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Factors affecting the adjusted 305-day milk yield in Holstein Friesian cattle at Kharabo Dairy Farm

العوامل المؤثرة في إنتاج الحليب المعدل على أساس 305 أيام عند بقر الهولشتاين فريزيان في مزرعة خرابو

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 Publication date 2014
and research's language is العربية
 Created by Shamra Editor




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This study was conducted at Kharabo dairy station belongs to the Faculty of Agriculture، University of Damascus. 692 productive records for 269 Holstein Friesian cattle were used to study the effects of calving year, age at first calving، calving season and parity on the adjusted 305-day milk yield. Data were exposed to GLM, analysis of variance was applied to determine the effect of studied factors and differences between averages were compared according to Duncan test using SPPS 17. The overall mean for (305-d milk) was 6222.6 ± 62.01 kg. and affected significantly (P < 0.001) by calving year and parity and (P<0.05) by age at first calving. No significant effect for season was observed. Results suggested that better management practices and improving the feeding status might help increasing the 305-d milk and making the status more economic efficient in the dairy cattle at Kharabo Farm.


Artificial intelligence review:
Research summary
أجريت الدراسة في مزرعة خرابو التابعة لكلية الزراعة بجامعة دمشق، حيث تم تحليل 692 سجلاً إنتاجياً لـ 269 بقرة هولشتاين فريزيان خلال الفترة من 1982 إلى 2008. هدفت الدراسة إلى تحديد متوسط إنتاج الحليب المعدل على أساس 305 أيام ودراسة تأثير سنة الولادة، العمر عند أول ولادة، فصل الولادة، وموسم الإنتاج على هذا المؤشر الإنتاجي. تم تحليل البيانات باستخدام النموذج الخطي العام وتحليل التباين، وأظهرت النتائج تأثيراً معنوياً لسنة الولادة وموسم الإنتاج على إنتاج الحليب المعدل، بينما كان التأثير أقل للعمر عند أول ولادة ولم يكن لفصل الولادة أي تأثير معنوي. بلغ المتوسط العام لإنتاج الحليب المعدل 6222.6 ± 62.01 كغ. وأشارت النتائج إلى أن تحسين الممارسات الإدارية وظروف الرعاية والتغذية يمكن أن يزيد من كمية الحليب المنتجة ويقلل من تأثير سنوات الولادة على الإنتاج، مما ينعكس إيجاباً على الأداء الإنتاجي والاقتصادي للمزرعة.
Critical review
دراسة نقدية: تعتبر هذه الدراسة مهمة لفهم العوامل المؤثرة على إنتاج الحليب المعدل في بقر الهولشتاين فريزيان في بيئة محلية. ومع ذلك، يمكن تحسين الدراسة من خلال تضمين المزيد من المتغيرات البيئية مثل نوعية الأعلاف وتوافر المياه وتأثير الأمراض. كما أن الدراسة قد تكون أكثر شمولاً إذا تم تضمين مقارنات مع مزارع أخرى في مناطق مختلفة من البلاد. بالإضافة إلى ذلك، يمكن أن تكون النتائج أكثر دقة إذا تم استخدام تقنيات تحليلية أكثر تقدماً مثل النماذج المختلطة التي تأخذ في الاعتبار التأثيرات العشوائية.
Questions related to the research
  1. ما هو الهدف الرئيسي من الدراسة؟

    الهدف الرئيسي هو تحديد متوسط إنتاج الحليب المعدل على أساس 305 أيام ودراسة تأثير سنة الولادة، العمر عند أول ولادة، فصل الولادة، وموسم الإنتاج على هذا المؤشر الإنتاجي.

  2. ما هي العوامل التي أظهرت تأثيراً معنوياً على إنتاج الحليب المعدل؟

    أظهرت النتائج تأثيراً معنوياً لسنة الولادة وموسم الإنتاج على إنتاج الحليب المعدل، بينما كان التأثير أقل للعمر عند أول ولادة ولم يكن لفصل الولادة أي تأثير معنوي.

  3. ما هو المتوسط العام لإنتاج الحليب المعدل في الدراسة؟

    بلغ المتوسط العام لإنتاج الحليب المعدل 6222.6 ± 62.01 كغ.

  4. ما هي التوصيات التي قدمتها الدراسة لتحسين إنتاج الحليب؟

    أوصت الدراسة بتحسين الممارسات الإدارية وظروف الرعاية والتغذية لزيادة كمية الحليب المنتجة وتقليل تأثير سنوات الولادة على الإنتاج.


References used
Ajili, N., B. Rekik, A. B. Ben Gara and R. Bouraoui. 2007. Relationships among milk production, reproductive traits and herd life for Tunisian Holstein- Friesian cows. Afr. J. Agric.Res. 2: 47-51
Akcay, H., M. Ilaslan and A. Koc. 2007. Effects of calving season on milk yield of Holstein cows raised at Dalaman State Farm in Turkey. Adu Ziraat Fakultesi Dergisi., 4(1-2) :59 – 61
Amasaib, E. O., H. E. Mohamed and A. N. M. A. Fadel Elseed. 2008. Lactation length and lactation milk yield in cattle in Sudan. Research. J. Dairy Sci., 2(1):1-4
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