Effect of Dietary Fat Level on Performance and Blood Biochemical Parameters of Minks during Lactation Period

ZHANG Haihua, ZHANG Tietao, ZHOU Ning, SUN Weili, ZHONG Wei, CHANG Zhongjuan, ZHAO Jingbo, LI Guangyu

doi:10.3969/j.issn.1006-267x.2014.08.025

Chinese Journal of Animal Nutrition >

2014 , Vol. 26 >Issue 8: 2225 - 2231

DOI: https://doi.org/10.3969/j.issn.1006-267x.2014.08.025

Special Economic Animal Nutrition

Effect of Dietary Fat Level on Performance and Blood Biochemical Parameters of Minks during Lactation Period

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1. Institute of Special Animal and Plant Sciences, Chinese Academy of Agriculture Sciences, State Key Laboratory for Molecular Biology of Special Economic Animals, Changchun 130112, China;
2. Agriculture College of Yanbian University, Yanji 133002, China

Received date: 2014-02-25

Online published: 2014-08-13

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Abstract

This experiment was conducted to study the effects of dietary fat level on performance and blood biochemical parameters of minks during lactation period. A total of 60 litters of healthy lactation minks and their kids were randomly allocated to 4 groups with 15 replicates per group and 1 litter per replicate. Minks in the 4 groups were fed 4 experimental diets that contained 14.43% (groupⅠ), 18.80% (group Ⅱ), 22.77% (group Ⅲ) and 26.89% (group Ⅳ) fat, respectively, and the protein level (45%) of the 4 experimental diets was the same. The experiment lasted for 45 days. The results showed as follows: 1) the average body weight of kids at 9, 18, 27 and 45 days of age in group Ⅱ was the highest, and it was significantly higher than that in group Ⅳ at 9 days of age, in groups Ⅰ and Ⅳ at 18 days of age (P<0.05), in other groups at 27 days of age and in groups Ⅰ and Ⅳ at 45 days of age (P<0.05). The average body weight of female minks in group Ⅳ was always the highest when kids were at 9, 18, 27 and 45 days of age, and it was significantly higher than that in other groups at 9 and 27 days of age (P<0.05), in groups Ⅰ and Ⅱ at 18 days of age (P<0.05) and in group Ⅱ at 45 days of age (P<0.05). At different days of age, the survival rate of kids had no significant difference among all groups (P>0.05), but groups Ⅱ and Ⅲ had the highest survival rate at 45 days of age. 2) The contents of total protein, albumin, glucose and triglyceride in serum of female minks were not significantly affected by dietary fat level (P>0.05). With dietary fat level increasing, the serum urea nitrogen content of female minks was decreased, and that in groups Ⅱ, Ⅲ and Ⅳ was significantly higher than that in group Ⅰ (P<0.01), as well as that in group Ⅳ was significantly higher than that in groups Ⅱ and Ⅲ (P<0.01), but no significant difference was found between groups Ⅱ and Ⅲ (P>0.05). The contents of cholesterol, high density lipoprotein and low density lipoprotein in serum of female minks had an increasing trend with dietary fat level increasing, and the contents of total cholesterol and high density lipoprotein in serum in groups Ⅰ and Ⅱ were significantly lower than those in groups Ⅲ and Ⅳ (P<0.05), while the serum low density lipoprotein content in group Ⅰ was significantly lower than that in groups Ⅲ and Ⅳ (P<0.05). In conclusion, the optimal fat level of minks during lactation period is 18.80% under the conditions of this experiment.

Key words： mink; lactation period; fat level; serum biochemical parameters

Cite this article

ZHANG Haihua, ZHANG Tietao, ZHOU Ning, SUN Weili, ZHONG Wei, CHANG Zhongjuan, ZHAO Jingbo, LI Guangyu . Effect of Dietary Fat Level on Performance and Blood Biochemical Parameters of Minks during Lactation Period[J]. Chinese Journal of Animal Nutrition, 2014 , 26(8) : 2225 -2231 . DOI: 10.3969/j.issn.1006-267x.2014.08.025

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