Earticle

초록

영어

There is no doubt that global warming and climate change affect animal production and sustainability of livestock systems. High ambient temperature and humidity have detrimental effects on the performance of laying hens. The aim of this study was to evaluate the influence of cyclic temperatures on the performance and egg quality of laying hens during the summer in Korea. A total of 1028 Hy-Line Brown layers were reared in the open floor house and exposed to a 24 hr linear temperature cycle ranging from 21.7 to 33.0℃ . Feed intake significantly decreased and cracked eggs increased under high ambient temperature or high THI (Temperature Humidity Index). Egg production was decreased gradually from 21 to 29℃ or from 21 to 26 THI. On the other hens, it was increased above 30℃ or 27 THI rather than decreased. High ambient temperature has no important impact on dirty eggs and mortality in this study. We believe that present data contribute to predict the effect of thermal conditions on the performance of laying hens by using ambient temperature or THI.

목차

ABSTRACT
 Ⅰ. 서론
 Ⅱ. 재료 및 방법
  1. 공시동물 및 사육시설
  2. 조사항목 및 조사방법
  3. 통계분석
 Ⅲ. 결과 및 고찰
 Ⅳ. 요약
 Ⅴ. REFERENCES

저자

• 천시내 [ Si-Nae Cheon | 경상대학교 대학원 응용생명과학부, 농촌진흥청 국립축산과학원 축산환경과 ]
• 이준엽 [ Jun-Yeob Lee | 농촌진흥청 국립축산과학원 축산환경과 ]
• 전중환 [ Jung-Hwan Jeon | 농촌진흥청 국립축산과학원 축산환경과 ] Corresponding author

참고문헌