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Effects of Crude Protein Levels on Nitrogen Balance in Adult Jindo Dog

사료내 조단백질 수준이 진도성견의 질소균형에 미치는 영향

  • Kang, Tae-Il (College of Animal Bioscience & Technology, Konkuk University) ;
  • Maeng, Won-Jai (College of Animal Bioscience & Technology, Konkuk University) ;
  • Kim, Myeong-Hwa (College of Animal Bioscience & Technology, Konkuk University) ;
  • Lee, Sang-Rak (College of Animal Bioscience & Technology, Konkuk University)
  • 강태일 (건국대학교 동물생명과학대학) ;
  • 맹원재 (건국대학교 동물생명과학대학) ;
  • 김명화 (건국대학교 동물생명과학대학) ;
  • 이상락 (건국대학교 동물생명과학대학)
  • Received : 2008.12.18
  • Accepted : 2009.04.21
  • Published : 2009.04.01

Abstract

This study was conducted to determine the protein requirement level in adult Jindo dog (Korea Jindo Dog) through nitrogen balance experiments. 12 female dogs aged 36~38 weeks old (for early stage) or aged 45~49 weeks old (for late stage) were fed one of 3 diets containing 17, 19 and 21% of crude protein. Body weight of dogs were measured during the 12 days of feeding trial, and feces and urine were collected last 3 days of the trial period. In early stage of Jindo dog, average daily gain of dogs fed experimental diets containing 17, 19 and 21% of crude protein were -38.33, -16.25 and -12.71g/d, respectively. There was a significant differences between 17 and 21% of crude protein treatments (p<0.05) and calculated retained nitrogen were -0.29, -0.04 and -0.03g/kg$BW^{.75}$/d, respectively. In late stage of Jindo dog, average daily gain of dogs fed experimental diets containing 17, 19 and 21% of crude protein were -34.05, -28.71 and -28.28g/d, and calculated retained nitrogen were -0.33, -0.06 and 0.09g/kg$BW^{.75}$/d, respectively, and were significantly higher (p<0.05) in dogs fed 21% of crude protein diet than those of other dogs. In early stage and late stage of adult Jindo dog, a calculated linear regression equation for nitrogen intake (x) and nitrogen retention (y) were y = 0.7484x-1.18 ($R^2$ = 0.9923) and y = 0.88231x-1.0894 ($R^2$ = 0.9982) and the requirement of crude protein were estimated as 9.85g/kg$BW^{.75}$/d and 7.72g/kg$BW^{.75}$/d from above equation.

Keywords

Adult Jindo dog;Nitrogen balance;Protein level;Calculated linear regression equation

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