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矿石尾矿损害了树木物种的植物发展,光合作用活动和营养
Maria Gracielle Rodrigues Maciel1, Nayara Magry Jesus Melo2, Gustavo Júnio Santos Oliveira2
1Gradute Program in Ecology, Federal University of Viçosa (UFV), Campus Florestal, Florestal, Minas Gerais, 35690-000, Brazil. gracielle.eco@gmail.com.
Environmental science and pollution research international
|September 2, 2024
概括
选择合适的树木对于恢复因 (Li) 开采而退化的土地至关重要. 一些物种,如Hymenaea courbaril,对矿石尾矿表现出耐受性,并有可能进行植物修复.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 生物地质化学生物地质化学
背景情况:
- (Li) 的开采推动了经济增长,但造成了严重的环境破坏.
- 恢复受矿开采影响的生态系统需要仔细选择植物物种.
- 了解植物对矿尾矿 (LOT) 的耐受性对于有效的土地回收至关重要.
研究的目的:
- 为了评估四种树种的早期生长和耐受性,对LOT.
- 评估LOT对植物生理学,生长和矿物营养的影响.
- 在受影响地区确定适合植物修复的树种.
主要方法:
- 四种树种 (Enterolobium contortisiliquum,Handroanthus impetiginosus,Hymenaea courbaril,H. stigonocarpa) 在LOT和土壤中长了255天.
- 评估的植物参数包括光合作用,生长 (茎和根的长度,生物量) 和矿物营养.
- 评估的叶绿素含量,量子效率和金属积累 (Li,Mg,K,Mn).
主要成果:
- 由于结构和营养不佳,LOT显著抑制了植物生长,减少了茎和根的长度和生物量.
- 很多改变了矿物质营养,增加了 (Mg) 和减少 (K) 的吸收.
- 大多数物种的光合作用效率 (量子效率,叶绿素指数) 降低;E. contortisiliquum表现出最少的耐受性,而H. courbaril和H. stigonocarpa表现出更大的耐受性.
- H. courbaril 证明了具有 >1.1 的转位因子的和 (Mn) 植物提取潜力.
结论:
- 在矿尾矿中,Hymenaea courbaril和H. stigonocarpa比E. contortisiliquum和H. impetiginosus更能耐受矿尾矿.
- 在受采矿影响的环境中,H. courbaril显示出和的植物修复潜力.
- 基于耐受性和植物提取能力的物种选择是矿开采后成功生态恢复的关键.
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