文献类型： 外文期刊

作者： Wu, J. P. ¹ ; Zhou, R. ¹ ; Liu, L. S. ² ; Casper, D. P. ⁵ ; Lang, X. ² ; Wang, C. L. ² ; Zhang, L. P. ⁷ ; Wei, S. ⁷ ; Liu, H ¹ ;

作者机构： 1.Gansu Acad Agr Sci, Lanzhou 730070, Gansu, Peoples R China

2.Gansu Acad Agr Sci, Key Lab Sheep Goat & Cattle Gemplasm & Straw Feed, Lanzhou 730070, Gansu, Peoples R China

3.Northwest Normal Univ, Inst Rural Dev, Lanzhou 730070, Gansu, Peoples R China

4.Gansu Acad Agr Sci, Anim Husb Pasture & Green Agr Inst, Lanzhou 730070, Gansu, Peoples R China

5.Caspers Calf Ranch, 4890 West Lily Creek Rd, Freeport, IL 61032 USA

6.North Carolina A&T State Univ, Dept Anim Sci, Greensboro, NC 27411 USA

7.Gansu Agr Univ, Coll Anim Sci & Technol, Lanzhou 730070, Gansu, Peoples R China

8.Gansu Acad Agr Sci, Inst Agr & Econ Informant Ion, Lanzhou 730070, Gansu, Peoples R China

关键词： Average daily gain; Blood profiles; Essential oils; Frame growth; Immunity

期刊名称：ANIMAL （ 影响因子：3.24； 五年影响因子：3.223 ）

ISSN： 1751-7311

年卷期： 2021 年 15 卷 10 期

页码：

收录情况： SCI

摘要： Shifting ruminal fermentation via feeding a blend of oregano (Organum vulgare L.) essential oils and Co lactate (EOC; Rum-A-Fresh, Ralco, Inc. Marshall, MN) could improve lamb growth and carcass performance. Eighteen Suffolk x Little Han Tail F1 male lambs (20.3 +/- 0.23 kg BW and approximately 3 months old) were randomly assigned using a completely random design to one of three treatments. Treatments were (1) EOC0: basal ration without EOC, (2) EOC4: basal ration plus 4 g/d EOC, and (3) EOC7: basal ration plus 7 g/d EOC. Initial and 24 d BW was similar (P > 0.10), but at 48 and 72 d, lambs fed EOC7 demonstrated greater (P = 0.01) BW compared with EOC0 fed lambs, while lambs fed EOC4 were intermediate and similar (P > 0.05). Average daily gains (ADGs) for 0-24 and 0-72 d were greater (P < 0.05) for lambs fed EOC4 and EOC7 compared with lambs fed EOC0, while DM intake was similar (P > 0.10). Feed conversions for 0-24 d were improved (P < 0.02) for lambs fed EOC4 and EOC7 compared with lambs fed EOC0. However, 0-72-d feed conversions were greater (P < 0.01) for lambs fed EOC7 compared to lambs fed EOC0, with lambs fed EOC4 being intermediate and similar (P > 0.05). DM, NDF, and ADF digestibilities were similar (P > 0.10) among treatments, while CP digestibility was greater (P < 0.01) for lambs fed EOC4 and EOC7 compared with lambs fed EOC0. Carcass weight and dressing percentages were improved (P < 0.01) for lambs fed EOC7 compared with lambs fed EOC0 and EOC4. Head width was greater (P > 0.01) for lambs fed EOC7 compared with lambs fed EOC0 and EOC4, while rump width was greater (P > 0.01) for lambs fed EOC4 and EOC7 compared with lambs fed EOC0. Plasma triglyceride and cholesterol concentrations were lower (P < 0.05) for lambs fed EOC4 and EOC7 compared with lambs fed EOC0, while albumin, total serum protein, and glucose concentrations were greater (P < 0.05) for lambs fed EOC4 and EOC7 compared with lambs fed EOC0. Feeding an EOC blend as an alternative antibiotic growth promoter at 4 and 7 g/d linearly improved lamb growth performance, feed conversions, frame growth, carcass weights, dressing percentages, and immunity. (c) 2021 The Authors. Published by Elsevier B.V. on behalf of The Animal Consortium. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).