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KMID : 1025520090510020155
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Journal of Animal Science and Technology
2009 Volume.51 No. 2 p.155 ~ p.162
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Effects of Crude Protein Levels on Nitrogen Balance in Adult Jindo Dog
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Kang Tae-Il
Maeng Won-Jai
Kim Myeong-Hwa
Lee Sang-Rak
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Abstract
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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/kgBW.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/kgBW.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(R2=0.9923) and y=0.88231x－1.0894(R2=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.
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KEYWORD
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Adult Jindo dog, Nitrogen balance, Protein Level, Calculated Linear regression equation
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