中文摘要：

细根是调节生态系统C平衡的主要组分之一，大气CO2浓度升高对细根影响研究已成为当前全球变化背景下关注的热门课题之一，为此从以下几个方面就大气CO2浓度升高对细根的影响研究进展进行了综述：（1）CO2浓度升高对细根生长动态的影响；（2）CO2浓度升高对细根生理特性的影响；（3）CO2浓度升高对细根组分、分泌物、菌根的影响。由于细根生长受较多因素影响，使得研究结果也表现多样性，此外目前的研究技术和方法也存在一些缺陷，因此如何在非干扰环境条件下开展CO2浓度升高对细根影响的研究，是当前研究地下生态学过程面临的难题之一。

英文摘要：

Fine root is one of major component of plants, regulating balance of carbon in ecosystem. The effects of elevated atmosphere CO2 in atmosphere on fine roots is becoming an important topic in study of background of global change. Because of this, this paper reviews influences of elevated atmosphere CO2 on fine roots in the past years. In generally, （ 1 ） the effects of elevated atmosphere CO2 on dynamics of fine root growth; （2） the effects of elevated atmosphere CO2 on physiological characters of fine root ; （ 3 ） the effects of elevated atmosphere CO2 on the fine root components, exudates and mycorrhiza. Because the growth of fine roots is influenced by muhi-factors, the studying results are of very diverse. Besides, there also are some shortcomings in experimental technology and methodology that are being applied at present. Therefore, how to study the effects of elevated atmosphere CO2 on fine roots in the undisturbed conditions is still a big challenge that needs to be tackled by researchers who are concerning about belowground ecological processes.