• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Annual Meeting of American Society of Mining and Reclamation >REVEGETATION OF GOLD RESIDUES IN THE EASTERN JARRAH FOREST IN THE SOUTH-WEST OF WESTERN AUSTRALIA
【24h】

REVEGETATION OF GOLD RESIDUES IN THE EASTERN JARRAH FOREST IN THE SOUTH-WEST OF WESTERN AUSTRALIA

机译：西澳大利亚南部东部Jarrah森林中金渣的再训练

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Revegetation of mine residues (tailings) is an important aspect of rehabilitation after mining, and represents a substantial investment. Therefore it is important to increase our understanding of all aspects of re-establishing a sustainable vegetation community on these materials. We report here on a multi-disciplinary, collaborative research program, focusing on vegetation establishment, soil development, and water-balance modeling on a large residue revegetation experiment. The study focused on gold residues produced at the Boddington Gold Mine (BGM) and Hedges Gold Mine (HGM), in the south-west of Australia. The residue storage areas will be rehabilitated once no longer required, but revegetation may be hampered by the alkaline, saline, and sodic properties of the residue. A large field experiment was established to examine soil amendments and capping strategies. The treatments were three depths of gravel-rich subsoil (0 cm, 15 cm, and 30 cm) overlying residue treated with gypsum (30 t/ha). All plots subsequently received an application of topsoil (10 cm). The plots were established in 1999 with species from the local jarrah (Eucalyptus marginata Donn. ex Smith) forest, or salt- and waterlogging-tolerant native species. Ten months after application, gypsum had contributed to a decrease in residue pH and salinity. By March 2000, approximately 90 percent of the directly seeded species had emerged and survived, and 100 percent of transplanted seedlings had survived. Applying gravel subsoil in addition to topsoil did not improve plant growth in the first two years. In fact, aboveground biomass production was higher, from 4 to 8.5 t/ha/yr, in the absence of a gravel subsoil. However, in the third growing season, this trend was less apparent. Plant roots were found to grow into the residue, preferentially following shrinkage cracks and exploring coarser-textured layers. Vigorous plant and root growth, and thus high plant water use, has resulted in substantial drying of the residue profile. On-going studies are examining water and salt movement through these profiles and long-term plant performance. At the same time, an overall model is being developed to predict the net water balance if the whole residue area was vegetated.
机译：矿山残留物（尾矿）的重生是采矿后康复的一个重要方面，并代表了大量投资。因此，重要的是要增加对这些材料重建可持续植被界的各个方面的理解。我们在这里报告了一项多学科，协作研究计划，重点是植被建立，土壤开发和水平模型在大型残留的植物实验上。该研究专注于Boddington金矿（BGM）和对冲金矿（HGM）的黄金残留物，在澳大利亚南部。在不再需要恢复残留物储存区域，但碱性，盐水和残留物的碱性性质可能阻碍植物储存区域。建立了一个大型田野实验，以检查土壤修正和封盖策略。该处理是用石膏（30t / ha）处理的覆盖物残留物的砾石富渣（0cm，15cm，30cm）的三种深度。所有曲线随后接受涂上表土（10厘米）的施用。这些地块于1999年成立，其中来自当地Jarrah（桉树Marginata Donn）的物种。或耐盐和耐水性的天然物种。申请后十个月，石膏有助于降低残留物pH和盐度。到2000年3月，大约90％的直接种子物种出现并幸存下来，100％的移植幼苗幸存下来。涂抹砾石底土外除了甲醛土壤外，未在前两年内没有改善植物生长。实际上，在没有砾石底土的情况下，从4至8.5吨/张/年以上，地上生物质生产较高。然而，在第三个生长季节中，这种趋势不太明显。发现植物根部生长到残余物中，优先于收缩裂缝和探索粗糙纹理层。剧烈的植物和根生长，从而高的植物用水，导致残留物的大量干燥。正在进行的研究通过这些曲线和长期植物性能来检查水和盐运动。同时，如果整个残留区植被，正在开发整体模型以预测净水平衡。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号