菌根真菌对土壤呼吸以及凋落物分解的影响

The effect of mycorrhizal fungi on soil respiration and litter decomposition

摘要:

土壤呼吸是植物固定的碳由陆地生态系统进入大气的主要途径之一; 凋落物分解是养分循环的重要环节。陆地植物的90%以上可同菌根真菌形成共生关系, 菌根真菌对于植物获取环境中的养分具有重要的作用。然而, 其对土壤呼吸和凋落物分解的影响却经常在生态系统对环境变化的响应研究中被忽视。本文系统地综述了国内外相关研究进展, 对菌根真菌如何影响土壤呼吸和凋落物分解这两个过程及这种影响如何受到环境变化的制约做了全面的分析, 并对以往研究中存在的问题以及未来的研究方向提出了展望。

Abstract:

Soil respiration is the primary pathway by which plant-fixed CO2 is released back to the atmosphere. Litter decomposition is the key process of nutrient cycling in terrestrial ecosystem. Most terrestrial plants have symbiotic mycorrhizal fungi, which distributed throughout all the terrestrial ecosystems. However, most of the previous studies have been conducted on its contribution to nutrient cycling. The contributions of mycorrhizal fungi to soil carbon release and litter decomposition were poorly understood. In this paper, we systematically reviewed the progress at home and abroad and comprehensively analyzed how the mycorrhizal fungi influenced carbon release and decomposition and its involving mechanisms. Finally, we pointed out the major problems in the previous studies and raised the future scientific directions.