三江平原西部土壤硒分布特征及其影响因素

牛雪, 何锦, 庞雅婕, 明圆圆

Distribution feature of soil selenium in west Sanjiang plain and its influencing factors

NIU Xue, HE Jin, PANG Ya-Jie, MING Yuan-Yuan

图3 研究区表层土壤R型聚类分析

Fig.3 R-type cluster analysis of surface soil in study area