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

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

Soil, Water, and Climate

Research output: Contribution to conference › Paper › peer-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 δ¹³C_b.

Original language	English (US)
Pages	377-378
Number of pages	2
State	Published - Dec 1 2004
Event	26th Conference on Agricultural and Forest Meteorology - Vancouver, BC, Canada Duration: Aug 23 2004 → Aug 26 2004

Other

Other	26th Conference on Agricultural and Forest Meteorology
Country/Territory	Canada
City	Vancouver, BC
Period	8/23/04 → 8/26/04

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Using continuous stable isotope measurements to partition net ecosystem CO₂ exchange into photosynthesis and respiration of a corn-soybean rotation ecosystem. / Zhang, Jianmin; Griffis, Timothy J.; Baker, John M.
2004. 377-378 Paper presented at 26th Conference on Agricultural and Forest Meteorology, Vancouver, BC, Canada.

Research output: Contribution to conference › Paper › peer-review

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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.",

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year = "2004",

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AU - Griffis, Timothy J.

AU - Baker, John M.

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Y1 - 2004/12/1

N2 - 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.

AB - 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.

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ER -

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

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