冀西北坝上地区杨树防护林退化的影响因素
郑春雅, 许中旗, 马长明, 孙守家, 闫腾飞
The Factors Influencing the Poplar Shelterbelt Degradation in the Bashang Plateau of Northwest Hebei Province
ZHENG Chunya, XU Zhongqi, MA Changming, SUN Shoujia, YAN Tengfei
林草资源研究
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2018, (1): 9
-15
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DOI: 10.13466/j.cnki.lyzygl.2018.01.002
