Fecha/hora: 03/06/2024 21:35:43

Biblioteca(s): 	INIA Tacuarembó; INIA Treinta y Tres.	
Fecha corriente: 	10/06/2019	
Fecha de la última actualización: 	06/07/2020	
Autoria: 	CARRACELAS, G.; HORNBUCKLE, J.; ROSAS, J.E.; ROEL, A.	
Afiliación: 	JULIO GONZALO CARRACELAS GARRIDO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. Deakin University, Faculty of Science Engineering & Built Environment, Centre for Regional and Rural Futures, Griffith, New South Wales, Australia.; J. HORNBUCKLE, Deakin University, Faculty of Science Engineering & Built Environment, Centre for Regional and Rural Futures, Griffith, New South Wales, Australia.; JUAN EDUARDO ROSAS CAISSIOLS, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; ALVARO ROEL DELLAZOPPA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.	
Título: 	Irrigation management strategies to increase water productivity in Oryza sativa (rice) in Uruguay.	
Año de publicación: 	2019	
Fuente/Imprenta: 	Agricultural Water Management, Volume 222, 1 August 2019, Pages 161-172. DOI:  https://doi.org/10.1016/j.agwat.2019.05.049	
DOI: 	10.1016/j.agwat.2019.05.049	
Idioma: 	Inglés	
Notas: 	Article history: Received 29 March 2019; Received in revised form 29 May 2019; Accepted 30 May 2019.	
Contenido: 	Traditional rice irrigation systems in Uruguay are fully irrigated and early continuously flooded irrigation accounts for a high volume of water used. The purpose of this study was to determine irrigation techniques that increase irrigation water productivity (WPi) allowing a reduction in water input without negatively affecting grain yield in Uruguay. Ten experiments were conducted over a six-year period from 2009 to 2015, in three experimental units located among the major rice growing regions. Treatments included: early continuous flooding (C), alternate wetting and drying (AWD), intermittent flooding until panicle initiation (IP) and intermittent flooding during all crop growth period (I). All treatments were planted on dry soil. In treatment C flooding started 15?20 days after emergence and a water layer of 10 cm above the soil surface was maintained throughout all the crop cycle. In treatments IP and I, the water level alternated between 10 cm and 0 cm and was re-established when the soil was still saturated. The AWD treatment allowed the soil to dry periodically (water
depletion of 50% of soil available water) until panicle initiation. IP and I over three seasons led to significant savings in irrigation water inputs in the North and Central regions (averaged 35% or - 3986 m3 ha&#8722;1) in relation to C. In the East region, AWD allowed for a 29%(-2067m3 ha&#8722;1) water saving in relation to the control over four seasons but determined a significant yield loss of 1339 kg rice ha&#8722;1 (15% reduction) in relation to C. WPi was increased by 0.25 kg m&#8722;3 (23%) in IP and 0.68 kg m&#8722;3 (62%) in I, in relation to the control C. Whole grain percentage was significantly reduced with I in the North region only. Techniques that maintained the soil water at saturated conditions like intermittent flooding, allowed a reduction of water input with no significant effects
on grain yield, which led to a significant increase in WPi.	
Palabras-Clave: 	ALTERNATE WETTING AND DRYING; INTERMITTENT; QUALITY; RICE (ORYZA SATIVA L.); WATER PRODUCTIVITY; YIELD.	
Thesagro: 	ARROZ.	
Categoría del tema: 	F01 Cultivo	
Registro original: 	INIA Tacuarembó (TBO)	
Ejemplares: 	TBO - (102957-1) - PXI - AP - DD -  -  -  - DIS
TT - (102941-1) - PXI - AP - DD - PP/AWM/2019/Carracelas -  -  - DIS