Dynamics of the Aboveground Biomass Yield of the Caragana Stenophylla- Stipa spp. Community on Desert Grassland in Mu Us Sandland

Monthly observation of the Caragana Stenophylla-Stipa spp. community aboveground biomass at desert grassland in Mu Us Sandland was made during 1985～1991 and monthly muti-regression models were presented. Precipitation,temperature and sunshine hour is shown to play different role during plant growth and water is the main restricted variable influencing plant growth. The range of biomass change under three different climatic conditions is predicted by applying the monthly models. To show the advantage of the monthly models to the traditional simulated model, the simulated biomass by monthly models and accumulative model were compared.