| Texto completo | |
| Autor(es): Mostrar menos - |
Araujo, Tiago L. R.
;
Rabelo, Carlos H. S.
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Cardoso, Abmael S.
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Carvalho, Victor V.
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Acedo, Tiago S.
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Tamassia, Luis F. M.
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Vasconcelos, Guilherme S. F. M.
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Duval, Stephane M.
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Kindermann, Maik
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Gouvea, Vinicius N.
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Fernandes, Marcia H. M. R.
;
Reis, Ricardo A.
Número total de Autores: 12
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| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF ANIMAL SCIENCE; v. 101, p. 11-pg., 2023-01-03. |
| Resumo | |
Our objective was to evaluate the effects of feeding 3-nitrooxypropanol (3-NOP; Bovaer, DSM Nutritional Products) at two levels on methane emissions, nitrogen balance, and performance by feedlot cattle. In experiment 1, a total of 138 Nellore bulls (initial body weight, 360 +/- 37.3 kg) were housed in pens (27 pens with either 4 or 5 bulls per pen) and fed a high-concentrate diet for 96 d, containing 1) no addition of 3-NOP (control), 2) inclusion of 3-NOP at 100 mg/kg dry matter (DM), and 3) inclusion of 3-NOP at 150 mg/kg DM. No adverse effects of 3-NOP were observed on DM intake (DMI), animal performance, and gain:feed (P > 0.05). In addition, there was no effect (P > 0.05) of 3-NOP on carcass characteristics (subcutaneous fat thickness and rib eye area). In experiment 2, 24 bulls (initial BW, 366 +/- 39.6 kg) housed in 12 pens (2 bulls/pen) from experiment 1 were used for CH4 measurements and nitrogen balance. Irrespective of the level, 3-NOP consistently decreased (P < 0.001) animals' CH4 emissions (g/d; similar to 49.3%), CH4 yield (CH4/DMI; similar to 40.7%) and CH4 intensity (CH4/average daily gain; similar to 38.6%). Moreover, 3-NOP significantly reduced the gross energy intake lost as CH4 by 42.5% (P < 0.001). The N retention: N intake ratio was not affected by 3-NOP (P = 0.19). We conclude that feeding 3-NOP is an effective strategy to reduce methane emissions, with no impairment on feedlot cattle performance. The potential of 3-NOP in reducing daily CH4 emissions per animal daily, per kilogram dry matter intake, and average daily gain has been effective. 3-NOP consistently reduced CH4 emissions similar to 49.3%, methane yield similar to 40.7, and CH4 intensity similar to 38.6%. Lay Summary During fiber digestion in the rumen, enteric methane is produced. Methane is a potent greenhouse gas. Recently several studies have focused on developing synthetic compounds and their utilization as specific inhibitors of methanogenesis. 3-Nitrooxypropanol is a structural compound that can help to mitigate CH4 emissions. The objective of this study was to evaluate the effects of feeding 3-nitrooxypropanol (3-NOP; Bovaer, DSM Nutritional Products) at two levels on methane emissions, nitrogen balance, and performance by feedlot cattle. No effect of 3-NOP on animal performance and N balance was found. However, regarding CH4 production 3-NOP consistently decreased (P < 0.001) animals' CH4 emissions (g/d; similar to 49.3%), methane yield (CH4/dry matter intake; similar to 40.7%), and CH4 intensity (CH4/average daily gain; similar to 38.6%). This study provides information on the potential role of 3-NOP on reducing CH4 emissions from feedlot cattle without reducing animal performance. (AU) | |
| Processo FAPESP: | 17/11274-5 - Decomposição de serrapilheira e emissão de gases de efeito estufa em pastos de Brachiaria adubados com doses crescentes de nitrogênio |
| Beneficiário: | Abmael da Silva Cardoso |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |