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林业资源管理 ›› 2015, Vol. 0 ›› Issue (1): 152-155.doi: 10.13466/j.cnki.lyzygl.2015.01.027

• 科学研究 • 上一篇    下一篇

张北县杨树种群衰退原因初探——以盘城营为例

程月明, 张愿, 崔硕, 马长明   

  1. 河北农业大学,河北 保定 071000
  • 出版日期:2015-02-28 发布日期:2020-12-01
  • 通讯作者: 马长明,男,博士,副教授,主要研究方向为森林培育学。Email:machangming@126.com
  • 作者简介:程月明(1989-),女,河北唐山人,在读硕士,主要从事森林培育的相关工作,主要研究林木耗水。Email:yue_ming_cheng@sina.com
  • 基金资助:
    华北山区针阔混交林种间水分关系及结构优化技术研究(201404206-02)

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

CHENG Yueming, ZHANG Yuan, CUI Shuo, MA Changming   

  1. Agriculture University of Hebei,Baoding,Hebei 071000,China
  • Online:2015-02-28 Published:2020-12-01

摘要: 设置6块样地对河北省张北地区杨树林分枯稍的原因进行了调查,结果表明样地Ⅱ和样地Ⅳ内,枯稍程度与树高的相关性在0.05的水平上均达到了显著相关,而枯稍与胸径的相关性在样地Ⅱ内达到了显著相关,在样地Ⅳ内相关性不显著;被调查的6块样地有5块样地土壤剖面中存在钙积层,它阻碍了根系向下生长,杨树在该土壤条件下不能继续正常生长,是杨树枯稍的一个重要原因;杨树林龄过大,树势较弱,地下水紧缺以及虫害危害对枯稍也有影响。我们认为,在更新整地时,挖穿钙积层更有利于林分生长;选择造林树种时,尝试用采伐周期更长、适生性更好的樟子松和榆树造林,或可取得更佳的生态效益;该地区应做好森林防虫工作,并严格控制农业生产用水。

关键词: 张北县, 杨树, 枯稍, 钙积层

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

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