Copper bioavailability and phytotoxicity as assessed in situ for durum wheat cultivated in Cu-contaminated, vineyard soils

摘要：

Copper bioavailability and phytotoxicity were assessed in situ for durum wheat cultivated in Cu- contaminated, vineyard soils that covered a wide range of pH (4.2-7.8) and total copper content (32- 1030mg(Cu)·kg<-1>). Copper content in plants varied between 6 and 39 mg(Cu) ·kg<-1> in shoots and between 11 and 705 mg(Cu)· kg<-1> in roots. The highest Cu contents in plants were found in calcareous soils. Moreover, symptoms of Fe chlorosis were observed in calcareous soils, particularly at high Cu contents in soils and plants. In acidic soils, an increase in rhizosphere pH was found to be related to a decrease in Cu solubility. The results of this study suggested that Cu might be more bioavailable and even more phytotoxic in calcareous soils than in acidic soils. In addition, Cu phytotoxicity in calcareous soils seemed to be linked to Fe deficiency in durum wheat.

关键词： bioavailability copper durum wheat iron pH phytotoxicity

作者: A. Michaud M. Bravin M. Galleguillos P. Hinsinger

作者单位: UMR 1222 Rhizosphere & Symbiose INRA-Agro. M, Place Viala, 34060 Montpellier cedex 1, France

会议类型: 国际会议

会议名称: 第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)

会议地点: 北京

会议语种:英文

页码: 990-991

在线出版日期: 2007-07-15（万方平台首次上网日期，不代表论文的发表时间）