Effects of Dietary Bacillus subtilis or Enterococcus faecalis on Growth Performance, Nutrient Digestibility, Nitrogen Metabolism and Pelt Quality of Minks during Winter Fur-Growing Season

NIE Hao, YANG Fuhe, ZHANG Tietao, CUI Hu, SI Huazhe, WANG Zhongcheng, XIE Jingjing, GAO Xiuhua

doi:10.3969/j.issn.1006-267x.2018.05.035

2018 , Vol. 30 >Issue 5: 1911 - 1919

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.05.035

Molecular Nutrition

Effects of Dietary Bacillus subtilis or Enterococcus faecalis on Growth Performance, Nutrient Digestibility, Nitrogen Metabolism and Pelt Quality of Minks during Winter Fur-Growing Season

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1. National Engineering Research Center of Biological Feed, Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Institute of Feed Research, Chinese Academy of Agriculture Sciences, Beijing 100081, China;
2. Institute of Special Animal and Plant Science, Chinese Academy of Agriculture Sciences, Changchun 130112, China

Received date: 2017-11-02

Online published: 2018-05-06

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Abstract

This experiment was conducted to study the effects of dietary Bacillus subtilis or Enterococcus faecalis on growth performance, nutrient digestibility, nitrogen metabolism and pelt quality of minks during winter fur-growing season. Seventy healthy 135-day-age male minks with the average body weight of (1 767.94±174.20) g were randomly divided into 7 groups with 10 replicates per group and 1 mink per replicate. Minks in group Ⅰ (control group) were fed a basal diet, minks in groups Ⅱ, Ⅲ and Ⅳ were fed the basal diet supplemented with 1×10⁸, 1×10⁹ and 1×10¹⁰ CFU/kg Bacillus subtilis, and minks in groups Ⅴ, Ⅵ and Ⅶ were fed the basal diet supplemented with 1×10⁸, 1×10⁹ and 1×10¹⁰ CFU/kg Enterococcus faecalis, respectively. The experiment lasted for 70 days. The results showed as follows:1) compared with control group, the supplementation of 1×10⁹ CFU/kg Enterococcus faecalis significantly increased the final body weight (P<0.05); the supplementation of 1×10¹⁰ CFU/kg Bacillus subtilis or 1×10⁹ and 1×10¹⁰ CFU/kg Enterococcus faecalis significantly increased the average daily gain (P<0.05); the supplementation of 1×10⁹ and 1×10¹⁰ CFU/kg Bacillus subtilis or 1×10⁸, 1×10⁹ and 1×10¹⁰ CFU/kg of Enterococcus faecalis significantly reduced the feed/gain (P<0.05). 2) Compared with control group, the supplementation of 1×10⁹ CFU/kg Enterococcus faecalis significantly increased the protein digestibility (P<0.05); the supplementation of 1×10⁸, 1×10⁹ and 1×10¹⁰ CFU/kg Bacillus subtilis or 1×10⁸, 1×10⁹ and 1×10¹⁰ CFU/kg Enterococcus faecalis significantly increased the fat digestibility (P<0.05). 3) Compared with control group, the supplementation of 1×10¹⁰ CFU/kg Bacillus subtilis or 1×10⁹ CFU/kg Enterococcus faecalis significantly increased the nitrogen deposition (P<0.05). 4) Supplementation of 1×10¹⁰ CFU/kg Bacillus subtilis compared with 1×10⁸ CFU/kg of Enterococcus faecalis, pile fur length was significantly increased (P<0.05) and guard fur length/pile fur length (G/P) was significantly reduced (P<0.05). In conclusion, when the winter fur-growing season of dietary supplemented with 1×10¹⁰ CFU/kg Bacillus subtilis or 1×10⁹ CFU/kg Enterococcus faecalis, the growth performance, nutrient digestibility, nitrogen deposition and pelt quality of minks are more preferably.

Key words： Bacillus subtilis; Enterococcus faecalis; mink; winter fur-growing season; growth performance; nutrient digestibility; pelt quality

Cite this article

NIE Hao, YANG Fuhe, ZHANG Tietao, CUI Hu, SI Huazhe, WANG Zhongcheng, XIE Jingjing, GAO Xiuhua . Effects of Dietary Bacillus subtilis or Enterococcus faecalis on Growth Performance, Nutrient Digestibility, Nitrogen Metabolism and Pelt Quality of Minks during Winter Fur-Growing Season[J]. Chinese Journal of Animal Nutrition, 2018 , 30(5) : 1911 -1919 . DOI: 10.3969/j.issn.1006-267x.2018.05.035

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