Effects of Dietary Copper Level on Serum Lipid Metabolism Parameters, Blood Parameters, Intestinal Digestive Enzyme Activities and Bile Trace Element Contents of Minks during Winter Fur-Growing Period

WU Xuezhuang, YANG Ying, LIU Zhi, GAO Xiuhua, YANG Fuhe, YANG Peilong, XING Xiumei

doi:10.3969/j.issn.1006-267x.2018.04.023

2018 , Vol. 30 >Issue 4: 1406 - 1414

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.04.023

Molecular Nutrition

Effects of Dietary Copper Level on Serum Lipid Metabolism Parameters, Blood Parameters, Intestinal Digestive Enzyme Activities and Bile Trace Element Contents of Minks during Winter Fur-Growing Period

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1. College of Animal Science, Anhui Science and Technology University, Bengbu 233100, China;
2. Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
3. Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun 130112, China

Received date: 2017-10-16

Online published: 2018-04-03

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Abstract

This experiment was conducted to investigate the effects of dietary copper level on serum lipid metabolism parameters, blood parameters, intestinal digestive enzyme activities and bile trace element contents of minks during winter fur-growing period. One hundred and forty healthy 110-day-old minks were randomly allocated to 7 groups with 20 replicates per group and 1 mink per replicate. Minks in the seven groups were fed the diets (copper content was 7.68 mg/kg) supplemented with 0 (control group), 6 (Cu6 group), 12 (Cu12 group), 24 (Cu24 group), 48 (Cu48 group), 96 (Cu96 group) and 192 mg/kg (Cu192 group) copper, respectively. The pre-test period lasted for 7 days, and the trial lasted for 90 days. The results showed as follows:1) the serum total cholesterol (TC) content of minks was linear (♂:P<0.01, ♀:P<0.01) or quadratic (♂:P<0.05, ♀:P<0.01) decreased with dietary copper level increasing. The serum TC and triglyceride (TG) contents of male minks were significantly higher than those of female minks (P<0.05). 2) Dietary copper level had no significant effects on hemoglobin content and hematocrit (P>0.05), and the hemoglobin content and hematocrit had no significant difference between male and female minks (P>0.05). 3) The jejunum lipase activity of male minks was significantly higher than that of female minks (P<0.05), the activities of trypsase in jejunum and ileum and amylase in jejunum of male minks were significantly higher than those of female minks (P<0.01). 4)The bile copper content of minks was linear increased with dietary copper level increasing (P<0.05), the bile manganese and iron contents of minks were linear or quadratic decreased with dietary copper level increasing (P<0.01). In conclusion, dietary copper has an important effect on regulate the serum TC and bile trace element contents of minks.

Key words： copper; minks; lipid metabolism; bile; digestive enzyme activities

Cite this article

WU Xuezhuang, YANG Ying, LIU Zhi, GAO Xiuhua, YANG Fuhe, YANG Peilong, XING Xiumei . Effects of Dietary Copper Level on Serum Lipid Metabolism Parameters, Blood Parameters, Intestinal Digestive Enzyme Activities and Bile Trace Element Contents of Minks during Winter Fur-Growing Period[J]. Chinese Journal of Animal Nutrition, 2018 , 30(4) : 1406 -1414 . DOI: 10.3969/j.issn.1006-267x.2018.04.023

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