Copper Requirement of Male Yellow-Feathered Broilers Aged from 43 to 63 Days

LI Long, JIANG Shouqun, ZHENG Chuntian, GOU Zhongyong, CHEN Fang, RUAN Dong, LIN Xiajing

doi:10.3969/j.issn.1006-267x.2014.11.012

Chinese Journal of Animal Nutrition >

2014 , Vol. 26 >Issue 11: 3266 - 3275

DOI: https://doi.org/10.3969/j.issn.1006-267x.2014.11.012

Poultry Nutrition

Copper Requirement of Male Yellow-Feathered Broilers Aged from 43 to 63 Days

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State Key Laboratory of Livestock and Poultry Breeding, Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of Agriculture, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China

Received date: 2014-05-28

Online published: 2014-11-17

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Abstract

This experiment was conducted to investigate the effects of dietary copper level on growth performance, antioxidative property, copper content in serum and liver of male yellow-feathered broilers aged from 43 to 63 days, and then to estimate the dietary copper requirement of male yellow-feathered broilers. Nine hundred male fast large Lingnan yellow-feathered broilers aged 43 days with healthy and well developed body were randomly assigned to six dietary groups. Each group consisted of six replicates with 25 birds per replicate. Group 1 (control group) was fed with the basal diet (copper level was 2.74 mg/kg), and group 2 to 6 were fed with the basal diet added with 4, 8, 16, 32 and 64 mg/kg copper, respectively. Results showed as follows: 1) compared with control group, the final weight, average daily gain and average daily feed intake of broilers in 16 and 32 mg/kg copper groups were significantly higher (P<0.05), but there was no significant difference in the ratio of feed to gain among all groups (P>0.05). 2) Compared with control group, the CuZn-superoxide dismutase (CuZn-SOD) activity in serum in 16 and 32 mg/kg copper groups was significantly higher (P<0.05). The CuZn-SOD activity in liver was significantly higher in 32 and 64 mg/kg copper groups (P<0.05). There was no significant difference in CuZn-SOD activity of breast muscle (P>0.05).Dietary copper level did not affect the content of malondialdehyde (MDA) in serum and liver of broilers (P>0.05). The MDA content in breast muscle in 32 and 64 mg/kg copper groups was significantly lower (P<0.05). The ceruloplasmin activity in serum in 16, 32 and 64 mg/kg copper groups was significantly lower (P<0.05).3) Compared with control group, the copper content of liver in 8 and 16 mg/kg copper groups was significantly lower (P<0.05). But copper addition had no significant effects on the content of copper in serum and the content of metallothionein in liver (P>0.05). In conclusion, based on the growth performance and antioxidative property, the apropriate copper supplemental level of male yellow-feathered broilers aged from 43 to 63 days is 16 and 32 mg/kg, respectively. Based on the 2.74 mg/kg copper level in the basal diet, the copper requirement of male yellow-feathered broilers aged from 43 to 63 days is 18.74 and 34.74 mg/kg, respectively.Based on the estimated result of grown performance and liver CuZn-lSOD activity by broken-line regression model, the copper requirement of male yellow-feather broilers aged from 43 to 63 days is 19.94 and 38.34 mg/kg, respectively.

Key words： yellow-feathered broilers; copper; requirement; growth performance; antioxidative property

Cite this article

LI Long, JIANG Shouqun, ZHENG Chuntian, GOU Zhongyong, CHEN Fang, RUAN Dong, LIN Xiajing . Copper Requirement of Male Yellow-Feathered Broilers Aged from 43 to 63 Days[J]. Chinese Journal of Animal Nutrition, 2014 , 26(11) : 3266 -3275 . DOI: 10.3969/j.issn.1006-267x.2014.11.012

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