Korean Journal of Veterinary Research (대한수의학회지)
- Volume 40 Issue 2
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- Pages.383-391
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- 2000
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- 2466-1384(pISSN)
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- 2466-1392(eISSN)
Studies on health management and nutritional evaluation by milk components analysis in dairy cows III. Relationship between conception rates, and milk urea nitrogen and milk protein concentration in a large dairy herd of high yielding cows
젖소에서 유성분 분석을 통한 영양상태 평가 및 건강관리에 관한 연구 III. 고능력우 위주의 대규모 목장에서 우유중 단백질과 요소태질소 수준이 수태율에 미치는 영향
- Moon, Jin-san (National Veterinary Research and Qurantine Service, MAF) ;
- Joo, Yi-seok (National Veterinary Research and Qurantine Service, MAF) ;
- Jang, Gum-chan (National Veterinary Research and Qurantine Service, MAF) ;
- Yoon, Yong-dhuk (National Veterinary Research and Qurantine Service, MAF) ;
- Lee, Bo-kyeun (Agribrands Purina Korea Inc.) ;
- Park, Young-ho (College of Veterinary Medicine, Seoul National University) ;
- Son, Chang-ho (College of Veterinary Medicine, Chonnam National University)
- 문진산 (국립수의과학검역원) ;
- 주이석 (국립수의과학검역원) ;
- 장금찬 (국립수의과학검역원) ;
- 윤용덕 (국립수의과학검역원) ;
- 이보균 ((주)퓨리나코리아) ;
- 박용호 (서울대학교 수의과대학) ;
- 손창호 (전남대학교 수의과대학)
- Accepted : 2000.04.28
- Published : 2000.06.25
Abstract
Milk urea nitrogen (MUN) determination is being used an indicator of the protein-energy balance in dairy herds. A faulty balance can be corrected to optimize milk production and animal health. This parameter is regarded as a potential tool to evaluate suboptimal feeding practices and reproductive disorders. Therefore, the purpose of this study was to investigate the response of milk composition by regular feeding analysis and to compared the relationship between MUN and milk protein(MP) and fertility at the insemination period in Holstein dairy cows. Total of 355 artificial insemination (AI) for 150 Holstein cows in the herd were used to examine the relationship between MUN and MP content and conception rate. The AI occured for the cows 50 to 150 day in milk, and MUN and MP concentration were determined using automated infrared procedures. The mean