Effects of Dietary Zinc Level on Growth Performance and Serum Biochemical Indices of Growing Minks

ZHOU Ning, ZHANG Haihua, LYU Zhichao, ZHANG Ting, HUANG Jian, SUN Haoran, LI Guangyu, YAN Changguo

doi:10.3969/j.issn.1006-267x.2014.11.021

Chinese Journal of Animal Nutrition >

2014 , Vol. 26 >Issue 11: 3341 - 3348

DOI: https://doi.org/10.3969/j.issn.1006-267x.2014.11.021

Special Economic Animal Nutrition

Effects of Dietary Zinc Level on Growth Performance and Serum Biochemical Indices of Growing Minks

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1. Instute of Special Animal and Plant Sciences, Chinese Academy of Agriculture Sciences, Changchun 130112, China;
2. Agriculture College of Yanbian University, Yanji 133002, China;
3. College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China

Received date: 2014-05-12

Online published: 2014-11-17

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Abstract

This experiment was conducted to study the effects of dietary zinc level on growth performance and serum biochemical indices of growing minks. Seventy five 60-day-old healthy male minks were randomly divided into 5 groups with 15 replicates per group and 1 mink per replicate. Minks in the 5 groups were fed the experimental diets supplemented with 0 (group Ⅰ), 50 (group Ⅱ), 100 (group Ⅲ), 300 (group Ⅳ) and 600 mg/kg (group Ⅴ) zinc, respectively. There was a 7-day adaptation period and a 60-day experimental period. The results showed as follows: 1) there was no significant difference in body weight among all groups at 60, 75, 90, 105 and 120 days of age (P>0.05); the average daily gain in groups Ⅲ, Ⅳ and Ⅴ was significantly higher than that in groups Ⅰ and Ⅱ during 76 to 90 days of age (P<0.05), the average daily gain in group Ⅲ was significantly higher than that in groups Ⅰ, Ⅱ and Ⅴ during 106 to 120 days of age (P<0.05). 2) The serum albumin content in group Ⅳ was significantly higher than that in groups Ⅰ and Ⅱ (P<0.05), the serum total protein and globulin contents in group Ⅳ were significantly higher than those in groups Ⅰ, Ⅱ and Ⅴ (P<0.05), the serum immunoglobulin A content in group Ⅳ was significantly higher than that in groups Ⅰ, Ⅱ and Ⅲ (P<0.05), the serum immunoglobulin G content in group Ⅳ was significantly higher than that in group Ⅴ (P<0.05), there was no significant difference in serum immunoglobulin M content among all groups (P>0.05). 3) The serum urea nitrogen content in groups Ⅰ and Ⅱ was significantly higher than that in groups Ⅲ, Ⅳ and Ⅴ (P<0.05), the serum aspartate amino transferase and alanine aminotransferase activities in groups Ⅲ and Ⅳ were significantly higher than those in groups Ⅰ and Ⅴ (P<0.05). 4) The serum alkaline phosphatase activity in groups Ⅲ and Ⅳ was significantly higher than that in groups Ⅰ and Ⅴ (P<0.05), there was no significant difference in serum lactic acid dehydrogenase activity among all groups (P>0.05). 5) The serum zinc content in group Ⅴ was significantly higher than that in other groups (P<0.05), the serum phosphorus content in group Ⅴ was significantly lower than that in groups Ⅰ and Ⅱ (P<0.05), there was no significant difference in serum calcium content among all groups (P>0.05). In conclusion, dietary supplemented with 100 mg/kg zinc can improve the growth performance of growing minks. Dietary supplemented with 300 mg/kg zinc can get the highist protein metabolism related indices contents and zinc related enzyme activities, and it can be propitious to improve the immunity of minks.

Key words： zinc; growth performance; growing; minks; serum biochemical indices

Cite this article

ZHOU Ning, ZHANG Haihua, LYU Zhichao, ZHANG Ting, HUANG Jian, SUN Haoran, LI Guangyu, YAN Changguo . Effects of Dietary Zinc Level on Growth Performance and Serum Biochemical Indices of Growing Minks[J]. Chinese Journal of Animal Nutrition, 2014 , 26(11) : 3341 -3348 . DOI: 10.3969/j.issn.1006-267x.2014.11.021

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