Effects of Dietary Fat Sources on Growth Performance and Nutrient Digestion and Metabolism of Minks (Mustelidae vison) in Late Growing Period

YANG Ying; ZHANG Tietao; YUE Zhigang; ZHENG Peihe; QU Bo; XING Xiumei

doi:10.3969/j.issn.1006-267x.2014.02.013

2014 , Vol. 26 >Issue 2: 380 - 388

DOI: https://doi.org/10.3969/j.issn.1006-267x.2014.02.013

Special Economic Animal Nutrition

Effects of Dietary Fat Sources on Growth Performance and Nutrient Digestion and Metabolism of Minks (Mustelidae vison) in Late Growing Period

YANG Ying ,
ZHANG Tietao ,
YUE Zhigang ,
ZHENG Peihe ,
QU Bo ,
XING Xiumei

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1. State Key Laboratory for Molecular Biology of Special Economical Animals, Institute of Special Wild Economic Animal and Plant Science, Chinese Academy Agricultural Sciences, Changchun 130012, China;
2. Changchun Vocational Institute of Technology, Changchun 130000, China

Received date: 2013-08-16

Online published: 2014-01-27

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Abstract

This study was conducted to study the effects of dietary fat sources on growth performance, nutrient digestion and metabolism of minks (Mustelidae vison) in late growing period. One hundred and twenty healthy minks aged 70 days with similar body weight [♂(1.08±0.08) kg, ♀ (0.77±0.04) kg] were selected and randomly assigned to four groups with 30 minks (half male and half female) in each group. Minks were fed experimental diets with fat sources of soybean oil (group Ⅰ), chicken oil (group Ⅱ), fish oil (group Ⅲ) and lard (group Ⅳ), respectively, and the metabolizable energy was 15.5 MJ/kg. [the ether extract (EE) content was 22%] The experiment lasted for 60 days. The results showed as follows: 1) dietary fat sources had no significant effects on body weight of minks at the end of the experiment (P>0.05). 2) Crude protein (CP) digestibility of male minks in group Ⅳ was significantly higher than that in group Ⅰ (P<0.05); CP digestibility of female minks in group Ⅱ was significantly higher than that in group Ⅰ (P<0.05). 3) EE digestibility of male minks in groups Ⅰ and Ⅲ was significantly higher than that in group Ⅳ (P<0.05); EE digestibility of female minks in group Ⅳ was significantly higher than that in the other groups (P<0.05). 4) Retained nitrogen of male minks in group Ⅰ was significantly lower than that in group Ⅳ (P<0.05); retained nitrogen of female minks in group Ⅰ was significantly lower than that in the other groups (P<0.05); there were significant differences in net protein utilization and biological value of protein of female minks among different groups (P<0.05), but no significant differences were observed in those of male minks (P>0.05), and the highest values all presented in group Ⅳ. 5) Gross energy, digestible energy and metabolizable energy of male minks in group Ⅳ were significantly higher than those in groups Ⅰ and Ⅲ (P<0.05); gross energy, degistaile energy and metabolizable energy of female minks in group Ⅰ were significantly lower than those in the other groups (P<0.05). In conclusion, male minks in late growing period have higher fat digestibility when using fish oil was as their dietary fat source; female minks in late growing period have higher nutrient digestibility when using chicken oil was as their dietary fat source; although minks has higher fat digestibility of fish oil, lard can increase net protein utilization rate and retained nitrogen; considering feed cost and nutrient digestion and utilization, it is suggested to use a mixture of fish oil and lard as dietary fat source in husbandry.

Key words： late growing period; minks; fat source; fatty acid; growth performance; digestion and metabolism; metabolizable energy

Cite this article

YANG Ying , ZHANG Tietao , YUE Zhigang , ZHENG Peihe , QU Bo , XING Xiumei . Effects of Dietary Fat Sources on Growth Performance and Nutrient Digestion and Metabolism of Minks (Mustelidae vison) in Late Growing Period[J]. Chinese Journal of Animal Nutrition, 2014 , 26(2) : 380 -388 . DOI: 10.3969/j.issn.1006-267x.2014.02.013

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