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| Costa e Silva,Luiz Fernando; Marcondes,Marcos Inácio; Valadares Filho,Sebastião de Campos; Ribeiro,André Mauric Frossard; Prados,Laura Franco; Nascimento,Fernando Barros; Gionbelli,Mateus Pies; Santos,Ronald Matos dos. |
| This study was conducted to develop equations to predict chemical composition of head, limbs, hide and blood in cattle. A database containing 335 animals from 10 trials, with 221 Nellore, 38 Nellore-Simmental and 76 Nellore-Angus (96 steers, 118 heifers and 121 bulls) animals was used. Models were constructed to estimate water, ether extract (EE), crude protein (CP), ash and macrominerals (calcium, phosphorus, magnesium, sodium and potassium) in the non-carcass parts of cattle. A stepwise procedure was conducted to determine the most significant variables within each model. Subsequently, a random coefficient model was used to construct the equation using studies as random effect, and sex and breed as fixed effects. The visceral fat was the most important... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Blood; Carcass; Ether extract; Hide; Organs and viscera; Protein. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000800015 |
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| Braga,Jercyane Maria da Silva; Valadares,Rilene Ferreira Diniz; Pellizzoni,Samantha Gusmão; Valadares Filho,Sebastião de Campos; Prates,Luciana Louzada; Costa e Silva,Luiz Fernando. |
| The objectives of this experiment were to estimate the endogenous excretion of purine derivatives (PD), the intake and digestibility of nutrients, the urinary excretion of PD from the intake of total digestible nutrients (TDN) and digestible organic matter (DOM) in Nellore heifers. Eight heifers, 267±17 kg body weight (BW), were assigned to two 4 × 4 latin squares. The planned treatments were four dry matter intake (DMI) levels: 10, 14, 18 and 22 g/kg BW. The diet contained 70% corn silage and 30% concentrate. The endogenous losses were obtained by regression between excretion of PD (mmol/BW0.75) and DMI (g/BW0.75). When PD excretion (mmol/d) was related to the intake of DOM and TDN (kg/d), the following equations were obtained: ŶPD= 32.98 + 21.94*DOM and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cattle; Endogenous excretion; Microbial protein. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000800014 |
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