日粮甜菜碱和过瘤胃脂肪对育肥湖羊生长性能和消化参数的影响

发布时间：2018-04-19 08:26

本文选题：甜菜碱 + 过瘤胃脂肪　；参考：《草业科学》2016年12期

【摘要】：选取48只3月龄湖羊公羔,随机分为6个处理组、每个处理组8个重复,每个重复1只羊,试验过渡期10d、预试期7d、试验期50d。采用2×3双因素试验,即两个RPF添加浓度(0和2.4%),3个Bet水平(0、4和8g·d-1)。旨在研究添加甜菜碱(betaine,Bet)和过瘤胃脂肪(rumen protected fat,RPF)对育肥湖羊生长性能、血液参数和瘤胃发酵参数的影响。结果表明,1)添加2.4%的RPF能显著降低湖羊日增重、采食量和末体重(P0.05),显著提高血浆中胆固醇(TCH)和甘油三酯(TG)含量(P0.05),对血浆中的葡萄糖(Glu)含量无显著影响(P0.05);日粮添加Bet对育肥湖羊生长性能和血液指标无显著影响(P0.05)。二者交互对育肥湖羊生长性能和血液指标无显著作用(P0.05)。2)添加2.4%的RPF能显著降低饲料中中性洗涤纤维(NDF)和酸性洗涤纤维(ADF)消化率(P0.05),对干物质(DM)、有机物(OM)和粗蛋白(CP)消化率无显著影响(P0.05),对瘤胃挥发性脂肪酸浓度及比例无显著影响(P0.05);日粮添加Bet对养分消化率和瘤胃挥发性脂肪酸浓度及比例无显著影响(P0.05)。二者互作对瘤胃发酵和养分消化率无显著影响(P0.05)。综上可知,在本研究条件下,甜菜碱对湖羊无调控作用,RPF主要通过降低湖羊采食量及纤维消化率影响生产性能。实际生产中,若以羊肉产量为目标不宜添加2.4%RPF。
[Abstract]:48 3-month-old Hu male lambs were randomly divided into 6 treatment groups with 8 replicates in each treatment group and 1 sheep in each replica. The transition period was 10 days, the pretest period was 7 days, and the trial period was 50 days.A 2 脳 3 double factor test was used, that is, two RPF concentrations of 0 and 2.4, three Bet levels of 0 and 8 g d ~ (-1).The purpose of this study was to study the effects of betaine betaine (betaine) and rumen protected fat (RPF) on growth performance, blood parameters and rumen fermentation parameters of fattening Hu sheep.The results showed that the addition of 2.4% RPF could significantly reduce the daily gain of Hu sheep.Feed intake and end weight (P0.05N) significantly increased the contents of cholesterol and triglyceride (TGG) in plasma, but had no significant effect on the content of Glug in plasma, while dietary supplementation of Bet had no significant effect on growth performance and blood index of fattening Huhu sheep.There was no significant effect on growth performance and blood index of fattening Hu sheep. (P0.05 路2) addition of 2.4% RPF could significantly reduce the digestibility of neutral detergent fiber (NDF) and acid detergent fiber (ADF) in feed (P0.05), and the dry matter (DMN), organic matter (OMN) and crude protein (CPP).The digestibility had no significant effect on the digestibility and the concentration and proportion of volatile fatty acids in rumen, while dietary Bet had no significant effect on the digestibility of nutrients and the concentration and proportion of volatile fatty acids in rumen.There was no significant effect on rumen fermentation and nutrient digestibility.In conclusion, under the condition of this study, the effect of betaine on the production performance of Hu sheep was mainly affected by reducing the feed intake and fiber digestibility.In actual production, 2.4 RPFs should not be added if the mutton yield is taken as the target.
【作者单位】：草地农业生态系统国家重点实验室兰州大学草地农业科技学院;甘肃农业大学动物科学技术学院;甘肃省肉羊繁育生物技术工程实验室;
【基金】：现代农业产业技术体系建设专项(CARS-39) 兰州大学中央高校基本科研业务费专项资金(lzujbky-2015-43)
【分类号】：S826.5

【相似文献】