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https://locus.ufv.br//handle/123456789/19758
Tipo: | Artigo |
Título: | Performance, endocrine, metabolic, and reproductive responses of Nellore heifers submitted to different supplementation levels pre- and post-weaning |
Autor(es): | Silva, Aline Gomes da Paulino, Mário Fonseca Amorim, Lincoln da Silva Detmann, Edenio Moura, Felipe Henrique de Manso, Marcos Rocha Paiva, Paulo Henrique Silva e Ortega, Román Enrique Maza Melo, Luciano Prímola de Rennó, Luciana Navajas |
Abstract: | The present study was conducted to evaluate the effects of high and low supplementation levels pre- and post-weaning on performance, endocrine, metabolic, and reproductive responses of Nellore heifers. Fifty Nellore heifers with 132 ± 9.9 kg average body weight (BW) and 138 ± 19 days of age were supplemented from 4 to 14 months. The heifers were distributed into five supplementation plans: HH—6 g/kg of BW of supplement pre- and post-weaning, HL—6 g/kg of BW of supplement pre-weaning and 3 g/kg post-weaning, LH—3 g/kg of BW pre-weaning and 6 g/kg of BW post-weaning, LL—3 g/kg of BW pre- and post-weaning, and CC—control, no supplementation. Interactions were not significant (P > 0.10). The level of supplement fed pre-weaning did not affect any of the performance variables evaluated at the end of the experiment (P > 0.10). There was a significant effect of supplementation and level of supplementation fed post-weaning on average daily gain (ADG) and final BW (P < 0.05). Overall ADG was also affected only by supplementation and level of supplement fed post-weaning (P < 0.05) with animals receiving 6 g/kg of BW post-weaning gaining more weight. Follicular diameter was greater in animals that received 6 g/kg of BW post-weaning (P < 0.05). In summary, performance, endocrine, metabolic, and reproductive variables evaluated in the current study were improved by the level of supplement fed post-weaning. Heifers receiving supplementation of 6 g/kg of BW post-weaning had greater responses, independent of the level received during the pre-weaning phase. |
Palavras-chave: | Biometry Growth hormone Insulin Ruminant metabolism |
Editor: | Tropical Animal Health and Production |
Tipo de Acesso: | Springer Science+Business Media Dordrecht |
URI: | https://doi.org/10.1007/s11250-017-1248-1 http://www.locus.ufv.br/handle/123456789/19758 |
Data do documento: | 11-Fev-2017 |
Aparece nas coleções: | Artigos |
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artigo.pdf Until 2100-12-31 | Texto completo | 289,23 kB | Adobe PDF | Visualizar/Abrir ACESSO RESTRITO |
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