文献类型：期刊文献

中文题名：干旱背景下森林根系分泌物及其介导的碳氮循环研究进展

英文题名：Progress on forest root exudates and their mediated carbon and nitrogen cycling under drought

作者：吴生光[1,2] 陈琳[2] 刘世荣[3] 席英卓[2] 杨坤[2] 李华[2] 闵惠琳[2] 黄婷[2]

第一作者：吴生光

机构：[1]中国林业科学研究院,北京100091;[2]中国林业科学研究院热带林业实验中心,广西友谊关森林生态系统国家定位观测研究站,广西凭祥532600;[3]中国林业科学研究院森林生态环境与自然保护研究所,国家林业和草原局森林生态环境重点实验室,北京100091

年份：2025

卷号：44

期号：10

起止页码：3470-3480

中文期刊名：生态学杂志

外文期刊名：Chinese Journal of Ecology

收录：;北大核心:【北大核心2023】；

基金：国家重点研发计划(2023YFE0105100-1);中央级公益性科研院所基本科研业务费专项资金(CAFYBB2023MB035)资助。

语种：中文

中文关键词：干旱;森林生态系统;根系分泌物;碳循环;氮循环

外文关键词：drought;forest ecosystem;root exudate;carbon cycling;nitrogen cycling

分类号：S718.5

摘要：随着全球气候变化加剧,干旱面积、强度和频率持续增加,根系分泌物的含量和组成(如糖类、氨基酸和有机酸)会发生变化,进而影响森林碳氮养分循环。然而,根系分泌物含量及其组分如何随干旱强度和树种类型而变化,以及干旱下根系分泌物介导碳氮循环的作用和调控机制尚不明确。因此,本文首先探讨了不同干旱强度对森林根系分泌物含量和组成的影响,以及不同树种的根系分泌物的响应差异。其次,从土壤碳和氮两个方面,分析了干旱下根系分泌物对土壤碳氮循环的介导效应。最后,建议未来应重点加强以下四个方面的研究:(1)不同干旱强度及恢复后对森林根系分泌物组成和含量的影响;(2)根系分泌物介导的土壤激发效应;(3)根系分泌物介导的碳氮循环的微生物调控机制;(4)根系分泌物介导的种内与种间相互作用。
With the intensification of global climate change,the area,intensity,and frequency of droughts continue to increase.The content and composition of root exudates(such as sugars,amino acids,and organic acids)will change,thereby affecting carbon and nitrogen cycling in forests.However,how the content and composition of root exudates vary with drought intensity and tree species,as well as the mechanisms of root exudates in mediating carbon and nitrogen cycles under drought conditions,remain unclear.Therefore,we first summarized the effects of drought intensity on the content and composition of forest root exudates and the responses of root exudates across different tree species.Secondly,the mechanisms of root exudates on soil carbon and nitrogen cycles under drought conditions were analyzed from two aspects of soil carbon and nitrogen.Finally,it is suggested that future research should focus on strengthening the following four aspects:(1)the effects of different drought intensities and recovery on the composition and content of forest root exudates;(2)the soil priming effect mediated by root exudates;(3)the microbial regulation mechanisms of carbon and nitrogen cycles mediated by root exudates;(4)the intra and inter-specific interactions mediated by root exudates.