添喂气溶胶OT对小尾寒羊及策勒黑羊消化代谢的影响

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。

Effects of Supplement of Aerosol OT on Digestion and Metabolism of the Non-pregnant Small-tail Han and Xinjiang Cele Black Ewes

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 diet） 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. 01） and 25. 3%（ P 0. 01） respectively; the apparent digestibility of DM was decreased by 12. 0%（ P 0.05） and 8. 3%（ P 0. 05） respectively; the apparent digestibility of OM was decreased by 7. 9%（ P 0. 05） and 6.6%（ P 0. 05） respectively; the apparent digestibility of crude protein was decreased by 3. 2%（ P 0. 05） and 4. 3%（ P0.05） respectively; 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 11. 1%（ P 0. 05） respectively; calcium retention was increased by25. 2%（ P 0. 01） and 21. 2%（ P 0. 05） respectively; phosphorus retention was increased by 24. 3%（ P 0.05） and 18. 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,however,there was no significant difference between Small-tail Han and Xinjiang Cele Black ewes.