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首页> 外文期刊>Tropical Animal Health and Production >Comparative studies on growth traits of Sanga and Friesian-Sanga crossbred calves raised on natural pasture on the Accra Plains of Ghana
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Comparative studies on growth traits of Sanga and Friesian-Sanga crossbred calves raised on natural pasture on the Accra Plains of Ghana

机译：加纳阿克拉平原天然牧场饲养的桑加和弗里斯桑-桑加杂交小牛生长特性的比较研究

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摘要

Data collected from 1993 to 2006 at the Animal Research Institute of Ghana was used to compare the performance of Sanga and Friesian-Sanga crossbred calves on natural pasture. Performance traits analyzed were birth weight (BWT), weaning weight adjusted to 210 days (WW7), preweaning average daily gain to 210 days (ADG 1), weight at 12 months adjusted to 365 days (W12), weight at 18 months adjusted to 540 days (W18) and postweaning average daily gain (ADG 2, from weaning to 540 days). Effects in the model describing these traits were breed, season, sex and first-order interactions between these effects. With the exception of heavier birth weight of Friesian-Sanga crossbred calves (19.98 kg vs. 19.18 kg), body weights of Sangas at weaning, 12 months and 18 months exceeded those of the Friesian-Sanga crossbred calves by 3.76 kg, 35.06 kg and 46.24 kg respectively. The Sangas were also superior in preweaning average daily gain (0.35 kg/day vs. 0.26 kg/day) and postweaning average daily gain (0.28 kg/day vs. 0.21 kg/day). There was a tendency of increasing weight difference between the two breeds with advancing age. It was suggested that improved nutrition such as supplementary feeding would be necessary for crossbreds to express their potential for growth.
机译：从1993年至2006年在加纳动物研究所收集的数据用于比较Sanga和Friesian-Sanga杂交犊牛在天然牧场上的性能。分析的性能特征为出生体重（BWT），断奶体重调整为210天（WW7），断奶前平均日增重为210天（ADG 1），12个月体重调整为365天（W12），18个月体重调整为540天（W18）和断奶后平均日增重（ADG 2，从断奶到540天）。在描述这些特征的模型中，效应是品种，季节，性别以及这些效应之间的一级相互作用。除了Friesian-Sanga杂交犊牛的出生体重较重（19.98 kg和19.18 kg）之外，断奶，12个月和18个月时Sangas的体重比Friesian-Sanga杂交犊牛的体重分别高3.76 kg，35.06 kg和分别为46.24公斤。 Sangas的断奶前平均日增重（0.35公斤/天vs. 0.26公斤/天）和断奶后平均日增重（0.28公斤/天vs. 0.21公斤/天）也很出色。随着年龄的增长，两个品种之间的体重差异有增加的趋势。有人提出，为了使杂种表达其生长潜力，有必要改善营养，例如补充喂养。

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