Earticle

초록

영어

Effective estrus detection and artificial insemination (AI) are necessary for profitable management of dairy herd. In current study, 45 crossbred lactating cows have been selected with the complaint of unobserved oestrus for more than sixty days postpartum. All cows had functional corpus luteum as examined by transrectal ultrasonography. Cows were treated with PGF2α analogue and AI was performed with observed oestrus and then single dose of GnRH was administered. Similar synchronization protocol has been repeated after 14 days in cows that did not repose to first treatment. Remaining cows received additional PGF2α after 14 days of second treatment and timed AI was performed following GnRH administration. Among 45 cows, 28.89% showed estrus after first treatment and 78.79% responded to second hormonal intervention. A higher conception rate (88.89% vs 26.66 and 72.72%) was observed in cows after triple administration of PGF2α and timed AI. We noticed a significant differences in body condition score (BCS, 1～5 scale), postpartum period, and daily milk production between cows that either responded of non-responded following first and second hormonal treatment. In addition, there was a significant positive correlation between daily milk production and BCS, age and postpartum days, milk production and estrus/BCS, and milk production/BCS/estrus and conception rate. Depending upon the findings we conclude that hormonal intervention with PGF2α and GnRH enhances postpartum ovarian cyclicity and help decreasing the days open of dairy herd. Therefore, this finding might provide an excellent guideline for target breeding system for profitable dairy herd management.

목차

ABSTRACT
 INTRODUCTION
 MATERIALS AND METHODS
  Animal Selection and Management
  Examination of Genital Organs of Cows by Ultrasonography
  Treatment Protocol and Artificial Insemination (AI)
  Pregnancy Diagnosis
  Statistical Analysis
 RESULTS
  Effect of Different Treatments on Postpartum Anoestrus Cows
  Difference between Different Parameters of Cows Respondedto Treatments
  Correlation among Different Parameters considered inThis Study
 DISCUSSIONS
 REFERENCES

키워드

저자

• Md. Parvez Kabir [ Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh ]
• Md. Rashedul Islam [ Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh, 2Department of Surgery and Theriogenology, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh ]
• Abdulla Al Maruf [ Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh ]
• Mohammed Shamsuddin [ Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh ]
• Farida Yeasmin Bari [ Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh ]
• Nasrin Sultana Juyena [ Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh ]
• Md Saidur Rahman [ Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh, Department of Animal Science and Technology, Chung-Ang University, Anseong 456-756, Republic of Korea. ] Corresponding author

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발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  Reproductive & developmental biology

• 간기

  계간

• pISSN

  1738-2432

• eISSN

  2288-0151

• 수록기간

  1977~2018

• 십진분류

  KDC 527 DDC 636