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主要由肥料管理引起的土壤可用基质的变化,比微生物社区的热适应更为促进了土壤呼吸温度的敏感性
Zhibin Guo1, Chang-An Liu2, Keke Hua1
1Soil and Fertilizer Research Institute, Anhui Academy of Agricultural Sciences, Hefei, Anhui 230031, China; Key Laboratory of Nutrient Cycling and Resources Environment of AnHui Province, Hefei, Anhui 230031, China.
The Science of the total environment
|December 7, 2023
概括
土壤呼吸系统 土壤呼吸系统
科学领域:
- 土壤科学 土壤科学
- 微生物学 微生物学
- 生态生态学 生态生态学
背景情况:
- 土壤呼吸的温度敏感性 (Q10) 是由基质可用性和微生物适应性来调节的.
- 实验室化限制了在自然条件下对Q10的理解.
- 基质和微生物群落在调节Q10中的相互作用仍然不清楚.
研究的目的:
- 研究可用的基质和微生物群落如何在自然变暖下调节土壤呼吸的Q10.
- 分析季节性变暖对土壤呼吸和微生物适应的长期影响.
主要方法:
- 进行了为期两年的季节性变暖实验.
- 用平方根方法测量土壤呼吸,并计算Q10.
- 分析了土壤可用的基板和微生物社区的热适应.
主要成果:
- 土壤呼吸的Q10更多地受到可用的基质的影响,而不是微生物的热适应.
- 施肥管理显著影响了土壤的可用基质,而不是温度.
- NH4-N对细菌Q10调节至关重要,而溶解的有机碳和对真菌群落至关重要.
结论:
- 可用和溶解有机碳的受肥驱动的变化是土壤呼吸的Q10的主要调节者.
- 细菌和真菌群体表现出不同的热适应机制.
- Q10监管涉及专家,通用和中立的微生物社区.
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