보고서 정보
주관연구기관 |
충북대학교 Chungbuk National University |
보고서유형 | 최종보고서 |
발행국가 | 대한민국 |
언어 |
한국어
|
발행년월 | 2015-03 |
과제시작연도 |
2014 |
주관부처 |
농촌진흥청 Rural Development Administration(RDA) |
등록번호 |
TRKO201500010293 |
과제고유번호 |
1395035199 |
사업명 |
친환경안전농축산물생산기술 |
DB 구축일자 |
2015-07-11
|
초록
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Ⅳ. 연구개발결과
○ 번식장애 발생 조사결과, 난산 11.5%, 후산정체 22.3%, 패혈성 자궁염 24.6%, 대사성질병 20.8%, 자궁내막염 24.8%, 난소낭종 20.3% 및 도태·폐사율 22%
○ 생체진단 자가진단 지표의 개발을 위한 자료의 분석결과, 난산(OR = 2.2), 패혈성 자궁염(OR = 2.0) 및 분만 후 8주 이내 번식주기 미재개(OR = 2.3)가 분만 후 180일 이내 임신율에 직접적으로 영향을 미침
○ 배란동기화 후 임신율에 영향을 미치는 요인은 산차 외에도 번식프로그램 개시시의 BCS
Ⅳ. 연구개발결과
○ 번식장애 발생 조사결과, 난산 11.5%, 후산정체 22.3%, 패혈성 자궁염 24.6%, 대사성질병 20.8%, 자궁내막염 24.8%, 난소낭종 20.3% 및 도태·폐사율 22%
○ 생체진단 자가진단 지표의 개발을 위한 자료의 분석결과, 난산(OR = 2.2), 패혈성 자궁염(OR = 2.0) 및 분만 후 8주 이내 번식주기 미재개(OR = 2.3)가 분만 후 180일 이내 임신율에 직접적으로 영향을 미침
○ 배란동기화 후 임신율에 영향을 미치는 요인은 산차 외에도 번식프로그램 개시시의 BCS, 수정 시기(계절) 및 개체의 공태기간이 임신율에 영향을 미침
○ NEFA 수준은 분만 1주전부터 크게 상승하여 분만 시에 피크를 이루었다가, 이후에는 지속적으로 감소되었으며, BHBA 농도는 분만 이후 크게 상승하였으며, 분만 후 2주에 피크를 이룬 뒤 점차 감소되었음
○ 케톤체 농도가 증가할수록 혈당, 총콜레스테롤은 감소하는 경향을 보였으며, 유리지방산(NEFA) 및 AST는 증가하는 경향을 나타냄
○ 임상형 케톤증에서 유리지방산(NEFA)이 분만 후 감소하였고, 총콜레스테롤은 급격히 상승하는 것으로 분석
Abstract
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The objectives of this study was to determine the incidence of postpartum disorders, reproductive performance, and some important biomarkers influencing reproductive performance in dairy cows. The incidence rates of dystocia, retained placenta, septicemic metritis, metabolic disorders (including mil
The objectives of this study was to determine the incidence of postpartum disorders, reproductive performance, and some important biomarkers influencing reproductive performance in dairy cows. The incidence rates of dystocia, retained placenta, septicemic metritis, metabolic disorders (including milk fever, ketosis, and abomasal displacement), endometritis (including pyometra), and ovarian cysts were 11.5%, 22.3%, 24.6%, 20.8%, 24.8%, and 20.3%, respectively. In addition, culling and death rates were 15.9% and 6.1%, respectively. Systemic treatment protocols for dairy cows with postpartum reproductive and metabolic disorders were implemented. Cows with retained placenta received 3-5 uterine bolus for a day or twice on alternate days, whereas cows with septicemic metritis were treated antibiotics (ceptiofur or ampicillin) and antipyretic for 3 days. Cows with ketosis were treated using propylene glycol orally and liver function enhancer injection for 3-5 days, and cows with milk fever were treated using calcium preparation and 20% dextrose for 1 or 2 days, whereas all cows with abomasal displacement had a surgery. Cows with endometritis or pyometra received one or two injections of PGF2α, or antiseptic (povidone iodine solution) or antibiotics infusion (cephapirin) into uterus, whereas cows with ovarian cysts were treated using GnRH preparation. As a result of reproductive management, 84.8% of cows were inseminated, and the median and mean (± SD) days from calving to first insemination were 86 and 92.5±33.7, respectively. Moreover, 75.0% of cows were pregnant, and the median and mean (± SD) days from calving to pregnancy were 144 and 150.0±73.6, respectively. The first insemination conception rate was 30.4%, whereas the mean (± SD) numbers of insemination per conception was 2.4±1.6. Serum concentration of NEFA increased dramatically from week 1 prepartum, peaked during calving, then decreased continuously, whereas concentration of BHBA increased dramatically after calving, peaked at week 2 postpartum, then decreased. When the concentration of keton body increased, the serum glucose and total cholesterol concentrations tended to decrease, whereas the concentrations of NEFA and AST tended to increase. In the clinical ketosis, the concentration of NEFA decreased after calving, however the concentration of total cholesterol increased sharply. The logistic regression analysis including variables such as, prepartum BCS, all the peripartum disorders, initiation of postpartum cyclicity within 8 weeks postpartum, and mean milk yield during the first 3 postpartum months, to determine risk factors on the pregnancy within 180 days postpartum revealed that dystocia (OR = 2.2), septicemic metritis (OR = 2.0), and failed initiation of postpartum cyclicity within 8 weeks postpartum (OR = 2.3) were selected as the biomarkers hindering the target of reproductive performance. In conclusion, these data including the occurrence of reproductive disorders, reproductive performance, blood metabolites, and selected biomarkers might be efficiently used for dairy cattle management.
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