Abstract: Pot experiment was carried out for investigating the effect of slow release fertilizer(SRF) on the growth of Robinia pseudoacacia,Ulmus pumila and Crotalaria assamica.Compared that SRF could stimulate the growth of plant height,diameter at ground level and over-underground biomass of Ulmus pumila significantly,the stimulating effect for growth of Robinia pseudoacacia was comparatively low,and the growth of Crotalaria assamica had a negative relationship with the increasing of using amounts of N.The effects of total N on above-ground biomass had the same trends and total P had no significant effect.The total N in three SRF had a similar effects,but the total P had no significant effects on over-underground biomass of three species.With the direct seeding technique,leguminous plant would be the preferential species,and if the plant with non nitrogen fixation was selected,using of slow release fertilizer is a very important alternative to stimulate seeding growth.