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韓牛 繁殖 效率에 대한 Blood Urea Nitrogen과 Body Condition Score의 影響 원문보기
Blood urea nitrogen and body condition score on reproductive efficiency in Korean cattle

  • 저자

    정영훈

  • 학위수여기관

    慶尙大學校 大學院

  • 학위구분

    국내석사

  • 학과

    수의학과

  • 지도교수

  • 발행년도

    2004

  • 총페이지

    vi, 44p.

  • 키워드

    한우 번식효율 수의학;

  • 언어

    kor

  • 원문 URL

    http://www.riss.kr/link?id=T10060234&outLink=K  

  • 초록

    The environmental impact of nutrient waste from agriculture has become an area of concern as ways to produce more food and offspring. In dairy cattle, as the genetic capacity for milk production has increased, decreased fertility has become a severe problem by feeding high dietary protein, resulting in high concentration of blood urea nitrogen (BUN). There are numerous reports on BUN which is associated with reduced conception rates and closely related to body condition score (BCS) in lactating cattle, but not in Korean native cattle. This study was therefore performed to investigate the relation of BUN to both BCS and conception rates in Korean cattle. In addition, to verify the effective method on estrus detection, KAMAR was compared to observation of estrus. For the estrus induction, the cattle were treated with combinations of PGF_(2)α and GnRH, called as an Ovsynch program, and inseminated into the estrus synchronized cattle artificially with frozen semen. A total of 587 female Korean cattle (2∼5 years) in Daewanryong were used for this experiment. Feeding condition divided into two groups depending on grazing and darn feeding period. In grazing period, the mixture of Timothy, Orchard grass and Tall fescue, and concentrates (2.5 kg/day) was fed whereas hay (6.5 kg/day) and corn silage (20 kg/day) were fed while barn feeding period. The use of KAMAR for estrus detection showed significantly (p


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