The effects of warming on root exudation and associated soil N transformation depend on soil nutrient availability

doi:10.1016/j.rhisph.2020.100263

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所

	The effects of warming on root exudation and associated soil N transformation depend on soil nutrient availability
	Wang, Qitong 1,2,3; Chen, Lanying 2; Xu, Hang 2; Ren, Kexin 2; Xu, Zhenggang 2; Tang, Ying 2; Xiao, Juan 2
刊名	RHIZOSPHERE
	2021-03-01
卷号	17 页码:7
关键词	Warming Soil nutrient availability Root exudation Soil N transformation Subalpine coniferous forest
DOI	10.1016/j.rhisph.2020.100263
通讯作者	Xiao, Juan(xiaojuanhj@163.com)
英文摘要	Although it has been realized that the maintenance of forest ecosystem structure and function and its response to environmental changes are closely related to root exudation, the effects of warming and soil nutrient availability on the root exudate carbon (C) inputs and soil nitrogen (N) transformation related microbial processes are still not well understood. In this study, a randomized block experiment with two temperatures (control and ambient + 3.5 degrees C) and two nitrogen treatments (control and 25 g N m(-2)a(-1)) was conducted to collect the root exudates of P. tabulaeformis seedlings in situ and the microbial processes related to soil N transformation were simultaneously measured. We found that trees exposed to elevated temperature significantly increased their root exudate carbon input in unfertilized plots, and thus stimulating extracellular enzyme activity and enhancing N benefit. In contrast, the effect of warming on root exudate C input and associated soil N transformation greatly reduced after N addition, indicating that the effect of warming on root C cost and N benefit is regulated by the soil nutrient availability. Collectively, our results suggest that the variation in root C cost-N benefit induced by environmental changes is an important physiological regulatory mechanism for maintaining continuous forest growth. This study provides new insights into understanding nutrient maintenance mechanisms for forest productivity and functional stability under climate changes.
资助项目	National Natural Science Foundation of China[31700387] ; Research Fund for Excellence Project of China West Normal University[17YC144] ; Doctoral Scientific Research Foundation of China West Normal University[14E011]
WOS研究方向	Agriculture ; Plant Sciences
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000621753900004
资助机构	National Natural Science Foundation of China ; Research Fund for Excellence Project of China West Normal University ; Doctoral Scientific Research Foundation of China West Normal University
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/55998]
专题	中国科学院水利部成都山地灾害与环境研究所
通讯作者	Xiao, Juan
作者单位	1.Chinese Acad Sci, Chengdu Inst Biol, Ecol Restorat & Biodivers Conservat Key Lab Sichu, Chengdu 610041, Peoples R China 2.China West Normal Univ, Coll Environm Sci & Engn, Nanchong 637000, Peoples R China 3.Chinese Acad Sci, Chengdu Inst Biol, CAS Key Lab Mt Ecol Restorat & Bioresource Utiliz, Chengdu 610041, Peoples R China
推荐引用方式 GB/T 7714	Wang, Qitong,Chen, Lanying,Xu, Hang,et al. The effects of warming on root exudation and associated soil N transformation depend on soil nutrient availability[J]. RHIZOSPHERE,2021,17:7.
APA	Wang, Qitong.,Chen, Lanying.,Xu, Hang.,Ren, Kexin.,Xu, Zhenggang.,...&Xiao, Juan.(2021).The effects of warming on root exudation and associated soil N transformation depend on soil nutrient availability.RHIZOSPHERE,17,7.
MLA	Wang, Qitong,et al."The effects of warming on root exudation and associated soil N transformation depend on soil nutrient availability".RHIZOSPHERE 17(2021):7.