Earticle

초록

영어

Background: Dairy cows exposed to heat stress have reduced milk production, milk quality, and conception rates, leading to lower profits. This study was conducted to analyze the effect of heat stress according to Temperature-Humidity Index (THI) on the milk production of Korean Holstein cows. Methods: Monthly maximum temperature and average relative humidity data from January 2017 to August 2024 were obtained from 62 observation points used by the Korea Meteorological Administration to calculate the national average. Using this data, the THI, a key indicator for assessing heat stress in Korean Holstein cows, was calculated. Additionally, data from 240,088 Korean Holstein cows, collected through tests conducted by the Dairy Cattle Improvement Center of the NH-Agri Business Group, were analyzed. Results: Comparative analysis of the relationship between THI and milk production revealed that milk yield remained relatively stable until THI reached the “very severe” heat stress threshold (THI ≥ 79). Beyond this level, milk production showed a tendency to decline. Conversely, when THI dropped below this threshold, milk yield tended to recover. Notably, the temperature in September, typically considered part of the autumn season, has been rising in recent years, with THI values now approaching the very severe stress level (THI ≥ 79). Conclusions: These findings suggest that establishing an appropriate farm environment and implementing systematic THI management are essential for mitigating the decline in milk production, as well as the associated economic losses, caused by rising domestic temperatures due to global warming.

목차

ABSTRACT
INTRODUCTION
MATERIALS AND METHODS
Milk production and economic data
Temperature-humidity index
Statistical analysis
RESULTS
DISCUSSION
CONCLUSION
REFERENCES

키워드

저자

• Jongil Jeong [ Department of Animal Science, Chonnam National University, Gwangju 61186, Korea ]
• Seokhyun Lee [ Dairy Cattle Improvement Center of NH-Agree Business Group, NACF, Goyang 10292, Korea ]
• Kwi-ryong Park [ Department of Dairy Cow Improvement, Korea Animal Improvement Association, Seoul 06668, Korea ]
• Jisu Kim [ Department of Animal Science, Chonnam National University/ARIF Inc., Naju 58307, Korea ]
• Mirae Kim [ Department of Animal Science, Chonnam National University/ARIF Inc., Naju 58307, Korea ]
• Hyeonho Lee [ Department of Animal Science, Chonnam National University/ARIF Inc., Naju 58307, Korea ]
• [ Minji Seo | Department of Animal Science, Chonnam National University/ARIF Inc., Naju 58307, Korea ]
• Jiyeon Han [ Department of Animal Science, Chonnam National University/Fertility Lab., Choisang Clinic, Seoul 06607, Korea ]
• Gyeonglim Ryu [ Dairy Science Division, National Institute of Animal Science, Cheonan 31000, Korea ] Corresponding Author
• Daehyun Kim [ Department of Animal Science, Chonnam National University/ARIF Inc., Naju 58307, Korea ] Corresponding Author

참고문헌

발행기관

간행물

관심저널 등록

• 간행물명

  Journal of Animal Reproduction and Biotechnology

• 간기

  계간

• pISSN

  2671-4639

• eISSN

  2671-4663

• 수록기간

  2019~2026

• 십진분류

  KDC 527 DDC 636