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Biblioteca(s): | INIA Treinta y Tres.
Fecha corriente: | 01/02/2016
Fecha de la última actualización: | 11/10/2019
Autoria: | TARLERA, S.; CAPURRO, M.C.; IRISARRI, P.; FERNÁNDEZ SCAVINO, A.; CANTOU, G.; ROEL, A.
Afiliación: | SILVANA TARLERA, FACULTAD DE QUÍMICA, UDELAR, UY.; MARIA CRISTINA CAPURRO BAZZANO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; PILAR IRISARRI, FACULTAD DE AGRONOMÍA, UDELAR, UY.; ANA FERNÀNDEZ SCAVINO, FACULTAD DE QUÍMICA, UDELAR, UY.; MARIA GUILLERMINA CANTOU MAYOL, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; ALVARO ROEL DELLAZOPPA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.
Título: | Yield-scaled global potential of two irrigation management systems in a highly productive rice systems.
Año de publicación: | 2016
Fuente/Imprenta: | Scientia Agricola, 2016, v. 73, no. 1 p. 43-50.
ISSN: | 1678-992X
DOI: | 10.1590/0103-9016-2015-0050
Idioma: | Inglés
Notas: | Article history: Received February 06, 2015; accepted June 05, 2015; published 2016.

Contenido:

Abstract:
Water management impacts both methane (CH4) and nitrous oxide (N2O) emissions from rice paddy fields. Although controlled irrigation is one of the most important tools for reducing CH4emission in rice production systems it can also increase N2O emissions and reduce crop yields. Over three years, CH4 and N2O emissions were measured in a rice field in Uruguay under two different irrigation management systems, using static closed chambers: conventional water management (continuous flooding after 30 days of emergence, CF30); and an alternative system (controlled deficit irrigation allowing for wetting and drying, AWDI). AWDI showed mean cumulative CH4 emission values of 98.4 kg CH4 ha&#8722;1, 55 % lower compared to CF30, while no differences in nitrous oxide emissions were observed between treatments ( p > 0.05). No yield differences between irrigation systems were observed in two of the rice seasons ( p > 0.05) while AWDI promoted yield reduction in one of the seasons ( p< 0.05). When rice yield and greenhouse gases (GHG) emissions were considered together, the AWDI irrigation system allowed for lower yield-scaled total global warming potential (GWP). Higher irrigation water productivity was achieved under AWDI in two of the three rice seasons. These findings suggest that AWDI could be an option for reducing GHG emissions and increasing irrigation water productivity. However, AWDI may compromise grain yield in certain years, reflecting the importance of the need for fine tuning of this irrigation strategy and an assessment of the overall tradeoff between relationships in order to promote its adoption by farmers.

Palabras-Clave: | EMISIONES DE METANO; EMISIONES DE ÓXIDO NITROSO; EMISSIONS; GREENHOUSE GASES; METHANE; MITIGATION; NITROUS OXIDE.
Thesagro: | ARROZ; GASES DE EFECTO INVERNADERO; MANEJO DEL AGUA; RIEGO.
Categoría del tema: | P01 Conservación de la naturaleza y recursos de La tierra
URL: | http://www.ainfo.inia.uy/digital/bitstream/item/5473/1/Capurro-arb-2016-1.pdf
Registro original: | INIA Treinta y Tres (TT)
Ejemplares: | TT - (101128-1) - PXI - AP - DD - PP/SCIENTIA-AGRICOLA/2016/7371 -  -  - DIS