Department of Animal Sciences, Faculty of AgriSciences, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa.
Department of Veterinary Tropical Diseases, Faculty of Veterinary Sciences, University of Pretoria, Private Bag X4, Onderstepoort 0110, South Africa.
Meat Sci. 2023 Jan;195:109009. doi: 10.1016/j.meatsci.2022.109009. Epub 2022 Oct 19.
The study evaluated the effects of feeding incremental levels of sericea lespedeza (SL; 0, 62.5, 125, 187.5 and 250 g/kg diet) substituted for lucerne on meat production, quality, and oxidative shelf-life of feedlot lambs infected or non-infected with Haemonchus contortus. There were no diet × infection status, and diet × retail display period effects for all the tested parameters (P > 0.05). Relative to the other diets, the 250 g/kg SL diet decreased (P ≤ 0.05) lamb growth performance and carcass yield. The SL diets experienced less (P ≤ 0.05) meat lipid oxidation than the control diet. Worm infection reduced (P ≤ 0.05) carcass yield and income-over-feed-costs without affecting meat quality (P > 0.05). Feeding SL had no effects on meat physicochemical, fatty acid, colour, and protein shelf-life profiles (P > 0.05). Overall, substituting lucerne with SL up to 187.5 g/kg in lamb feedlot diets has no effects on meat production and quality but enhances lipid stability regardless of infection.
本研究评估了用羽扇豆（SL；0、62.5、125、187.5 和 250 g/kg 日粮）替代紫花苜蓿对感染或未感染捻转血矛线虫的育肥羔羊的肉生产、质量和氧化货架期的影响。对于所有测试参数，均未观察到日粮×感染状态和日粮×零售展示期的影响（P>0.05）。与其他日粮相比，250 g/kg SL 日粮降低了羔羊的生长性能和胴体产率（P≤0.05）。SL 日粮的肉脂氧化程度低于对照组（P≤0.05）。蠕虫感染降低了（P≤0.05）胴体产率和投入产出比，而不影响肉品质（P>0.05）。饲喂 SL 对肉的理化特性、脂肪酸、颜色和蛋白质货架期没有影响（P>0.05）。总的来说，在育肥羔羊日粮中用 SL 替代紫花苜蓿高达 187.5 g/kg 不会影响肉的生产和质量，但无论感染与否，都能提高脂肪稳定性。
