Energy and Protein Requirements of Growing Xinyang Green Shell Hens

YUAN Chao; XU Zhigang; JIANG Yuanjing; YAN Huaxiang; MA Ting; ZOU Xiaoting

doi:10.3969/j.issn.1006-267x.2013.04.010

Chinese Journal of Animal Nutrition >

2013 , Vol. 25 >Issue 4: 735 - 742

DOI: https://doi.org/10.3969/j.issn.1006-267x.2013.04.010

Poultry Nutrition

Energy and Protein Requirements of Growing Xinyang Green Shell Hens

YUAN Chao ,
XU Zhigang ,
JIANG Yuanjing ,
YAN Huaxiang ,
MA Ting ,
ZOU Xiaoting

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1. Key Laboratory of Animal Nutrition and Feed Science of Ministry of Agriculture, Feed Science Institute, Zhejiang University, Hangzhou 310058, China;
2. Shanghai Poultry Breeding Co., Ltd., Shanghai 201399, China

Received date: 2012-11-22

Online published: 2013-03-25

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Abstract

This study was conducted to investigate the effects of dietary energy and protein levels on growth performance and carcass composition of growing green shell hens, and to gain the energy and protein requirements of the hens. A total of 864 Xinyang green shell pullets aged 60 days were randomly allocated to 6 groups with 4 replicates per group and 36 hens per replicate. Hens were fed with 6 diets under different matabolizable energy (ME) levels (11.09 and 11.72 MJ/kg) and crude protein (CP) levels (14.00%, 14.50% and 15.00%). The pre-trial period was one week, and the trial period was eight weeks. The results showed as follows: 1) different energy levels had an extremely significant influence on average daily feed intake (ADFI) and average daily grain (ADG) (P<0.01), while different protein levels had no significant influence on ADFI and ADG (P>0.05); there was no significant interaction between energy and protein in ADFI and ADG (P>0.05). 2) Different energy levels had significant influence on the length of tibia (P<0.05), while different protein levels had no significant influence on the length of tibia (P>0.05); there was no significant interaction between energy and protein in the length of tibia (P>0.05). 3) Different energy and protein levels had no significant influence on carcass indices (P>0.05), while there was significant interaction between energy and protein in general energy of carcass. According to the mathematical model (Y=a+bx) of unitary linear regression analysis based on the results of the rearing and comparative slaughter experiments, ME and CP requirements of growing green shell pullets are as follows: ME 11.40 MJ/kg and CP 14.45%.

Key words： green shell hens; growing period; energy; protein; requirement

Cite this article

YUAN Chao , XU Zhigang , JIANG Yuanjing , YAN Huaxiang , MA Ting , ZOU Xiaoting . Energy and Protein Requirements of Growing Xinyang Green Shell Hens[J]. Chinese Journal of Animal Nutrition, 2013 , 25(4) : 735 -742 . DOI: 10.3969/j.issn.1006-267x.2013.04.010

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