Fecha/hora: 16/06/2024 04:17:35

Biblioteca(s): 	INIA Treinta y Tres.	
Fecha corriente: 	24/02/2021	
Fecha de la última actualización: 	24/02/2021	
Autoria: 	TSENG, M.C.; ROEL, A.; MACEDO, I.; MARELLA, M.; TERRA, J.A.; ZORRILLA DE SAN MARTÍN, G.; PITTELKOW, C. M.	
Afiliación: 	MENG-CHUN TSENG, University of Illinois-Urbana-Champaign. Department of Crop Sciences. USA.; ALVARO ROEL DELLAZOPPA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; IGNACIO MACEDO YAPOR, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; MUZIO MARELLA, SAMAN (Sociedad Anónima Molinos Arroceros Nacionales), Uruguay.; JOSÉ ALFREDO TERRA FERNÁNDEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; GONZALO ROBERTO ZORRILLA DE SAN MARTÍN PEREYRA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; CAMERON M. PITTELKOW, University of Illinois-Urbana-Champaign. Department of Crop Sciences. USA / UC Davis. Department of Plant Sciences. USA.	
Título: 	Field-level factors for closing yield gaps in high-yielding rice systems of Uruguay.	
Año de publicación: 	2021	
Fuente/Imprenta: 	Field Crops Research, February 2021, vol. 264, no. 108097. Doi: https://doi.org/10.1016/j.fcr.2021.108097	
Páginas: 	12 p.	
DOI: 	10.1016/j.fcr.2021.108097	
Idioma: 	Inglés	
Notas: 	Article history: Received 9 April 2020 / Received in revised form 12 January 2021 / Accepted 5 February 2021 / Available online 24 February 2021.	
Contenido: 	Abstract:
Yield gap assessments at the field-level are key for developing management practices to increase crop production in a sustainable manner. Although rice is an important food crop worldwide, yield gaps remain less investigated in Latin American rice systems. In this study, we evaluated field-level factors for closing yield gaps (based on
attainable farm yield, defined as the mean of top 10 % of farmers) for rice production in Uruguay using crop management and yield records from 2012 to 2017, covering approximately 70,000 ha per year (40 % of total rice area). The mean annual attainable yield gap ranged from 16 % to 22 % in fields with non-hybrid cultivars (90 %
of planted area) and from 14 % to 22 % in fields with hybrid rice (10 % of planted area). Early seeding was identified as the most influential factor for reducing yield gaps in both systems, followed by N rate. Stand establishment was also important for closing yield gap in non-hybrid fields, while rotation with improved pasture was important in hybrid fields. When variables were categorized as input-related, manageable, or nonmanageable, on average manageable factors (e.g. early planting and stand stablishment) were more important than input-related factors (e.g. seed or fertilizer rate). This study highlights a simple, self-contained method using large field-level datasets to quantify yield gaps and develop strategies for improving agricultural productivity.	
Palabras-Clave: 	CROP MANAGEMENT; RICE; SISTEMA ARROZ-PASTURAS; SOUTH AMERICA; YIELD GAP.	
Categoría del tema: 	F01 Cultivo	
Registro original: 	INIA Treinta y Tres (TT)	
Ejemplares: 	TT - (103242-1) - PXI - AP - DD - PP/Field-Crops-Research/2021/Roel -  -  - DIS