Effects of Dietary Protein and Exogenous Melatonin Levels on Growth Performance, Serum Biochemical Parameters and Nutrient Digestibility of Minks (Mustela vison)

SONG Xingchao; XUE Hailong; CHEN Xiumin; YANG Yifeng; WEI Haijun; LI Guangyu; YANG Fuhe

doi:10.3969/j.issn.1006-267x.2013.01.014

2013 , Vol. 25 >Issue 1: 107 - 117

DOI: https://doi.org/10.3969/j.issn.1006-267x.2013.01.014

Special Economic Animal Nutrition

Effects of Dietary Protein and Exogenous Melatonin Levels on Growth Performance, Serum Biochemical Parameters and Nutrient Digestibility of Minks (Mustela vison)

SONG Xingchao ,
XUE Hailong ,
CHEN Xiumin ,
YANG Yifeng ,
WEI Haijun ,
LI Guangyu ,
YANG Fuhe

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State Key Laboratory of Special Economic Animal Molecular Biology, Institute of Special Animal and Plant Science, Chinese Academy of Agricultural Sciences, Changchun 130112, China

Received date: 2012-07-04

Online published: 2013-01-04

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Abstract

This experiment was conducted to study the effects of dietary crude protein (CP) and exogenous melatonin (MT) levels on growth performance, serum biochemical parameters and nutrient digestibility of minks. Ninety healthy fifty-day-old male minks with a similar body weight were randomly divided into 6 groups with 15 replicates per group and 1 mink per replicate. The trial was carried out using three dietary CP levels (32%, 36% and 40%) and two subcutaneous implant exogenous MT levels (0 and 10 mg per mink) in a 3?2 factorial design. The trial lasted for 64 days. The results showed as follows: 1) the final weight of minks fed diets with 40% CP level in 10 mg MT group was significantly higher than that in 0 mg MT group (P<0.05), and the average daily gain (ADG) of minks fed diets with 40% CP level in 10 mg MT group was significantly higher than that in 0 mg MT group (P<0.05). There was no significant interaction between dietary CP and exogenous MT levels in the final weight and ADG (P>0.05). 2) The serum albumin (ALB) content of minks fed diets with 32% and 40% CP levels in 10 mg MT group was significantly lower than that in 0 mg MT groups (P<0.01); the serum triglyeride (TG) content of minks fed diets with 32% and 36% CP levels was significantly higher than those minks fed diets with of 40% CP level (P<0.05). There was significant interaction between dietary CP and exogenous MT levels in the serum ALB content (P<0.01), but there was no significant interaction between dietary CP and exogenous MT levels in the serum total protein (TP), urea nitrogen (UN), TG content and alkaline phosphatase (ALP) activity (P>0.05). 3) For 10 mg MT groups, the dry matter (DM) intake of minks fed diets with 32% and 36% CP levels was significantly higher than that of minks fed diets with 40% CP level (P<0.01). For 0 mg MT groups, the DM intake and excretion of minks fed diets with 32% CP level were significantly higher than that of minks fed diets with 40% CP level (P<0.01). There was no significant interaction between dietary CP and exogenous MT levels in the feed intake, DM intake, DM output and DM digestibility (P>0.05). 4) For 10 mg MT groups, the ether extract (EE) digestibility of minks fed diets with 36% CP level was siginificantly higher than that of minks fed diets with 32% and 40% CP levels (P<0.05), the calcium (Ca) digestibility of minks fed diets with 32% CP level was significantly higher than that of minks fed diets with 40% CP level (P<0.01), and the phosphonium (P) digestibility of minks fed diets with 32% CP level was significantly higher than that of minks fed diets with 36% and 40% CP levels (P<0.01). For 0 mg MT groups, the Ca digestibility of minks fed diets with 36% CP level was significantly higher than that of minks fed diets with 40% CP level (P<0.01), and the P digestibility of minks fed diets with 32% CP level was significantly higher than that of minks fed diets with 36% and 40% CP levels (P<0.01). There was no significant interaction between dietary CP and exogenous MT levels in the digestibility of CP, EE, Ca and P (P>0.05). Considering all factors, dietary 32% to 36% CP level is considered to be optimal for minks with 10 mg exogenous MT implantation.

Key words： mink; crude protein; melatonin; growth performance; serum biochemical parameters; nutrient digestibility

Cite this article

SONG Xingchao , XUE Hailong , CHEN Xiumin , YANG Yifeng , WEI Haijun , LI Guangyu , YANG Fuhe . Effects of Dietary Protein and Exogenous Melatonin Levels on Growth Performance, Serum Biochemical Parameters and Nutrient Digestibility of Minks (Mustela vison)[J]. Chinese Journal of Animal Nutrition, 2013 , 25(1) : 107 -117 . DOI: 10.3969/j.issn.1006-267x.2013.01.014

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