摘要
选用４０头杜长大肥育猪进行饲养和屠宰试验，研究了Ｒａｃｔｏｐａｍｉｎｅ对饲喂不同蛋白（１３．５０％和１８．００％）水平饲粮肥育猪生长性能和胴体组成的影响。试验结果表明：在１８．００％蛋白水平下，Ｒａｃｔｏｐａｍｉｎｅ（２０ｍｇ／ｋｇ）使猪日增重提高了９．０３％（Ｐ＜０．０５），料重比下降了１４．４８％，而在１３．５０％蛋白水平下，Ｒａｃｔｏｐａｍｉｎｅ对日增重和料重比均无明显影响；添加Ｒａｃｔｏｐａｍｉｎｅ，胴体组成发生了明显改变，饲粮蛋白为１３．５０％和１８．００％时，胴体瘦肉率分别提高了４．５（Ｐ＜０．０５）和４．１８个百分点（Ｐ＜０．０１），脂肪率分别下降了４．０９（Ｐ＜０．０５）和４．１９个百分点（Ｐ＜０．０１）；此外，本研究发现Ｒａｃｔｏｐａｍｉｎｅ对不同骨骼肌的作用效果存在显著差异，背最长肌、股二头肌和半腱肌明显增大（Ｐ＜０．０５），而股四头肌和臀中肌无明显变化。肉质测定显示，Ｒａｃｔｏｐａｍｉｎｅ对背最长肌大理石纹、色泽、系水力、ｐＨ值等指标均无显著影响。
Forty finishing pigs were used to study the effects of Ractopamine on finishing swine at different dietary protein levels.The results showed that Ractopamine(20mg/kg)increased ADG of pigs by 9.03%(P<0 05),decreased FCR by 14.48%,and FI by 6.5% at 18.00% dietary protein level,but no significant differences were found at 13.50% dietary protein levels.Both at 13.50% and 18.00% dietary protein levels,supplementing Ractopamine in finishing diet changed the carcass composition.It increased carcass lean ratio by 4 5(P<0.05)and 4.18 percentage points (P<0.01),and decreased carcass fat ratio by 4.09(P<0.05)and 4 19 percentage points(P<0.01),respectively.Furthermore,it was found that Ractopamine had different effects in selected muscles.but no significant differences in pH value,marbling,colour and water holding capacity of LD were observed.
出处
《浙江农业学报》
CSCD
1998年第4期210-214,共5页
Acta Agriculturae Zhejiangensis
基金
国家科委资助
