作　　者： ; (刘文桢）; (郭小龙）; (张宋智）; (马建伟）;

机构地区： 甘肃省小陇山林业实验局林业科学研究所

出　　处： 《西北农林科技大学学报（自然科学版）》 2014年第10期87-94,102,共9页

摘　　要： 【目的】研究甘肃小陇山林区锐齿栎原始林的径级结构与物种多样性特征,为小陇山林区锐齿栎次生林经营提供参考。【方法】以小陇山林区的锐齿栎原始林为研究对象,在研究区测设面积为100m×100m的样地,运用样地每木定位调查和小样方调查方法,统计分析乔木层树种的重要值和主要树种的径级结构,并调查乔木层、灌木层、草本层的物种组成及数量,计算各林层的多样性指数。【结果】锐齿栎原始林群落物种组成丰富,主要伴生树种有鹅耳枥、地锦槭、光叶泡花树、鄂椴等;林分直径结构为典型的倒J型分布,锐齿栎种群的径级结构呈典型的正态分布;该群落乔木层容纳物种数53种,Shannon-Wiener指数、Pielou均匀度指数和优势度指数分别为3.130,0.955和0.063;灌木层有物种数46种,Shannon-Wiener指数1.395,优势度指数0.547,Pielou均匀度指数0.462;草本层共有物种数58种,Shannon-Wiener指数1.899,优势度指数0.358,Pielou均匀度指数0.653。【结论】小陇山锐齿栎原始林群落物种组成丰富,径级结构呈典型异龄林特征,群落中乔木层树种多样性较高,树种分布均匀且优势树种集中性低;草本层和灌木层物种多样性低,物种分布不均匀且优势树种集中性高。 【Objective】The study focused on the diameter class and species diversity characteristics of Q.alienavar.acuteserratavirgin forest in Xiaolongshan Forest Area,aiming to provide reference for management of Q.alienavar.acuteserratasecondary forest.【Method】Q.aliena var.acuteserrata virgin forest in Xiaolongshan Forest Area was chosen and 100m×100msample plot was built in the study area.Using the fixed sample per wooden location survey and quadrat sampling methods,the important value of tree layer species and the diameter structure of main tree species were analyzed.The species compositions and quantities of tree layer,shrub layer and herb layer were investigated and diversity index of each layer was also calculated.【Result】The species compositions of Q.aliena var.acuteserrata virgin forest were abundant and main tree species included Carpinus turczaninowii Hance,Acer mono Maxim.,Meliosma cuneifolia Franch.var.glabriuscula cufod.and Tilia oliveri Szyszyl.The stand diameter structure had a shape of typical inverted'J'and the diameter structure of Q.aliena var.acuteserrata population had a typical normal distribution.There were 53 species in the tree layer of the community with the Shannon-Wiener index,dominance index and Pielou evenness index of 3.130,0.063 and 0.955,respectively.There were 46 species in the shrub layer and the Shannon-Wiener index,dominance index and Pielou evenness index were 1.395,0.547,and 0.462,respectively.There were 58 species in the herb layer and the Shannon-Wiener index,dominance index and Pielou evenness index were 1.899,0.358,and 0.653,respectively.【Conclusion】The species compositions of Q.alienavar.acuteserratavirgin forest in Xiaolongshan were abundant.The diameter structure was in a typical uneven-aged distribution.The species diversity of tree layer was high,species were well distributed,and dominant species were in low concentration.The species diversities of shrub layer and herb layer were lower,species distribution was uneven,and the dominant species were in high con

关 键 词： 小陇山林区 锐齿栎 原始林 径级结构 物种多样性

领　　域： [农业科学]