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作 者:王韵斐[1] 王文义[1] 陈秋菊[1] 马涛[2] 柴建民[2] 杨东 邬晓娟 王文军[1] 彭龙[1] 汤化军[1] 刁其玉[2]
机构地区:[1]内蒙古巴彦淖尔市农牧业科学研究院,内蒙古巴彦淖尔015000 [2]中国农业科学院饲料研究所,农业部饲料生物技术重点实验室,北京100081 [3]内蒙古河套农牧业技术研究院,内蒙古巴彦淖尔015000
出 处:《中国畜牧杂志》2016年第15期62-66,共5页Chinese Journal of Animal Science
摘 要:本研究旨在探索北方半农半牧区羔羊最佳断母乳时间,为直线育肥技术应用提供基础。选用60只出生时间和出生体重相近(8.86±1.71 kg)的蒙寒杂交(蒙古羊♂×小尾寒羊♀)羔羊,随机分为4组,对照组羔羊随母哺乳至75 d,试验组羔羊分别在14、21和28日龄时断奶(EW14组、EW21组、EW28组),随后饲喂羔羊专用代乳粉到75 d。所有羔羊于75 d后直接进入育肥阶段,直到6.5月龄出栏。结果表明:EW14组羔羊日增重比ER组高19.59%(P<0.05);公羔日增重显著高于母羔(P<0.05);各组试验羔羊宰前活重、胴体重、屠宰率、眼肌面积、GR值、肉p H值、失水率和熟肉率的各项数据之间差异均不显著(P>0.05)。经济效益分析表明,EW14组比ER组高86.71元/只。结果显示,蒙寒杂交羔羊于14日龄断母乳并进入直线育肥阶段,能够加快育肥速度,缩短出栏时间,提高经济效益。This study aimed to explore the best weaning age of lamb in the northern pastoral region and to provide the reference for linear fattening of sheep. Sixty Mongolian and small-tailed Han crossbreed lambs with similar age and birth weight (8.86±1.71) kg were randomly divided into 4 groups. The control group was fed by the dams to 75 d. The lambs of other three groups were weaned at 14, 21 and 28 days of age (EWI4 group, EW21 group, EW28 group) and fed milk replacer to 75 d. After 75 d, all the lambs directly entered the fattening stage. The results showed that the average daily gain of EW14 group was 19.59% higher than that of the ER group. The analysis of economic benefit showed that the net profit of lambs in EW14 was RMB 86.71 Yuan higher than that of control group (P〈0.05). In conclusion, Mongolian and small-tailed Han crossbred lambs weaned at 14 d have improved fattening efficiency, slaughter performance, and economic benefits.
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