Effects of Dietary Zinc Level on Growth Performance, Nutrient Digestibility and Nitrogen Metabolism of Growing Blue Foxes (Alopex lagopus)

GUO Qiang; ZHANG Tietao; LIU Zhi; XING Siyuan; YANG Fuhe; XING Xiumei

doi:10.3969/j.issn.1006-267x.2013.10.034

2013 , Vol. 25 >Issue 10: 2497 - 2503

DOI: https://doi.org/10.3969/j.issn.1006-267x.2013.10.034

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Effects of Dietary Zinc Level on Growth Performance, Nutrient Digestibility and Nitrogen Metabolism of Growing Blue Foxes (Alopex lagopus)

GUO Qiang ,
ZHANG Tietao ,
LIU Zhi ,
XING Siyuan ,
YANG Fuhe ,
XING Xiumei

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

Received date: 2013-04-16

Online published: 2013-09-16

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Abstract

This experiment was conducted to study the effects of dietary zinc level on growth performance, nutrient digestibility and nitrogen metabolism of growing blue foxes. Nighty 8-week-old healthy blue foxes with an average body weight of (2.21±0.49) kg were divided into 5 groups with 18 foxes per group, each group had 9 male foxes and 9 female foxes, and the average body weight of each group showed no significant difference (P>0.05). The blue foxes were fed the diets with dietary zinc levels of 39.75 (group Ⅰ), 60.00 (group Ⅱ), 80.00 (group Ⅲ), 100.00 (group Ⅳ) and 120.00 mg/kg (group Ⅴ), respectively. The pre-test lasted for 7 days and the trial period lasted for 60 days. The results showed as follows: 1) there was no significant difference in the average daily gain of male foxes among all groups (P>0.05); the average daily gain of female foxes in group Ⅱ was significantly higher than that in group Ⅴ (P<0.01). 2) The dry matter digestibility of male foxes in group Ⅱ was significantly higher than that in groups Ⅰ and Ⅳ (P<0.01), and was significantly higher than that in groups Ⅲ and Ⅴ (P<0.05); the fat digestibility in group Ⅱ was significantly higher than that in groups Ⅰ, Ⅲ and Ⅳ (P<0.01); the protein digestibility in group Ⅱ was significantly higher than that in groups Ⅰ, Ⅳ and Ⅴ (P<0.01). 3) The nitrogen intake of male foxes in groups Ⅰand Ⅳ was significantly higher than that in group Ⅱ (P<0.01); the fecal nitrogen in groups Ⅰ, Ⅳ and Ⅴ was significantly higher than that in group Ⅱ (P<0.01). The urine nitrogen of female foxes in groups Ⅲ and Ⅴ was significantly higher than that in group Ⅱ (P<0.05); the nitrogen deposition in groups Ⅰ and Ⅱ was significantly higher than that in group Ⅴ (P<0.01), and significantly higher than that in group Ⅲ (P<0.05); the net protein utilization in groups Ⅰ and Ⅱ was significantly higher than that in group Ⅴ (P<0.01), and significantly higher than that in group Ⅲ (P<0.05); the biological value of protein in group Ⅱ was significantly higher than that in group Ⅴ (P<0.01), and the biological value of protein in groups Ⅰand Ⅱ was significantly higher than that in groups Ⅲ and Ⅴ (P<0.05). In conclusion, dietary zinc level at 60.00 mg/kg can improve the growth performance and net protein utilization, and decline the drain of fecal nitrogen and urine nitrogen.

Key words： blue foxes; zinc; growing period; growth performance; nutrient digestibility; nitrogen metabolism

Cite this article

GUO Qiang , ZHANG Tietao , LIU Zhi , XING Siyuan , YANG Fuhe , XING Xiumei . Effects of Dietary Zinc Level on Growth Performance, Nutrient Digestibility and Nitrogen Metabolism of Growing Blue Foxes (Alopex lagopus)[J]. Chinese Journal of Animal Nutrition, 2013 , 25(10) : 2497 -2503 . DOI: 10.3969/j.issn.1006-267x.2013.10.034

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