Título:	Intensified tropical pasture-based beef cattle production systems and their effects on carcass traits, meat quality and methane emissions from Nellore steers.
Autoria:	SILVA, G. V. da PASQUINI NETO, R. MELO, M. N. V. de ANDRADE, L. B. de FURTADO, A. J. FABRICIO, E. C. BERTOLONI, A. V. LOBO, A. A. G. PERNA JUNIOR, F. MEDEIROS, S. R. de BERNDT, A. NASSU, R. T. PEDROSO, A. de F. OLIVEIRA, P. P. A. PEREIRA, A. S. C. RODRIGUES, P. H. M.
Afiliação:	GABRIELE VOLTARELI DA SILVA, UNIVERSIDADE DE SÃO PAULO; ROLANDO PASQUINI NETO, UNIVERSIDADE DE SÃO PAULO; MARIANA NUNES VIEIRA DE MELO, UNIVERSIDADE DE SÃO PAULO; LUIZA BUDASZ DE ANDRADE, UNIVERSIDADE DE SÃO PAULO; ALTHIERES JOSÉ FURTADO, UNIVERSIDADE DE SÃO PAULO; ESTER COSTA FABRICIO, UNIVERSIDADE DE SÃO PAULO; ANALISA VASQUES BERTOLONI, UNIVERSIDADE DE SÃO PAULO; ANNELISE AILA GOMES LOBO, UNIVERSIDADE DE SÃO PAULO; FLAVIO PERNA JUNIOR, UNIVERSIDADE DE SÃO PAULO; SERGIO RAPOSO DE MEDEIROS, CPPSE; ALEXANDRE BERNDT, CPPSE; RENATA TIEKO NASSU, CPPSE; ANDRE DE FARIA PEDROSO, CPPSE; PATRICIA PERONDI ANCHAO OLIVEIRA, CPPSE; ANGÉLICA SIMONE CRAVO PEREIRA, UNIVERSIDADE DE SÃO PAULO; PAULO HENRIQUE MAZZA RODRIGUES, UNIVERSIDADE DE SÃO PAULO.
Ano de publicação:	2026
Referência:	Livestock Science, v. 307, 105948, 2026.
Conteúdo:	This study evaluated the effects of five pasture-based production systems on the carcass and meat quality traits, as well as the methane (CH4) emissions intensity of male Nellore steers per kg of carcass under tropical conditions. Over two years (2019–2021), uncastrated male steers (three/year/experimental spatial unit) were randomly assigned to five treatments (with two replicates): 1) degraded pasture without nitrogen (N) fertilization (DP0); 2) silvopastoral with 200 kg N ha-1 (SP200); 3) rainfed pasture with 200 kg N ha-1 (RP200); 4) rainfed pasture with 400 kg N ha-1 (RP400); and 5) irrigated pasture with 600 kg N ha-1 (IP600). Animals grazed exclusively, receiving water and mineral-protein supplement ad libitum until being stunned by the Brazilian-approved method cranial concussion, followed by exsanguination, without electrical stimulation. The carcass and meat quality traits observed are positively influenced by intensification. Specifically, IP600, RP400 and RP200 demonstrate a clear benefit in improving RA, BFT, LCCW, CEP and FT (including HEP, FEP and spareribs), and Bones (expressed as kg carcass-1 and %); while SP200 and DP0 restricted the growth rates and muscle development of the animals due to the competition between the trees and the pasture and lack of fertilization, respectively. For CH4 emission intensities (per kg of carcass), SP200 and DP0 exhibited the highest emissions without proportional production gains, while IP600, RP400, and RP200 showed the lowest values. Well-managed intensified pasture-based systems consistently achieved lower CH4 emission per unit of product than those observed in DP0, confirming their potential as a viable sustainability system.
Thesagro:	Gado de Corte Bovino Carne Sistema de Pastejo Carcaça Metano Agricultura Sustentável Crescimento Forragem Cor Touro
NAL Thesaurus:	Beef cattle Meat Grazing Carcass characteristics Methane Sustainable agricultural intensification Forage Color Bulls
Palavras-chave:	Intensificação sustentável
ISSN:	1878-0490
Digital Object Identifier:	https://doi.org/10.1016/j.livsci.2026.105948
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CPPSE)