马程程
工程造价管理 摘要对河南省鼎元种牛育种有限公司的荷斯坦、西门塔尔、夏洛来、利木赞和红安格斯5个品种韩国sm娱乐有限公司0～24月龄的种公牛体重记录，采用Logistic、Compertz和Bert模型进行了非线性回归分析。结果表明，荷斯坦、西门塔尔、夏洛来、利木赞和红安格斯5个品种种公牛采用Bert模型拟合效果最好，均达99.4%以上；采用Bert模型拟合的5个品种种公牛早期的体重生长曲线在达到拐点日龄以前，日增重是持续增长的，达到拐点日龄后，日增重缓慢下降；红安格斯种公牛22～24月的日增重占最大日增重的比率最小，是台湾选举2019最新消息41.3%，西门塔尔次之（51.2%），荷斯坦种公牛体重日增重下降最慢（62.2%）；种公牛8个月以前，西门塔尔种公牛日增重均依次高于夏洛来、荷斯坦、红安格斯和利木赞，种公牛8个月以后，夏洛来种公牛的日增长速度超过西门塔尔，利木赞种公牛的生长速度超过红安格斯。
关键词种公牛；生长曲线；拟合度
中图分类号S823文献标识码A文章编号0517-6611（2014）14-04352-02
Analysis of Growth Curve of Growing Bulls
CHEN Jiangling et al（Henan Breeding Cattle Genetic Properties Testing Center， Zhengzhou， Henan 450008）
AbstractThe nonlinear regression analysis was conducted on weight records of Holstein， Simmental， Charolais， Limousin and red Angus bulls of Henan Dingyuan Cattle Breeding CO.LED bu using Logistic， Compertz and Bertallanffy （Bert） model. The results showed that：东野圭吾电影 the Bert model which was more than 99.4% Rsquared was the best to the five varieties bulls. The weight growth rate of the five varieties bulls before reaching the inflection point was successively increased by Bert model， and then slowly declined， the daily weight gain of red Angus in 2224 months accounted for the largest daily weight， ratio is 41.3%， the second was Simmental （51.2%）， Holstein decreased most slowly （62.2%）. Before 8 months， the daily weight gain of Simmental bulls was successively higher than Charolais， Holstein回族有哪些节日， red Angus and Limousin bulls. 8 months later， the daily weight gain of Charolais bulls was higher than Simmental， Limousin bulls higher than red Angus.
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