The comparison studies of ecological and water regulation characteristics of Caragana microphylla and Caragana stenophylla Effects of NaCl stress on water metabolism, photosynthetic rate and intraneous ABA in leaves of sweet potato Effect of Soil Drought on Seedling Growth and Water Metabolism of Three Tree Species in Loess Plateau Effect of soil water stress on water metabolism and osmotic adjustment substance of native tree species of Loess Plateau