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林业资源管理 ›› 2014›› Issue (3): 71-76.doi: 10.13466/j.cnki.lyzygl.2014.03.016

• 科学研究 • 上一篇    下一篇

冀北山地白桦典型大小比数与直径生长关系研究

黄龙生1, 霍艳玲1, 金辉2, 李永宁1   

  1. 1.河北农业大学 林学院,保定 071000;
    2.陕西省凤翔县林业技术推广站,陕西 凤翔 721400
  • 收稿日期:2014-03-24 修回日期:2014-06-30 出版日期:2014-06-28 发布日期:2020-12-09
  • 通讯作者: 李永宁(1970-),男,副教授,博士,主要从事资源调查、信息管理与森林可持续经营等研究工作。Email:yongninghao@163.com
  • 作者简介:黄龙生(1988-),男,河南信阳人,在读硕士,研究方向为森林经理学。Email:xyhls1988@163.com
  • 基金资助:
    “十二五”农村领域国家科技计划“华北土石山区森林可持续经营技术研究与示范”(2012BAD22B0304)

Relationship between Neighborhood Comparison and Diameter Growth of Secondary Poplar-birch Forest in the Mountains of North Hebei

HUANG Longsheng1, HUO Yanling1, JIN Hui2, LI Yongning1   

  1. 1. School of Forestry,Agricultural University of Hebei,Baoding,Hebei 071000,China;
    2. Forestry Bureau of Fengxiang County,Fengxiang,Shaanxi 721400,China
  • Received:2014-03-24 Revised:2014-06-30 Online:2014-06-28 Published:2020-12-09

摘要: 以冀北山地杨桦次生林为对象,以参照树与周围最近4株相邻木为空间结构单元,以林木年轮宽度确定直径生长,研究大小比数与直径生长的关系。结果表明:该林分林木间在10~20a竞争最为激烈,是对林分进行森林经营管理、调整林分密度的最佳时期。林木大小比数的形成主要取决于林木最初生长状况以及林木的竞争能力;3个大小比数木生长优势比较,优势木生长优势明显,中庸木对劣态木无明显的生长优势;林木优势度越低,其直径生长与外界环境条件的相关性越低。

关键词: 冀北山地, 杨桦次生林, 大小比数, 直径生长

Abstract: Taking the secondary poplar-birch forest in the mountains of north Hebei as test objects,the reference tree and 4 closest neighboring trees as the spatial structure unit,the width of the tree ring is used for determining the diameter growth to study the relationship between neighborhood comparison and diameter growth.The results show that the most competitive time of the forest trees is 10~20a,which is the best time to manage the forest stand and readjust the density.The reason for formation of Betula platyphylla neighborhood comparison mainly depends on the conditions of the forest growth at its early stage and their competitive ability.Compared with the three neighborhood comparisons,the dominant trees grow better,the middle trees have no obvious growth advantage to the bad state trees.The lower the advantage of the trees is,the lower the relationship between diameter growth and external environment condition is.

Key words: mountains of north Hebei, secondary poplar-birch forest, neighborhood comparison, diameter growth

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