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树干CO2释放速率(stemCO2effluxrate,FCO2)是森林生态系统碳循环的重要组成部分,其占树木自养呼吸的14%～48%。对FCO2影响因素进行分析,对于了解全球碳循环以及森林生态系统对全球变暖的响应具有重要意义。本文综述了生物因素和非生物因素对FCO2的影响,指出这些因素不仅直接或间接影响FCO2,而且各因素间还存在交互作用,此外,各因素的影响程度也会随时间、空间而变化。在此基础上,本文提出了今后研究应集中在以下几方面:(1)运用有效方法分离树干释放CO2的各个组分,并分析各个组分与影响因素的关系,深入揭示FCO2变化机制;(2)加强生物、非生物因素交互影响FCO2动态模型的研究,用以提高模拟的准确性;(3)深入探讨FCO2的温度适应性。
The stem CO2 efflux rate (FCO2) is an important component of the carbon cycle in forest ecosystems and accounts for 14% -48% of the tree autotrophic respiration. An analysis of the FCO2 influencing factors is of great importance for understanding the global carbon cycle and the response of forest ecosystems to global warming. This paper reviews the effects of biotic and abiotic factors on FCO2, and points out that these factors not only directly or indirectly affect FCO2, but also interact with each other. In addition, the influence of various factors will change with time and space. On this basis, the paper proposes that the future research should focus on the following aspects: (1) To separate the components of CO2 by effective methods and to analyze the relationship between each component and the influencing factors, reveal the mechanism of FCO2 changes; 2) To strengthen the interaction of biological and non-biological factors FCO2 dynamic model to improve simulation accuracy; (3) in-depth discussion of FCO2 temperature adaptability.