Chi, Jinshu
- Washington State University
Abstract
Analysis of carbon and water budgets in cropping systems is important for understanding the impacts of different management practices and meteorological conditions, in the context of climate change, on agriculture. We have established a pair of long-term eddy covariance flux towers at the R. J. Cook Agronomy Farm (CAF) near Pullman, Washington, US. The tower sites have similar crop rotation, weather conditions, and management practices except tillage. One site has been under no-till management (CAF-NT) since 1998, while the other site has used conventional tillage practice (CAF-CT) over the same time period. Measurements conducted above a garbanzo bean crop (Cicer arietinum) between October 2012 and September 2013 showed the CAF-NT site was close to CO2 neutral with an annual cumulative net ecosystem exchange of CO2 (NEE) of -20 +/- 38 g Cm-2. By contrast, the CAF-CT site was a CO2 source with an annual NEE of 117 +/- 39 g Cm-2 during the same time period. The annual NEE values at each site were significantly different (p
Keywords
Eddy covariance; Cropland; Tillage practices; Net ecosystem exchange (NEE); Evapotranspiration (ET); Carbon and water budgets
Published in
Agricultural and Forest Meteorology
2016, volume: 218, pages: 37-49
Publisher: ELSEVIER SCIENCE BV
SLU Authors
UKÄ Subject classification
Meteorology and Atmospheric Sciences
Publication identifier
- DOI: https://doi.org/10.1016/j.agrformet.2015.11.019
Permanent link to this page (URI)
https://res.slu.se/id/publ/89318