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	Effects of elevated UV-B radiation on ecosystem and soil respiration in a winter wheat farmland
	Chen, Shutao1; Hu, Zhenghua1; Li, Hanmao2; Ji, Yuhong2; Yang, Yanping2
刊名	EUROPEAN JOURNAL OF SOIL BIOLOGY
	2011
卷号	47期号:1页码:16-23
关键词	UV-B Winter wheat Ecosystem respiration Soil respiration Temperature sensitivity
ISSN号	1164-5563
DOI	10.1016/j.ejsobi.2010.11.003
通讯作者	Chen, Shutao(Chenstyf@yahoo.com.cn)
英文摘要	O-3 concentration in the stratosphere is decreasing, resulting in higher solar ultraviolet-B radiation (UV-B, 280-320 nm) to the Earth's surface. Enhanced levels of UV-B radiation may, in turn, alter ecosystem processes such as respiration. In this study, daily changes of ecosystem and soil respiration rates under modulated 20% supplementation of UV-B and ambient UV-B conditions (CK) were investigated in the 2007-08 winter wheat (Triticum aestivum L) season in a farmland nearing Nanjing city, south-east China, in order to determine the effects of elevated UV-B radiation on these processes. A paired t-test indicated that the effects of elevated UV-B radiation on ecosystem respiration varied across different measuring periods. Significantly lower ecosystem respiration rates in the elevated UV-B plots were found at the later growth (anthesis and beginning grain filling) stages. Elevated UV-B radiation significantly reduced soil respiration rates during each development stages. As far as the whole measuring period is concerned, elevated UV-B radiation significantly (p < 0.05) reduced both ecosystem respiration and soil respiration. The seasonal mean ecosystem respiration rates for the CK and UV-B treatments were 11443 and 1008.3 mg CO2 m(-2) h(-1), respectively, and the seasonal mean soil respiration rates for the two treatments were 286.0 and 249.3 mg CO2 m(-2) h(-1), respectively. Regression analysis showed that elevated UV-B radiation significantly reduced temperature sensitivity of ecosystem respiration, with the Q(10) decreasing from 1.73 in the CK plots to 1.63 in the elevated UV-B plots. The Q(10) of soil respiration was not significantly affected by enhanced UV-B radiation. The exponential response curve (ecosystem respiration VS temperature) might be constructed with less-damaged plants at the lower temperature and more-damaged plants at the higher temperature, which yielded a lower temperature sensitivity of ecosystem respiration in the UV-B treatment. (C) 2010 Elsevier Masson SAS. All rights reserved.
收录类别	SCI
WOS关键词	STRATOSPHERIC OZONE DEPLETION ; ULTRAVIOLET-RADIATION ; MICROBIAL COMMUNITIES ; PEATLAND MICROCOSMS ; CARBON-DIOXIDE ; EARTHS SURFACE ; RESPONSES ; GROWTH ; FIELD ; PARAMETERS
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
WOS类目	Ecology ; Soil Science
语种	英语
出版者	ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
WOS记录号	WOS:000286917200003
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558897
专题	南京土壤研究所
通讯作者	Chen, Shutao
作者单位	1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China 2.Nanjing Univ Informat Sci & Technol, Sch Environm Sci & Engn, Nanjing 210044, Peoples R China
推荐引用方式 GB/T 7714	Chen, Shutao,Hu, Zhenghua,Li, Hanmao,et al. Effects of elevated UV-B radiation on ecosystem and soil respiration in a winter wheat farmland[J]. EUROPEAN JOURNAL OF SOIL BIOLOGY,2011,47(1):16-23.
APA	Chen, Shutao,Hu, Zhenghua,Li, Hanmao,Ji, Yuhong,&Yang, Yanping.(2011).Effects of elevated UV-B radiation on ecosystem and soil respiration in a winter wheat farmland.EUROPEAN JOURNAL OF SOIL BIOLOGY,47(1),16-23.
MLA	Chen, Shutao,et al."Effects of elevated UV-B radiation on ecosystem and soil respiration in a winter wheat farmland".EUROPEAN JOURNAL OF SOIL BIOLOGY 47.1(2011):16-23.

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