Test post-weaning duration for performance, feed intake and feed efficiency in Nellore cattle

被引：8

作者：

de Castilhos, Andre Michel ^{[1
]}

Branco, Renata Helena ^{[2
]}

Razook, Alexander George ^{[2
]}

Martins Bonilha, Sarah Figueiredo ^{[2
]}

Zerlotti Mercadante, Maria Eugenia ^{[2
]}

de Figueiredo, Leopoldo Andrade ^{[2
]}

机构：

[1] Univ Estadual Paulista, FMVZ UNESP Botucatu, Sao Paulo, Brazil

[2] Centro APTA Bovinos Corte Sertaozinho, Inst Zootecnia, Sertaozinho, SP, Brazil

来源：

REVISTA BRASILEIRA DE ZOOTECNIA-BRAZILIAN JOURNAL OF ANIMAL SCIENCE | 2011年 / 40卷 / 02期

关键词：

cattle; feeding performance test; residual feed intake; BEEF-CATTLE; GROWTH-RATE;

D O I：

10.1590/S1516-35982011000200010

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

This study was conducted to determine optimum test duration for measuring performance, feed intake and feed efficiency. Sixty young Nellore bulls were submitted to feeding performance test and fed in individual pens to determine feed intake and performance over 112 days. Body weight was determined every 28 days, after fasting of water and feed for 16 hours. Changes in variance, relative variance and Pearson and Spearman correlations among data from shortened test periods (28, 56 and 84 days) and full test period (112 days) were used to determine optimum test duration. Test duration for average daily gain, dry matter intake, feed: gain ratio and residual feed intake could be shortened to 84, 28, 84 and 84 days, respectively, without reducing significantly the reliability of measurements for animals fed in individual pens.

引用

页码：301 / 307

页数：7

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