Establishment of Prediction Model of Metabolizable Energy of Concentrate for Mutton Sheep by Substitution Method

ZHAO Jiangbo; WEI Shilai; MA Tao; XIAO Yi; DING Jingmei; LI Lanjie; FENG Wenxiao; JIA Peng; ZHAO Mingming; DIAO Qiyu

doi:10.3969/j.issn.1006-267x.2016.04.033

Chinese Journal of Animal Nutrition >

2016 , Vol. 28 >Issue 4: 1217 - 1224

DOI: https://doi.org/10.3969/j.issn.1006-267x.2016.04.033

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Establishment of Prediction Model of Metabolizable Energy of Concentrate for Mutton Sheep by Substitution Method

ZHAO Jiangbo ,
WEI Shilai ,
MA Tao ,
XIAO Yi ,
DING Jingmei ,
LI Lanjie ,
FENG Wenxiao ,
JIA Peng ,
ZHAO Mingming ,
DIAO Qiyu

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1. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China;
2. Feed Research Institute, Chinese Academy of Agricultural Sciences, Key Laboratory of Feed Biotechnology of Ministry of Agriculture, Beijing 100081, China

Received date: 2015-11-03

Online published: 2016-04-11

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Abstract

This experiment was conducted to establish prediction model of metabolizable energy of concentrate for mutton sheep by substitution method. Sixty-six castrated Dorper×thin-tailed Han F₁ rams [(49.6±1.3) kg)] were randomly assigned into 11 groups(1 basal diet group and 10 experimental diet groups) with 6 rams per group. Digestion and metabolism trial(8 days) and respirometry trial(3 days) combined with substitution method were conducted to measure digestible energy and metabolizable energy of 10 concentrates, and to establish the models between metabolizable energy and proximate nutrients or digestible nutrients. The results showed as follows, 1) gross energy(P<0.05), acid detergent fiber content(P<0.05), and organic matter content(P<0.01) had significant correlations with digestible energy; the proximate nutrients had no correlation with ME(P>0.05). 2) Digestible nutrients had significant correlations with metabolizable energy(P<0.01), and the equations as follows:ME=-1.907+1.344DE+1.321DDM-5.347DOM-2.093DADF(R²=0.845, n=60, P<0.01); ME=-2.105+1.349DE-6.577DOM(R²=0.842, n=60, P<0.01). [ME was metabolizable energy(MJ/kg), DE was digestible energy(MJ/kg), DDM was digestible dry matter(%), DOM was digestible organic matter(%), and DADF was digestible acid detergent fiber(%).] In conclusion, it is unsuitable to predict metabolizable energy using the proximate nutrients, while it is accurate to predict metabolizable energy using digestible nutrients of concentrate.

Key words： mutton sheep; concentrate; digestible energy; metabolizable energy; digestible nutrients; prediction model

Cite this article

ZHAO Jiangbo , WEI Shilai , MA Tao , XIAO Yi , DING Jingmei , LI Lanjie , FENG Wenxiao , JIA Peng , ZHAO Mingming , DIAO Qiyu . Establishment of Prediction Model of Metabolizable Energy of Concentrate for Mutton Sheep by Substitution Method[J]. Chinese Journal of Animal Nutrition, 2016 , 28(4) : 1217 -1224 . DOI: 10.3969/j.issn.1006-267x.2016.04.033

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