饲粮中添加柑橘渣或葡萄渣对肉牛不饱和脂肪酸、挥发性风味物质及感官特性的影响。
Polyunsaturated fatty acid, volatile and sensory profiles of beef from steers fed citrus pulp or grape pomace.
机构信息
Department of Animal Sciences, Faculty of AgriSciences, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa.
Department of Food Science, Faculty of AgriSciences, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa.
出版信息
Food Res Int. 2021 Jan;139:109923. doi: 10.1016/j.foodres.2020.109923. Epub 2020 Nov 28.
The present study compared the effects of feeding dried grape pomace (DGP) or citrus pulp (DCP) at 150 g/kg dry matter compared to a control diet on major polyunsaturated fatty acids (PUFA), volatile and sensory profiles of beef. Feeding DGP or DCP diets to Angus steers for 90 d increased the proportions of C18:2n-6, C20:4n-6, C18:3n-3, total conjugated linoleic acid (CLA), n-3 and n-6 PUFA in muscle. Control-fed beef had greater concentrations of C18:1n-9, total aldehydes, ketones, and alcohols compared to DCP and DGP. Feeding DGP and DCP diets produced less tender beef than control. Overall, finishing steers on diets containing DGP or DCP compared to control increased proportions of total CLA, n-3 and n-6 PUFA, and reduced concentrations of aldehydes, ketones, and alcohols, but did not affect beef sensory attributes except for a slight reduction in tenderness.
本研究比较了以 150g/kg 干物质的干葡萄渣（DGP）或柑橘渣（DCP）代替对照日粮对牛肉中主要多不饱和脂肪酸（PUFA）、挥发性和感官特性的影响。用 DGP 或 DCP 日粮育肥安格斯牛 90 天，增加了肌肉中 C18:2n-6、C20:4n-6、C18:3n-3、总共轭亚油酸（CLA）、n-3 和 n-6 PUFA 的比例。与 DCP 和 DGP 相比，对照日粮喂养的牛肉中 C18:1n-9、总醛、酮和醇的浓度更高。与对照相比，用 DGP 和 DCP 日粮育肥的牛肉更不嫩。总体而言，与对照相比，用 DGP 或 DCP 日粮育肥的肥育牛增加了总 CLA、n-3 和 n-6 PUFA 的比例，降低了醛、酮和醇的浓度，但除了嫩度略有下降外，对牛肉的感官特性没有影响。
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