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Effects of experimental warming on soil N transformations of two coniferous species,Eastern Tibetan Plateau,China

文献类型：期刊论文

作者Yin, Huajun1,2; Chen, Zhi1,2; Liu, Qing1,2
刊名SOIL BIOLOGY & BIOCHEMISTRY
出版日期2012-07
卷号50页码:77-84
关键词Picea asperata Abies faxoniana N transformation Warming Subalpine coniferous forest
ISSN号0038-0717
DOI10.1016/j.soilbio.2012.03.004
产权排序1
文献子类Article
英文摘要Previous research on the effects of tree species on soil processes has focused primarily on the role of leaf litter inputs and relatively few studies have considered the importance of plant roots and their associated ecological processes, especially under climate change. We therefore conducted an experiment to compare the impacts of two coniferous species via roots on soil N transformations and their responses to experimental warming using infrared heaters in the Eastern Tibetan Plateau. The infrared heater on average enhanced both air temperature and soil temperature by 2.0 degrees C and 3.7 degrees C, respectively. Warming did not affect soil organic C (SOC), total N (TN), microbial biomass C (MBC) and N (MBN), or their ratios (MBC/MBN) in both coniferous species plots. Effects of experimental warming on soil N availability varied with tree species and sampling dates. There were higher NO3- and lower NH4- concentrations in the Picea asperata than in the Abies faxoniana plots irrespective of warming treatment or sampling date, possibly caused by higher gross nitrification and denitrification rates in the P. asperata. Experimental warming significantly increased the net mineralization, net nitrification and denitrification rates on most sampling times in both species plots. Responses of gross nitrification to experimental warming significantly differed between the two species, and depended strongly on seasons. Gross nitrification and denitrification rates were markedly greater in the P. asperata than in the A. faxoniana plots, with P. asperata being more sensitive than A. faxoniana in response to experimental warming. Differences in the root morphology (i.e., root length, root type) and activity (i.e., root exudation, fine root vigor) between the two species could be largely responsible for the variation in the soil N cycling and its response to experimental warming. Taken together, our results indicate that tree species can differ in their effects on soil transformations and nutrient availability via roots and associated microbial processes. Further research is required regarding the exact mechanisms of tree species effects via roots on soil processes and function under climate change. (C) 2012 Elsevier Ltd. All rights reserved.
学科主题Environment/ecology
URL标识查看原文
WOS关键词PLANT-GROWTH ; TEMPERATURE SENSITIVITY ; NITROGEN MINERALIZATION ; MICROBIAL BIOMASS ; ROOT EXUDATION ; ORGANIC-CARBON ; RHIZOSPHERE ; FOREST ; ECOSYSTEM ; INCREASES
WOS研究方向Agriculture
语种英语
WOS记录号WOS:000305104400010
出版者PERGAMON-ELSEVIER SCIENCE LTD
源URL[http://210.75.237.14/handle/351003/29922]  
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, Key Lab Mt Ecol Restorat & Bioresource Utilizat, Ecol Restorat Biodivers Conservat Key Lab Sichuan, Chengdu 610041, Peoples R China
推荐引用方式
GB/T 7714		 Yin, Huajun,Chen, Zhi,Liu, Qing. Effects of experimental warming on soil N transformations of two coniferous species,Eastern Tibetan Plateau,China[J]. SOIL BIOLOGY & BIOCHEMISTRY,2012,50:77-84.
APA Yin, Huajun,Chen, Zhi,&Liu, Qing.(2012).Effects of experimental warming on soil N transformations of two coniferous species,Eastern Tibetan Plateau,China.SOIL BIOLOGY & BIOCHEMISTRY,50,77-84.
MLA Yin, Huajun,et al."Effects of experimental warming on soil N transformations of two coniferous species,Eastern Tibetan Plateau,China".SOIL BIOLOGY & BIOCHEMISTRY 50(2012):77-84.

入库方式： OAI收割

来源：成都生物研究所

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