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Dietary Copper Supplemental Level:Effects of Performance and Melanin Content in Tissues of Taihe Silky Fowls Aged 9 to 12 Weeks

  • XU Lanjiao ,
  • WAN Gen ,
  • LI Guanhong ,
  • YOU Jinming ,
  • QU Mingren
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  • College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China

Received date: 2013-10-08

  Online published: 2014-04-01

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 9 to 12 weeks. A total of 270 57-day-old Taihe silky fowls were randomly allotted to 6 groups with 3 replicates per group and 15 birds per replicate. The birds were fed a corn-soybean meal based diet (containing Cu 4.80 mg/kg) with 0, 5, 15, 30, 60 and 125 mg/kg Cu, respectively, and were raised to 84 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 9 to 12 weeks were not influenced by dietary Cu supplemental level (P>0.05). And, the melanin content and tyrosinase activity in serum, liver, kidney, skin and muscle of Taihe silky fowls aged 9 to 12 weeks were significantly affected by dietary suitable Cu supplementation (P<0.05 or P<0.01). All above parameters tended to increase at first and then decrease with Cu supplemental level increasing. As indicated by regression analysis, maximum melanin content in tissues could be obtained when the corn-soybean based diets were supplemented with 50 to 72 mg/kg Cu. It is concluded that the performance of Taihe silky fowls aged 9 to 12 weeks is not influenced by the supplementation of Cu in the corn-soybean based diets, but the supplementation of Cu can stimulate melanin biosynthesis in tissues of Taihe silky fowls.

Cite this article

XU Lanjiao , WAN Gen , LI Guanhong , YOU Jinming , QU Mingren . Dietary Copper Supplemental Level:Effects of Performance and Melanin Content in Tissues of Taihe Silky Fowls Aged 9 to 12 Weeks[J]. Chinese Journal of Animal Nutrition, 2014 , 26(4) : 1061 -1067 . DOI: 10.3969/j.issn.1006-267x.2014.04.027

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