期刊文献

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

测试断奶后持续时间性能，采食量和饲料效率内洛尔牛
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作者
CASTILHOS, ;ré Michel de et al.
关键词
beef cattle; feeding performance test; residual feed intake.
关键词译文
肉用牛;喂养性能测试;剩余采食量
页码
301-307
DOI
10.1590/S1516-35982011000200010
来源信息
Revista Brasileira de Zootecnia ISSN：1516-3598, 2011年, 40卷, 2期, 301-307页
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
摘要译文
本研究是为了确定最佳的测试时间，用于测量性能，采食量及饲料efficiencySixty年轻内洛尔公牛被提交给馈送性能测试，并在个别的笔送入确定采食量和性能超过112 daysBody重量每28确定天，水空腹和缩短测试时间段（28，56和84天）和完整的测试周期（112天）饲料的方差相对方差和Pearson和Spearman相关数据中的16 hoursChanges之后被用来确定最佳对于平均日增重，干物质采食量，饲料测试durationTest持续时间：增益比和残余饲料摄取量可以缩短到分别为84，28，84和84天，无显著降低测量的可靠性在个别笔喂养的动物
CASTILHOS, ;ré Michel de et al.. Test post-weaning duration for performance, feed intake and feed efficiency in Nellore cattle.[J]. Revista Brasileira de Zootecnia, 2011,40(2): 301-307