盐津水牛公牛和滇东南水牛公牛育肥性能及屠宰性能研究OA

The experiment aimed to investigate the differences in growth and development,slaughter performance,carcass quality,and visceral organ development of buffaloes with different genetic backgrounds.Ten Yanjin buffalo bulls(group YJ)and ten Southeast Yunnan buffalo bulls(group DDN)aged(33±3)months were selected.During the fattening period,each buffalo was supplemented with 3.0 kg/(head·d)of concentrate on the basis of ad libitum whole-plant corn silage.The pre-test period was 10 days,and the formal test period was 90 days.The results showed that the chest width of group YJ was extremely lower than that of group DDN(P<0.01),and the abdominal circumference was significantly lower than that of group DDN(P<0.05).The bone weight,bone percentage,backfat thickness,and skin thickness of group YJ were extremely higher than those of group DDN(P<0.01),the head weight and tail weight were significantly higher than those of group DDN(P<0.05),while the hoof weight was significantly lower than that of group DDN(P<0.05),the carcass meat yield and meat-to-bone ratio were extremely lower than those of group DDN(P<0.01).The lung and kidney weights of group YJ were significantly higher than those of group DDN(P<0.05).The omasum and abomasum weights were significantly lower than those of the DDN group(P<0.05).The small intestine,duodenum,and jejunum weights of group YJ were extremely significantly higher than those of group DDN(P<0.01).The study shows that Yanjin buffaloes have larger skeletons,stronger abilities in gas exchange,metabolic waste excretion,and body fluid balance regulation,and may have better absorption efficiency of soluble nutrients than Southeast Yunnan buffaloes,while the latter has higher utilization efficiency of fibrous feed.