羊草草原群落生物量季节动态研究

Study on Seasonal Fluctuations or Biomass For Leymus chinensis Grassland.

通过对分布于内蒙古高原中部东南地区羊草草原群落地上、地下生物量季节动态的研究表明，羊草群落和羊草种群地上生物量积累呈“Ｓ”型曲线，地下生物量积累呈“双峰型”曲线，地上、地下总生物量积累呈“Ｓ”型曲线。根据测定数据建立了地上生物量积累拟合曲线的数学表达式，地上、地下生物量垂直分布指数方程及地上生物量与水热因子关系的多元回归方程。

Seasonal dynamics of aboveground biomass and underground biomass ,distribution of underground and adoveground biomass, relationship between aboveground biomass andenvironmental factors in Leymus chinensis grassland were studied.Results show that thecurve of aboveground biomass as the shape ofS”,and underground biomass as double-peak curve The total biomass of aboveground and underground biomass changes as theshape of“S”,Imitating mathematical madels for the community and Leymus chinensisprimary production,distribution of aboveground and underground biomass ,totalbiomass of aboveground and underground were established.The multiple regression e-quation of aboveground biomass increasing with precipitation and cumulative tempera-ture were estahlished.