Energy Metabolic Pattern and Requirements for Growing Dorper Sheep

ZHAO Minmeng; YANG Zaibin; YANG Weiren; JIANG Shuzhen; ZHANG Guiguo; ZHU Wenguang; ZHANG Jilin; GONG Feng

doi:10.3969/j.issn.1006-267x.2013.06.016

Chinese Journal of Animal Nutrition >

2013 , Vol. 25 >Issue 6: 1243 - 1250

DOI: https://doi.org/10.3969/j.issn.1006-267x.2013.06.016

Ruminant Nutrition

Energy Metabolic Pattern and Requirements for Growing Dorper Sheep

ZHAO Minmeng ,
YANG Zaibin ,
YANG Weiren ,
JIANG Shuzhen ,
ZHANG Guiguo ,
ZHU Wenguang ,
ZHANG Jilin ,
GONG Feng

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1. College of Animal Science and Technology, Shandong Agricultural University, Tai'an 271018, China;
2. Shandong Kaiyin Co., Ltd., Dongying 257000, China

Received date: 2013-01-11

Online published: 2013-05-15

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Abstract

A 2×3 factorial experiment design was used to determine the energy metabolic pattern and requirements for growing Dorper sheep. The factors were sex (♂ and ♀) and energy level (low, middle and high). In feeding trial, fifty-four Dorper sheep (27♂+27♀) at 15 days after weaning were randomly allotted to 3 treatments per sex with 3 replicates in each treatment and 3 sheep per replicate. Experimental sheep were fed ad libitum. The experiment lasted for 67 days including a 7-day pre-experimental period and a 60-day experimental period. In metabolic experiment, eighteen (9♂+9♀) Dorper sheep were randomly allotted to 3 treatments per sex with 3 replicate in each treatment and 1 sheep per replicate. The experiment lasted for 14 days including a 7-day-pre-experimental period and 7-day experimental period. The results showed as follows: DE/GE and ME/GE of the ram and ewe sheep were 63.07% and 51.80%, 61.59% and 50.76%, respectively. Formulas of requirements for metabolizable energy of growing Dorper sheep were predicated as follows, ram, ME=31.338ADG+424.728W^0.75, ewe, ME=40.649ADG+406.122W^0.75, Dorper sheep, ME=37.201ADG+399.671W^0.75(ME was metabolizable energy, ADG was average daily gain, and W^0.75 was metabolic weight). In conclusion, the metabolizable energy requirments for maintenance of ram and ewe of growing Dorper sheep are 424.73 and 406.12 kJ/kg W^0.75, respectively, and those for 1 g of daily weight gain are 31.34 and 40.65 kJ, respectively; ram sheep have lower metabolizable energy requirment for growth and higher metabolizable energy for maintenance than ewe sheep; dietary proper digestible energy requirment for growing Dorper sheep is 10.66 MJ/kg (air-dry basis).

Key words： Dorper sheep; growing period; energy; requirement

Cite this article

ZHAO Minmeng , YANG Zaibin , YANG Weiren , JIANG Shuzhen , ZHANG Guiguo , ZHU Wenguang , ZHANG Jilin , GONG Feng . Energy Metabolic Pattern and Requirements for Growing Dorper Sheep[J]. Chinese Journal of Animal Nutrition, 2013 , 25(6) : 1243 -1250 . DOI: 10.3969/j.issn.1006-267x.2013.06.016

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