Fecha/hora: 01/06/2024 04:39:58

Biblioteca(s): 	INIA Las Brujas.	
Fecha corriente: 	09/04/2021	
Fecha de la última actualización: 	09/04/2021	
Autoria: 	CEZIMBRA, I.M.; DE ALBUQUERQUE NUNES, P.A.; DE SOUZA FILHO, W.; TISCHLER, M.R.; GENRO, T.C.M.; BAYER, C.; SAVIAN, J.V.; BONNET, O.J.F.; SOUSSANA, J.-F.; DE FACCIO CARVALHO, P.C.	
Afiliación: 	IAN MACHADO CEZIMBRA, Department of Forage Plants and Agrometeorology, Federal University of Rio Grande do Sul (UFRGS), RS, Brazil; PEDRO ARTHUR DE ALBUQUERQUE NUNES, Department of Forage Plants and Agrometeorology, Federal University of Rio Grande do Sul (UFRGS), RS, Brazil; WILLIAM DE SOUZA FILHO, Department of Forage Plants and Agrometeorology, Federal University of Rio Grande do Sul (UFRGS), RS, Brazil; MARCELO RITZEL TISCHLER, Department of Forage Plants and Agrometeorology, Federal University of Rio Grande do Sul (UFRGS), RS, Brazil; TERESA CRISTINA MORAES GENRO, Brazilian Agricultural Research Corporation (Embrapa - CPPSUL), Bagé, Brazil; CIMÉLIO BAYER, Department of Soil Science, Federal University of Rio Grande do Sul, RS, Brazil; JEAN VICTOR SAVIAN, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; OLIVIER JEAN FRANÇOIS BONNET, Department of Forage Plants and Agrometeorology, Federal University of Rio Grande do Sul (UFRGS), RS Brazil; JEAN-FRANÇOIS SOUSSANA, Unité Mixte de Recherche sur l'Écosystème Prairial (UREP), Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement (INRAE), Clermont-Ferrand, France; PAULO CÉSAR DE FACCIO CARVALHO, Department of Forage Plants and Agrometeorology, Federal University of Rio Grande do Sul (UFRGS), RS, Brazil.	
Título: 	Potential of grazing management to improve beef cattle production and mitigate methane emissions in native grasslands of the Pampa biome.	
Año de publicación: 	2021	
Fuente/Imprenta: 	Science of the Total Environment, 2021, Volume 780, Article number 146582. Doi: https://doi.org/https://doi.org/10.1016/j.scitotenv.2021.146582	
ISSN: 	0048-9697	
DOI: 	10.1016/j.scitotenv.2021.146582	
Idioma: 	Inglés	
Notas: 	Article history: Received 19 August 2020; Received in revised form 15 March 2021; Accepted 15 March 2021; Available online 19 March 2021.
Editor: Elena Paoletti.	
Contenido: 	ABSTRACT.
We tested the hypothesis that improving sward structure through adjustments in forage allowance results in greater forage intake and live weight (LW) gains by beef cattle and lower CH4 emissions per unit LW gain and unit area in a native grassland ecosystem of the Pampa biome. The experiment was carried out during 2012 and 2013 in southern Brazil. The experimental design was a randomized complete block with two replicates. Treatments consisted of five contrasting forage allowances of a native grassland managed under continuous stocking: 4, 8, 8?12, 12, and 16 kg of dry matter (DM) 100 kg LW&#8722;1 day&#8722;1 (or % LW). The 8?12% LW treatment had a variable forage allowance of 8% LW in spring and 12% LW in summer, autumn, and winter. Forage allowance was controlled by changes in stocking rate (kg LW ha&#8722;1). Average daily gain (kg LW day&#8722;1) was high for forage allowances of 12 and 16% LW but decreased at 8%, reaching the lowest value at 4% LW treatment (p < 0.001). Live weight gain ha&#8722;1 year&#8722;1 was the greatest at forage allowance of 8?12% LW (p < 0.001). Forage DM intake peaked at a forage allowance of 12% LW (p = 0.005). Individual CH4 emissions remained constant around 150 g day&#8722;1 for the two highest forage allowances and decreased to 118 and 107 g day&#8722;1 under forage allowances of 8 and 4% LW, respectively (p = 0.002). Emissions per unit LW gain and unit area were driven by animal productivity changes and decreased with increasing forage allowance (p = 0.001 and p = 0.040, respectively). We propose that the combination of 8% LW forage allowance during spring and 12% LW during the rest of the year should be targeted to best balance animal production and environmental impact in the Pampa biome. 
© 2021 Elsevier B.V.	
Palabras-Clave: 	Climate change; Grazing intensity; Greenhouse gases; Livestock.	
Categoría del tema: 	F01 Cultivo	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (102634-1) - PXI - AP - DD - PP/Science of f Total Environment/2021 -  -  - DIS