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Vegetation primary production estimation at maize and alpine meadow over the Heihe River Basin, China

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Wang XF, Ma MG, Huang GH, Veroustraete F, Zhang ZH, Song Y, Tan JL. Vegetation primary production estimation at maize and alpine meadow over the Heihe River Basin, China. International Journal of Applied Earth Observation and Geoinformation, 2012, 17: 94-101, doi:10.1016/j.jag.2011.09.009.

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Type Of Reference JOUR
Title Vegetation primary production estimation at maize and alpine meadow over the Heihe River Basin, China
Authors Wang, Xufeng| Ma, Mingguo| Huang, Guanghui| Veroustraete, Frank| Zhang, Zhihui| Song, Yi| Tan, Junlei|
Secondary Title International Journal of Applied Earth Observation and Geoinformation
Abstract The accurate estimation of Gross Primary Production (GPP) is an important issue in carbon cycle studies. In this study, GPP dynamic of two typical vegetation in Heihe River Basin (alpine meadow in the upper stream and maize in middle stream) were estimated using Eddy Covariance (EC) and Vegetation Photosynthesis Model (VPM). Yearly GPP observed by EC at alpine meadow is 853 gC/m2/yr, which is only half of GPP of the value 1567 gC/m2/yr at maize field. This is mainly attributed to irrigation, fertilization and high light use efficiency at maize field. More than 80% carbon fixed by photosynthesis is release to atmosphere through ecosystem respiration at alpine meadow and at maize field 60%. The maximum light use efficiency of maize is 2.66 gC/MJ ARAR, while it is 1.6 gC/MJ ARAR at alpine meadow. VPM can correctly simulate seasonal dynamic and magnitude of GPP at both of the two sites. GPP values predicted by VPM were 872 gC/m2/yr at alpine meadow site and 1246 gC/m2/yr at maize site. The determination coefficients were as large as 0.9 at the alpine meadow site and 0.93 at the maize site. Average GPP value at each season predicted by VPM is very close to that observed by EC.
Date 2012///
Year 2012
DOI 10.1016/j.jag.2011.09.009
Database Provider ScienceDirect
volume 17
Start Page 94
Alternate Title1 International Journal of Applied Earth Observation and Geoinformation
Issn 0303-2434
Url http://www.sciencedirect.com/science/article/pii/S0303243411001322
Access Date 2013/10/04/06:24:02
Keywords Alpine meadow| Cropland| Gross primary production| Heihe River Basin| light use efficiency| Vegetation Photosynthesis Model|
file_attachments2 http://yadda.icm.edu.pl/yadda/element/bwmeta1.element.elsevier-8f36e18c-4db6-3748-b681-5021c0928e1d| http://www.sciencedirect.com/science/article/pii/S0303243411001322| http://www.sciencedirect.com/science/article/pii/S0303243411001322|
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