Study on Poplar Degeneration in Zhangbei County,Hebei Province —A case study in Panchengying

doi:10.13466/j.cnki.lyzygl.2015.01.027

Abstract

Abstract: To understand the reasons for poplar degeneration with different degrees in Zhangbei,we investigated the poplar forest stands.Results suggest that in plot Ⅱ and plot Ⅳ,the top dry degree had significant correlation with tree height in a certain level.But when the top dry degree and the diameter at breast height had significant correlation in plot Ⅱ,there was no significant correlation in plot Ⅳ.In all the 6 plots investigated,5 had tepetate in their soil profiles.The tepetate kept root system from growing in soil,it was a main top dry factor.As the forest age was too old and underground water was decreasing sharply,the trees were really weak,which were easily attacked by insects.

Key words: Zhangbei, poplar, top dry, tepetate

CLC Number:

CHENG Yueming, ZHANG Yuan, CUI Shuo, MA Changming. Study on Poplar Degeneration in Zhangbei County,Hebei Province —A case study in Panchengying[J]. FOREST RESOURCES WANAGEMENT, 2015, (1): 152-155.

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