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Potential of grazing management to improve beef cattle production and mitigate methane emissions in native grasslands of the Pampa biome.
Cezimbra, Ian Machado; de Albuquerque Nunes, Pedro Arthur; de Souza Filho, William; Tischler, Marcelo Ritzel; Genro, Teresa Cristina Moraes; Bayer, Cimélio; Savian, Jean Víctor; Bonnet, Olivier Jean François; Soussana, Jean-François; de Faccio Carvalho, Paulo César.
Afiliação
  • Cezimbra IM; Department of Forage Plants and Agrometeorology, Federal University of Rio Grande do Sul (UFRGS), 7712 Bento Gonçalves Ave., Porto Alegre, RS 91540-000, Brazil.
  • de Albuquerque Nunes PA; Department of Forage Plants and Agrometeorology, Federal University of Rio Grande do Sul (UFRGS), 7712 Bento Gonçalves Ave., Porto Alegre, RS 91540-000, Brazil.
  • de Souza Filho W; Department of Forage Plants and Agrometeorology, Federal University of Rio Grande do Sul (UFRGS), 7712 Bento Gonçalves Ave., Porto Alegre, RS 91540-000, Brazil.
  • Tischler MR; Department of Forage Plants and Agrometeorology, Federal University of Rio Grande do Sul (UFRGS), 7712 Bento Gonçalves Ave., Porto Alegre, RS 91540-000, Brazil.
  • Genro TCM; Brazilian Agricultural Research Corporation (Embrapa - CPPSUL), BR-153, Bagé, Brazil.
  • Bayer C; Department of Soil Science, Federal University of Rio Grande do Sul, 7712 Bento Gonçalves Ave., Porto Alegre, RS 91540-000, Brazil.
  • Savian JV; Instituto Nacional de Investigación Agropecuaria (INIA), Programa Pasturas y Forrajes, Estación Experimental INIA Treinta y Tres, Ruta 8, Km 281, Treinta y Tres, Uruguay.
  • Bonnet OJF; Department of Forage Plants and Agrometeorology, Federal University of Rio Grande do Sul (UFRGS), 7712 Bento Gonçalves Ave., Porto Alegre, RS 91540-000, Brazil.
  • Soussana JF; 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.
  • de Faccio Carvalho PC; Department of Forage Plants and Agrometeorology, Federal University of Rio Grande do Sul (UFRGS), 7712 Bento Gonçalves Ave., Porto Alegre, RS 91540-000, Brazil. Electronic address: paulocfc@ufrgs.br.
Sci Total Environ ; 780: 146582, 2021 Aug 01.
Article em En | MEDLINE | ID: mdl-34030331
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-1 day-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-1). Average daily gain (kg LW day-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-1 year-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-1 for the two highest forage allowances and decreased to 118 and 107 g day-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.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ração Animal / Metano Limite: Animals País/Região como assunto: America do sul / Brasil Idioma: En Revista: Sci Total Environ Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Brasil País de publicação: Holanda
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ração Animal / Metano Limite: Animals País/Região como assunto: America do sul / Brasil Idioma: En Revista: Sci Total Environ Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Brasil País de publicação: Holanda