Phytoavailability of Copper, Zinc and Cadmium in Sewage Sludge-Amended Calcareous Soils

作     者：LI Qiong GUO Xue-Yan XU Xing-Hua ZUO Yu-Bao WEI Dong-Pu MA Yi-Bing 

作者机构：The Key Lab of Resource Environment and GISthe College of Resource Environment and TourismCapital Normal UniversityBeijing 100048(China) Ministry of Agriculture Key Laboratory of Plant Nutrition and Nutrient CyclingInstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081(China) 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2012年第22卷第2期

页      面：254-262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] 09[农学] 0818[工学-地质资源与地质工程] 0903[农学-农业资源与环境] 0901[农学-作物学] 

基　　金：Supported by the Beijing Drainage Group Co. Ltd. and the Special Fund for Agro-Scientific Research in the Public Interest of China (No. 200903015) 

主　　题：植物有效性 石灰性土壤 污水污泥 修订 铜 锌 镉(Cd) 田间试验 

摘      要：The toxicity of trace elements (TEs), such as copper (Cu), zinc (Zn), and cadmium (Cd), often restrict land application of sewage sludge (SS) and there was little information about soil-plant transfer of TEs in SS from field experiments in China. In this study pot and field experiments were carried out for 2 years to investigate the phytoavailability of TEs in calcareous soils amended with SS. The results of the pot experiment showed that the phytoavailability of Zn and Cu in the SS was equal to 53.4%-80.9% and 54.8%-91.1% of corresponding water-soluble metal salts, respectively. The results from the field experiment showed that the contents of total Zn, Cu, and Cd in the soils increased linearly with SS application rates. With increasing SS application rates, the contents of Zn and Cu in the wheat grains initially increased and then reached a plateau, while there was no significant change of Cd content in the maize grains. The bioconcentration factors of the metals in the grains of wheat and maize were found to be in the order of Zn Cu Cd, but for the straw the order was Cd Cu Zn. It was also found that wheat grains could accumulate more metals compared with maize grains. The results will be helpful in developing the critical loads of sewage sludge applied to calcareous soils.