Soil microbial community characteristics under different vegetation types at the Holocene-basalt Platform, Jingpo Lake area, Northeast China Research on Activation Effects and Mechanisms of Phosphatic Manure in Soil under the Eucalypt Plantation in Leizhou Peninsula Heavy Metal Contents in Four Mosses at Two Copper Mines in Northwest Guizhou,China Geochemical characteristics of basaltic sol in Zhejiang province and its significance in resource ecology