绿色食品产地评价——以京津冀永清地区为例

胡庆海, 王学求, 田密, 吴慧, 柳青青, 李俊华, 盘炜, 王丽君

Assessment of green food production areas: A case study of the Yongqing area in the Beijing-Tianjin-Hebei region

HU Qing-Hai, WANG Xue-Qiu, TIAN Mi, WU Hui, LIU Qing-Qing, LI Jun-Hua, PAN Wei, WANG Li-Jun

图3 永清县表层土壤中硒(a)、碘(b)、氟(c)、锗(d)元素含量空间分布

Fig.3 Geochemical maps of selenium (a), iodine (b), fluorine (c), germanium (d) contents in surface soils in the Yongqing County