重种本地物种通过增加干旱地区的功能多样性,间接增强退化的沙漠草原的稳定性
Xin Gong1, Haixin Jiang1, Yao Zhou1
1Research Center for Grassland and Animal Husbandry Engineering Technology of Ningxia Province, Ningxia University, 489 Helanshan West Road, Yinchuan, 750021, Ningxia, China; Key Laboratory for Model Innovation in Forage Production Efficiency, Ministry of Agriculture and Rural Affairs, PR China, Ningxia University, 489 Helanshan West Road, Yinchuan, 750021, Ningxia, China; Ningxia University, School of Forestry and Grassland Science, 489 Helanshan West Road, Yinchuan, 750021, Ningxia, China.
Journal of environmental management
|December 6, 2025
概括
用本地物种重新种植退化沙漠草原,特别是包括Agropyron desertorum,Agropyron mongolicum和Astragalus melilotoides在内的三种物种组合,通过改善功能多样性和土壤特性间接增强生态稳定性. 这种优化的再播种策略为干旱土地恢复提供了一种机械方法.
科学领域:
- 生态生态学 生态生态学
- 恢复生态学 恢复生态学
- 牧场科学 牧场科学
背景情况:
- 干旱地区的退化沙漠草原因草原产量和料质量下降而受到影响.
- 用本地物种长期再种植是一种改善这些生态系统的策略,但其对社区稳定机制的影响尚未完全理解.
研究的目的:
- 调查使用不同组合本地草和豆类物种重新种植对退化沙漠草原中植物群体结构和稳定性的影响.
- 阐明重新种植影响植被动态和土壤特性以实现生态恢复的机制.
主要方法:
- 在一个退化的沙漠草原中,重新种植五种本土物种 (Agropyron desertorum,A. mongolicum,Lespedeza pataninii,Astragalus laxmannii,A. melilotoides) 的六种组合,使用自然封闭的草原作为控制 (CK).
- 分析植物群体属性 (物种多样性,功能多样性指数,如FRic,FEve,FDis) 和土壤属性 (总,可用的,总,电导率,含水量).
- 评估跨物种关联及其与土壤植物反和社区稳定性的关系.
主要成果:
- 与对照组相比,重新播种处理显著提高了植物的定量特征,三种组合显示出高于两种组合的多样性指数.
- 在Agropyron desertorum + Agropyron mongolicum + Astragalus melilotoides的组合中显示出最高的功能丰富性,而Agropyron desertorum + Agropyron mongolicum + Lespedeza pataninii则显示出最大的功能均性.
- 种类多样性与土壤营养素和电导率相关;功能多样性和跨种类关联与土壤含水量和总有关. 鉴于Agropyron desertorum + Agropyron mongolicum + Astragalus melilotoides的组合被认为是最适合康复的.
结论:
- 重种,特别是通过特定的多种组合,通过改善功能多样性和土壤特性,间接增强退化的干旱草原的生态稳定性.
- 该研究提供了恢复生态稳定的机制基础,通过展示不同草种组合如何重塑社区结构并加强土壤-植物反.
- 优化Agropyron desertorum,Agropyron mongolicum和Astragalus melilotoides的组合为有效的干旱土地恢复提供了一个有希望的战略.
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