Abstract
The respiratory experiment was made on laying hen fed acclimented to three temperatures of 10, 20, and 30$^{\circ}C$. 1. The FHP of laying hen decreased with increasing room temperature. 2. The feed intake and heat production(HP) all decreased with increasing temperature. However, the highest energy retention was found with optimum temperature (20$^{\circ}C$). 3, The MEm's were 128,110, and 110kcalkg 0.75 for the 10, 20, and 30$^{\circ}C$ of room temperature. The NAME's were 64,78, and 69 percent for the respective room temperature. The results indicated that the highest NAME was obtained with optimum temperature(20$^{\circ}C$). 4. Although there was no significant difference in the nitrogen retention(NR) at different temperatures, the NR was maximum at the optimum temperature(20$^{\circ}C$). 5. The experimental results suggest that in the Bone of thermal neutrality under cooler and hotter conditions heat loss is more dependent on the environmental temperature.
환경온도를 10, 20, 3$0^{\circ}C$로 처리할 때 산란계의 에너지 및 질소대사를 측정한 결과는 다음의 성적을 얻었다. 1) 산란계의 절식시열발생량(FHP)는 실온이 10, 20, 3$0^{\circ}C$로 상승함과 더불어 대사체중당 각각 89, 68, 52Kcal로 유의적으로 떨어지는 경향을 나타냈다. 2) 실온이 10, 20, 3$0^{\circ}C$로 상승함에 따라 사료섭취량은 109g, 101g, 79g 또 ME섭취량은 228, 203, 161Kcal로 점차 감소하는 경향을 보였다. 3) 실온이 10, 20, 3$0^{\circ}C$로 상승함에 따라 HP는 163, 130, 120Kcal로 감소하는 경향을 보이며 에너지축적(ER)은 64, 72, 41Kcal로 감소하였다. 4) 유지를 위한 ME요구량(MEm)은 실온 10, 20, 3$0^{\circ}C$에 있어 각각 128, 110, 110Kcal로 특히 저온일 때 MEm이 증가하고 있다. 또한 ME의 정미이용효율(NAME)은 각실온에서 64, 78, 69%를 보여 적온인 2$0^{\circ}C$에서 가장 높은 값을 나타내었다.