Dietary Copper Supplemental Levels: Effects of Performance and Melanin Content in Tissues of Taihe Silky Fowls Aged 5 to 8 Weeks

XU Lanjiao; LI Guanhong; QU Mingren; YOU Jinming; YI Zhonghua

doi:10.3969/j.issn.1006-267x.2013.04.021

2013 , Vol. 25 >Issue 4: 827 - 832

DOI: https://doi.org/10.3969/j.issn.1006-267x.2013.04.021

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Dietary Copper Supplemental Levels: Effects of Performance and Melanin Content in Tissues of Taihe Silky Fowls Aged 5 to 8 Weeks

XU Lanjiao ,
LI Guanhong ,
QU Mingren ,
YOU Jinming ,
YI Zhonghua

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College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China

Received date: 2012-10-25

Online published: 2013-03-25

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Abstract

The aim of this study was to investigate the effects of dietary copper (Cu) supplemental level on performance and melanin content in tissues of Taihe silky fowls aged 5 to 8 weeks. A total of 270 Taihe silky fowls aged 29 days were randomly allotted to 6 groups with 3 replicates per group and 15 birds per replicate. The birds were fed the corn-soybean meal based diet (containing 4.77 mg/kg Cu) with 0, 5, 15, 30, 60 and 125 mg/kg Cu, respectively, and were raised to 56 days of age. The results showed as follows: the average daily gain (ADG), the average daily feed intake (ADFI) and the ratio of feed to gain (F/G) of Taihe silky fowls aged from 5 to 8 weeks were significantly influenced by appropriate Cu supplementation (P<0.05), and peaked at 30 mg/kg supplementation. And the melanin content and tyrosinase activity in serum, liver, kidney, skin and muscle of Taihe silky fowls were significantly affected by appropriate Cu supplementation (P<0.05 or P<0.01). All above parameters tended to increase at first and then decrease with increasing Cu supplemental level, and peaked at 30 mg/kg supplementation. It is concluded that the supplementation of Cu in the corn-soybean meal based diet can increase performance and melanin content in tissues of Taihe silky fowls, and the optimum supplemental level is 30 mg/kg.

Key words： Taihe silky fowls; Cu; performance; melanin; tyrosinase

Cite this article

XU Lanjiao , LI Guanhong , QU Mingren , YOU Jinming , YI Zhonghua . Dietary Copper Supplemental Levels: Effects of Performance and Melanin Content in Tissues of Taihe Silky Fowls Aged 5 to 8 Weeks[J]. Chinese Journal of Animal Nutrition, 2013 , 25(4) : 827 -832 . DOI: 10.3969/j.issn.1006-267x.2013.04.021

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