Response of growth and morphology of seedlings of \%Artemisia ordosica\% Krasch.,a dominant shrub in Maowusu snadland,to the global precipitation change was studied by observing its response to four artificially controlled water supply levels.The results show that different levels of water supply significantly affected biomass and its distribution of different organs,branch morphology and leaf and fine root distribution of the seedlings.Whith the increase of water supply,the biomass,tree height,total branch...