夏洛莉二品種與三品種雜交公牛屠體性狀之調查

79頭產於1995、1996、1997及1998年之夏聖雜種（（C×SG），夏格聖雜種（C×GS），夏布雜種（C×B）及夏格布雜種（C×GB）之公牛，以圈飼肥育方式飼養至體重550 kg或2歲齡時進行屠宰，以比較屠体性狀。結果顯示，在屠體重方面，四種雜交品種間以夏布雜種及夏格布雜種有較重屠體，而夏聖雜種及夏格聖雜種有較輕屠體，其間並無品種間的差異存在。在屠宰率方面，夏聖雜種及夏布雜種之二品種雜交牛有較高的屠宰率，而夏格聖雜種及夏格布雜種之三品種雜交牛則有較低的屠宰率，其間同樣無品種差異存在。四組之總體脂重佔屠體百分比方面，同時亦無品種間的差異存在。但在屠體之背脂厚度方面，夏布雜種及夏格布雜種則有顯著較薄的背脂（P＜0.05）。在腰眼面積方面，雖然夏布雜種公牛的腰眼面積較大，但其腰眼的品質評分分佈較差，且品種間差異顯著（P＜0.05）。在精肉率方面，雖然以夏布雜種最高，但四品種間並無品種間的差異存在。在全牛的精肉零售價格方面，以夏布雜種所產生的牛肉價值較其他品種為高，但無品種間的差異存在。由以上結果顯示，利用夏洛莉雜交布拉曼牛之夏洛莉牛二品種，在屠體性狀方面可獲得顯著之改善。

關鍵字

聖達牛；布拉曼牛；夏洛莉牛；二品種；三品種；屠體性狀

並列摘要

Seventy nine crossed bulls, which came from four breed types; Charolais x Santa Gertrudis, Charolais x Brahman, Charolais x Gel-santa (GS) and Charolais x Gel-bra (GB); during 1995 to 1998, were fattened and slaughtered at 550 kg of body weight or two years of age. The carcass trait data was collected for comparison. Results showed that Charolais x Brahman had highest dressing percentage and carcass weight, but less back fat than any others breeds, and there were significant differences among four breeds (p＜0.05). The carcass fat percentage among breeds was not significantly different from each other. Charolais x Brahman had larger longissimus muscle area but poor marbling scores than the others. Breed effects were also significantly different amony the breeds. Charolais x Brahman produced more meat and highest retail price of carcass than the others hybrid cattle, although the breed effects were not significant different. These results indicated that the economical profit on carcass traits could be obtained from Charolais -sired crossbred with Brahman.

並列關鍵字

Santa Gertrudis ； Brahman ； Charolais ； Two way crossed ； Three way crossed ； Carcass traits

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