动物营养学报 >

2013 , Vol. 25 >Issue 9: 2021 - 2027

DOI: https://doi.org/10.3969/j.issn.1006-267x.2013.09.014

反刍动物营养 Ruminant Nutrition

精料补充料能量水平对早期断奶犊牦牛生产性能和营养物质表观消化率的影响

  • 杨俊 ,
  • 王之盛 ,
  • 保善科 ,
  • 王威 ,
  • 薛白 ,
  • 张海波 ,
  • 邹华围
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  • 1. 四川农业大学动物营养研究所, 教育部动物抗病营养重点实验室, 雅安 625014;
    2. 青海省海北州畜牧兽医研究所, 海北 810299

收稿日期: 2013-03-01

  网络出版日期: 2013-08-18

基金资助

现代农业(肉牛牦牛)产业技术体系专项资金资助(CARS-38);青藏高原社区畜牧业行业科技项目(201203008)

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Effects of Energy Level of Concentrate Supplement on Performance and Nutrient Apparent Digestibility of Early-Weaner Yak Calves

  • YANG Jun ,
  • WANG Zhisheng ,
  • BAO Shanke ,
  • WANG Wei ,
  • XUE Bai ,
  • ZHANG Haibo ,
  • ZOU Huawei
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  • 1. Institute of Animal Nutrition, Sichuan Agricultural University, Key laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Ya'an 625014, China;
    2. Animal Husbandry and Veterinary Institute of Haibei State in Qinghai Province, Haibei 810299, China

Received date: 2013-03-01

  Online published: 2013-08-18

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摘要

本试验旨在研究精料补充料能量水平对早期断奶犊牦牛生产性能、血清生化指标和营养物质表观消化率的影响。选取体况良好、平均体重为(56.27±4.70) kg的3月龄犊牦牛18头,随机分为3组,每组3个重复,每个重复2头牛。饲喂粗蛋白质水平为17.00%,增重净能分别为5.60、6.50、7.40 MJ/kg的3种精料补充料。试验共39 d,其中预试期7 d,饲养试验28 d,消化试验4 d。结果表明:1)6.50、7.40 MJ/kg组犊牦牛平均日增重显著高于5.60 MJ/kg组(P<0.05);5.60 MJ/kg组精料补充料/增重显著高于其他2组(P<0.05)。2)6.50 MJ/kg组犊牦牛血清葡萄糖、甘油三酯含量显著高于5.60 MJ/kg组(P<0.05),与7.40 MJ/kg组差异不显著(P>0.05)。3)6.50 MJ/kg组犊牦牛干物质、有机物、总能表观消化率显著高于5.60 MJ/kg组(P<0.05)。随能量水平升高,钙(P=0.06)、磷(P=0.10)表观消化率有降低的趋势。综上所述,牦牛可在3月龄断奶舍饲饲养,精料补充料增重净能为6.50 MJ/kg时,更有利于舍饲的3月龄断奶犊牦牛的营养物质消化,促进生长。

关键词： 能量水平; 犊牦牛; 生产性能; 血清生化指标; 表观消化率

本文引用格式

杨俊 , 王之盛 , 保善科 , 王威 , 薛白 , 张海波 , 邹华围 . 精料补充料能量水平对早期断奶犊牦牛生产性能和营养物质表观消化率的影响[J]. 动物营养学报, 2013 , 25(9) : 2021 -2027 . DOI: 10.3969/j.issn.1006-267x.2013.09.014

Abstract

This experiment was conducted to investigate the effects of energy level of concentrate supplement on performance, serum biochemical parameters and nutrient apparent digestibility of early-weaner yak calves. Eighteen healthy 3-month-old yak calves with an average body weight of (56.27?4.70) kg were randomlves allocated to 3 groups with 3 replicates per group and 2 calves per replicate. Calves were fed concentrate supplements with the same crude protein content (17.00%) and different net energy for gain (NEg) levels (5.60, 6.50 and 7.40 MJ/kg, respectively) for 39 days (7-day pretrial period, 28-day feeding trial and 4-day digestion trial). The results showed as follows: 1) the average daily gain of yak calves in 6.50 and 7.40 MJ/kg groups was significantly higher than that in 5.60 MJ/kg group (P<0.05); the concentrate supplement/gain of yak calves in 5.60 MJ/kg group was significantly higher than that in 6.50 and 7.40 MJ/kg groups (P<0.05). 2) The contents of serum glucose and triglyceride in 6.50 MJ/kg group were significantly higher than those in 5.60 MJ/kg group (P<0.05), but were not significantly different from those in 7.40 MJ/kg group (P>0.05). 3) Dry matter, organic matter and gross energy apparent digestibility in 6.50 MJ/kg group were significantly higher than those in 5.60 MJ/kg group (P<0.05); calcium (P=0.06) and phosphorus apparent digestibility (P=0.10) tended to be decreased with the increase of energy level. Overall, yak calves can be weaned at 3 months of age when the NEg of concentrate supplement is 6.50 MJ/kg, which is beneficial for nutrient digestion and body growth.

Key words： energy level; yak calf; performance; serum biochemical parameter; apparent digestibility

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