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作 者 ：朱志红,王刚,赵松岭

期 刊 ：生态学报 1994年 14卷 1期 页码：40~45

关键词：放牧强度；无性系；分株种群；动态；调节；矮嵩草。；

Keywords:stocking intensity, clone, ramet population, dynamics, regulation, Kobresiahumilis.,

摘 要 ：以矮嵩草无性系分株和分蘖分别作为其种群的基本单元，对不同放牧强度下种群的动态与调节进行了研究。结果表明：随着放牧强度的增加，每分株的分蘖数、叶片数及分株个体地上生物量均增加．分蘖死亡率和叶片死亡率在各处理间差异不显著。分蘖死亡率的高峰出现在生长季末，叶片死亡率在生长初期和末期较高，而且都不属于密度制约性的死亡。矮嵩草多重种群结构水平的数量调节是由最外层次（叶片层次）的数量变化引起的，进而影响到较内层次上结构单元的大小和数量。

Abstract:Considering ramet or tiller of Kobresia humilis as a basic unit of population,the dynam-ics and the regulation of populations were studied under different stocking intensities. The re-sults showed that the number of tillers or leaves per ramet and the aboveground biomass oframet individual increased with the increasing of stocking intensities.No significant differ-ence in the mortality of tillers and leaves among grazing treatments. The peak of mortalitywas in the end of growth season for tillets,and in the ...

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