Effects of Dietary Zinc Supplemental Level on Reproductive Performance, Nutrient Digestibility and Nitrogen Metabolism of Reproducing Male Minks

WU Xuezhuang; ZHANG Tietao; YANG Ying; LIU Zhi; GAO Xiuhua; YANG Fuhe; XING Xiumei

doi:10.3969/j.issn.1006-267x.2013.08.019

2013 , Vol. 25 >Issue 8: 1817 - 1824

DOI: https://doi.org/10.3969/j.issn.1006-267x.2013.08.019

Special Economic Animal Nutrition

Effects of Dietary Zinc Supplemental Level on Reproductive Performance, Nutrient Digestibility and Nitrogen Metabolism of Reproducing Male Minks

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

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1. Institute of Feed Research, Chinese Academy of Agricultural Science, Beijing, 100081, China;
2. State Key Laboratory of Special Economic Animal Molecular Biology, Changchun 130112, China;
3. Institute of Economic Animal and Plant Science, Chinese Academy of Agricultural Science, Changchun 130112, China

Received date: 2013-02-01

Online published: 2013-07-15

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Abstract

This experiment was conducted to study the effects of dietary zinc supplemental level on reproductive performance, nutrient digestibility and nitrogen metabolism of reproducing male minks. Sixty healthy male minks were randomly divided into 5 groups with 12 replicates per group and 1 mink per replicate. The minks in the 5 groups were fed experimental diets with zinc supplemental levels of 0 (group Ⅰ), 50 (group Ⅱ), 100 (group Ⅲ), 200 (group Ⅳ) and 400 mg/kg (group Ⅴ), respectively. The pre-test period lasted for 7 days and the trial period lasted for 120 days. The results showed as follows: 1) the sperm motility in group Ⅰ was significantly lower than that in groups Ⅱ and Ⅲ (P<0.01), and was significantly lower than that in group Ⅴ (P<0.05). The testicular diameter in group Ⅰ was significantly smaller than that in groups Ⅱ (P<0.01) and Ⅲ (P<0.05). The successful mating times on male mink in group Ⅰ was significantly lower than that in group Ⅲ (P<0.01), and was significantly lower than that in groups Ⅱ and Ⅳ (P<0.05). 2) There were no significant differences in the dry matter (DM) intake and fat digestibility among all groups (P>0.05). The DM output in group Ⅲ was significantly higher than that in group Ⅰ (P<0.05); the DM digestibility in group Ⅱ was significantly higher than that in group Ⅴ (P<0.01), and was significantly higher than that in group Ⅳ (P<0.05); the protein digestibility in groups Ⅱ and Ⅲ was significantly higher than that in group Ⅴ (P<0.05). 3) There were no significant differences in the nitrogen intake, urine nitrogen, nitrogen deposition, net protein utilization and biological value of protein among all groups (P>0.05). In conclusion, when the zinc supplemental level arrives at 50 to 100 mg/kg (total zinc level is 140 to 190 mg/kg), the reproductive performance of minks is more ideal. When the zinc supplemental level arrives at 100 mg/kg (total zinc level is 190 mg/kg), the DM intake of minks is higher. Dietary zinc supplemental level has no effect on DM intake, fat digestibility, nitrogen deposition, net protein utilization and biological value of protein in minks.

Key words： zinc; diet; mink; reproductive performance; digestibility

Cite this article

WU Xuezhuang , ZHANG Tietao , YANG Ying , LIU Zhi , GAO Xiuhua , YANG Fuhe , XING Xiumei . Effects of Dietary Zinc Supplemental Level on Reproductive Performance, Nutrient Digestibility and Nitrogen Metabolism of Reproducing Male Minks[J]. Chinese Journal of Animal Nutrition, 2013 , 25(8) : 1817 -1824 . DOI: 10.3969/j.issn.1006-267x.2013.08.019

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