Fractionation of Zn,Cd and Pb in a Tropical Soil After Nine-Year Sewage Sludge Applications

作     者：T.A.R.NOGUEIRA W.J.MELO I.M.FONSECA S.A.MARCUSSI G.M.P.MELO M.O.MARQUES 

作者机构：Department of Plant NutritionCenter for Nuclear Energy in AgricultureUniversity of Sao Paulo Department of TechnologySao Paulo State University 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2010年第20卷第5期

页      面：545-556页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：Supported by the Sao Paulo State Research Foundation(FAPESP) Brazil and the master scholarship granted to the first author(No.06/54620-6) 

主　　题：heavy metals humic substance sequential extraction Zea mays L. 

摘      要：A long-term field experiment was carried out in the experiment farm of the Sao Paulo State University,Brazil,to evaluate the phytoavailability of Zn,Cd and Pb in a Typic Eutrorthox soil treated with sewage sludge for nine consecutive years,using the sequential extraction and organic matter fractionation *** 2005-2006,maize(Zea mays L.) was used as test plants and the experimental design was in randomized complete blocks with four treatments and five *** treatments consisted of four sewage sludge rates(in a dry basis):0.0(control,with mineral fertilization),45.0,90.0 and 127.5 t ha-1,annually for nine *** maize sowing,the sewage sludge was manually applied to the soil and incorporated at 10 cm *** samples(0-20 cm layer) for Zn,Cd and Pb analysis were collected 60 days after *** successive applications of sewage sludge to the soil did not affect heavy metal(Cd and Pb) fractions in the soil,with exception of Zn *** Zn,Cd and Pb distributions in the soil were strongly associated with humin and residual fractions,which are characterized by stable chemical ***,Cd and Pb in the soil showed low phytoavailability after nine-year successive applications of sewage sludge to the soil.