Molecular Nutrition

Effects of Dietary Corn Oil and Palmitic Acid Proportion on Performance, Nutrient Digestibility and Nitrogen Metabolism of Blue Foxes in Fur Development Period

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  • State Key Laboratory of Special Economic Animal Molecular Biology, Institute of Special Animal and Plant Sciences, Changchun 130112, China

Received date: 2016-12-01

  Online published: 2017-06-07

Abstract

This study was conducted to study the effects of dietary corn oil and palmitic acid proportion on performance, nutrient digestibility and nitrogen metabolism of blue foxes in fur development period. Sixty 120-day-old male blue foxes with similar body weight were randomly divided into 6 groups with 10 replicates per group and 1 blue fox per replicate. Foxes in the 6 groups were fed experimental diets with corn oil and palmitic acid proportions of 0:12 (group Ⅰ), 3:9 (group Ⅱ), 5:7 (group Ⅲ), 7:5 (group Ⅳ), 9:3 (group Ⅴ) and 12:0 (group Ⅵ), respectively. The pre-test period lasted for 7 days and the trial period lasted for 67 days. The results showed as follows:1) dietary corn oil and palmitic acid proportion had significant effects on the average daily gain of blue fox in fur development period (P<0.01), but had no significant effects on the average daily feed intake and ratio of feed to gain (P>0.05). The average daily gain was increased with dietary proportion of corn oil increased. Dietary corn oil and palmitic acid proportion had no significant effects on body length, guard fur length and under-guard fur length of blue fox in fur development period (P>0.05), the fresh fur length in group Ⅵ was significantly higher than that in group Ⅰ (P<0.05). 2) Dietary corn oil and palmitic acid proportion had significant effects on fat digestibility, carbohydrate digestibility and dry matter digestibility of blue fox in fur development period (P<0.01), but had no significant effects on the protein digestibility (P>0.05). 3) Dietary corn oil and palmitic acid proportion had no significant effects on nitrogen intake, fecal nitrogen, urea nitrogen, nitrogen retention, net protein utilization and biological value of protein of blue fox in fur development period (P>0.05). The nitrogen retention was increased with dietary proportion of corn oil increased, group Ⅰ was the lowest, while group Ⅵ was the highest. The net protein utilization and biological value of protein in group Ⅴ were the highest. Considering all indices, dietary corn oil and palmitic acid proportion maintained at 9:3 (linoleic acid level is 3.76%) is considered to be an optimal supplemental proportion for blue foxes in terms of maintaining growth performance and nutrient digestibility.

Cite this article

XING Jingya, ZHONG Wei, LIU Shuai, CHEN Mingshuai, SI Huazhe, ZHANG Ting, SUN Haoran, LI Guangyu . Effects of Dietary Corn Oil and Palmitic Acid Proportion on Performance, Nutrient Digestibility and Nitrogen Metabolism of Blue Foxes in Fur Development Period[J]. Chinese Journal of Animal Nutrition, 2017 , 29(6) : 1969 -1975 . DOI: 10.3969/j.issn.1006-267x.2017.06.018

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