不同菌根树种土壤有机碳储量及调控机制的研究进展

A Review on Soil Organic Carbon Stocks and Regulation Mechanisms Between Different Mycorrhizal Trees

森林土壤有机碳库(SOC)是全球碳循环和陆地生态系统的重要组成部分,对气候变化有重要影响。几乎所有的森林树木根系都与丛枝菌根(AM)或外生菌根(ECM)真菌共生,但2种菌根树种的土壤碳循环存在差异。本文综述了目前研究中2种菌根树种土壤SOC储量存在差异的原因,总结了调控不同菌根树种SOC分解的机制以及可能在区域尺度上的变异,展望了未来菌根树种SOC的研究方向和热点,旨在为精准预测菌根真菌对森林土壤碳汇的影响提供参考。

Forest soil organic carbon(SOC)pool is a key component in global carbon cycles and terrestrial ecosystems,which plays a vital role on climate change.Nearly all tree species develop symbiotic relationships with either arbuscular mycorrhizal(AM)or ectomycorrhizal(ECM)fungi to acquire nutrients from soils,but there were differences in soil carbon cycling between the two mycorrhizal species.This paper reviewed the reasons for the differences in SOC stock between the two mycorrhizal tree species,summarized the mechanism of regulating SOC decomposition of different mycorrhizal tree species and their possible variations at the regional scale,and looked forward to the future research direction and hotspots of mycorrhizal tree SOC,aiming to provide a helpful reference for accurately predicting the impact of mycorrhizal fungi on forest soil carbon sinks.