不同退化程度下嵩草草甸矮嵩草无性系构件的研究

对不同退化程度下嵩草草甸矮嵩草无性系构件进行了研究。结果表明,矮嵩草无性系的面积大小与矮嵩草构件总数量和生物量显著相关(P<0.05),与其各构件平均值基本不相关。随着退化程度的加重,在一定限度内单位面积上各分株和各分蘖数量和生物量有所增加,随后呈下降趋势;平均分株数量与生物量、分蘖数量与生物量均呈下降趋势;每分株分蘖(营养、生殖)、每分蘖(营养、生殖)、生殖(叶、秆)的数量和生物量也呈下降趋势;平均分蘖节直径有增加的趋势,平均分蘖节距地面的高度除极度退化外均呈上升趋势。

Study on Clonal Modules of Kobresia humilis under Different Degenerative Gradation in Kobresia Meadow

The clonal modules of Kobresia humilis under different degenerative gradation in Kobresia Meadow were studied.The results showed that there was a significant correlation between area size of Kobresia humilis clone and total number and biomass of Kobresia humilis clonal modules(P<0.05),but no correlation between area size of Kobresia humilis clone and average value of clonal modules.With aggravation of degradation,the number and biomass of each ramet and each tiller per unit area increased in a certain period,but then tended to decline.Average number and biomass of ramet,number and biomass of tiller declined,so did the number and biomass of each ramet(nutrition,reproduction),each tiller(nutrition,reproduction) and reproduction(leaf,stalk);the average diameter of tiller node had an increasing tend,the height of tiller node from ground tended to increase.