青藏高原几种嵩草的生物量及其幼苗生长发育的初步研究

研究了青藏高原４种嵩草属植物的枝条发育状况，生物量积累特征以及３种嵩草幼苗的生长发良规律。结果表明；各嵩草营养枝条的季节变化有两个高峰期，而线叶蒿草的生殖枝有一个明显的高峰期，其它嵩草无高期峰。

Seedling Development and Biomass Accumulation of Kobresia on Qinghai -Tibetan Plateau

The patterns in development and biomass accumulation of 4 species of Kobresia on the Qing-hai-Tibetan Plateau were investigated in this study. It was shown that there were two growth peaks in the development of vegetative branches for all the species investigated, while there was only one peak in the development of reproductive branches for a single species Kobresia capillifo-lia and no obvious peaks for other species. The maximum above-ground biomass was achieved respectively by these species in the period from early August to early September, The underground biomass of these species was 72. 60 to 614. 6 times as high as the above-ground one. The development of seedlings of the species was slow:there were very few tiller shoots formed among the 4-year-old seedlings. Also, the germination rate of the species was low, ranging only between 2%-13%.