Abstract:This study mainly explores the comparison of the fattening effects of completeprice 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 fullprice 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 HuTibetan 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).
