土壤有机质分解的温度敏感性:培养与测定模式

土壤有机质分解的温度敏感性(Q_(10))不仅是生态学和土壤学研究的核心科学问题之一,也是全球变化生态学研究的热点领域。国内外学者对Q_(10)的影响因素或机制开展了大量卓有成效的研究工作,并有不少相关的综述或展望;然而,迄今为止有关培养与测定模式的探讨却非常少。鉴于培养和测定模式对研究结果的重要性,在简要描述Q_(10)定义、基本理论和计算方法的基础上,重点比较了当前Q_(10)研究的不同培养和测定模式及其优缺点。结合最新研究进展,重点介绍了新发展的连续变温培养+连续自动测试模式,并简要阐述了新模式的应用前景。通过探讨,希望能为国内从事Q_(10)研究的学者提供一定的经验与借鉴;同时,希望能引起青年科研人员重视研究方法、技术和仪器的研发,更好更快地推动原创性研究。

Temperature sensitivity of soil organic matter decomposition: New insights into models of incubation and measurement

The temperature sensitivity (Q₁₀) of soil organic matter decomposition is not only one of the core issues in ecology and soil science but also one of the key topics in global change ecology. Some scientists have studied the underlying mechanisms and factors that influence Q₁₀ using empirical methods. However, few previous studies considered the methods used for soil incubation and soil respiration measurement. In this study, we briefly introduce the theory and methods by which Q₁₀ is calculated. We examine advantages and disadvantages of two approaches commonly used in soil incubation and soil respiration measurement. Furthermore, we describe a newly developed method that includes continuous incubation with variable temperature and rapid automatic measurement. Finally, we discuss the potential applications of this novel approach, which can result in a more accurate determination of Q₁₀. More importantly, we emphasize the need for young scientists in China to critically examine their methodology, as well as to develop new instrumentation and integrate new technology into their research