6Wyttenbach A,Furrer V,Schleppi P,et al.Rare earth elements in soil and in soil-plants [J].Plant and Soil,1998,199:267.
7Li Fuliang,Shan Xiaoquan,Zhang Tianhong.Evaluation of plant availability of rare earth elements in soils by chemical fractionation and multiple regression analysis [J].Environmental Pollution,1998,102:269.
8Hideyoshi Morita,Ryo Tatsukawa.Rare earth elements(REEs) in naturally grown plants in relation to their variation in soils [J].Environmental Pollution,1992,76:157.
8He Y W, Loh C S. Cerium and lanthanum promote floral initiation and reproductive growth of Arobidopsis thaliana [J] . Plant Science, 2000, 159 (1) : 117 -124.
