Stipa plants,distributed in arid and semi-arid regions,are sensitive to drought caused by the decrease of precipitation and changes of other climatic factors. What the effects of global change on Stipa plants were studied would help to understand the response and adaptability of zonal steppe plants to global change in Inner Mongolia. The impacts of elevated CO2,warming and precipitation change on five zonal and constructive Stipa species( S. Baicalensis,S. bungeana,S. grandis,S. krylovii and S. breviflora) ...