黄土高原子午岭林区辽东栎种群分布格局及群落特征研究  

Spatial Distribution Pattern and the Community Characteristic of Quercus liaotungensis Forest in the Ziwuling Region

作　　者：胡秀娟[1] 程积民[2] 杨晓梅[2] 范文娟[1] 孟蕾[1] 韩娟娟[1] 

机构地区：[1]西北农林科技大学林学院,陕西杨陵712100 [2]中国科学院水利部水土保持研究所,陕西杨陵712100

出　　处：《西北林学院学报》2010年第5期1-6,共6页Journal of Northwest Forestry University

基　　金：中国科学院重要方向项目(KZCX2-YW-441);国家重点基础研究发展计划973项目(2007CB106803);国家自然科学基金重点项目(40730631);国家科技支撑课题(2006BAD09B08)

摘　　要：辽东栎是子午岭地区主要的优势森林树种,通过野外调查和室内分析相结合的方法,对子午岭林区辽东栎林种群分布格局及群落特征进行了研究,为其合理保护和经营提供依据。调查结果表明：（1）辽东栎随取样面积的增大,种群聚集度呈现出小→大→小的趋势;随林龄的增加,种群由聚集分布趋向随机分布。（2）子午岭辽东栎林除局部林是与其他林木混交外,一般都是纯林,形成乔灌草的典型垂直结构。（3）子午岭林区辽东栎林物种较为丰富且分布均匀,多样性大。乔木层、灌木层、草本层三者的多样性指数呈现出由低到高的特点。（4）林下幼苗的更新情况并不是太好,幼苗更新数量为80-210株·hm^-2,且随外部环境的不同而有所差别。Quercus liaotungensis is one of the dominant tree species in Ziwuling Mountain.Based on the investigation and analysis of the plots data,the spatial distribution pattern and the community characteristics of Q.liaotungensis forest in Ziwuling Mountain were preliminarily studied.The analysis results showed that（1） With the increasing sampling area,the population aggregation exhibited small → large → small trend,and with the increase of forest age,population trended to become random from aggregated distribution;（2） Exept for some locations,Q.liaotungensis forest was pure in general,forming a typical vertical structure of tree-bush-grass;（3） Other plant species were abundant and evenly distributed in the forest,and the plant diversity from low to high was in the order of tree,shrub and herbage layers;（4） Natural regeneration of yong seedlings of Q.liaotungensis under the forest was poor,and appeared significantly different under different site conditions.

关 键 词：黄土高原 子午岭林区 辽东栎 分布格局 群落特征 

分 类 号：S718.54[农业科学—林学]