海东河湟流域现有杨树进行更新改造的意见

Renew Improve Idea on Existing Poplar in Yellow River and Huangshui Watershed of East of Qinghai

结合海东河湟流域的社会自然状况和杨树资源现状,提出了杨树更新改造的必要性,阐述了杨树更新改造的方向、步骤、方法及保障措施。

Necessity on renew and improvement for existing Poplar was offered comebined with sciety natural conditions and poplar resources status quo in Yellow River and Huangshui watershed of east of Qinghai. Poplar renew and improvement , step, methods and ensure measurements were stated.