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OALib Journal期刊
ISSN: 2333-9721
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小陇山林区主要森林群落凋落物及死木质残体储量
DOI: 10.3724/SP.J.1145.2011.00046, PP. 46-50
Keywords: 小陇山,粗死木质残体,细小木质残体,凋落物,锐齿栎,油松
Abstract:
采用固定面积样方取样法研究了小陇山林区锐齿栎和油松天然林死木质残体及凋落物的总储量.结果表明：小陇山林区锐齿栎天然林粗死木质残体（coarsewoodydebris，简称cwd）和细小木质残体（finewoodydebris，简称fwd）储量分别为29350.92kghm-2和2298.41kghm-2，分别为油松天然林的3.8和1.3倍.油松林cwd组成中枯立木占到85.65%，倒木只占14.35%，而锐齿栎天然林枯立木和倒木所占的比例基本为1.从cwd的径级结构上来说，锐齿栎林内以大径级cwd为主（≥20cm），占样地cwd总储量的60.81%，天然油松林以小径级（20cm≥小径级≥10cm）cwd为主，大、小径级分别占cwd储量的55.33%和44.67%.油松林内凋落物储量为30472.31kghm-2，是天然锐齿栎凋落物储量8902.29kghm-2的3倍以上.凋落物和死木质残体储量的不同是锐齿栎天然林和油松天然林种群结构、林分更新和群落内部竞争状况及凋落物分解状况差异所导致的结果.表6参29
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