饲粮中添加牛至精油对牛肉脂肪酸含量及氧化稳定性的影响

发布时间：2018-04-05 02:27

本文选题：肉牛　切入点：饲粮　出处：《甘肃农业大学学报》2017年04期

【摘要】：【目的】研究饲粮中添加牛至精油对牛肉脂肪酸含量及氧化稳定性的影响.【方法】选择10头体质量相近、健康的‘荷斯坦’公牛,随机分为试验组(添加牛至精油)和对照组(未添加牛至精油),每组5头,试验组每头牛每天添加牛至精油28g,相同环境下饲喂8个月后屠宰,测定牛肉脂肪酸含量及氧化稳定性.【结果】饲粮中添加牛至精油使背最长肌中饱和脂肪酸(SFA)含量显著低于对照组(P0.05),不饱和脂肪酸含量(UFA)显著高于对照组(P0.05),包括油酸、亚油酸以及人体所需的必需脂肪酸n-6多不饱和脂肪酸,同时多不饱和脂肪酸和饱和脂肪酸比值(P/S)也比对照组高0.06(P0.05).熟化3d后,试验组牛肉脂质氧化速率显著降低(P0.05).【结论】饲粮中添加牛至精油可以调控牛肉中脂肪酸的合成,使饱和脂肪酸显著降低,不饱和脂肪酸显著升高,多不饱和脂肪酸和饱和脂肪酸比值也升高到0.43更加接近膳食推荐值0.45,降低脂质氧化速率,提高氧化稳定性.
[Abstract]:[objective] to study the effect of dietary essential oil on fatty acid content and oxidative stability of beef. [methods] Ten healthy Holstein bulls with similar body weight were selected.They were randomly divided into experimental group (supplemented with essential oil of oregano) and control group (5 in each group without adding essential oil of oregano). Each cow in test group was fed with 28 g of essential oil of oregano every day and slaughtered in the same environment after feeding for 8 months.[results] the content of saturated fatty acid (SFAs) in the longissimus dorsi muscle was significantly lower than that in the control group (P 0.05), and the content of unsaturated fatty acid (UFAA) was significantly higher than that of the control group (P 0.05), including oleic acid.Linoleic acid and essential fatty acid n-6 polyunsaturated fatty acid, and the ratio of polyunsaturated fatty acid to saturated fatty acid (P / S) were also higher than that of the control group.After 3 days of maturation, the lipid oxidation rate of beef in the test group decreased significantly (P 0.05). [conclusion] the addition of essential oil to diet can regulate the synthesis of fatty acids in beef, decrease the saturated fatty acids and increase the unsaturated fatty acids significantly.The ratio of polyunsaturated fatty acids to saturated fatty acids increased to 0.43, which was closer to the recommended dietary value of 0.45, which reduced the oxidation rate of lipid and improved the oxidation stability.
【作者单位】：甘肃农业大学动物科学技术学院;
【基金】：兰州市科技局战略性新兴产业技术攻关专项“兰州市高产奶牛选育策略与高校养殖技术研究示范”(2011-1-110) 农业部“绒毛用羊产业技术体系放牧生态岗位科学家”项目(CARS-40-09B) 国家外专局文教类高端外国专家项目“甘肃省典型农区肉牛生产体系优化研究与应用”(GDT20146100035) 甘肃省外专局文教类引进外国专家项目“甘肃肉牛生产体系要素优化匹配研究”(LW20156200007) 农业部公益性行业(农业)科研专项项目“北方作物秸秆饲用化利用技术研究与示范”(201503134-HY15038488)
【分类号】：S823.5

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