Download Fecha/hora: 24/03/2017 17:08:38 Biblioteca(s): INIA La Estanzuela

Fecha/hora: 08/06/2017 23:16:31
Biblioteca(s): INIA La Estanzuela.
Fecha corriente: 12/10/2015
Fecha de la última actualización: 02/06/2017
Autoria: CAPURRO, M.C.; RICCETTO, S.; TARLERA, S.; IRISARRI, P.; FERNÁNDEZ, A.;
CANTOU, G.; ROEL, A.
Afiliación: MARIA CRISTINA CAPURRO BAZZANO, INIA (Instituto Nacional de Investigación
Agropecuaria), Uruguay; SARA MAGDALENA RICCETTO AGUIRREZABALA,
INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; MARIA
GUILLERMINA CANTOU MAYOL, INIA (Instituto Nacional de Investigación
Agropecuaria), Uruguay; ALVARO ROEL DELLAZOPPA, INIA (Instituto Nacional de
Investigación Agropecuaria), Uruguay.
Título: Irrigation management and greenhouse gas emissions in Uruguayan rice production
systems: abstract.
Año de publicación: 2015
Fuente/Imprenta: Agrociencia Uruguay, v. 19, special issue "Inter-Regional CIGR Conference on Land and
Water Challenges, 3., La Estanzuela, Colonia, UY. Tools for developing; "Dr. Mario
García Petillo"", p. 60, 2015.
Idioma: Inglés
Notas: En versión electrónica difiere la paginación: Agrociencia Uruguay, v. 19, special issue, p.
64, 2015.
Contenido: Environmental impact and sustainability of agricultural systems and management
practices leading to climate change mitigation
are one of the most relevant issues to agricultural production nowadays. Mitigation is the
process of reducing emissions or
enhancing sinks of greenhouse gases (GHG), to limit global warming potential and
restrict future climate change. The most
relevant GHG are Carbon dioxide (CO2), Methane (CH4) and Nitrous Oxide (N2O). The
steady increase of its concentrations
in the atmosphere over several decades has led to enhance global warming. CH4 and N2O
are the most relevant GHG emitted
mainly in the agricultural sector. It is well known that water management has great impact
on GHG emissions from rice paddy
fields. One of the most important tools for rice crop production and mitigation of CH4
emission is the controlled irrigation.
However, it could result in a N2O emission increase and reduced rice yields. For these
reasons, it is remarkably important to
assess the tradeoff relationship between both GHG and the effect on rice productivity. A 3
year field experiment with two different
irrigation systems was set at southeast of Uruguay. Conventional water management
(continuous flooding after 30 days of
emergence, CF30) and an alternative irrigation system (controlled deficit irrigation
allowing wetting and drying, AWDI) were
compared. The objective was to study the effect of water management on GHG emission,
water productivity and rice yields in
order to identify strategies for further progress in sustainable intensification of Uruguayan
rice. Results showed that mean
cumulative CH4 emission values for AWDI were 55% lower than CF30 systems; on the
other hand, there were no significant
differences in N2O emission among systems. Significant yield differences were not
observed in two of the rice seasons, while
AWDI recorded a significant yield reduction in one of them. Total irrigation water
applied and irrigation water productivity did not
showed differences in two of the rice seasons, while CF30 reported a higher amount of
water applied and lower water
productivity in one of the seasons. It can be concluded that AWDI could be an option to
enhance water productivity and GHG
emission mitigation. However, grain yield can be compromised in AWDI systems. The
adoption of these technology is based
on the indispensable assess of an overall tradeoff between the risk of possible yield losses,
total water used and GHG
emissions.
Palabras-Clave: EMISIONES DE GASES DE EFECTO INVERNADERO; ÓXIDO NITROSO.
Thesagro: ARROZ; MANEJO DEL AGUA; METANO; RIEGO; URUGUAY.
Categoría del tema: F06 Riego
URL: http://www.ainfo.inia.uy/digital/bitstream/item/5056/1/Agrociencia-Congreso-CIGR2015
-v.19.si.p.64-CAPURRO.pdf
Registro original: INIA La Estanzuela (LE)
Ejemplares: LE - (101172-1) - PXI - PC - PP - LE-PP/AGROCIENCIA URUGUAY/ - 2015/19/si - . .
. . - DIS
LE - (101172-2) - PXI - PC - DD - - - - DIS