Seasonal changes in productive and reproductive performance in holstein dairy cows synchronized for estrus with the ovsynch protocol under subtropical conditions
العناوين الأخرى
التغيرات المناخية في الأداء الإنتاجي و التناسلي لأبقار الهولستين الحلابة المعاملة ببرنامج ال Ovsynch في الظروف تحت الاستوائية
المؤلفون المشاركون
Mahdi, Ahmad al-Tahir
Shaban, Muhammad Muhammad
Rashad, Amr Muhammad
al-Zarqwni, Samir Zaki
Hasan, Jamal al-Din Abd al-Rahim
المصدر
Journal of King Abdul Aziz University : Meteorology, Environment and Arid land Agriculture Sciences
العدد
المجلد 26، العدد 2 (31 ديسمبر/كانون الأول 2016)، ص ص. 41-50، 10ص.
الناشر
جامعة الملك عبد العزيز مركز النشر العلمي
تاريخ النشر
2016-12-31
دولة النشر
السعودية
عدد الصفحات
10
التخصصات الرئيسية
الملخص EN
This study aimed to evaluate the effects of heat stress on productive and reproductive performances in Holstein dairy cows during summer compared to winter seasons.
During each seasons, temperature– humidity index (THI), rectal temperature, and respiration rate were recorded for 105 days.
Daily milk yield (Kg/day) was recorded for 5 consecutive months each season.
Serum cholesterol, glucose, urea and progesterone (P4) concentrations were determined around the times of inseminations.
Conception rate to first insemination (CR/AI), overall pregnancy rate, number of services per conception (NSPC) and number of days open (DO) were determined each season.
Values of THI, rectal temperatures and respiration rate were greater in summer than winter.
Daily milk yield was greater (P<0.05) in winter months compared to summer.
Serum glucose and urea concentrations were greater in summer than winter during the dry period and at the times of GnRH and PGF injections.
However, cholesterol was greater in winter during GnRH and PGF injection times.
Serum P4 concentrations were not affected by GnRH treatment in summer, whereas GnRH injection increased P4 concentration during winter season.
More winter cows conceived to first AI and required less number of services per conception and had fewer days open compared to summer cows
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Shaban, Muhammad Muhammad& Rashad, Amr Muhammad& Mahdi, Ahmad al-Tahir& al-Zarqwni, Samir Zaki& Hasan, Jamal al-Din Abd al-Rahim. 2016. Seasonal changes in productive and reproductive performance in holstein dairy cows synchronized for estrus with the ovsynch protocol under subtropical conditions. Journal of King Abdul Aziz University : Meteorology, Environment and Arid land Agriculture Sciences،Vol. 26, no. 2, pp.41-50.
https://search.emarefa.net/detail/BIM-903974
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Shaban, Muhammad Muhammad…[et al.]. Seasonal changes in productive and reproductive performance in holstein dairy cows synchronized for estrus with the ovsynch protocol under subtropical conditions. Journal of King Abdul Aziz University : Meteorology, Environment and Arid land Agriculture Sciences Vol. 26, no. 2 (2016), pp.41-50.
https://search.emarefa.net/detail/BIM-903974
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Shaban, Muhammad Muhammad& Rashad, Amr Muhammad& Mahdi, Ahmad al-Tahir& al-Zarqwni, Samir Zaki& Hasan, Jamal al-Din Abd al-Rahim. Seasonal changes in productive and reproductive performance in holstein dairy cows synchronized for estrus with the ovsynch protocol under subtropical conditions. Journal of King Abdul Aziz University : Meteorology, Environment and Arid land Agriculture Sciences. 2016. Vol. 26, no. 2, pp.41-50.
https://search.emarefa.net/detail/BIM-903974
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references : p. 48-49
رقم السجل
BIM-903974
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر