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8 防护林结构与渠首的距离关系

Fig.8 Correlation of shelterbelts structure and distance from the head of the canal