摘要
通过对宜良县禄丰村林场尖山林区50年生云南松林下7块样地共28个样方天然更新的调查与分析,结果显示:云南松为小块状不均匀更新,样地的更新密度为22 600～66 900株.hm-2,更新幼林的年龄主要集中于3～5年生,其中以4年生的林木较多;上层林木的郁闭度在0.4～0.6之间,有利于云南松林下的天然更新;调查样地内云南松天然更新林木的地径和树高主要分布于0.20～9.53 cm和0.05～3.60 m范围内,且两者间线性相关。
Under a 50-year-old mature Pinus yunnanesis forest, the tree density, tree or seedling growth of natural regeneration in juvenile forests of 7 sampling blocks which were divided into 28 sampling plots were surveyed and analyzed in Lufengcun Forest Farm of Yiliang Conunty. The results show that there existed small block area and tablet-form, uneven natural regeneration （NR） of juvenile forests in the natural P yunanensis woodlands. The NR density was 22 600-66 900 tree.hm-2, the young trees were 3-5-year-old and of them, most trees were 4-yearoold; the shade density of upper mature forests of P. yunnanensis were about 0.4~06, this was propitious to the under-story natural regeneration of P. yunnanensis young trees. The natural regeneration young trees＇ root collar diameter （RCD） and height of the NR stems were 0.20-9.53 cm and 0.05-3.60 m, respectively. There was a linear correlation between the RCD and tree height.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2012年第11期42-46,共5页
Journal of Central South University of Forestry & Technology
基金
国家自然科学基金"云南松蹲苗机理的研究"(项目批准号:31170585)
关键词
云南松
天然更新
更新密度
幼林年龄
径-高分布
Pinus yunnanensis
natural regeneration
regenerative density
age of young tree
distribution of root collar diameter and tree height
