北京市耕地表层土壤有机碳分布及其影响因素

孔祥斌, 胡莹洁, 李月, 段增强

Distribution and influencing factors of soil organic carbon of cultivated land topsoil in Beijing

KONG Xiangbin, HU Yingjie, LI Yue, DUAN Zengqiang

图4 北京市土壤类型图

Figure 4 Soil map of Beijing