| 摘要: |
| 【目的】研究甘肃小陇山林区锐齿栎原始林群落的空间结构特征，为小陇山林区锐齿栎次生林的经营提供参考。【方法】在小陇山林区选择锐齿栎原始林建立100 m×100 m的固定样地，运用每木定位调查数据和林分空间结构分析软件，分析锐齿栎原始林群落的林木分布格局、树种隔离程度和大小分化程度。【结果】锐齿栎原始林群落的平均角尺度为0.531，建群种锐齿栎种群的平均角尺度为0.526，主要伴生树种鹅耳枥、地锦槭、光叶泡花树、鄂椴、小叶鹅耳枥、川鄂鹅耳枥、水榆花楸的平均角尺度依次为0.586，0.535，0.604，0.556，0.604，0.634和0.559；该群落平均混交度为0.71，修正混交度为0.475；群落中主要树种的平均大小比数排序为辽东栎＜锐齿栎＜桦椴＜鄂椴＜鹅耳枥＜地锦槭＜水榆花楸＜小叶鹅耳枥＜川鄂鹅耳枥＜光叶泡花树；树种优势度排序为锐齿栎>辽东栎>鹅耳枥>桦椴>地锦槭>鄂椴>小叶鹅耳枥>川鄂鹅耳枥>水榆花楸>光叶泡花树。【结论】锐齿栎原始林群落林木分布格局为轻微的团状分布，林内各树种高度混交，锐齿栎在林分中占绝对优势，该群落的空间结构特征可作为小陇山林区锐齿栎次生林目标林分的参考依据。 |
| 关键词: 小陇山林区 锐齿栎 原始林 空间结构 |
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| 基金项目:农业科技成果转化资金项目 (2012GB2G100462)；天水市科技支撑项目（20121003） |
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| Spatial structure characteristics of Quercus aliena var.acuteserrata primeval forest in Xiaolongshan forest area |
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GUO Xiao-long,LIU Wen-zhen,ZHANG Song-zhi,et al
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| Abstract: |
| 【Objective】This study investigated the spatial structure characteristics of Quercus aliena var.acuteserrata primeval forest in Xiaolongshan forest area to provide reference for management of Q.aliena var.acuteserrata secondary forest.【Method】A fixed plot with area of 100 m×100 m was established in Q.aliena var.acuteserrata primitive forest in Xiaolongshan forest area,and per wood investigation data and software for stand spatial characteristics analyses were used to analyze the spatial distribution pattern,tree species isolation degree and size differentiation of Q.aliena var.acuteserrata forest community.【Result】Average uniform angle index of Q.aliena var.acuteserrata primitive forest community was 0.531,and that of constructive species was 0.526.The average uniform angle indexes of main associated tree species Carpinus turczaninowii Hance,Acer mono Maxim,Meliosma cuneifolia Franch.var.glabriuscula Cufed,Tilia oliveri Szyszyl,Carpinus turczaninowii Hance var stpulata winkl,Carpinus henryana.(Winkl) Win,and Sorbus alnifolia were 0.586,0.535,0.604,0.556,0.604,0.634 and 0.559,respectively.The average community mingling was 0.71,and that of the modified stand was 0.475.The community size of main composition species of was in an increasing order of Quercus liaotungensis Koidz <Q. aliena var.acuteserrata Maxim<Tilia chinensis Maxim<T.oliveri Szyszyl<C.turczaninowii Hance<A.mono Maxim<S.alnifolia<C.turczaninowii Hance var stpulata Winkl<C.henryana.(Winkl) Win<M.cuneifolia Franch.var.glabriuscula cufed.The dominance of tree species was in a descending order of Q.aliena var.acuteserrata Maxim>Q.liaotungensis Koidz>C.turczaninowii Hance>T.chinensis Maxim>A.mono Maxim>T.oliveri Szyszyl>C.turczaninowii Hance var stpulata Winkl>C.henryana.(Winkl) Win>S.alnifolia>M.cuneifolia Franch.var.glabriuscula cuffed.【Conclusion】Q.aliena var.acuteserrata virgin forest trees had a slight clumped distribution with highly mixed tree species and Q.aliena var.acuteserrata had the absolute superiority.The spatial structure characteristics of Q.aliena virgin forest in Xiaolongshan forest area could be used as a reference for the management of Q.aliena secondary forest. |
| Key words: Xiaolongshan forest area Quercus aliena var.acuteserrata virgin forest spatial structure |
