氮沉降对森林细根动态和形态影响的研究进展

Research Progress on Effects of Nitrogen Deposition on Dynamics and Morphology of Forest Fine Roots

近年来,大气氮沉降的急剧增加是全球气候变化研究的焦点,它对生态系统的影响极大。本文通过综述国内外学者的研究成果,表明了氮沉降现象是呈现连年增加趋势的状态,总结了氮沉降是如何影响细根动态和形态特征,进而细根的生长动态(细根周转、呼吸、寿命)和生理生态(比根长、直径、生物量)又是如何响应生态系统中碳循环。在既有研究基础之上提供了很多N沉降影响细根动态和形态特征的证据,这些证据对于未来开展细根综合研究具有重要的借鉴意义。

In recent years, the rapid increase of atmospheric nitrogen deposition has become the focus of global climate change research, which has a great impact on the ecosystem. This paper reviews the research results of scholars at home and abroad. It shows that the phenomenon of nitrogen deposition is present in successive years increases trend status, summarized the nitrogen deposition is how to affect the dynamic and fine root morphological characteristics. Furthermore, how the growth dynamics of fine roots (turnover, respiration and life span of fine roots) and ecophysiology (specific root length, diameter and biomass) affect the carbon cycle of the ecosystem. On the basis of the existing research, many pieces of evidence of the influence of N deposition on the dynamics and morphological characteristics of fine roots are provided, which have important reference significance for the comprehensive research of fine roots in the future.