摘要
白羊草(Bothrichloa ischaemum(L.)Keng)群落在陕北黄土高原主要分布在森林草原北限以南地区(图1),我们选择生态条件和白羊草群落特征均具代表性的蔡家川(黄龙县)为观测点,布置测定样地,样地面积1×2(m^2)。采用分层刈割法。
This paper deals with the seasonal and spacial change of the biomass of aboveground and underground part in Bothriochloa ischaemum community. The results showed obvious biomass seasonal dynamics in B. ischaemum community. The biomass of aboveground achieved peak value (314.66g/m^2) in the mid-September. The biomass of underground was minimum during flourishing period and maximum during the withering period. Such change in biomass is re-levent to the developmental stage's and transport of organic materials.
基金
国家自然科学基金资助课题
关键词
黄土高原
生物量
白羊草
群落
Loess plateau
Bothrtochloa ischaemunity community
Biomass
