反刍动物营养 Ruminant Nutrition

早期断奶时间对湖羊羔羊组织器官发育、屠宰性能和肉品质的影响

  • 柴建民 ,
  • 刁其玉 ,
  • 屠焰 ,
  • 王海超 ,
  • 张乃锋
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  • 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

收稿日期: 2014-02-20

  网络出版日期: 2014-07-01

基金资助

公益性行业(农业)科研专项“南方地区幼龄草食畜禽饲养技术研究”(201303143-01)

Effects of Early Weaning Time on Tissue and Organ Development, Slaughter Performance and Meat Quality of Hu Lambs

  • CHAI Jianmin ,
  • DIAO Qiyu ,
  • TU Yan ,
  • WANG Haichao ,
  • ZHANG Naifeng
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  • Key Laboratory of Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China

Received date: 2014-02-20

  Online published: 2014-07-01

摘要

本试验旨在研究不同早期断奶时间对湖羊羔羊屠宰性能、组织器官发育和肉品质的影响,以确定早期断奶的最佳时间。采用单因素试验设计,选取初生重为(2.5±0.2) kg的新生湖羊羔羊48只,随机分为4组,每组3个重复,每个重复4只。ER组(对照组)随母哺乳至60日龄;EW10、EW20、EW30组分别于10、20、30日龄断母乳,饲喂代乳品至60日龄。61~90日龄,各组羔羊均饲喂开食料育肥。90日龄每组随机选取4只屠宰,测定其组织器官重量、屠宰性能和肉品质。结果表明:试验组湖羊羔羊90日龄体重、净增重、平均日增重均显著高于ER组(P0.05);部分屠宰指标(宰前活重、胴体重和空体重)与上述生长性能指标有相同的变化规律,但屠宰率、眼肌面积和GR值组间无显著差异(P>0.05);试验组羔羊蹄重量显著高于ER组(P0.05);EW30组肾脏重量显著低于其他组(P0.05),其余组织器官重量各组间差异不显著(P>0.05);试验组瘤胃重量显著高于ER组(P0.05);眼肌滴水损失率、失水率和臀肌肉色亮度、红度、黄度值各组间均无显著差异(P>0.05),但试验组眼肌肉色亮度、黄度值均显著高于ER组(P0.05)。由此可见,早期断奶能够促进湖羊羔羊生长发育,特别是在生长后期,在10日龄进行早期断奶最有利于湖羊羔羊生长、组织器官发育和产肉。

本文引用格式

柴建民 , 刁其玉 , 屠焰 , 王海超 , 张乃锋 . 早期断奶时间对湖羊羔羊组织器官发育、屠宰性能和肉品质的影响[J]. 动物营养学报, 2014 , 26(7) : 1838 -1847 . DOI: 10.3969/j.issn.1006-267x.2014.07.016

Abstract

In order to find the best early weaning time, the effects of early weaning time on tissue and organ development, slaughter performance and meat quality of Hu lambs were investigated in this experiment. Forty-eight new born Hu lambs with born weight of (2.5±0.2) kg were randomly divided into four groups with three replicates in each group and four lambs per replicate. Lambs in ER group (control group) were ewe reared to 60 days of age; lambs in EW10, EW20 and EW30 groups were weaned at 10, 20 and 30 days of ages, respectively, and were fed milk replacer to 60 days of age. All lambs were fed starter for fattening from 61 to 90 days of age. Four lambs in each group were slaughtered to determine tissue and organ weight, slaughter performance and meat quality at 90 days of age. The results showed as follows: body weight at 90 days of age, net gain and average daily gain in test groups were significantly higher than those in ER group (P0.05); partial slaughter indexes (live weight before slaughter, carcass weight and empty body weight) showed the same tendency as the above growth performance indices, while no significant differences were found in dressing percentage, eye muscle area and GR value among all the groups (P>0.05); lambs in test groups had significantly higher feet weight than ER group (P0.05); kidney weight in EW30 group was significantly lower than that in the rest three groups (P0.05), and no significant differences were found in the weight of the rest organs and tissues (P>0.05); rumen weight in test groups was significantly higher than that in ER group (P0.05); the eye muscle color's L* and b* values in test groups were significantly higher than those in ER group (P<0.05), while a* value, water losing rate and drip loss of eye muscle, and gluteus color's L*, a* and b* values were not significantly different among all the groups (P<0.05). It is concluded that early weaning is advantageous to upper growth and development of Hu lambs, especially at late growing stage, and 10 days of age is the best weaning time of Hu lambs for growth, organ and tissue development and meat production.

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