초록
본 실험은 한우 번식장애우와 저수태우의 혈액 성분 및 성선호르몬(estrogen과 progesterone)의 농도를 비교 분석하여 번식우의 기초적인 생리지표를 확립시키는데 있다. 본 실험의 결과를 요약하면 다음과 같다. 1. 저수태 한우와 번식장애우 혈중 albumin, BUN, Ca, cholesterol, creatine, glucose, phosphorous, total protein 및 triglyceride 함량은 3.28$\pm$0.05 와 3.27$\pm$0.04 g/㎗, 11.07$\pm$0.61와 12.69$\pm$0.88 mg/㎗, 9.98$\pm$0.10와 9.56$\pm$0.11mg/㎗, 105.75$\pm$3.57와 126.78$\pm$5.66 mg/㎗, 1.62$\pm$0.05와 1.65$\pm$0.09 mg/㎗, 67.46$\pm$3.07와 76.97$\pm$3.76 mg/㎗, 6.13$\pm$0.36 와 6.11$\pm$0.26 mg/㎗, 5.82$\pm$0.08와 6.18$\pm$0.08 g/㎗ 및 12.82$\pm$1.46와 15.19$\pm$1.61 mg/㎗으로 나타났다. 2. 혈청의 중요한 성분중 하나인 요소태 질소, 칼슘 및 인의 함량이 번식 장애우와 저수태우의 경우 정상우보다 다소 높은 경향을 나타냈으며, 특히 콜레스테롤의 함량이 번식 장애우와 저수태우의 경우 정상우의 약 2배정도 현저히 높은 성적을 나타냈다. 3. 발정주기중 혈액내 progesterone 수준은 임신우와 비임신우에서 수정후 18일까지는 비슷한 수준(6.55$\pm$0.17, 5.46$\pm$0.18 ng/$m\ell$)을 보였으나 그 후 임신우에서는 점차 증가하였고 비임신우에서는 발정일 (0.18$\pm$0.03 ng/$m\ell$)에 급감하였다. 4. 번식 장애우와 저수태우의 혈중 estrogen과 progesterone 함량은 각각 57.42$\pm$5.03, 56.76$\pm$8.73 pg/$m\ell$과 6.26$\pm$0.83 ng/$m\ell$, 9.41$\pm$1.85 ng/$m\ell$으로서, 혈중 progesterone 농도가 정상우의 황체기 수준으로 유지되어 발정발현과 수태가 억제되는 것으로 나타났다.
Blood chemical values and sex steroid hormone concentration of repeat breeder and reproductive disorder in Hanwoo, which were bred in Chunchon areas, were examine to establish the basic physiological maker. The concentrations of albumin, blood urea nitrogen(BUN), calcium(Ca), cholesterol, creatinine, glucose, phosphorous, total protein and triglycerides in repeat breeder and reproductive disorder were 3.28$\pm$0.05 and 3.27$\pm$0.04 g/㎗, 11.07$\pm$0.61 and 12.69$\pm$0.88 mg/㎗, 9.98$\pm$0.10 and 9.56$\pm$0.11mg/㎗, 105.75$\pm$3.57 and 126.78$\pm$5.66mg/㎗, 1.62$\pm$0.05 and 1.65$\pm$0.09 mg/㎗, 67.46$\pm$9.07 and 76.97$\pm$3.76mg/㎗, 6.13$\pm$0.36 and 6.11$\pm$0.26mg/㎗, 5.82$\pm$0.08 and 6.18$\pm$0.08 g/㎗ , 12.82$\pm$1.46 and 15.19$\pm$1.61mg/㎗, respectively. Among the blood chemical values, Ca, cholesterol and inorganic phosphorous levels in repeat breeder and reproductive disorder were slightly higher than those in normal cows. The progesterone levels of pregnancy(0.18~6.56 ng/$m\ell$) and non-pregnancy(0.15~5.46ng/$m\ell$) cows at estrus cycle were showed similar trends from 0 day to 18 days. Those of pregnancy cows were increased gradually from 18 days to 180 days(5.90~7.51 ng/$m\ell$), while those of non-pregnancy cows were dramatically drop at 21 days (0.18$\pm$0.03mg/㎗). The concentrations of estrogen and progesterone in repeat breeder and reproductive disorder were 57.42$\pm$5.03, 56.76$\pm$8.73 pg/$m\ell$ and 6.26$\pm$0.83, 9.41$\pm$1.85 ng/$m\ell$ . respectively. These results indicate that blood chemical values in repeat breeder and reproductive disorder were not greatly difference in normal cows except for Ca, cholesterol, BUN and inorganic phosphorous. Since the progesterone levels in repeat breeder and reproductive disorder was maintained to the luteal phase levels of normal cows, it may cause of failing of conception and next estrus cycle.
