植物和微生物C:N:P固体测量对动物移除的反应
Feixue Yue1, Jianping Li2, Jiwei Li1
1Breeding Base for State Key Lab. of Land Degradation and Ecological Restoration in northwestern China/Key Lab. of Restoration and Reconstruction of Degraded Ecosystems in northwestern China of Ministry of Education, Ningxia University, Yinchuan, Ningxia 750021, China; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, College of Soil and Water Conservation Science and Engineering (Institute of Soil and Water Conservation), Northwest A&F University, Yangling, Shaanxi 712100, China.
在草原上26年来,牲畜移除 (LR) 增加了植物和微生物的碳,和. 然而,这种长期的恢复策略加剧了植物和微生物社区的限制.
科学领域:
- 生态生态学 生态生态学
- 生物地质化学生物地质化学
- 恢复生态学 恢复生态学
背景情况:
- 草原生态系统面临着退化,影响关键功能.
- 营养循环 (碳,,) 和静态测量对于生态系统的稳定至关重要.
- 牲畜移除 (LR) 是一种恢复退化的草原的策略,但其对营养限制的长期影响尚未完全理解.
研究的目的:
- 在Loess高原长期移除牲畜 (LR) 后,全面评估植物和微生物营养限制 (C:N:P固体测量).
- 研究LR持续时间对植物和微生物群落中碳,和含量的影响.
- 了解草原恢复期间从到的营养限制的转变.
主要方法:
- 在绿色和老化的叶子和微生物生物质中分析碳 (C), (N) 和 (P) 含量.
- 在植物和微生物群落中测量C:N,C:P和N:P比率.
- 评估细胞外酶活动和再吸收效率.
- 长期LR场地 (>26年) 与放牧场地的比较.
主要成果:
- 长期LR (>26年) 在植物和微生物群落中显著增加了C,N和P含量.
- LR导致工厂C:P和N:P比率以及P再吸收效率的提高,这表明向P限制的转变.
- 与放牧场相比,长期LR下的微生物群体经历了更大的P限制,这可以通过更高的C:P和N:P比率和减少的N-获取酶活性来证明.
结论:
- 长期移除牲畜 (>26年) 会增加草原生态系统中的营养积累.
- 长期的LR将植物群落转向恢复期间的限制.
- 该研究表明,长期的牲畜移除可能会加剧植物和微生物群落的限制,影响长期的草原继承.
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