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《ACTA ECOLOGICA SINICA》 1994-01
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DYNAMICS AND REGULATION OF CLONAL RAMET POPULATION IN KOMRESIA HUMILIS UNDER DIFFRENT STOCKING INTENSITIES

Zhu Zhihong(Dept.of grassland,Qinghai Animal Husbandry and Veterinary Medicine College,Xining, 810003)Wang Gang Zhao Songling(Dept.of Biology,Lanzhou University,Lanzhou,730000)  
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.
【Fund】: 中国科学院海北高寒草甸生态系统开放定位站基金
【CateGory Index】: S812
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