黑龙江省乌裕尔河流域土壤中某些微量元素地球化学特征

张哲寰, 戴慧敏, 宋运红, 杨佳佳

Geochemical characteristics of some soil trace elements in the Wuyuer River Basin, Heilongjiang Province

ZHANG Zhe-Huan, DAI Hui-Min, SONG Yun-Hong, YANG Jia-Jia

图2 微量元素含量等级 1—一等(丰富);2—二等(较丰富);3—三等(中等);4—四等(较缺乏);5—五等(缺乏)

Fig.2 Grade map of topsoil trace elements Content 1—first-class(rich);2—second(relatively rich);3—third class (secondary);4—fourth class (relatively lack);5—five class (lack)