中国农业大学学报2012，Vol.17Issue(3)：114-120,7.
过瘤胃胆碱对围产期奶牛生产性能和能量代谢的影响
Effect of rumen protected choline supplemented into diet on performance and energy metabolism of dairy cows in transition period
摘要
Abstract
To ascertain effect of rumen protected choline on performance and energy metabolism of dairy cows in transition period,In this experiment forty tested cows that were divided randomly into four groups（in turn group Ⅰ,Ⅱ,Ⅲ,Ⅳ 10 cows per group） from an intensive dairy farm.according to different dosage of rumen-protected choline（5,10,20,and 0 g dosage of choline,per day for each cow） supplemented into diet from day 14 before calving to day 42 after calving.production performances（MY,and DMI） were investigated,blood biochemical parameters（Glu、BHBA、NEFA、 TG、TCHO） and endocrine parameters（Ins,Gn） were also detected in transition period of tested cows at days 14,7 before calving,parturition and day 7,14,21,28,35 42 after calving.Results indicated that：1） rumen protected choline increased milk yield and dry matter intake of tested cows in transition period,and effect of 10 g dosage of choline is the best.2） compared to control group,concentration of plasma Glu significantly increases and of plasma NEFA,BHBA and TCHO markedly decrease,but of plasma TG do not change in all test groups.3） compared to control group,there is no significant difference in concentration of plasma Ins and Gn in all tested groups.These results suggested that rumen protected choline supplemented into diet may more effectively improve performance and fat metabolism,promote gluconeogenesis in vivo,ease the negative energy balance of dairy cows in transition period and during early lactation stage.关键词
奶牛/过瘤胃胆碱/生产性能/能量代谢Key words
dairy cattle/rumen protected choline/performance/energy metabolism分类
农业科技引用本文复制引用
郑家三,夏成,张洪友,徐闯..过瘤胃胆碱对围产期奶牛生产性能和能量代谢的影响[J].中国农业大学学报,2012,17(3):114-120,7.基金项目
黑龙江省人事厅博士后启动金 （）
国家科技计划项目 （）
黑龙江农垦总局攻关项目 （）
