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Warming effects on root morphological and physiological traits: The potential consequences on soil C dynamics as altered root exudation

文献类型：期刊论文

作者Yin, Huajun1,2; Xiao, Juan1,2; Li, Yufei1,2; Chen, Zhi1,2; Cheng, Xinying1,2; Zhao, Chunzhang1,2; Liu, Qing1,2
刊名AGRICULTURAL AND FOREST METEOROLOGY
出版日期2013-10-15
卷号180页码:287-296
关键词Tree species Root exudation Soil respiration Temperature sensitivity Global warming
ISSN号0168-1923
DOI10.1016/j.agrformet.2013.06.016
产权排序1
文献子类Article
英文摘要Root and rhizosphere processes contribute significantly to soil carbon (C) fluxes, yet mechanism by which they do are not well understood. One of the contributing factors to this uncertainty is the lack of understanding about the role of root-derived labile C inputs in influencing soil organic matter (SUM) decomposition. We conducted an experiment to compare the pure impacts of two coniferous species through roots on the soil CO2 efflux and examine the species' response to experimental warming using infrared heaters. Warming markedly increased exudation rates I (mu g C cm(-1) root length h(-1)) and II (mu g C cm(-2) root area h(-1)) in the two species plots; however, the Picea asperata species had significantly higher root exudation rates than that of the Abies faxoniana species, regardless of warming treatment. The differences in the root morphological and physiological traits between the two species could be responsible for this variation in exudation and response to experimental warming. The P. asperata plots had significantly higher soil respiration rates (2.36 mu mol m(-2) s(-1) on average) relative to the A. faxoniana plots (2.02 mu mol m(-2) s(-1) on average). Similarly, the temperature sensitivity of SUM decomposition (Q(10)) was 1.19 times higher in the P. asperata plots than the A. faxoniana plots. The magnitude and direction of warming effects on the soil CO2 efflux varied considerably with tree species. The warming marginally increased the mean soil respiration by 5.3% in the P. asperata plots and significantly decreased the mean soil respiration by 10.8% in the A. faxoniana plots over the 4-year period. Our results collectively provide robust evidence that tree species can differ in their effects on shaping Q(10) and controlling the soil CO2 efflux via root exudation, thereby implying altered patterns of soil C cycle between tree species in response to global warming. This calls for incorporating root-derived C inputs in controlling the microbial regulation of SUM decomposition in climate-carbon models to better predict soil C dynamics under global environmental change. (C) 2013 Elsevier B.V. All rights reserved.
学科主题Agriculture/agronomy
URL标识查看原文
WOS关键词TEMPERATURE SENSITIVITY ; SUBSTRATE AVAILABILITY ; MICROBIAL FEEDBACKS ; CARBON TURNOVER ; RESPIRATION ; FOREST ; DECOMPOSITION ; ACCLIMATION ; TRANSFORMATIONS ; FERTILITY
WOS研究方向Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:000324511100028
出版者ELSEVIER SCIENCE BV
源URL[http://210.75.237.14/handle/351003/29916]  
专题生物多样性与生态系统服务领域_生态系统恢复与生物多样性保育四川省重点实验室
生物多样性与生态系统服务领域_中国科学院山地生态恢复与生物资源利用重点实验室
生物多样性与生态系统服务领域_生态研究
通讯作者Liu, Qing
作者单位1.Chinese Acad Sci, Chengdu Inst Biol, Chengdu 610041, Peoples R China;
2.Chinese Acad Sci, Ecol Restorat Biodivers Conservat Key Lab Sichuan, Key Lab Mt Ecol Restorat & Bioresource Utilizat, Chengdu 610041, Peoples R China
推荐引用方式
GB/T 7714		 Yin, Huajun,Xiao, Juan,Li, Yufei,et al. Warming effects on root morphological and physiological traits: The potential consequences on soil C dynamics as altered root exudation[J]. AGRICULTURAL AND FOREST METEOROLOGY,2013,180:287-296.
APA Yin, Huajun.,Xiao, Juan.,Li, Yufei.,Chen, Zhi.,Cheng, Xinying.,...&Liu, Qing.(2013).Warming effects on root morphological and physiological traits: The potential consequences on soil C dynamics as altered root exudation.AGRICULTURAL AND FOREST METEOROLOGY,180,287-296.
MLA Yin, Huajun,et al."Warming effects on root morphological and physiological traits: The potential consequences on soil C dynamics as altered root exudation".AGRICULTURAL AND FOREST METEOROLOGY 180(2013):287-296.

入库方式： OAI收割

来源：成都生物研究所

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