Establishment of apparent quantum yield and maximum ecosystem assimilation on Tibetan Plateau alpine meadow ecosystem

CORC > 地理科学与资源研究所 > 中国科学院地理科学与资源研究所 > 生态系统研究网络观测与模拟重点实验室 > CERN水分分中心

	Establishment of apparent quantum yield and maximum ecosystem assimilation on Tibetan Plateau alpine meadow ecosystem
	Yu, GR(于贵瑞)
刊名	SCIENCE IN CHINA SERIES D-EARTH SCIENCES
	2005
卷号	48 期号:Suppl. 1 页码:141-147
关键词	Tibetan Plateau alpine meadow ecosystem eddy covariance apparent quantum yield maximum ecosystem assimilation
ISSN号	1006-9313
通讯作者	Xu LL
学科主题	Geosciences ; Multidisciplinary
收录类别	SCI
公开日期	2011-06-10
附注	The alpine meadow is widely distributed on the Tibetan Plateau with an area of about 1.2X 10(6) km(2). Damxung County, located in the hinterland of the Tibetan Plateau, is the place covered with this typical vegetation. An open-path eddy covariance system was set up in Damxung rangeland station to measure the carbon flux of alpine meadow from July to October, 2003. The continuous carbon flux data were used to analyze the relationship between net ecosystem carbon dioxide exchange (NEE) and photosynthetically active radiation (PAR), as well as the seasonal patterns of apparent quantum yield (a) and maximum ecosystem assimilation (P-max). Results showed that the daytime NEE fitted fairly well with the PAR in a rectangular hyperbola function, with a declining in the order of peak growth period (0.0244 mu molCO(2) . mu mol(-1) PAR) > early growth period > seed maturing period > withering period (0.0098 mu molCO(2) . mu mol(-1) PAR). The Pmx did not change greatly during the first three periods, with an average of 0.433 MgCO2 . m(-2) . s(-1), i.e. 9.829 mu molCO(2) . m(-2) . s(-1). However, during the withering period, Fmax was only 0.35 MgCO2 . m(-2) . s(-1), i.e. 7.945 mu molCO(2) . m(-2) . s(-1). Compared with other grassland ecosystems, the a of the Tibetan Plateau alpine meadow ecosystem was much lower.
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/4305]
专题	地理科学与资源研究所_生态系统研究网络观测与模拟重点实验室_CERN水分分中心
推荐引用方式 GB/T 7714	Yu, GR. Establishment of apparent quantum yield and maximum ecosystem assimilation on Tibetan Plateau alpine meadow ecosystem[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2005,48(Suppl. 1):141-147.
APA	Yu, GR.(2005).Establishment of apparent quantum yield and maximum ecosystem assimilation on Tibetan Plateau alpine meadow ecosystem.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,48(Suppl. 1),141-147.
MLA	Yu, GR."Establishment of apparent quantum yield and maximum ecosystem assimilation on Tibetan Plateau alpine meadow ecosystem".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 48.Suppl. 1(2005):141-147.