regulation in China cropland ecosystems].
This paper analyzed the current situation of heavy metal contamination in cropland soils in China, and discussed the input, output, and balance of heavy metals in cropland ecosystems. It was considered that heavy metals had definite accumulation in cropland ecosystems, but overall speaking, this accumulation had relatively small environmental risk, and only some plants, especially vegetables, accumulated heavy metals over the standards. In mining areas, adjacent areas of smelting plants, and the farming areas using larger amounts of related wastes, the heavy metals content in plants and soils was at least ten times higher than that in normal croplands, existing larger environmental risk. Aiming at the current situation of heavy metal contamination of farmland soils in China, some effective regulation measures for the heavy metal cycling in the cropland ecosystems were proposed, and the further research prospects in related fields were discussed.
Ministry of Agriculture Key Laboratory of Agro-Environment & Climate Change, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China. zengxb@ieda.org.cn
Xi-bai
XB
Zeng
Shi-ming
SM
Su
Shi-ming
SM
Ma
Ling-yu
LY
Bai
Shu-hui
SH
Li
Lian-fang
LF
Li
D000383:Agriculture; D002681:China; D017753:Ecosystem; D052918:Environmental Restoration and Remediation / Q000379:methods*; D019216:Metals, Heavy / Q000032:analysis*; D012987:Soil / Q000032:analysis; D012989:Soil Pollutants / Q000032:analysis*
D019216:Metals, Heavy; D012987:Soil; D012989:Soil Pollutants