广西马山县岩溶区土壤硒含量分布及影响因素研究

张春来, 杨慧, 黄芬, 曹建华

Distribution and influencing factors of selenium content in soil in karst areas in Mashan County, Guangxi, China

ZHANG Chun-Lai, YANG Hui, Huang Fen, CAO Jian-Hua

图2 研究区土壤硒分级评价

Fig.2 Gradingchart of soil Se in study area