河西走廊酒泉绿洲农田防护林格局与结构
吕王亦庄, 赵文智

The structure and pattern of farmland shelterbelts in Jiuquan Oasis of Hexi Corridor
Wangyizhuang Lv, Wenzhi Zhao
图1 研究区位置及取样点分布
Fig.1 Location of the study area and distribution of sampling points