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不同放牧强度下矮嵩草(Kobresia humilis)无性系分株种群的动调
引用本文:朱志红,王刚,赵松岭.不同放牧强度下矮嵩草(Kobresia humilis)无性系分株种群的动调[J].生态学报,1994,14(1):40-45.
作者姓名:朱志红  王刚  赵松岭
作者单位:青海畜牧兽医学院草原系,兰州大学生物系
基金项目:中国科学院海北高寒草甸生态系统开放定位站基金
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。

关 键 词:放牧强度,无性系,分株种群,动态,调节,矮嵩草。
收稿时间:1992/5/20 0:00:00
修稿时间:1993/1/15 0:00:00

DYNAMICS AND REGULATION OF CLONAL RAMET POPULATION IN KOMRESIA HUMILIS UNDER DIFFRENT STOCKING INTENSITIES
Zhu Zhihong.DYNAMICS AND REGULATION OF CLONAL RAMET POPULATION IN KOMRESIA HUMILIS UNDER DIFFRENT STOCKING INTENSITIES[J].Acta Ecologica Sinica,1994,14(1):40-45.
Authors:Zhu Zhihong
Institution:Dept.of grassland; Qinghai Animal Husbandry and Veterinary Medicine College; Xining; 810003
Abstract:onsidering 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 beginning and end of growth season forleaves. The regulation of the Kobresia humilis population that have multiple levels of popula-tion structure was caused by the quantitative changes in the exterior layer.It affected the sizeand the numbers of structure unit of the interior layer.
Keywords:stocking intensity  clone  ramet population  dynamics  regulation  Kobresiahumilis    
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