过瘤胃胆碱对泌乳奶牛血液脂质代谢和抗氧化应激的影响  

Blood Lipid Profiles and Anti-oxidative Stress for Lactating Cows Fed Rumen-protected Choline

作　　者：吴文旋[1] 

机构地区：[1]贵州大学动物科学学院,贵阳550025

出　　处：《中国农学通报》2012年第2期39-42,共4页Chinese Agricultural Science Bulletin

基　　金：国家自然科学基金"日粮阴阳离子差与钙结合蛋白表达含量关联性及其预防奶牛产乳热的效果研究"(30901038);动物营养学国家重点实验室开放课题"日粮DCAD水平调控鼠CaBP-D9k表达:预防奶牛产乳热的后续研究"(2004DA125184F1115);贵州省农业科技攻关项目"贵州主产优势牧草瘤胃内环境生理指标参数构建与高效加工利用技术集成与示范"(黔科合NY字[2009]3085);贵州省科学技术基金"日粮阴阳离子差对奶牛代谢和瘤胃发酵影响的研究"(黔科合J字[2008]2258);贵州大学引进人才科研项目"DCAD对围产期奶牛代谢和生产性能影响的研究"([2007]002)

摘　　要：试验旨在研究过瘤胃胆碱(RPC)对泌乳奶牛血液脂质代谢和抗氧化应激的影响。选用10头泌乳盛期奶牛为试验动物,采用自身对照试验设计,试验时间分为对照期、试验1期、试验2期共36天,每期12天。RPC的添加水平为每头40g/天。每期采集血液制备血浆,测定其脂质代谢和抗氧化应激指标。结果表明,与对照期相比,日粮添加RPC对血浆肌酐、甘油三脂影响不大,差异不显著(P>0.05);可降低血浆尿素氮水平(P<0.05),增加血浆总胆固醇水平(P<0.05)。血浆总抗氧化能力、超氧化物歧化酶、丙二醛、谷胱甘肽-过氧化物酶水平均不受RPC的影响(P>0.05)。综上所述,RPC有利于改善泌乳盛期奶牛脂质代谢和蛋白质利用效率,而对抗氧化应激影响不大。This study was conducted to evaluate the blood lipid profiles and anti-oxidative stress for lactating cows fed rumen-protected choline （RPC）. Ten cows in early lactation were used as the experimental animal with self-pair design. Trial lasted for 3 durations of 12 days including control, trial 1, and trial 2, respectively. Each cow was supplemented with a daily dose of 40 g RPC. Blood was collected to harvest plasma for measurements of blood lipid profiles and anti-oxidant stress. Feeding of RPC did not affect plasma, creatinine, and triglyceride levels （P〉0.05）. However, plasma urea nitrogen was lower for trial 1 and 2 phases than control （P〈0.05）; and plasma cholesterol in trial 1 and 2 duration was higher relative to control （P〈0.05）. Compared with control, plasma concentrations of total anti-oxidative capacity, superoxide dismutase, malondialdehyde, and glutathione peroxidase was not altered for RPC supplementation （P〉0.05）. These results indicated that, under the present experimental condition, dietary inclusion of RPC was beneficial for protein utilization and blood lipid metabolism, but not for anti-oxidative stress for peak-lactating dairy cows.

关 键 词：过瘤胃胆碱 脂质代谢 抗氧化应激 泌乳奶牛 

分 类 号：S816[农业科学—饲料科学]