动物营养学报Issue(3)：675-682,8.DOI:10.3969/j.issn.1006-267x.2014.03.017
过瘤胃胆碱对围产期奶牛生产性能及脂肪代谢的影响
Effects of Rumen-Protected Choline on Performance and Fat Metabolism of Periparturient Dairy Cows
摘要
Abstract
The aim of this study was to investigate the effects of rumen-protected choline ( RPC) on perform-ance and fat metabolism of periparturient dairy cows. Sixty Holstein cows with similar parity, age, milk yield of the last parity and expected parturition date were randomly assigned to three groups with twenty cows in each group. Cows in different groups were fed a basal diet supplemented with 0, 20 and 30 g/d RPC, respectively. The experiment lasted for 74 days, which was from 14 days before parturition to 60 days after parturition. The results showed as follows: 1 ) dietary supplementation of RPC at 20 and 30 g/d significantly increased milk yield of cows at 45 and 60 days after parturition ( P<0 . 05 or P<0 . 01 ); dietary supplementation of RPC at 30 g/d significantly increased the percentages of milk fat, milk protein, lactose and milk total solids at some time points after parturition ( P<0 . 05 or P <0 . 01 ) . 2 ) Dietary supplementation of RPC at 20 and 30 g/d significantly increased the concentrations of glucose, low density lipoprotein, triglyceride and total amino acids in plasma (P<0. 05 or P<0. 01), but significantly decreased the concentrations of non-esterified fatty acid,β-hydroxybutyrate and total cholesterol in plasma of cows at some time points after parturition ( P <0 . 05 or P<0 . 01 ) . 3 ) Dietary supplementation of RPC at 20 and 30 g/d significantly increased plasma insulin concen-tration ( P<0 . 05 or P<0 . 01 ) , but significantly decreased the concentrations of glucagon and leptin in plasma of cows at some time points after parturition (P<0. 05 or P<0. 01). In conclusion, dietary supplementation of RPC can alleviate negative energy balance, regulate fat metabolism, improve the performance of periparturi-ent dairy cows, and the optimal supplemental level of RPC for periparturient dairy cows is 30 g/d.关键词
围产期奶牛/过瘤胃胆碱/生产性能/脂肪代谢Key words
periparturient dairy cow/rumen-protected choline/performance/fat metabolism分类
农业科技引用本文复制引用
刘翔,曲永利,刘立成,王洋,陶春卫..过瘤胃胆碱对围产期奶牛生产性能及脂肪代谢的影响[J].动物营养学报,2014,(3):675-682,8.基金项目
国家科技部支撑项目---东北农区奶牛规模化健康养殖生产技术集成和产业化示范(2012BAD12B05-01) （2012BAD12B05-01）
黑龙江农垦总局项目---黑龙江垦区高产奶牛科学饲养与后备牛培育技术研究(HNK11A-08-01-02) （HNK11A-08-01-02）
