Establishment and growth of Lolium multiflorum for phyto-remediation of Pb/Zn tailings The Role of Stem Nodules in the Adaptation of Sesbana rostrata to a Pb/Zn Tailings Environment I.Effects on Growth Analysis of major constraints on plant colonization at Fankou Pb/Zn mine tallings The Effects of Nutrition Polybag on the Growth, N-fixation and Heavy Metal Accum ulation of Sesbania rostrata Grown on Pb/Zn Tailings