秦岭西段锐齿栎群落林木个体大小分布特征及物种多样性  

Individual Tree Size Distribution and Species Diversity of Quercus aliena var. acuteserrata Community in the West of Qinling

作　　者：张宋智 刘文桢 郭小龙[1,2] 杜彦昌 张建国[2] 王军辉[2] 

机构地区：[1]甘肃省小陇山林科所,甘肃天水741022 [2]中国林业科学研究院林业研究所,国家林业局林木培育重点实验室,北京100091

出　　处：《林业科学研究》2010年第1期65-70,共6页Forest Research

基　　金：国家林业局林木培育重点实验室基金项目“甘肃小陇山植被类型调查及多样性研究”,中国林业科学研究院林业研究所中央级公益性科研院所基本科研业务费专项基金项目“甘肃小陇山次生林主要林型结构特征(RIF2008-06)”

摘　　要：对秦岭西段小陇山林区腹地和林缘区的锐齿栎群落的大小分布和多样性进行了分析，结果表明：林区腹地分布区锐齿栎群落的个体较多，锐齿栎成年林木树高频度分布的峰值出现在7～19m间，占总数的73．54％，3m以下的幼苗幼树占总数的18．43％，锐齿栎幼苗的萌发受中成林木、灌木的影响较大。在林缘分布区内，小于3m以下的幼苗幼树与林区腹地分布相类似，但3m以上各树高阶的数量都很少，特别是成熟林木较少，群落处于不稳定状态。林区腹地锐齿栎群落不同层次的物种组成丰富，物种数均高于林缘区，林区腹地锐齿栎群落多样性灌木层〉草本层〉乔木层，林缘区锐齿栎群落多样性草本层〉灌木层〉乔木层。Tree size distribution and species diversity of Quercus aliena var. acuteserrata community at the hinterland and the edge on Xiaolongshan forest area in the west of Qinling is studied. The result showed that the number of the large trees took a large part at the forest hinterland area, which proportion was 73.54%. The frequency distribution peak of large trees was between 7-19 m, The proportion of the seedlings and saplings under 3 m was 18.43%. The shrub and large tree had great effect on the seedling germination. The feature of the seedlings and saplings under 3 m at the forest edge area was similar to the forest hinterland. These trees with height over than 3 m, especially mature trees were less and the community was unstable. The species composition of different layer in the forest hinterland was abundance and the species number was higher than that at forest edge. The community diversity of Quercus aliena var. acuteserrata community on forest hinterland was in the order of shrub layers 〉 herb layer 〉 arbor layer, the community diversity on forest edge was in the order of herb layer 〉 shrub layer 〉 arbor layer.

关 键 词：锐齿栎 群落特征 多样性 秦岭西段 

分 类 号：S718.54[农业科学—林学]