畜牧兽医学报 ›› 2018, Vol. 49 ›› Issue (2): 327-337.doi: 10.11843/j.issn.0366-6964.2018.02.012

• 营养与饲料 • 上一篇    下一篇

日粮脂肪水平对湖羊双胞胎公羔生长性能及血清指标的影响

李文娟, 陶慧, 张蓉, 张帆, 解彪, 张乃锋, 刁其玉*   

  1. 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:2017-08-14 出版日期:2018-02-23 发布日期:2018-02-10
  • 通讯作者: 刁其玉,研究员,博士生导师,E-mail:diaoqiyu@caas.cn
  • 作者简介:李文娟(1990-),女,回族,河南周口人,硕士生,主要从事动物营养与饲料科学研究,E-mail:liwjuan1226@163.com
  • 基金资助:

    国家肉羊产业技术体系建设专项资金(CARS-38);公益性行业(农业)科研专项经费(201303143)

Effects of Dietary Fat Levels on Growth Performance and Serum Parameters of Early-weaned Male Twin Hu Lambs

LI Wen-juan, TAO Hui, ZHANG Rong, ZHANG Fan, XIE Biao, ZHANG Nai-feng, DIAO Qi-yu*   

  1. Key Laboratory of Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
  • Received:2017-08-14 Online:2018-02-23 Published:2018-02-10

摘要:

旨在研究日粮不同脂肪水平对早期断奶双胞胎湖羊公羔生长发育、体尺指标、断奶前腹泻率及血清指标的影响。选择7日龄体重相近、健康的湖羊双胞胎公羔30对,采用配对试验设计,分为正常脂肪组(NF)和高脂肪组(HF),一对双胞胎随机分到两个组中。7日龄断母乳,NF组开始饲喂脂肪含量为15%的代乳品和2.8%的开食料,HF组开始饲喂脂肪含量27%的代乳品及5.0%的开食料,饲喂至60日龄断液体饲料(代乳品)。60~120日龄统一饲喂开食料(US)。所有羔羊定期晨饲前称重,记录每日采食量及腹泻情况;在60、90及120日龄晨饲前颈静脉采血,用于测定血清学常规指标。结果表明:1)在30、50、90及120日龄时,HF组羔羊体重显著高于NF组(P<0.05),而断代乳品时,HF组羔羊体重有显著高于NF组的趋势(0.05 < P < 0.10)。在7~60日龄阶段,HF组代乳品平均采食量显著高于NF组(P<0.05),但开食料采食量、平均日增重及饲料转化率在两组间差异不显著(P>0.05);在60~90日龄阶段,HF组平均日增重及开食料采食量显著高于NF组(P<0.05),而饲料转化率HF组显著低于NF组(P<0.05);在90~120日龄期间,HF组羔羊采食量显著高于NF组(P<0.05),而饲料转化率有显著高于NF组的趋势(0.05 < P < 0.10)。在整个试验期,HF组总平均采食量显著高于NF组(P<0.05),平均日增重及饲料转化率在两组间差异不显著(P>0.05)。2)试验期内HF组羔羊断奶前腹泻率有显著低于NF组的趋势(0.05 < P < 0.10)。试验期间两组羔羊体尺指标基本上无显著差异(P>0.05)。断奶前饲喂高脂肪日粮可以在一定程度上提高湖羊双胞胎公羔断奶前后的生长性能;高脂肪日粮可以降低断代乳品前腹泻率;且本试验条件下高脂肪日粮对羔羊血液指标的影响在其自身调节的范围内。

关键词: 湖羊, 双胞胎, 脂肪水平, 生长性能, 血清指标

Abstract:

This study aimed to investigate the effects of dietary fat levels on growth, body size, preweaning diarrhea and serum parameters of early-weaned male twin Hu lambs. Thirty pairs of heathy male twin Hu lambs weaned at 7 days of age were selected and randomly allotted to two groups according to the paired design. One group was fed normal fat level (NF) diet with milk replacer (EE:15%) and starter (EE:2.8%), and another group was fed high fat level (HF) diet with milk replacer (EE:27%) and starter (EE:5%). Milk replacer and starter were fed to lambs from weaning to 60 days of age. Then lambs in NF and HF groups were fed unified starter (US) from 60 to 120 days of age. Body weight of all lambs was measured before morning feeding, daily feed intake and diarrhea status were recorded; At 60, 90 and 120 days old, blood samples were collected from jugular vein before morning feeding, and the blood routine indices were determined.The results showed that:1) Body weight of lambs in HF group was significantly higher than that in NF group on 30,50, 90 and 120 days of age (P<0.05). The weaning BW of the lambs in the HF group tended to be higher than that in the NF group (0.05 < P < 0.10). From 7 to 60 days of age, average intake of milk replacer in HF group was significantly higher than that in NF group (P<0.05), but intake of starter, average daily gain and feed conversion ratio were not significant (P>0.05) between the two groups. From 60 to 90 days of age, the ADG and intake of starter of lambs in HF group were significantly higher than that in NF group (P<0.05). Feed conversion ratio of lambs in HF group was significantly lower than that in NF group(P<0.05). From 90 to 120 days of age, intake of starter of lambs in HF group was significantly higher than that in NF group (P<0.05), the feed conversion ratio of the lambs in the HF group tended to be higher than that in the NF group (0.05 < P < 0.10). During the whole experiment period, milk replacer and starter intake of lambs in HF group were significantly higher than that in NF group (P<0.05), but the ADG and feed conversation ratio were not significantly different (P>0.05) between the two groups. 2) The diarrhea rate before weaning in HF group tended to be lower than that in NF group (0.05 < P < 0.10). There was no significant difference in body size indices between the two groups(P>0.05). High fat diet can improve the growth performance of male twin Hu lambs before and after weaning. The high fat diet can reduce the diarrhea rate before weaning, and in the present experimental condition, high fat diet have less effect on serum parameters of male twin Hu lambs, which are all within permissible values by their autoregulation.

Key words: Hu lambs, twins, fat level, growth performance, serum index

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