1. 作者中文名：耿玉清；单宏臣；谭笑；孙向阳；王登芝摘要：作者研究了北京西山地区人工针叶林林冠空隙和林冠下的土壤及植被状况。 The authors had studied the soils and vegetation in forest gaps and under the canopy in the artificial coniferous forests of the West Mountain of Beijing.