畜牧兽医学报 ›› 2014, Vol. 45 ›› Issue (8): 1295-1301.doi: 10.11843/j.issn.0366-6964.2014.08.013

• 动物营养 • 上一篇    下一篇

300~350 kg中国荷斯坦育成牛蛋白质代谢规律研究

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:2014-08-23 发布日期:2014-08-22
  • 通讯作者: 李建国,教授,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;于志(1989-),男,河北赵县人,硕士生,主要从事动物营养与饲料科学研究,E-mail:yuzhia@126.com 。二者为并列第一作者
  • 基金资助:

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

Study on Dietary Protein Metabolic Rule of Chinese Holstein Heifer during 300-350 kg Body Weight

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:2014-08-23 Published:2014-08-22

摘要:

旨在研究日粮营养水平对于300~350 kg体重中国荷斯坦育成牛蛋白质代谢规律的影响,确定此阶段育成牛适宜的日粮蛋白质需要量模型。试验选择21头年龄(10月龄左右)、体重相近((307.67±2.99)kg)、健康的育成奶牛,随机分为A、B、C 3组,分别饲喂精粗比一致,但不同营养水平的日粮,各组日粮消化能、粗蛋白水平分别为10.98 MJ•kg-1和10.06%, 11.43 MJ•kg-1和11.04%, 11.90 MJ•kg-1 和12.04%(DM基础)。3组试验牛平均日增重为620.09、820.30和887.30 g•d-1;此阶段育成牛对日粮DM、OM、NDF和ADF平均消化率分别为70.70%、72.51%、68.70%和68.29%;日粮粗蛋白的平均消化率和平均沉积率分别为69.77%和41.37%。研究表明,300~350 kg育成奶牛日粮粗蛋白(CP)、可消化粗蛋白(RDCP)、瘤胃降解蛋白(RDP)和小肠可消化蛋白(IDCP)需要量的模型:CP(g•d-1)=5.62W0.75 +595.31△W;RDCP(g•d-1)=3.90W0.75 +418.04△W;RDP(g•d-1)=2.50 W0.75+266.19△W;IDCP(g•d-1)=3.60 W0.75+384.94△W (W为育成牛体重,kg;△W为日增重,kg•d-1)。

关键词: 育成牛, 日粮, 蛋白, 需要量

Abstract:

The experiment was conducted to study the metabolic rule of the dietary protein of Chinese Holstein heifer with 300-350 kg body weight,and quantify the dietary protein requirement of heifers at this stage.Twenty one 10-month-old healthy heifers with similar initial body weight ((307.67±2.99)kg) were divided into 3 groups (A,B and C) in a randomized experiment design.The heifers in group A,B and C were fed diets with the same ratio of concentrate to forage and different nutritional levels (DM basis).The DE and crude protein content of experimental diet 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% (dry matter basis),respectively.The ADG of heifers in experiment groups were 620.09,820.30 and 887.30 g•d-1,respectively.The average apparent digestibility of dietary DM,OM,NDF and ADF were 70.70%,72.51%,68.70% and 68.29% for heifer at this stage.The digestibility and deposition rate of dietary CP were 69.77% and 41.37%.The estimated requirement model of crude protein (CP),digestible crude protein (RDCP),rumen degraded protein (RDP) and the small intestine digestible protein (IDCP) of heifers were:CP(g•d-1)=5.62W0.75+595.31△W;RDCP(g•d-1)=3.90W0.75+418.04△W;RDP(g•d-1)=2.50 W0.75+266.19△W;IDCP(g•d-1)=3.60 W0.75+384.94△W(W was BW of heifers,kg;△W was ADG,kg•d-1).

Key words: heifer, diet, protein, requirements

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