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作 者 ：罗大庆,郭泉水,黄界,潘刚,辛学兵,郑维列

期 刊 ：生态学报 2004年 24卷 3期 页码：635~639

关键词：急尖长苞冷杉；死亡木类型；现存量；养分分解；特征；

Keywords:Abies georgei var, types of dead wood, present storage, decompose of nutrient, Character,

摘 要 ：通过色季拉原始冷杉林死亡木的研究 ,结果表明 :冷杉林死亡木主要由枯立木、拔根倒木、干基折断木和干中折断木 4种类型构成 ,其中干基折断和拔根倒方式形成的倒木是林地死亡木最主要的输入形式 ;主林层林木的老龄化和心腐病导致了树势的衰弱 ,极易发生折倒 ,风害、雪压是诱发立木折倒死亡的直接原因。冷杉林死亡木的现存量为 111.53 t· hm- 2 ;C、N、P、K、Ca、Mg 6种养分元素的总贮量为 60 442 .69kg· hm- 2 ;原始冷杉林死亡木现存量大、养分贮量高 ,是目前国内已知的针叶林类型中贮量最高的。

Abstract:The dead wood of primeval Abies of Sejila Mountain in Southeastern Tibet was studied by the investigations of the permanent standard plot (100m×100m) and temporary sample plot (20m×30m) as a supplement. The results show that the dead wood is composed mainly of the standing die, the uprooted blown down, the breakage at trunk and the blown down. The main reasons for weakening trees are the old-age and rot disease of trees, and indirect factors to induce tree fallen include strong wind, rain, snow and human in...

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