摘要
本试验旨在研究不同过瘤胃胆碱(RPC)添加量对围产期奶牛泌乳性能及部分血液生化指标的影响。依据年龄、胎次、体重、预产期及上一胎次泌乳量相近原则,选取36头健康围产期荷斯坦牛,随机分为3组,每组12头,对照组饲喂基础日粮,试验Ⅰ组和试验Ⅱ组在基础日粮上分别添加RPC 20g/(头·d)和40g/(头·d)。RPC饲喂期为预产期前3周至产后3周,此后继续监测相应生产指标至产后12周。结果表明,日粮中添加RPC可显著提高围产期奶牛平均产量奶,还可显著降低血液中的NEFA和BHBA浓度,改善奶牛围产期能量负平衡。本试验条件下,该牧场的RPC最佳添加量为20g/(头·d)。
The experiment was aimed to study the dietary supplemental effects of rumen-protected choline(RPC)on lactation performance,blood biochemical parameters in transition cows.Thirty-six healthy cows in transition period were selected.According to age,calving time,similar parity and last milk yield,the experimental animals were randomly divided into 3 groups:control group,treatment group I,treatment group II,and each group included 12 cows.The cows in control group were fed with basal total mixed ration.The cows in group I and group II were fed with the basal ration added by 20g/d and 40g/d RPC,respectively.The experiment started from 21 days before parturition and ended 21 days after parturition.The results showed that the addition of RPC in transition period can improve production performance of postpartum cows.Meanwhile,it had a favorable effect on blood biochemical parameters.This experiment found the appropriate amount of rumen-protected choline was 20g/d.
作者
史杰
SHI Jie(Xinxiang Municipal Product Quality Monitoring and Inspection Center,Xinxiang 453003)
出处
《中国奶牛》
2018年第9期14-18,共5页
China Dairy Cattle
关键词
过瘤胃胆碱
围产期奶牛
泌乳性能
血液生化指标
Rumen-protected choline
Transition dairy cows
Lactation performance
Blood biochemical parameters
