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https://locus.ufv.br//handle/123456789/22185
Tipo: | Artigo |
Título: | Nellore cows and their calves during the lactation period: performance, intake, milk composition, and total apparent digestibility |
Autor(es): | Silva, Luiz Fernando Costa e Engle, Terry Eugene Valadares Filho, Sebastião de Rotta, Polyana Pizzi Villadiego, Faider Alberto Castaño Silva, Flávia Adriane Sales Martins, Edilane Costa Silva, Luis Henrique Rodrigues Paulino, Mário Fonseca |
Abstract: | An experiment was conducted to evaluate intake and nutrient digestibility, performance, milk composition, and microbial efficiency of Nellore cows and their calves during lactation. Fifteen Nellore cows were fed corn silage and concentrate (85:15). After calving, calves were kept with their dams for 2 months then separated and housed in individual pens adjacent to their dams. Cows were milked every 15 days over 7 months to estimate milk intake of the calves. During lactation, nutrient intake decreased (P < 0.01) for cows, while nutrient digestibility increased (P < 0.001). Starting 2 months post-calving, calves were offered concentrate (5 g/kg body weight (BW)) and roughage. An increase in DM digestibility was observed for calves in the third month of age, probably due to an associative effect between milk, concentrate, and roughage, which increased DM digestibility without increasing DM intake. Average daily gain (ADG) of the calves increased (P < 0.001) during lactation period. Microbial efficiency (g mCP/kg total digestible nutrients (TDN)) did not change (P > 0.05) in either cows or their calves during lactation period. However, nutrient digestibility decreased for calves during this period. Nellore cows produced milk with average of 4.58 % lactose, 5.61 % fat, and with milk protein increasing from 3.6 to 4.0 % as lactation progressed. |
Palavras-chave: | Beef cattle Bos indicus Lactation Milk composition Weight gain |
Editor: | Tropical Animal Health and Production |
Tipo de Acesso: | Springer Nature Switzerland AG. |
URI: | http://dx.doi.org/10.1007/s11250-015-0787-6 http://www.locus.ufv.br/handle/123456789/22185 |
Data do documento: | 26-Fev-2015 |
Aparece nas coleções: | Artigos |
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artigo.pdf Until 2100-12-31 | texto completo | 332,06 kB | Adobe PDF | Visualizar/Abrir ACESSO RESTRITO |
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