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Position: Home > Articles > A preliminary study of the effect of simulated precipitation on an alpine Kobresia humilis meadow Acta Prataculturae Sinica 2003,12 (2) 25-29

模拟降水对高寒矮嵩草草甸群落影响的初步研究

作者：

王长庭;王启基;沈振西;彭红春;李海英

单位：

中国科学院西北高原生物研究所

关键词：

模拟降水;矮嵩草草甸;地上生物量;多样性指数;均匀度指数

摘要：

通过野外控制实验,研究了高寒矮嵩草草甸不同植物类群、群落对模拟增减降水条件下的响应。结果表明,不同植物类群(禾草类、莎草类)增加降水20%,地上生物量分别比对照提高103.63、77.12g/m2。在植物生长期(6月),增加降水20%及40%,植物群落物种多样性指数(H)分别比对照提高0.188和0.735;而均匀度指数(J)在增加降水40%时,提高了0.086。生长期(7月)增加降水20%,物种多样性指数(H)和均匀度指数(J)分别提高0.409和0.07。当降水增加20%时,植物群落中禾草类的重要值较对照提高了0.92。

译名：

A preliminary study of the effect of simulated precipitation on an alpine Kobresia humilis meadow

作者：

WANG Changting, WANG Qiji, SHEN Zhenxi, PENG Hongchun, LI Haiying(Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810001, China)

关键词：

simulated precipitation; Kobresia humilis meadow; above ground biomass; diversity index; evenness index

摘要：

Field controlled experiments were conducted to examine the response of different plant groups and communities to simulated precipitation changes in an alpine Kobresia humilis meadow. The results indicated that in the grass group and sedge group, the above ground biomass in the plots, where the precipitation increased by 20%, was 103.36 g/m2 and 77.12 g/m2 respectively, over that of the control plot. In the growing season of plants (June), the diversity index (H) of plant community in plots where the precipitation increased by 20% and 40% was 0.188 and 0.735, respectively, the evenness index (J) with 40% increase of precipitation was 0.086, over that of the control plot. In the growing season of plants (July), the diversity index (H) and evenness index (J) of plant community in plot with 20% increase of precipitation was 0.409 and 0.07, respectively, over that of the control plot. The important value of grasses of plant communities in plot with 20% increase of precipitation was 0.92 over that of the control plot.

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模拟降水对高寒矮嵩草草甸群落影响的初步研究

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