草地生态系统呼吸研究进展

生态系统呼吸是草地生态系统碳交换过程的主要环节,也是草地生态系统中有机碳以CO2形式排放到大气中的主要途径。本文通过分析和总结已有研究的相关成果,探讨了国内外生态系统呼吸的不同测定方法以及影响草地生态系统呼吸的主要因素,揭示了现有研究中普遍存在的单一化研究方法以及单因素试验研究手段对生态系统呼吸研究结果产生不确定性。为准确估算生态系统呼吸值,建议以多因素交互试验作为主要研究手段,并采取不同测定方法,长期开展野外观测研究。

Research progress on ecosystem respiration in grasslands

Ecosystem respiration is the main process in the carbon exchange in grassland ecosystems and the main pass way for organic carbon emission, in the form of CO2, from grassland ecosystems to the atmosphere. Based on analyses and summarization of existing research results, this paper discussed the different measurement methods of ecosystem respiration at home and abroad, analyzed the main factors that affect the respiration of grassland ecosystems, and uncovered uncertainties in the research outcomes caused from single factorial study design and singular measurement methods that were commonly seen in the previous reports. In order for an accurate estimation in the ecosystem respiration value, it is, therefore, suggested that the design for studies should be multi-factorial with interactions, and the methods for measurements should be diverse and long term.