日粮添加过瘤胃脂肪对母牛血清激素、养分表观消化率及繁殖性能的影响  

Effect of dietary supplementation with rumen fat on serum hormone, nutrient digestibility and reproductive performance of cows

作　　者：李彬 郎侠[2] 孔伟 LI Bin;LANG Xia;KONG Wei

机构地区：[1]甘肃省畜牧技术推广总站,甘肃兰州730030 [2]甘肃省农业科学院,甘肃兰州730070 [3]甘肃省家畜繁育改良管理站,甘肃武威733000

出　　处：《饲料研究》2023年第1期16-19,共4页Feed Research

基　　金：甘肃省农业科技项目(项目编号:GN KJ-2022-16)。

摘　　要：试验旨在研究不同水平的过瘤胃脂肪对安格斯母牛血清激素、养分表观消化率及繁殖性能的影响。选择40头安格斯母牛随机为4组,每组10个重复,每个重复1头牛。对照组母牛饲喂基础日粮,试验1组母牛饲喂基础日粮+100 g/(头·d)的过瘤胃脂肪,试验2组母牛饲喂基础日粮+200 g/(头·d)的过瘤胃脂肪,试验3组母牛饲喂基础日粮+300 g/(头·d)的过瘤胃脂肪。试验期60 d。结果显示:与对照组相比,试验2组和试验3组母牛血清胰岛素和牛胰岛素样生长因子结合蛋白-4、促卵泡素、黄体酮、雌二醇含量显著升高(P<0.05)。与对照组相比,试验2组、试验3组母牛对粗蛋白和中性洗涤纤维的表观消化率显著升高(P<0.05),各试验组母牛对粗脂肪的表观消化率均显著升高(P<0.05)。与对照组相比,试验2组和试验3组母牛产后第一次发情时间显著降低(P<0.05);各试验组母牛的第一次配种天数均显著降低(P<0.05),妊娠率显著升高(P<0.05)。研究表明,母牛生产中使用200 g/(头·d)和400 g/(头·d)的过瘤胃脂肪可以促进机体对营养物质的消化吸收,提高繁殖性能。The experiment was conducted to study the effect of different levels of rumen bypass fat on serum hormone,apparent digestibility of nutrients and reproductive performance of Angus cows. A total of 40 Angus cows were randomly divided into four groups, with ten replicates in each group and one cow in each replicate. The cows in control group were fed with basic diet, the cows in group 1 were fed with basic diet + 100 g/(head·d) of rumen bypass fat, the cows in group 2were fed with basic diet + 200 g/(head·d) of rumen bypass fat, and the cows in group 3 were fed with basic diet +300 g/(head·d) of rumen bypass fat. The test period was 60 d. The results showed that compared with control group, the content of serum insulin, bovine insulin-like growth factor binding protein-4, follicle stimulating hormone, progesterone and estradiol of cows in group 2 and group 3 were significantly increased(P<0.05). Compared with control group, the crude protein and neutral detergent fiber apparent digestibility of cows in group 2 and group 3 were significantly increased(P<0.05), and the crude fat apparent digestibility of cows in each test group was significantly increased(P<0.05).Compared with control group, the first oestrus time of cows in group 2 and group 3 was significantly decreased(P<0.05),the first mating days of cows in each test group were significantly reduced(P<0.05), and the pregnancy rate was significantly increased(P<0.05). The study indicates that the use of 200 g/(head·d) and 400 g/(head·d) rumen bypass fat in cow production can promote the digestion and absorption of nutrients, improve reproductive performance.

关 键 词：过瘤胃脂肪 安格斯母牛 血清激素 养分表观消化率 繁殖性能 

分 类 号：S823[农业科学—畜牧学]