多种评价方法应用于天津核桃主产区的土壤环境质量评价
谢薇, 杨耀栋, 侯佳渝, 菅桂芹, 李国成, 赵新华

The evaluation of soil environmental quality of main walnut producing areas based on various methods of heavy metal contamination assessment in Tianjin
XIE Wei, YANG Yao-Dong, HOU Jia-Yu, JIAN Gui-Qin, LI Guo-Cheng, ZHAO Xin-Hua
图2 土壤重金属元素污染负荷指数分布
Fig.2 Risk assessment map of calculated indices IPL in study area