Abstract:

Different degraded degrees alpine grassland plant community, above and below ground biomass were surveyed on the winter and spring degradation grassland in Tie Li-jiao village of Ba tang town Yu shu city. The results showed that this area was consisted by 42 species and 33 genera and 16 families plants; the grassland dominant specie changed from Stipa capillacea transition to Aconitum pendulum with increasing the degree of grassland degradation; total coverage, total biomass and high quality forage of grassland all showed a decreasing trend; biomass of miscellaneous grass increased significantly (P < 0.05); and grassland quality and productivity significantly decreased.

Key words: Alpine grassland, Plant community, Dominant specie, Grassland quality

摘要：

在玉树市巴塘乡铁力角村冬春草地上对不同退化程度高寒草地植物群落、地上及地下生物量进行调查分析。结果表明,该地区草地植被由16科33属42种植物组成;随着草地退化程度的加剧,草地优势种由丝颖针茅(Stipa capillacea)向铁棒锤(Aconitum pendulum)过渡;草地总盖度、总生物量及优良牧草生物量均呈降低趋势;杂类草生物量显著增加(P<0.05);草地质量和生产力明显降低。

关键词: 高寒草地, 植物群落, 优势种, 草地质量