| 中国亚热高大竹类植物毛竹竹笋克隆生长的密度调节（英文） |
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| 引用本文： | 李睿,钟章成,M.J.A.,维尔格.中国亚热高大竹类植物毛竹竹笋克隆生长的密度调节（英文）[J].植物生态学报,1997,21(1):9-18. |
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| 作者姓名： | 李睿 钟章成 M.J.A. 维尔格 |
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| 摘 要： | 对许多多年生克隆植物来说，大量的研究表明：当光是限制因子时，随着立地密度的不断增加，克隆分株的出生率逐渐减小、死亡率逐渐增加。本文观测了乔木状高大竹类植物毛竹竹笋的出生与存活过程，结果表明：竹笋的出生率，即每样方的出笋数，明显地随着成竹立竹度的增加而增加。更确切地说，竹笋的数量，不管是出笋数还是活笋数，都明显地随着带新叶(1龄叶)的成竹立竹度的增加而增加，而与带老叶(2龄叶)的成竹立竹度相关性不显著。并且竹笋的死亡率是非密度制约的。这可能是由于对毛竹来说，其立地总是比较开敞，而且，其竹笋的生长在很大程度上是不直接需光的。
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| 关 键 词： | 克隆生长 密度制约 叶龄 死亡率 出生率 |
Density Regulation of the Clonal Growth of New Shoots in the Giant Bamboo Phyllostachys pubescens in Subtropical China |
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| Li Rui,Zhong Zhangcheng and M.J.A. Werger.Density Regulation of the Clonal Growth of New Shoots in the Giant Bamboo Phyllostachys pubescens in Subtropical China[J].Acta Phytoecologica Sinica,1997,21(1):9-18. |
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| Authors: | Li Rui Zhong Zhangcheng and MJA Werger |
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| Abstract: | It has been shown that in many clonal perennials, when light is limiting, shoot natality decreases and shoot mortality increases with increasing stand density. In this paper, emergence and survival of new shoots in a giant bamboo Phyllostachys pubescens, were observed in 25 permanent plots, each 6 m × 6 m, over a period of eight censuses at weekly intervals. Our results show that in this bamboo, shoot natality (the number of newly emerged shoots per plot) significantly increased with increasing density of adult shoots. More precisely, the number of newly emerged and/or surviving shoots, significantly increased with increasing density of adult shoots carrying new leaves, but not with that of those carrying old leaves. Furthermore, shoot mortality was density independent. This may be due to the fact that the stands where P. pubescens exists always remain relatively open, and the growth of the new shoots is not directly light-dependent. |
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| Keywords: | Clonal growth Density dependence Leaf age Mortality Natality P pubescens |
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