Evapotranspiration and carbon exchange in a citrus orchard using eddy covariance
Evapotranspiration (ET) is an important component of the surface energy and hydrological balance and the main consumptive agriculture water use. Commonly used methodologies to estimate ET require validation with field data to provide accurate results. In addition, the evaluation of the net ecosystem exchange rate (F NEE) has gained interest in recent times. There is still very little information available about carbon fluxes in citrus orchards. In this study, the eddy covariance (EC) technique was used to determine the actual evapotranspiration (ETe-ec) and the F NEE during three irrigated seasons over a flat citrus orchard. Actual seasonal crop coefficients (K c-ec) were derived by ETe-ec/reference ET. Average ETe-ec for the whole experiment was 1.74 mm/day. K c-ec showed great variation throughout the year (from 0.40 to 1.20) which was mainly associated with rainfall events. A pronounced variability within both the same season and between seasons was also observed for F NEE. Based on 2009 data, the only year with a complete database, the citrus orchard acted as a sink for CO2, fixing 3855 kg CO2/ha/year. The results complement previous studies in large lysimeters and provide quantitative information for conducting carbon balance in citrus orchards under Mediterranean conditions.
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Springer Nature
2017-09
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dig-ias-es-10261-1667352018-08-03T09:56:11Z Evapotranspiration and carbon exchange in a citrus orchard using eddy covariance Maestre-Valero, J. F. Testi, Luca Jiménez Bello, Miguel Ángel Castel, Juan Ramón Intrigliolo, Diego S. European Commission Ministerio de Economía y Competitividad (España) Evapotranspiration (ET) is an important component of the surface energy and hydrological balance and the main consumptive agriculture water use. Commonly used methodologies to estimate ET require validation with field data to provide accurate results. In addition, the evaluation of the net ecosystem exchange rate (F NEE) has gained interest in recent times. There is still very little information available about carbon fluxes in citrus orchards. In this study, the eddy covariance (EC) technique was used to determine the actual evapotranspiration (ETe-ec) and the F NEE during three irrigated seasons over a flat citrus orchard. Actual seasonal crop coefficients (K c-ec) were derived by ETe-ec/reference ET. Average ETe-ec for the whole experiment was 1.74 mm/day. K c-ec showed great variation throughout the year (from 0.40 to 1.20) which was mainly associated with rainfall events. A pronounced variability within both the same season and between seasons was also observed for F NEE. Based on 2009 data, the only year with a complete database, the citrus orchard acted as a sink for CO2, fixing 3855 kg CO2/ha/year. The results complement previous studies in large lysimeters and provide quantitative information for conducting carbon balance in citrus orchards under Mediterranean conditions. This research was supported by funds from projects Rideco-Consolider CDS2006-0067 and LIFE14 CCM/GR/000635—LIFE CLIMATREE. The authors would like to thank the EU and MINECO for funding, in the frame of the collaborative international consortium IRIDA financed under the ERA-NET Cofund WaterWorks2014 Call. This ERA-NET is an integral part of the 2015 Joint Activities developed by the Water Challenges for a Changing World Joint Programme Initiative (Water JPI). Peer reviewed 2018-06-20T11:32:32Z 2018-06-20T11:32:32Z 2017-09 artículo http://purl.org/coar/resource_type/c_6501 Irrigation Science 35(5): 397-408 (2017) 0342-7188 http://hdl.handle.net/10261/166735 10.1007/s00271-017-0548-6 1432-1319 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/501100000780 en http://dx.doi.org/10.1007/s00271-017-0548-6 Sí none Springer Nature |
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Evapotranspiration (ET) is an important component of the surface energy and hydrological balance and the main consumptive agriculture water use. Commonly used methodologies to estimate ET require validation with field data to provide accurate results. In addition, the evaluation of the net ecosystem exchange rate (F NEE) has gained interest in recent times. There is still very little information available about carbon fluxes in citrus orchards. In this study, the eddy covariance (EC) technique was used to determine the actual evapotranspiration (ETe-ec) and the F NEE during three irrigated seasons over a flat citrus orchard. Actual seasonal crop coefficients (K c-ec) were derived by ETe-ec/reference ET. Average ETe-ec for the whole experiment was 1.74 mm/day. K c-ec showed great variation throughout the year (from 0.40 to 1.20) which was mainly associated with rainfall events. A pronounced variability within both the same season and between seasons was also observed for F NEE. Based on 2009 data, the only year with a complete database, the citrus orchard acted as a sink for CO2, fixing 3855 kg CO2/ha/year. The results complement previous studies in large lysimeters and provide quantitative information for conducting carbon balance in citrus orchards under Mediterranean conditions. |
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European Commission |
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European Commission Maestre-Valero, J. F. Testi, Luca Jiménez Bello, Miguel Ángel Castel, Juan Ramón Intrigliolo, Diego S. |
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artículo |
author |
Maestre-Valero, J. F. Testi, Luca Jiménez Bello, Miguel Ángel Castel, Juan Ramón Intrigliolo, Diego S. |
spellingShingle |
Maestre-Valero, J. F. Testi, Luca Jiménez Bello, Miguel Ángel Castel, Juan Ramón Intrigliolo, Diego S. Evapotranspiration and carbon exchange in a citrus orchard using eddy covariance |
author_sort |
Maestre-Valero, J. F. |
title |
Evapotranspiration and carbon exchange in a citrus orchard using eddy covariance |
title_short |
Evapotranspiration and carbon exchange in a citrus orchard using eddy covariance |
title_full |
Evapotranspiration and carbon exchange in a citrus orchard using eddy covariance |
title_fullStr |
Evapotranspiration and carbon exchange in a citrus orchard using eddy covariance |
title_full_unstemmed |
Evapotranspiration and carbon exchange in a citrus orchard using eddy covariance |
title_sort |
evapotranspiration and carbon exchange in a citrus orchard using eddy covariance |
publisher |
Springer Nature |
publishDate |
2017-09 |
url |
http://hdl.handle.net/10261/166735 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/501100000780 |
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