2KALIS E J J,TEMM INGHOFF E J M,VISSER A,etal. Metal up take by Lolium perenne in contaminated soils using a four-step approach [J].Environ Toxicol Chem, 2007,26(2):335-345.
3SIMMONS R W,NOBLE A D,PONGSAKUL P,etal. Analysis of field moist Cd contaminated paddy soils during rice grain fill allows reliable prediction of grain Cd levels [ J ].Plant Soil, 2008,302,125-137.