高碳木灰生物炭增强了土著树木的生存和生长,在沙顶的矿山尾矿上
Jasmine M Williams1, Sean C Thomas2
1Institute of Forestry and Conservation, John H Daniels Faculty of Architecture Landscape and Design, University of Toronto, 33 Willcocks St., Toronto, M5S 3B3, Canada. jasmine.williams@mail.utoronto.ca.
概括
高碳木灰生物炭 (HCWAB) 显示出对矿场恢复的承诺,在低至中等剂量下改善树木生存和生长. 然而,较高的应用率可以减少树木的存活率,因为植被竞争增加.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 林业林业 林业 林业 林业
背景情况:
- 木灰生物炭 (HCWAB) 提供了改善土壤和重新造林的潜力.
- 矿山废弃物需要有效的恢复策略来进行重新造林.
研究的目的:
- 评估HCWAB对土著树木生存和生长对沙顶矿山尾矿的影响.
- 评估HCWAB对树木基质特性和元素吸收的影响.
主要方法:
- 一个大规模的,复制的实地试验在加拿大的金矿中进行.
- 在用HCWAB修改的废弃物上种植了四种本地树种,剂量不同 (019.1t/ha).
- 在两年内监测了树木的生存,生长,基质化学和元素吸收.
主要成果:
- 树木存活率在低至中等HCWAB率 (6.412.8t/ha) 时最高,在较高率 (>13t/ha) 时下降.
- 与对照组相比,所有的HCWAB剂量都改善了树木的生长.
- 随着较高的HCWAB剂量增加的志愿者植被,由于竞争,对树木的性能产生了负面影响.
- 没有观察到树木组织或基质中潜在有毒金属 (Cd,Cu,Al) 的显著增加.
结论:
- 低至中度的HCWAB应用 (6.412.8t/ha) 有利于矿山尾矿的早期树木生存,生长和土壤营养.
- 较高的HCWAB率可能会增加植被竞争,阻碍树木的建立.
- 在没有显著的植物毒性风险的情况下,HCWAB显示了矿场恢复的潜力,但竞争管理至关重要.
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