갑상선 호르몬의 경구투여가 육계의 사양성적, 체조성, 혈청 호르몬 농도 및 에너지 대사에 미치는 영향

Effect of Dietary Thyroid Hormone on Growth Performance, Body Composition, Serum Thyroid Hormone Concentration and Energy Metabolism of Broiler Chicks

  • 가천흥 (강원대학교 동물자원과학대학) ;
  • 김창혁 (강원대학교 동물자원공동연구소) ;
  • 채병조 (강원대학교 동물자원과학대학) ;
  • 이영철 (강원대학교 동물자원과학대학)
  • 발행 : 1999.12.01

초록

This study was conducted to investigate the effect of dietary thyroid hormone (T$_3$and T$_4$) on growth, feed conversion ratio and serum T$_3$or T$_4$concentration of broiler chicks. Zero to six week-old broiler chicks were randomly allocated into seven treatment groups for feeding trials with three replication : control, T$_3$(0.1), T$_3$(1.0), T$_3$(5.0), T$_4$(0.1), T$_4$(1.0), T$_4$(5.0) ppm group. Concentrations of T$_3$and T$_4$in serum were analyzed. The weight gain of T$_3$(1.0), T$_3$(5.0) and T$_4$(5.0) groups were significantly lower than that of control. No statistically significant adverse effect was observed in other groups (p〉0.05). Feed intake was significantly lower in T$_3$(0.1, 1.0 and 5.0) and T$_4$(5.0) than in control group (p〈0.05), and the feed conversion ratio had a similar trend to the feed intake change. The contents of liquid and abdominal fat pad in carcass were significantly decreased in all T$_3$and T$_4$groups (p〈0.05). T$_3$and T$_4$concentration in serum was significantly increased at over 1.0ppm of the hormone supplementation level. As T$_3$addition level increased, T$_4$concentration in serum reduced ; however, T$_3$in serum was directly proportional during fasted were slightly increased when T$_3$or T$_4$was added to broiler diets.

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