不同蛋白水平全价颗粒饲料对育肥公羊育肥效果对比研究

本研究主要探讨不同蛋白水平全价颗粒饲料对育肥公羊育肥效果对比。选择体重20 kg左右公羊共计120只（湖羊、澳湖杂交羊、欧拉羊、湖藏杂交羊、萨湖杂交羊各24只），每一个品种公羊随机平均分为3组，分别饲喂蛋白含量12.96%（LP组）、15.04 %（MP组）、17.04 %（HP组）的全价颗粒饲料，饲喂105 d，研究体重、养殖效益、体尺相关性等指标。结果显示：湖羊、澳湖、萨湖MP组和HP组羊日增重显著高于LP组（P<0.01），湖藏杂交羊3组间差异不显著（P>0.05），欧拉羊日增重HP组显著高于其他2组（P<0.05），澳湖、萨湖羊增重速度最快，日增重达到300 g以上；湖羊、澳湖、萨湖、湖藏MP组和HP组羊料重比显著低于LP组（P<0.01），欧拉羊3组差异均显著（P>0.05），不同品种羊MP组日养殖效益均优于HP组；湖羊、澳湖、萨湖、湖藏羊体重与各体尺之间呈极显著正相关（P<0.01），欧拉羊体重与体长呈极显著相关（P<0.01），体重与胸围、体长呈显著相关（P<0.05）。

Comparative Study on the Fattening Effects of Complete Price Pellet Feeds with Different Protein Levels on Fattening Rams

This study mainly explores the comparison of the fattening effects of complete price pellet feeds with different protein levels on fattening rams. We selected a total of 120 rams weighing about 20 kg (24 each from Hu sheep, Aohu hybrid sheep, Euler sheep, Huzang hybrid sheep, and Sahu hybrid sheep). Rams of each breed were randomly divided into 3 groups and fed respectively full price pellet feed with protein content of 12.96% (LP group), 15.04% (MP group), and 17.04% (HP group). We fed for 105 days and studied indicators such as body weight, breeding efficiency, and body size correlation. The results showed that the daily weight gain of sheep in the MP group and HP group of Hu sheep, Aohu, and Sahu was significantly higher than that of the LP group (P<0.01). There was no significant difference among the three groups of Hu Tibetan hybrid sheep (P>0.05). The daily weight gain of Euler sheep in the HP group was significantly higher than that of the other two groups (P<0.05). Aohu and Sahu sheep gain weight the fastest, with a daily weight gain of more than 300g. The feed weight ratio of sheep in Huyang, Aohu, Sahu and Huzang MP groups and HP groups was significantly lower than that in the LP group (P<0.01). There were significant differences among the three groups of Euler sheep (P>0.05). The daily breeding efficiency of MP group of different breeds of sheep was better than that of HP group. There was a highly significant positive correlation between body weight and body size of Hu sheep, Aohu, Sahu and Huzang sheep(P<0.01). The weight of Euler sheep was highly significantly correlated with body length(P<0.01), and the weight was significantly correlated with chest circumference and body length(P<0.05).