환경온도와 우모피복도가 닭의 에너지대사에 미치는 영향 1 . 절식시 열발생량 = Effect of Environmental Temperature and Defeathering on Energy Metabolism in Cockerels 1 . Fasting heat production

다국어 초록 (Multilingual Abstract)

Effect of environmental temperature and defeathering (DF) on the fasting heat production (FHP) in white Hisex cockerels was examined at 5, 15, 25 and 35℃ of temperature and 0, 50 and 100% defeathering conditions. Series of experiment were carried out with three open-circuit respiration chamber. The results can be summarized as follows: 1. FHP had negative correlation with the environmental temperature (ET), therefore, FHP of cockerels decreased continually with increasing ET. The relationships between FHP (Y) and ET (X) expressed as a linear regression equation were: Control treatment (0% DF); Y=-1,167X + 100.41 (r=0.9779), 50% DF treatment; Y=-1.429X + 109.90 (r=0.9968), 100% DF treatment; Y=-2.887X + 165.31 (r=9717). 2. FHP of the cockerels was also increased (p$lt;.01) with increasing DF level, which were 105.5%increase in 50% DF treatment and 139.5% increase in 100% DF treatment compared to control treatment (0% DF treatment). The tendency of increasing FHP due to DF level (50 and 100% DF) was remarkable especially in low temperature treatment (15 and 25℃). However, there was no effect of the DF level of cookerels when ET increased with 35℃, which of FHP ranged 58.3-60.6 Kca1/BW^(0.75)/day.