Effect of heat stress on growth performance and physiological changes of pigs in commercial farm

고온스트레스가 일반 양돈농가의 돼지 생산성 및 생리 변화에 미치는 영향

  • 오서영 (농촌진흥청 국립축산과학원) ;
  • 정용대 (농촌진흥청 국립축산과학원) ;
  • 김두완 (농촌진흥청 국립축산과학원) ;
  • 민예진 (농촌진흥청 국립축산과학원) ;
  • 유동조 (농촌진흥청 국립축산과학원) ;
  • 김기현 (농촌진흥청 국립축산과학원) ;
  • 김영화 (농촌진흥청 국립축산과학원)
  • Received : 2017.05.01
  • Accepted : 2017.07.07
  • Published : 2017.07.31


This study investigated the effect of heat stress on the performance and blood characteristics in commercial pig farms. A total of 180 growing pigs and 180 finishing pigs were assigned to two treatments consisting of thermal-neutral period(TNP) and high-temperature period(HTP) with three replications in floor pen, respectively. Feeding trials in the TNP and HTP were individually performed in autumn and summer seasons, respectively. Temperature-humidity index(THI) was calculated by temperature and humidity. Performance and physiological responses were identified per growth stages and feeding trial. Average temperature and THI were $16.8^{\circ}C$ and 61.4 at the TNP, and $25^{\circ}C$ and 74.3 at the HTP, respectively. Growing pigs in HTP exhibited lower BW, ADG and ADFI than in TNP(p<0.01). Similarly, finishing pigs showed lower growth parameters in HTP than in TNP(p<0.01). Lymphocytes and neutrophils of growing pigs were lower in HTP than in TNP(p<0.05). The serum T-PRO and NEFA in finishing pigs were higher in HTP than in TNP(p<0.05). In HTP, finishing pigs had higher cortisol levels than in TNP. Therefore, HTP can negatively influence growth performance and nutritional metabolism in pigs. Our results may provide useful information for developing feeding programs and diets to control heat stress for swine farms.


Blood characteristic;Commercial farm;Heat stress;Performance;Pigs


Grant : 하절기 돼지 성장단계별 생산성 향상 기술개발

Supported by : 농촌진흥청, 국립축산과학원


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