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植被恢复抑制了高海拔黄金矿区的废渣堆上的流侵蚀

Changxing Zhao¹, Wenbo Mou², Jinrong Liu¹

¹State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, China.

The Science of the total environment

|December 23, 2023

概括

人工植被有效地控制了高海拔矿山中的土壤侵蚀. 混合植物 (MM) 和Elymus dahuricus (ED) 种植物减少了溪流侵蚀,MM显示了持续的有效性. 植物根是减少侵蚀模块的关键.

科学领域:

环境科学环境科学
土壤科学土壤科学
生态生态学生态生态学

背景情况:

土壤侵蚀和退化威胁着土地资源,工业生产和生态可持续性.
在高海拔采矿地区,岩侵蚀是主要关注的问题,但其特征和影响机制尚不清楚.
了解河流侵蚀动态对于有效的土地回收和破坏生态系统的生态恢复至关重要.

研究的目的:

调查不同植被恢复模式和时期对西藏高原黄金矿的下流侵蚀特征的影响.
分析地形,土壤和植被对河流侵蚀模量 (REM) 的直接和间接影响.
在植被恢复过程中,确定驱动流侵蚀模量减少的关键因素.

主要方法:

现场数据采集于两个金矿的96个下坡地块,按植被类型 (自然恢复,Elymus dahuricus,Medicago sativa,多植物混合) 和恢复年龄 (1-6年) 分类.
分析了7个水形态和发育指标.
应用部分最小平方结构方程建模 (PLS-SEM) 来评估15个指标 (地形,土壤,植被) 对REM的影响.

主要成果:

人工植被显著抑制了沟的发展,与自然恢复相比,减少了更宽,更深的沟的频率.
多植物混合 (MM) 和Elymus dahuricus (ED) 种植物比Medicago sativa (MS) 在控制河流侵蚀方面更有效.
毫米表现出一致的强烈抑制,而ED的有效性随着时间的推移而下降;地形,土壤和植被都影响了REM.

结论:

人工植被恢复是一种可行的策略,用于缓解高海拔采矿区的下流侵蚀.
多植物混合 (MM) 植被模式提供了最强大的和持续的控制流侵蚀.
植物根功能特征是减少流侵蚀模量的主要驱动因素,通过土壤特性修改直接和间接地起作用.

关键词:

植物根的功能特征植物根的功能特征恢复时期是恢复时期.里尔尔的发展.植被恢复模式植被恢复模式

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