Using continuous stable isotope measurements to partition net ecosystem CO2 exchange into photosynthesis and respiration of a corn-soybean rotation ecosystem

Jianmin Zhang, Timothy J. Griffis, John M. Baker

Research output: Contribution to conferencePaperpeer-review

Abstract

The isotopic measurements combined with the micrometeorologiocal observations were used to partition the net ecosystem CO2 exchange (NEE) of a C3-C4 rotation agricultural ecosystem into photosynthesis and respiration. The isotopic method provides real-time partitioning of NEE, and should lead to better understanding of the short-term ecophysiological processes than the regression method. The results showed that the partitioned photosynthesis and respiration were in accordance with the temperature regression method in magnitude during the full canopy stage. The partitioning was most sensitive to δ13Cb.

Original languageEnglish (US)
Pages377-378
Number of pages2
StatePublished - Dec 1 2004
Event26th Conference on Agricultural and Forest Meteorology - Vancouver, BC, Canada
Duration: Aug 23 2004Aug 26 2004

Other

Other26th Conference on Agricultural and Forest Meteorology
CountryCanada
CityVancouver, BC
Period8/23/048/26/04

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