畜牧兽医学报 ›› 2014, Vol. 45 ›› Issue (9): 1549-1554.doi: 10.11843/j.issn.0366-6964.2014.09.024

• 研究简报 • 上一篇    下一篇

300~350 kg中国荷斯坦育成牛能量代谢规律的研究

高艳霞1,2,3,于志1,曹玉凤1,2,3,李秋凤1,2,3,李建国1,2,3*   

  1. (1.河北农业大学动物科技学院,保定 071001; 2.河北省牛羊胚胎工程技术研究中心,保定 071001;3.河北农业大学养牛科学研究所,保定 071001)
  • 收稿日期:2014-01-20 出版日期:2014-09-23 发布日期:2014-09-23
  • 通讯作者: 李建国,博士生导师,E-mail:jgliauh@sohu.com
  • 作者简介:高艳霞(1977-),女,河北藁城人,副研究员,主要从事反刍动物营养与饲料科学研究,E-mail:yxgaohebau@126.com
  • 基金资助:

    现代农业产业技术体系建设专项资金(CARS-37);农业公益性行业专项(200903006)

Study on Energy Metabolic Rule of Chinese Holstein Heifer with 300-350 kg BW

GAO Yan-xia1,2,3,YU Zhi1,CAO Yu-feng1,2,3,LI Qiu-feng1,2,3,LI Jian-guo1,2,3*   

  1. (1.College of Animal Science and Technology,Agricultural University of Hebei,Baoding 071001,China;2.Research Center of Embryo Engineering Technology in Cattle and Sheep of Hebei,Baoding 071001,China;3.Cattle Science Institute,Agricultural University of Hebei,Baoding 071001,China)
  • Received:2014-01-20 Online:2014-09-23 Published:2014-09-23

摘要:

本试验旨在研究日粮营养水平对300~350 kg体重中国荷斯坦育成牛生长性能和能量代谢规律的影响,初步确定其能量需要量。试验选择21头健康、体重相近((307.67±2.99)kg)的10月龄左右育成牛,随机分为3组(A、B、C),分别饲喂由精料、玉米青贮和羊草组成的精粗比一致,营养水平不同的日粮,其中A组日粮消化能、粗蛋白水平分别为10.98 MJ•kg-1和10.06%,B组分别为11.43 MJ•kg-1和11.04%,C组分别为11.90 MJ•kg-1 和12.04%(DM基础)。结果,3组试验牛平均日增重分别为620.09、820.30和887.30 g•d-1。日粮总能的平均表观消化率、代谢率分别为67.86%和57.94%;对日粮消化能的平均代谢率为85.35%。300~350 kg育成牛消化能(DER)、代谢能(MER)需要量的模型:DER(MJ•d-1)=0.730 14 W0.75+44.38△W,MER(MJ•d-1)=0.616 90 W0.75+39.50△W,W为育成牛体重(kg),△W为日增重(kg•d-1)。

关键词: 育成牛, 能量, 需要量, 模型

Abstract:

The objective of this study was to evaluate the effect of nutritional level of ration on the growth performance of Chinese Holstein heifer with body weight of 300-350 kg,to reveal metabolic rule of energy requirement.Twenty-one 10-month-old heifers ((307.67±2.99)kg of BW) were divided into 3 groups(A,B and C) in a randomized experiment design,each group was fed different diet consisted of concentrate,corn silage and Leymus chinensis.The DE and CP of group A,B and C were 10.98 MJ•kg-1 and 10.06%,11.43 MJ•kg-1 and 11.04%,11.90 MJ•kg-1 and 12.04%(DM basis),respectively.The ADG of heifers in 3 groups reached 620.09,820.30 and 887.30 g•d-1,respectively.The apparent and metabolic digestibility of gross energy(GE) were 67.86% and 57.94%,respectively.Average digestibility for DE was 85.35%.The study showed models of DER and MER requirement of heifers were:DER(MJ•d-1)=0.730 14W0.75+44.38△W,MER(MJ•d-1)=0.616 90 W0.75+39.50△W,W is BW of heifers(kg),△W is ADG(kg•d-1).

Key words: heifer, energy, requirements, model

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