Creatinine excretion and relationship with body weight of Nellore cattle

Revista Brasileira de Zootecnia

Prados, Laura Franco¹  Chizzotti, Mário Luiz²  Zanetti, Diego²  Braga, Jercyane Maria da Silva¹  Valadares Filho, Sebastião de Campos²  Rotta, Polyana Pizzi¹  Valadares, Rilene Ferreira Diniz²  Silva, Luiz Fernando Costa e² 

[1] Universidade Federal de Viçosa

关键词: crude protein;    muscle tissue;    total collection;    urine     Introduction One of the biggest problems found in the experiments conducted with cattle is the total urinary collection to estimate the purine derivatives in urine;   

DOI  :  10.1590/S1516-35982012000300046

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

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 least three days. At the end of each collection, the animals were weighted. Urinary creatinine excretion (UCE) was related with the shrunk body weight and it can be estimated by the equation: UCE (g/day) = 0.0345 × SBW0.9491.

【 授权许可】

CC BY-NC