Data/hora: 09/06/2024 15:58:34

Biblioteca(s): | Embrapa Pecuária Sudeste.
Data corrente: | 03/05/2012
Data da última atualização: | 22/02/2023
Autoria: | HULSHOF, R. B. A.; BERNDT, A.; GERRITS, W. J. J.; DIJKSTRA, J.; ZIJDERVELD, S. M. van; NEWBOLD, J. R.; PERDOK, H. B.
Afiliação: | R. B. A. HULSHOF, Research Centre De Viersprong; ALEXANDRE BERNDT, CPPSE; W. J. J. GERRITS, Wageningen University; J. DIJKSTRA, Wageningen University; S. M. VAN ZIJDERVELD, Research Centre De Viersprong; J.R. NEWBOLD, Research Centre De Viersprong; H. B. PERDOK, Research Centre De Viersprong.
Título: | Dietary nitrate supplementation reduces methane emission in beef cattle fed sugarcane-based diets.
Ano de publicação: | 2012
Fonte/Imprenta: | Journal of Animal Science, v. 90, n. 7, p. 2317-2323, jul. 2012.
DOI: | 10.2527/jas.2011-4209
Idioma: | Inglês
Conteúdo: | The objective of this study was to determine the effect of dietary nitrate on methane emission and rumen fermentation parameters in Nellore x Guzera (Bos indicus) beef cattle fed a sugarcane based diet. The experiment was conducted with 16 steers weighing 283 ± 49 kg (mean ± SD), six rumen cannulated and ten intact, in a cross-over design. The animals were blocked according to body weight and presence or absence of rumen cannula and randomly allocated to either the nitrate diet (22 g nitrate/ kg DM) or the control diet made isonitrogenous by the addition of urea. The diets consisted of freshly chopped sugarcane and concentrate (60:40 on DM basis), fed as a mixed ration. A 16-d adaptation period was used to allow the rumen microbes to adapt to dietary nitrate. Methane emission was measured using the sulfur hexafluoride tracer technique. Dry matter intake (P = 0.09) tended to be lower when nitrate was present in the diet compared to the control, 6.60 and 7.05 kg DMI, respectively. The daily methane production was reduced (P < 0.01) by 32% when steers were fed the nitrate diet (85 g/d) compared with the urea diet (125 g/d). Methane emission per kg DMI was 27% lower (P < 0.01) on the nitrate diet (13.3 g methane/kg DMI) than on the control diet (18.2 g methane/kg DMI). Methane losses as a fraction of gross energy intake (GEI) were lower (P < 0.01) on the nitrate diet (4.2% of GEI) than on the control diet (5.9% of GEI). Nitrate mitigated enteric methane production by 87% of the theoretical potential. The rumen fluid ammonia-nitrogen (NH3-N) concentration was significantly greater (P < 0.05) for the nitrate diet. The total concentration of VFA was not affected by nitrate in the diet, whilst the proportion of acetic acid tended to be greater (P = 0.09), propionic acid lower (P = 0.06) and acetate/propionate ratio tended to be greater (P = 0.06) for the nitrate diet. Dietary nitrate reduced enteric methane emission in beef cattle fed sugarcane based diet.
Palavras-Chave: | Nitrate; Parameters sugarcane.
Thesagro: | Rúmen.
Thesaurus Nal: | beef cattle; methane; sulfur hexafluoride.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Pecuária Sudeste (CPPSE)
Exemplares: | CPPSE - (21047-1) - UPC - AP - DD - PROCI-2012.00012 - HUL - 2012.00012 - DIS