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Calving interval and affecting factors in Shami cattle

الفترة بين الولادتين في الأبقار الشامية و العوامل المؤثرة فيها

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 Publication date 2013
and research's language is العربية
 Created by Shamra Editor




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This research was conducted I during 2009-2010 at Dier Alhajar station, General Commission for Scientific Agricultural Research to determine the length of calving interval (CI) and the effect of sire, calving year, calving season, parity and age of cow and their interactions in Shami Cattle. It was concluded that CI can be reduced by better management and providing good and suitable feeding conditions.


Artificial intelligence review:
Research summary
نفذ البحث خلال عامي 2009 و2010 في محطة بحوث دير الحجر التابعة للهيئة العامة للبحوث العلمية الزراعية في سوريا، بهدف تحديد طول الفترة بين الولادتين في الأبقار الشامية ودراسة تأثير الأب، وسنة الولادة، وفصل الولادة، والموسم الإنتاجي، وعمر البقرة عند الولادة. استخدم الباحثون 2714 سجلاً تكاثلياً لـــ 738 بقرة شامية جمعت بين عامي 1985 و2008. أظهرت النتائج أن متوسط الفترة بين الولادتين بلغ 433.61 يوماً، مع تأثير معنوي لسنة الولادة وتداخلها مع فصل الولادة والموسم الإنتاجي، في حين لم يكن للأب والعوامل الأخرى تأثير معنوي. استنتج الباحثون أن تحسين الظروف البيئية والإدارية يمكن أن يساهم في تقصير الفترة بين الولادتين وزيادة الكفاءة الإنتاجية والتناسلية للأبقار الشامية.
Critical review
دراسة نقدية: البحث قدم معلومات قيمة حول الفترة بين الولادتين في الأبقار الشامية والعوامل المؤثرة فيها. ومع ذلك، يمكن الإشارة إلى بعض النقاط التي قد تعزز من جودة البحث. أولاً، كان من الممكن توسيع نطاق الدراسة ليشمل مناطق أخرى غير دير الحجر للحصول على نتائج أكثر شمولية. ثانياً، لم يتم التطرق بشكل كافٍ إلى تأثير العوامل الوراثية بشكل مفصل، وهو ما قد يكون له تأثير كبير على النتائج. أخيراً، كان من الممكن استخدام تقنيات تحليل بيانات أكثر حداثة للحصول على نتائج أكثر دقة.
Questions related to the research
  1. ما هو الهدف الرئيسي من الدراسة؟

    الهدف الرئيسي من الدراسة هو تحديد طول الفترة بين الولادتين في الأبقار الشامية ودراسة تأثير العوامل المختلفة مثل الأب، وسنة الولادة، وفصل الولادة، والموسم الإنتاجي، وعمر البقرة عند الولادة.

  2. ما هي العوامل التي أظهرت تأثيراً معنوياً على طول الفترة بين الولادتين؟

    أظهرت النتائج أن سنة الولادة وتداخلها مع فصل الولادة والموسم الإنتاجي كان لها تأثير معنوي على طول الفترة بين الولادتين.

  3. ما هو متوسط طول الفترة بين الولادتين الذي توصلت إليه الدراسة؟

    متوسط طول الفترة بين الولادتين بلغ 433.61 يوماً.

  4. ما هي التوصيات التي قدمها الباحثون لتحسين الكفاءة الإنتاجية والتناسلية للأبقار الشامية؟

    أوصى الباحثون بتحسين الظروف البيئية والإدارية، وتأمين كميات كافية ونوعيات مناسبة من الأعلاف على مدار العام، والاستقرار في إدارة القطيع لتقصير الفترة بين الولادتين وزيادة الكفاءة الإنتاجية والتناسلية للأبقار الشامية.


References used
Abdel Gader, A. Z., M. K. A. Ahmed, L. M. A. Musa and K. J. Peters. 2007. Milk yield and reproductive performance of Friesian cows under Sudan tropical conditions. Arch. Tierz. Dummerstorf. 50(2): 155-164
Ahmad, M. 1999. Genetic evaluation of native and crossbred dairy cattle in Pakistan. PhD Thesis, New England Univ., Australia
Al-Najjar, K. A. 1997. Genetic improvement in dairy cattle. M. Sc. Thesis, Fac. Agric, Ain shams Univ., Cairo,Egypt
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