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Effects of Tenebrio molitor L. on Body Weight Change, Nutrient Digestibility, Nitrogen Metabolism and Fur Quality of Minks during Winter Hair Period

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  • 1. State Key Laboratory of Special Economic Animal Molecular Biology, Institute of Special Animal and Plant Science, Chinese Academy of Agriculture Sciences, Changchun 130112, China;
    2. Institute of Feed Research, Chinese Academy of Agriculture Sciences, Beijing 100081, China;
    3. Animal Husbandry and Veterinary Sciences Institute, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China

Received date: 2014-03-06

  Online published: 2014-08-13

Abstract

This experiment was conducted to study the effects of Tenebrio molitor L. on body weight change, nutrient digestibility, nitrogen metabolism and fur quality of minks during winter hair period. The single factor method was taken in the trial, and sixty minks were randomly assigned into 5 groups. Minks in group Ⅰ were fed a basal diet (without Tenebrio molitor L.), and the others in groups Ⅱ to Ⅴ were fed the experimental diets supplemented with 2%, 4%, 8% and 16% Tenebrio molitor L., respectively. The pre-test period lasted for 7 days and the trial period lasted for 80 days. The results showed as follow: 1) on 17-11-13, the body weight of minks in groups Ⅳ and Ⅴ was significantly higher than that in group Ⅲ (P<0.05). There was no difference on average daily gain among all groups (P>0.05). 2) The feed intake of minks in group Ⅳ was significantly higher than that in groups Ⅰ and Ⅱ (P<0.01), the crude protein digestibility of minks in groups Ⅱ and Ⅴ was significantly higher than that in group Ⅳ (P<0.01). There were no differences in the crude fat digestibility and ash digestibility among all groups (P>0.05). 3) The nitrogen intake of minks in groups Ⅲ, Ⅳ and Ⅴ was significantly higher than that in groups Ⅰ and Ⅱ (P<0.05), the fecal nitrogen of minks in groups Ⅲ and Ⅳ was significantly higher than that in groups Ⅰ and Ⅱ (P<0.01), the urine nitrogen of minks in group Ⅴ was significantly higher than that in group Ⅰ (P<0.01), and the nitrogen retention, net protein utilization and biological value of protein of minks in group Ⅳ were significantly higher than those in group Ⅰ (P<0.05). 4) The fur length of minks in group Ⅴ was significantly higher than that in group Ⅰ (P<0.05), the fresh fur weight of minks in group Ⅴ was significantly higher than that in group Ⅲ (P<0.05), and the guard hair length of minks in group Ⅲ was significantly higher than that in group Ⅳ (P<0.05). In conclusion, dietary supplemented with Tenebrio molitor L. can reduce the use of fish meal, meat and bone meal and bean oil, and dietary supplemented with 8% to 16% Tenebrio molitor L. can enhance the fur quality.

Cite this article

ZHANG Tietao, ZHANG Haihua, LIU Zhi, GUO Qiang, WU Xuezhuang, YANG Fuhe, LI Guangyu, WANG Haihong . Effects of Tenebrio molitor L. on Body Weight Change, Nutrient Digestibility, Nitrogen Metabolism and Fur Quality of Minks during Winter Hair Period[J]. Chinese Journal of Animal Nutrition, 2014 , 26(8) : 2414 -2420 . DOI: 10.3969/j.issn.1006-267x.2014.08.049

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