Effects of Different Copper Sources on Growth Performance, Nutrient Digestibility and Serum Biochemical Indices of Growing Raccoon Dogs

ZHANG Xinyu; ZHANG Haihua; LIU Hanlu; ZHONG Wei; SI Huazhe; HAN Feifei; CAI Xiheng; LI Guangyu

doi:10.3969/j.issn.1006-267x.2020.04.043

2020 , Vol. 32 >Issue 4: 1842 - 1849

DOI: https://doi.org/10.3969/j.issn.1006-267x.2020.04.043

Effects of Different Copper Sources on Growth Performance, Nutrient Digestibility and Serum Biochemical Indices of Growing Raccoon Dogs

ZHANG Xinyu ,
ZHANG Haihua ,
LIU Hanlu ,
ZHONG Wei ,
SI Huazhe ,
HAN Feifei ,
CAI Xiheng ,
LI Guangyu

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1. State Key Laboratory of Molecular Biology of Special Economic Animals, Institute of Special Wild Economic Animals and Plants, Chinese Academy of Agricultural Sciences, Changchun 130112, China;
2. Hebei Key Laboratory of Specialty Animal Germplasm Resources Innovation and Utilization, Qinhuangdao 066004, China

Received date: 2019-10-22

Online published: 2020-04-16

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Abstract

This experiment was conducted to study the effects of different copper sources on growth performance, nutrient digestibility and serum biochemical indices of growing raccoon dogs. Sixty healthy male raccoon dogs at the age of (60±5) days with the similar body weight were randomly divided into 4 groups with 15 replicates each and 1 raccoon dog per replicate. The raccoon dogs in the 4 groups were fed the basal diet supplemented with 40 mg/kg copper from copper sulfate (group Ⅰ), basic copper chloride (group Ⅱ) and mixed copper (group Ⅲ, the ratio of basic copper chloride to copper methionine was 1:1) and copper methionine (group Ⅳ). The pre-test period lasted for 7 days and the trial period lasted for 55 days. Eight animals in each group were selected for digestion and metabolism test. At the end of the experiment, blood was collected from the hind limbs of each animal. The results showed as follows:1) the final body weight and average daily gain in the group Ⅲ were significantly higher than those in the group Ⅰ (P<0.05). There was no significant difference among groups in the ratio of feed to weight and the average daily intake (P>0.05). 2) The ether extract digestibility in the group Ⅱ was significantly higher than that in the groups Ⅰ, Ⅲ and Ⅳ (P<0.05). The copper digestibility in the group Ⅲ was significantly higher than that in the groups Ⅰ, Ⅱ and Ⅲ (P<0.05). There was no significant difference in dry matter digestibility and crude protein digestibility among groups (P>0.05). 3) There was no significant difference in fecal nitrogen, urine nitrogen content and nitrogen deposition among groups (P>0.05). The fecal copper content in the groups Ⅰ, Ⅱ and Ⅳ was significantly higher than that in the group Ⅲ (P<0.05). The urinary copper content in the group Ⅳ was significantly higher than that in the groups Ⅰ, Ⅱ and Ⅲ (P<0.05). The copper deposition in the group Ⅲ was significantly higher than that in the groups Ⅰ, Ⅱ and Ⅳ (P<0.05). 4) The serum total protein content in the group Ⅱ was significantly higher than that in the groups Ⅲ and Ⅳ (P<0.05). The serum urea content in the groups Ⅲ and Ⅳ was significantly lower than that in the group Ⅰ (P<0.05). There was no significant difference in other serum biochemical indexes among groups (P>0.05). Under the conditions of this experiment, the growth performance, nutrient digestibility, nitrogen deposition and copper deposition of raccoon dog are improved by adding appropriate levels of basic copper chloride and methionine copper.

Key words： copper; raccoon dog; growth performance; nutrient digestibility

Cite this article

ZHANG Xinyu , ZHANG Haihua , LIU Hanlu , ZHONG Wei , SI Huazhe , HAN Feifei , CAI Xiheng , LI Guangyu . Effects of Different Copper Sources on Growth Performance, Nutrient Digestibility and Serum Biochemical Indices of Growing Raccoon Dogs[J]. Chinese Journal of Animal Nutrition, 2020 , 32(4) : 1842 -1849 . DOI: 10.3969/j.issn.1006-267x.2020.04.043

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