Phytostabilization of arsenic-rich gold mine tailings in the Victorian Goldfields, Australia. Water use by high value Eucalyptus trees: ecophysiological considerations

摘要：

Field experiments investigated the establishment of dryland eucalypt species in arsenic-rich sulphidic gold mine tailings. Surface capping materials which comprised benign crushed waste rock amended with topsoil or biosolids, provided a substrate favourable to initial seedling growth. Cappings also allowed roots to penetrate into the tailings. Xylem water potential measurements of plant stems showed that midday water potential (Ψmd) for all species was similar for either summer or spring measurement. This indicates that the osmotic stress did not appear to greatly compound the drought stress in tolerant tree species. The use of stable isotopes of <2> H and <18> O are currently being undertaken to relate tree water isotopic composition and to compare it with rainwater in the upper cover profiles or tailings matrix water.

关键词： Ecophysiology Eucalyptus sulphidic tailings phytostabilization arsenic

作者: A. I. Doronila D. King A. J. M. Baker S. M. Reichman I. E. Woodrow

作者单位: Applied Ecology Research Group, School of Botany, University of Melbourne, VIC 3010, Australia Plant Plant Physiology Research Group, School of Botany, University of Melbourne, VIC 3010, Australia Applied Ecology Research Group, School of Botany, University of Melbourne, VIC 3010, Australia Soil and Physical Sciences Group, Lincoln University 7647, New Zealand

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: 961-962

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）