| Improvement of reproductive performance by the application of reproductive herd health program in high yielding dairy herds |
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Kyung-Soo Rho1, Ui-Hyung Kim1, Hyun-Wook Nam1, Guk-Hyun Suh2, Hyun-Gu Kang1, Ill-Hwa Kim1 |
1College of Veterinary Medicine, Chungbuk National University
2National Livestock Research Institute, RDA |
| 고능력 젖소 축군의 집단번식관리프로그램 적용에 의한 번식효율의 개선 |
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노경수1, 김의형1, 남현욱1, 서국현2, 강현구1, 김일화1 |
1충북대학교 수의과대학
2농촌진흥청 축산연구소 |
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| Abstract |
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We investigated the effect of reproductive herd health program (RHHP) on the reproductive performance in high yielding dairy herds. Data collected from 205 lactations at Boeun County, Chungbuk from April 2001 to Dec. 2003 included postpartum reproductive and metabolic diseases, body condition score (BCS), reproductive performance and milking records. First we compared the reproductive performance of cows without RHHP (pre-RHHP group) and cows with RHHP (RHHP group). Intervals from calving to first service (99.6 vs. 81.8 days) and to conception (160.3 vs. 131.8 days) were shorter in the RHHP group than in the pre-RHHP group. Secondly, we determined the effect of milk yield (305 days) on the occurrence of postpartum diseases, BCS changes, and reproductive performance in cows under RHHP. The occurrence of metritis and metabolic diseases were greater in the over-10,000 kg group than in the under-10,000 kg group. The over-10,000 kg group lost more body condition than the under-10,000 kg group from calving to month 3 postpartum. Nevertheless, reproductive performance did not differ between the two groups. These results indicate that reproductive performance can be improved by the application of RHHP in high yielding dairy herds and that reproductive performance in the cows under RHHP are not affected by high milk yielding. |
| Key Words:
reproductive herd health program, milk yield, reproductive performance, dairy cows |
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