胡麻油和苹果酸对延边黄牛瘤胃脂肪酸代谢及饲料降解率的影响

发布时间：2019-06-08 06:41

【摘要】：试验旨在研究基础日粮中添加胡麻油和苹果酸对延边黄牛瘤胃脂肪酸代谢及日粮养分降解率的影响。选用4头平均体重为(350±15)kg、安装永久性瘤胃瘘管的延边黄牛,懫用4×4拉丁方设计,设1个对照组、3个试验组:对照组(CON组)饲喂基础日粮,LO组饲喂基础日粮+475g/d胡麻油;LOM组饲喂基础日粮+475g/d胡麻油+160g/d苹果酸;LOMS组饲喂基础日粮+475g/d胡麻油+160g/d苹果酸+47.5g/d小苏打(NaHCO3)。在正试期第3、4天采集瘤胃液测定其脂肪酸含量,在正试期第5、6天采用尼龙袋法测定饲料在瘤胃内的降解率。结果显示:除了饲喂后6h瘤胃t11-C18∶1含量外,3个试验组在各个时间点的瘤胃各脂肪酸含量均显著高于CON组(P0.05),且3个试验组间无显著差异(P0.05);与CON组相比,LO组瘤胃DM、OM、CP及NDF的降解率均有所降低,但LOM和LOMS组瘤胃DM、OM、CP及NDF的降解率均有一定程度提高。综合以上结果,日粮中单独或同时添加胡麻油、苹果酸均有利于提高延边黄牛瘤胃液中的脂肪酸含量;日粮中单独添加胡麻油会降低日粮养分在瘤胃中的降解率,而同时添加胡麻油和苹果酸在一定程度上可提高日粮养分在瘤胃中的降解率。
[Abstract]:The purpose of the experiment was to study the effects of flax oil and malic acid on rumen fatty acid metabolism and nutrient degradation rate of Yanbian yellow cattle. Four Yanbian yellow cattle with an average weight of (350 卤15) kg, and permanent rumen fistula were designed with 4 脳 4 La Ding Fang design. One control group and three experimental groups were fed with basic diet: control group (CON group), control group (control group). The LO group was fed with 475g/d flax oil, a basal diet. LOM group was fed with basic diet 475g/d flax oil 160g/d malic acid, and LOMS group was fed with 475g/d flax oil 160g/d malic acid 47.5g/d baking soda (NaHCO3). The fatty acid content of rumen juice was measured on the 3rd and 4th day of the positive test period, and the degradation rate of feed in rumen was determined by nylon bag method on the 5th and 6th day of the positive test period. The results showed that except for rumen t11-C18:1 content 6 hours after feeding, the contents of rumen fatty acids in the three groups were significantly higher than those in the CON group at each time point (P 0.05), and there was no significant difference among the three groups (P 0.05). Compared with CON group, the degradation rate of DM,OM,CP and NDF in rumen of LO group was decreased, but the degradation rate of DM,OM,CP and NDF in rumen of LOM and LOMS group was increased to a certain extent. According to the above results, the addition of flax oil and malic acid alone or at the same time was beneficial to the increase of fatty acid content in rumen juice of Yanbian yellow cattle. The addition of flax oil alone could reduce the degradation rate of dietary nutrients in rumen, while the addition of flax oil and malic acid could increase the degradation rate of dietary nutrients in rumen to a certain extent.
【作者单位】：延边大学农学院;
【基金】：吉林省科技发展计划项目 “双十工程”重大科技攻关项目
【分类号】：S823.5

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