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在氮沉降和硫沉降增加的背景下,土壤氮素可利用性增加和土壤酸化是多数陆地生态系统正在经历的两个重要生态学过程。氮沉降和硫沉降的增加以及两者之间的耦合作用对土壤呼吸会产生扰动,进而很大程度上可能影响到森林生态系统的碳收支。本文综述了氮沉降和硫沉降对土壤呼吸的影响及机制,分析了氮沉降与硫沉降的耦合作用,指出了目前森林生态系统土壤呼吸对氮沉降和硫沉降响应研究的薄弱环节以及今后相关领域的重点研究方向。
In the context of increased nitrogen deposition and sulfur deposition, increased availability of soil nitrogen and soil acidification are two important ecological processes that most terrestrial ecosystems are undergoing. Nitrogen deposition and the increase of sulfur deposition and the coupling between the two can cause disturbance to soil respiration, which may affect the carbon budget of forest ecosystem to a great extent. In this paper, the effects and mechanisms of nitrogen deposition and sulfur deposition on soil respiration were reviewed. The coupling between nitrogen deposition and sulfur deposition was analyzed. The current weak points in the response of soil respiration to nitrogen deposition and sulfur deposition in the forest ecosystem were pointed out. The focus of research.