Journal of Embryo Transfer (한국수정란이식학회지)

The Korean Society of Embryo Transfer (한국수정란이식학회)
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Relationship between Body Condition Score (BCS), Blood Urea Nitrogen(BUN) Concentration and Estrous Expression in Holstein Cows

젖소의 신체충실지수(BCS), 혈장요소태질소(BUN) 수준과 발정 발현과의 관계

  • Son, J.K. (Dairy Cattle Research Division, National Livestock Research Institute, RDA) ;
  • Park, S.B. (Dairy Cattle Research Division, National Livestock Research Institute, RDA) ;
  • Park, S.J. (Dairy Cattle Research Division, National Livestock Research Institute, RDA) ;
  • Baek, K.S. (Dairy Cattle Research Division, National Livestock Research Institute, RDA) ;
  • Ahn, B.S. (Dairy Cattle Research Division, National Livestock Research Institute, RDA) ;
  • Kim, H.S. (Dairy Cattle Research Division, National Livestock Research Institute, RDA) ;
  • Hwang, S.J. (Dairy Cattle Research Division, National Livestock Research Institute, RDA) ;
  • Park, C.K. (College of Animal Life Sciences, Kangwon National University)
  • 손준규 (농촌진흥청 축산연구소 낙농과) ;
  • 박수봉 (농촌진흥청 축산연구소 낙농과) ;
  • 박성재 (농촌진흥청 축산연구소 낙농과) ;
  • 백광수 (농촌진흥청 축산연구소 낙농과) ;
  • 안병석 (농촌진흥청 축산연구소 낙농과) ;
  • 김현섭 (농촌진흥청 축산연구소 낙농과) ;
  • 황석주 (농촌진흥청 축산연구소 낙농과) ;
  • 박춘근 (강원대학교 동물생명과학대학)
  • Published : 2007.03.31
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Abstract

The objective of this study was to investigate the relationship between body condition score (BCS), blood urea nitrogen (BUN) and estrous expression for the purpose of improving reproductive performance. In total, 37 ovulations and 28 estrous detection were observed among 51 Holstein-Friesian dairy cows. The estrous inducement rate and estrous expression rate were significantly lower for cows with BCS below 2.0 than for cows with BCS above 2.0. There was 0% of rate of standing heat in cows with BCS below 2.0 whereas the rate of standing heat was markedly increased in cows with BCS above 2.0 (46.7% and 64.7% for BCS $2.0{\sim}2.49$ and BCS $2.5{\sim}3.0$ cows, respectively). The estrous expression rate was significantly lower for cows with BUN below 10mg/dl than for cows with BUN above 10mg/dl. There was no significant difference among duration time of estrus, estrous behavior patterns and BUN concentration. The rate of estrous expression and concentration of BUN was not significantly different between primiparous and multiparous cows. This result shows that the level of BCS and BUN affect the estrous expression. Considering the situation that estrous expression is decreased in recent years, effective nutritional management should be accompanied to improve reproductive performance.

본 연구는 번식 효율 증진을 위해 BCS, BUN과 발정 발현과의 관계를 조사하였으며, 공시된 홀스타인 젖소 51두 중 37두에서 배란 및 28두에서 발정 발현을 확인하였다. 발정 유기율에서 BCS $2.0{\sim}2.49$와 $2.5{\sim}3.0$인 우군에서는 각각 78.9% 및 73.9%인 반면 2.0 미만인 우군에서는 55.6%로 유의적인(p<0.05)차이를 보였으며, 발정 발현율과 승가 허용율에서도 BCS $2.0{\sim}2.49$인 우군에서 각각 73.3% 및 46.7%이고 BCS $2.5{\sim}3.0$인 우군은 각각 88.2% 및 64.7%를 보인 반면 BCS 2.0 미만인 우군에서는 각각 40% 및 0%로 BCS 2.0 이상인 우군에 비해 유의적(p<0.05)으로 낮게 나타났다. 발정 동기화 우군의 BUN과 발정 발현율과의 관계에서 BUN 수준이 10mg/dl 이상인 우군에서 85.7%의 발정 발현율를 보인 반면 10 mg/dl 이하인 우군에서는 52.1%로 유의적으로(p<0.05) 낮게 나타났다. 발정 행동별(외음부 냄새 맡기, 턱비빔, 승가 및 승가 허용) BUN 수준에 있어서는 영향을 미치지 않는 것으로 나타났다. 발정 발현율과 BUN 수준은 초산우와 2산 이상우 사이에서 유의적인 차이를 보이지 않았다. 본 연구의 결과 BCS와 BUN 수준이 낮으면 발정 발현에 영향을 미치는 것을 알 수 있다. 발정 발현율이 점차 떨어지고 있는 현 시점에서 효율적인 영양관리가 뒷받침되어야 번식 효율이 향상될 것으로 생각된다.

Keywords

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