|
|
|
|
|
| Rocha,Anilza Andréia da; Paulino,Mário Fonseca; Fernandes,Henrique Jorge; Barros,Lívia Vieira de; Lopes,Sidnei Antonio; Galon,Leandro; Silva,Aline Gomes da; Almeida,Daniel Mageste de. |
| The objective of this experiment was to estimate the requirements of energy, protein and macrominerals of grazing crossbreds calves, in Brachiaria decumbens Stapf pasture, castrated at different ages, with and without supplementation. Forty-seven young calves at initial age of 120±30.1 days and 115.3±1.97 kg of live weight were used. To estimate net energy requirements for weight gain, a regression equation between energy retained in the gain and empty body weight gain and metabolic empty body weight was obtained. For estimation of net protein requirements for weight gain, a regression equation was adjusted between protein retained in gain and empty body weight gain and energy content of this gain. Net requirements of Ca, P, Mg and Na for weight gain were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Castration; Supplementation; Zebu cattle. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000200025 |
| |
|
|
| Rocha,Anilza Andréia da; Paulino,Mário Fonseca; Fernandes,Henrique Jorge; Barros,Lívia Vieira de; Lopes,Sidnei Antonio; Galon,Leandro; Silva,Aline Gomes da; Almeida,Daniel Mageste de. |
| The objective of this study was to evaluate performance and nutritional traits of beef cattle raised on pastures, castrated at different ages, with and without supplementation. Forty-four crossbred young bulls with predominance of Zebu breed at initial average age of 120±30 days were used in the experiment. Animals were distributed in a completely randomized design in a factorial arrangement with four ages of castration and two supplementation systems. The animals were distributed into four groups and placed on Brachiaria decumbens Stapf pastures, where they were fed concentrate supplementation or mineral salt ad libtum (control). Animals were castrated at 120, 240 and 360 days of age with average body weight of 115, 175 and 276 kg, castrated or not, in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Castration; Digestibility; Intake; Supplementation. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000400026 |
| |
|
|
|
