توافر وإنتاج الكتلة الحيوية والقيم الغذائية لأوراق شجرة العلف في منطقة ميراب آبايا في جنوب إثيوبيا
DOI:
https://doi.org/10.35516/jjas.v20i4.2316الكلمات المفتاحية:
الوفرة، إنتاجية العلف، التركيب الكيميائي، العوامل المضادة للتغذيةالملخص
تم إجراء الدراسة لتقييم مدى توفرالمحصول العلفي والقيم التغذوية لأوراق أشجار العلف المختارة. تم استخدام المسوحات الأسرية والقياسات الميدانية والتحليلات المعملية لتوليد البيانات. تم جمع بيانات المسح من 138 مشاركًا تم اختيارهم عشوائيًا باستخدام استبيانه منظمه تم اختبارها مسبقًا. تم تحديد وتصنيف 11 و18 و13 شجرة علفية على التوالي في الارض المرتفعة والارض الوسطية والارض المنخفضة. تم أخذ ما مجموعه 12 نوعًا من أشجار العلف في الاعتبار لتقدير إنتاجية الأوراق والتحليل المختبري. تراوح متوسط إنتاجية الأوراق (كجم DM ) لكل شجرة من الأنواع العلفية المختارة من 15.96 لنبات Rhus natalensis في الأراض المنخفضة إلى 128.43 لـ Erythrinabrucei في الارض المرتفعة وتباين بشكل كبير (P <0.05) بين الأنواع. كان محتوى البروتين الخام (CP) بال-(جم/كجم DM) هو الأعلى في Erythrinabrucei (198.3) وكان الأقل في Psydrax schimperiana (151). وقد لوحظ أعلى مستخلص إيثر (EE) في Mystroxylon aethiopicum (18.66 جم/كجم DM) وأدنى ما لوحظ في Nuxiacongesta (13.36 جم/كجم DM). كانت الألياف المنظفة المحايدة/ NDF/ هي الأعلى في Arundinaria alpine (602 جم/كجم DM) وأقلها في Psydrax schemperiana (297.4 جم/كجم DM). لم تكن هناك فروق معنوية في محتوى التانين المكثف بين الأشجار العلفية المدروسة. تراوحت قيم الأوكزالات من 18.4 جم/كجم DM في نبات Terminalia brownii إلى 36.5 جم/كجم DM في Balanites aegyptiaca بشكل عام، كانت الاختلافات b في محصول الأوراق والمحتوى التغذوي بين الأنواع العلفية المختلفة معنوية (P<0.05). من نتائج هذه الدراسة، يمكن استنتاج أن أنواع الأشجار العلفية يمكن اعتبارها مصدراً محتملاً للإنتاج الانقى للبروتين الخام لتكملة العلف الخشن ذو الجودة الرديئة لسد الفجوة.
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