摘要
本文对张家口坝上地区杨树防护林的基本情况和杨树退化死亡的原因进行了解,分析得出林木生理老化的主要原因为干旱、密度大、扦插苗木的使用和后期管理不当,其中可控因素例如苗木、密度和后期管理等因素的改善对于改进坝上防护林设计具有一定的意义。
This paper understands the basic situation of poplar shelter forest in Zhangjiakou Bashang area and the causes of poplar degeneration death. It is concluded that the main causes of physiological aging of forest trees are drought, high density, use of cutting seedlings and improper management. The improvement of factors such as seedlings, density and post-management has certain significance for improving the design of shelter forest on the dam.
作者
杜海峰
Du Haifeng(Guyuan County Natural Resources and Planning Bureau, Zhangjiakou Hebei 076550, China)
出处
《环境与发展》
2019年第7期195-195,197,共2页
Environment & Development
关键词
坝上
防护林:退化
Dam
Shelter forest: Degradation