[Objective]To compare the optimum water gradient for seedlings growth of four species of desert plants,to summarize the seedling management methods for those native tree species in Alxa League.[Method]Four representative annual seedlings of native desert plants in Alxa League were selected from the field such as Lycium ruthenicum Murr.,Calligonum arborescens Litv.,Hedysarum scoparium,Haloxylon ammodendron. Field trials with different water gradients during growth period were conducted. The soil moisture con...