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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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| Silva,Luiz Fernando Costa e; Valadares Filho,Sebastião de Campos; Chizzotti,Mário Luiz; Rotta,Polyana Pizzi; Prados,Laura Franco; Valadares,Rilene Ferreira Diniz; Zanetti,Diego; Braga,Jercyane Maria da Silva. |
| The objective of this study was to estimate the urinary creatinine excretion by the shrunk body weight (SBW). In experiment I, 32 Nellore bulls with initial body weight of 259±24.9 kg and 14±1 months-old were used. The group was divided in four animals to maintenance and twenty eight animals feeding ad libitum and separated in four groups; each group was slaughtered at different times of feedlot (42, 84, 126 and 168 days). The diet was composed of corn silage and concentrate (55:45). Before the slaughters, the total urinary collection was realized during three days. A database of creatinine excretion was collected from other five studies that had been conducted with Nellore cattle. In all the studies, the total urinary collection was realized during at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crude protein; Muscle tissue; Total collection; Urine. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000300046 |
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