Data/hora: 21/06/2024 18:26:36

Biblioteca(s): | Embrapa Pecuária Sul.
Data corrente: | 08/11/2019
Data da última atualização: | 08/11/2019
Autoria: | SOUZA FILHO, W. de; NUNES, P. A. de A.; BARRO, R. S.; KUNRATH, T. R.; ALMEIDA, G. M. de; GENRO, T. C. M.; BAYER, C.; CARVALHO, P. C. de F.
Afiliação: | William de Souza Filho, UFRGS; Pedro Arthur de Albuquerque Nunes, UFRGS; Raquel Santiago Barro, UFRGS; Taíse Robinson Kunrath, UFRGS; Gleice Menezes de Almeida, UFRGS; TERESA CRISTINA MORAES GENRO, CPPSUL; Cimelio Bayer, UFRGS; Paulo Cesar de Faccio Carvalho, UFRGS.
Título: | Mitigation of enteric methane emissions through pasture management in integrated crop-livestock systems: trade-offs between animal performance and environmental impacts.
Ano de publicação: | 2019
Fonte/Imprenta: | Journal of Cleaner Production, v. 213, p. 968-975, Mar. 2019.
Idioma: | Inglês
Conteúdo: | We evaluated the effect of different grazing intensities by steers on animal performance, herbage intake and CH4 emissions in the stocking period of a soybean-beef cattle integrated system in southern Brazil. Treatments consisted of different grazing intensities, defined by target sward heights (10, 20, 30 and 40 cm) of mixed black-oat (Avena strigosa Schreb.) and Italian ryegrass (Lolium multiflorum Lam.) pastures under continuous stocking. Grazing management affected herbage utilization and, consequently, animal performance and CH4 emission. At the individual level, CH4 emission and animal performance had optimal values when pasture height was managed within a range of 23e30 cm. At the farm level, we found a positive linear effect of grazing intensity on animal live weight gain per hectare and the associated environmental costs of land use. Liveweight gain increased by 90 g ha1 day1 and CH4 emissions increased by 500 g CO2eq ha1 day1 for each cm of target sward height reduction. Given that most producers graze pastures to very short heights, large-scale adoption of target heights within 23e30 cm in southern Brazil has the potential to achieve 13e14% of the mitigation target for GHG emissions from the whole agricultural sector and 22e25% of the target for enteric fermentation from the livestock sector pledged by the Brazilian Government in the Paris Agreement. We conclude that adequate grazing management is the key strategy to improve animal production and reduce the environmental impact from livestock in ICLS.
Thesagro: | Bovino; Metano.
Categoria do assunto: | --
Registro original: | Embrapa Pecuária Sul (CPPSUL)
Exemplares: | CPPSUL - (14589-1) - UPC - AP - DD -  -  -  - DIS