Molecular Nutrition

Effects of Dietary L-Arginine Supplemental Level on Growth Performance, Nutrient Digestibility and Nitrogen Metabolism of Mink during Growing Period

  • WAN Chunmeng ,
  • ZHANG Tietao ,
  • WU Xuezhuang ,
  • LIU Zhi ,
  • GUO Jungang ,
  • GAO Xiuhua ,
  • YANG Fuhe ,
  • XING Xiumei ,
  • YUE Zhigang
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  • 1. Institute of Feed Research, Chinese Academy of Agriculture Sciences, Beijing 100081, China;
    2. State Key Laboratory of Special Animal Molecular Biology, Institute of Economic Animal and Plant Science, Chinese Academy of Agriculture Sciences, Changchun 130112, China

Received date: 2015-03-10

  Online published: 2015-08-13

Abstract

This study was conducted to study the effects of dietary L-arginine (L-Arg) supplemental level on growth performance, nutrient digestibility and nitrogen metabolism of growing mink. Seventy healthy female mink at the age of 60-day were randomly divided into 7 groups with 10 replicates each and 1 mink per replicate. The mink in 7 groups were fed the basal diet (L-Arg content was 1.45%) supplemented with 0 (group Ⅰ), 0.2% (group Ⅱ), 0.4% (group Ⅲ), 0.6% (group Ⅳ), 0.8% (group Ⅴ), 1.0% (group Ⅵ) and 1.2% (group Ⅶ) L-Arg, respectively. The pre-test period lasted for 7 days and the trial lasted for 60 days. The results showed as follows: the final weight, average daily gain and feed/gain of the group Ⅲ were higher than those of the other groups, but the differences were not significant (P>0.05). The dry matter (DM) intake of the group Ⅲ was extremely significantly higher than that of the group Ⅰ(P<0.01) and it was significantly higher than that of groups Ⅱ and Ⅵ (P<0.05). The DM output of the group Ⅲ was significantly higher than that of groups Ⅰ and Ⅳ (P<0.05). The DM digestibility of the group Ⅳ was higher than that of the other groups, but the difference was not significant (P>0.05). The protein digestibility of the group Ⅳ was significantly higher than that of groups Ⅰ, Ⅱ, Ⅲ, Ⅴ and Ⅶ (P<0.05). The fat digestibility of the group Ⅳ was significantly higher than that of groups Ⅴ, Ⅵ and Ⅶ (P<0.05). Nitrogen intake of the group Ⅲ was extremely significantly higher than that of groups Ⅰ and Ⅱ (P<0.01) and it was significantly higher than that of groups Ⅴ and Ⅵ (P<0.05). The fecal nitrogen of the group Ⅲ was extremely significantly higher than that of groups Ⅰ and Ⅳ (P<0.01). The nitrogen deposition of the group Ⅲ was extremely significantly higher than that of groups Ⅰ and Ⅵ (P<0.01) and it was significantly higher than that of groups Ⅱ and Ⅴ (P<0.05). Net protein utilization of groups Ⅲ and Ⅳ was significantly higher than that of the group Ⅰ (P<0.05). Biological value of protein of groups Ⅲ and Ⅳ was significantly higher than that of the group Ⅰ (P<0.05). In conclusion, when the dietary L-Arg supplemental level is 0.4% to 0.6% (L-Arg total content is 1.85% to 2.05%), the growth performance, nutrient digestibility, nitrogen metabolism, net protein utilization and biological value of protein of growing mink are optimal.

Cite this article

WAN Chunmeng , ZHANG Tietao , WU Xuezhuang , LIU Zhi , GUO Jungang , GAO Xiuhua , YANG Fuhe , XING Xiumei , YUE Zhigang . Effects of Dietary L-Arginine Supplemental Level on Growth Performance, Nutrient Digestibility and Nitrogen Metabolism of Mink during Growing Period[J]. Chinese Journal of Animal Nutrition, 2015 , 27(8) : 2607 -2613 . DOI: 10.3969/j.issn.1006-267x.2015.08.035

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