添喂气溶胶 OT 对小尾寒羊及策勒黑羊消化代谢的影响

摘要

Twelve heads of 2.5 -3.5 year’s old non-pregnant Small-tail Han (n = 6 )and Xinjiang Cele Black (n =6)ewes with body weight of 48.5 ±2.1 or 47.6 ±3.2 kg respectively were freely fed with the forage diet (ground maize stalk accounting for 70%).The effect of supplement of aerosol OT (0.8 g/kg di-et)on the digestion and metabolism of the Small-tail Han and Xinjiang Cele Black ewes was compared by self-control design.The result showed that by supplement of aerosol OT,the voluntary intake of DM of the Small-tail Han and Xinjiang Cele Black ewes was increased by 25.2% (P 0.05)and 8.3% (P >0.05)re-spectively;the apparent digestibility of OM was decreased by 7.9% (P >0.05)and 6.6% (P >0.05)respec-tively;the apparent digestibility of crude protein was decreased by 3.2% (P 0.05)respec-tively;the apparent digestibility of energy was decreased by 12.0% (P >0.05)and 8.3% (P >0.05)respectively;the digestibility of cellulose was increased by 1.1% (P >0.05)and 2.3% (P >0.05)respectively;the digestibility of hemicellulose was increased by 2 .3 % (P > 0 .0 5 )and 6 .2 % (P > 0 .0 5 )respectively ;nitrogen retention was increased by 13.7% (P >0.05)and 1 1.1% (P >0.05)respectively;calcium retention was increased by 25.2% (P 0.05)respectively.It was concluded that supplement of aerosol OT may significantly increase the voluntary intake and digestible amount of diet,improve the digestion and metabolism of sheep,howev-er,there was no significant difference between Small-tail Han and Xinjiang Cele Black ewes.%选取平均体重分别为(48．5±2．1)，(47．6±3．2)kg 的2．5~3．5岁空怀小尾寒羊和新疆策勒黑羊母羊各6只，自由采食粉碎玉米秸秆占70％的粗料型日粮，以自身对照设计，比较添喂气溶胶 OT(0．8 g/kg 日粮)对小尾寒羊、策勒黑羊消化代谢的影响.结果表明，添喂气溶胶后小尾寒羊和策勒黑羊的干物质自由采食量分别提高25．2％(P ＜0．01)和25．3％(P ＜0．01)；干物质表观消化率分别降低12．0％(P ＞0．05)和8．3％(P ＞0．05)；有机物表观消化率分别降低7．9％(P ＞0．05)和6．6％(P ＞0．05)；粗蛋白表观消化率分别降低3．2％(P ＜0．05)和4．3％(P ＞0．05)；能量表观消化率分别降低12．0％(P ＞0．05)和8．3％(P ＞0．05)；纤维素消化率分别提高1．1％(P ＞0．05)和2．3％(P ＞0．05)；半纤维素消化率分别提高2．3％(P ＞0．05)和6．2％(P ＞0．05)；氮保留分别增加13．7％(P ＞0．05)和11．1％(P ＞0．05)；钙保留分别增加25．2％(P ＜0．01)和21．2％(P ＜0．05)；磷保留分别增加24．3％(P ＜0．05)和18．2％(P ＞0．05).添喂气溶胶 OT 可提高绵羊自由采食量和消化量，改善绵羊的消化代谢，但在小尾寒羊和新疆策勒黑羊母羊间没有显著差异.