ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2015, Vol. 46 ›› Issue (6): 974-980.doi: 10.11843/j.issn.0366-6964.2015.06.013

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Effects of Rumen-Protected Methionine and Lysine on Growth Performance,Nutrient Digestibility and Serum Biochemical Indices in Sika Deer during the Wintering Season

HUANG Jian,BAO Kun,ZHANG Tie-tao,CUI Xue-zhe,LI Guang-yu,YANG Fu-he,ZHANG Ting,WANG Kai-ying*   

  1. (State Key Laboratory for Molecular Biology of Special Economic Animals,Institute of Special Wild Economic Animal and Plant Sciences,Chinese Academy of Agricultural Sciences,Changchun 130112,China)
  • Received:2014-08-04 Online:2015-06-23 Published:2015-06-23

Abstract:

This experiment was conducted to investigate the effects of low crude protein diet supplemented rumen-protected methionine (RPM) and lysine (RPL) on growth performance,nutrient digesitibility and serum biochemical indices in sika deer during the wintering season.Sixteen healthy 8-month-old sika deer were randomly divided into 4 groups with 4 replicates per group and 1 sika deer per replicate.Sika deers were fed 4 diets:Control group (GroupⅠ) fed 16.52% crude protein (CP) basal diet,tests group fed 13.70% CP diet with 0.30% RPL and 0 (Group Ⅱ),0.08% (Group Ⅲ),0.16%(Group Ⅳ) RPM.The results showed that average daily gain (ADG) of control group and group Ⅳ were higher than group Ⅱ,and average daily feed intake (ADFI) of group Ⅲ was lower than control group and group Ⅳ,and feed to gain ratio (F/G) of group Ⅱ was higher than other groups(P<0.05);digestibility of phosphorus (P) of control group was lower than other groups (P<0.01) and group Ⅱ was lower than group Ⅲ (P<0.05),CP and ether extract(EE) digestibility of group Ⅱ were lower than group Ⅳ;serum urea nitrogen content of control group was higher than group Ⅲ (P<0.05) and group Ⅳ (P<0.01),glucose and uric acid content of control group were higher than other groups (P<0.01);other index had no significant influence (P>0.05).It is concluded that reducing diet CP level from 16.52% to 13.70% reduced nitrogen and phosphorus emission,slowed fawn growth,however,0.16% RPM and 0.30% RPL supplementation would enhance fawn growth,promoted nutrient digestion and metabolism balance.

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