大气氮沉降增加对树木生长和水碳利用的影响

Effects of Increased Atmospheric Nitrogen Deposition on Tree Growth and Water and Carbon Utilization

森林在全球碳循环和维持全球气候方面发挥关键作用,是陆地生态系统的重要组成部分。在全球氮沉降加剧的背景下,森林生态系统树木生长和水碳利用关系已成为生态领域的一个热点问题。从树木地上地下生长、生物量分配、碳同化利用和分配以及水分利用效率几个方面概述了大气氮沉降增加对森林生态系统的影响,分析讨论了树木生长和水碳利用对大气氮沉降增加的响应,并基于当前研究存在的问题,展望了重点研究方向,以期为全球气候变化背景下森林生态系统相关研究提供有益参考。

Forests are an important part of terrestrial ecosystems,playing a key role in the global carbon cycle and maintaing the global climate.In the context of increasing global nitrogen deposition,the relationship between tree growth and water and carbon utilization in forest ecosystems has become a hot issue in the ecological field.On the basis of the relevant research at home and abroad,we summarized the impact of the increase of atmospheric nitrogen deposition on forest ecosystem from the aspects of tree aboveground and underground growth,biomass distribution,carbon assimilation,utilization and distribution and water use efficiency,and analyzed the response of tree growth and water carbon utilization to the increase of atmospheric nitrogen deposition,in order to provide some comprehensive reference for the relevant research of forest ecosystem under the background of global change.