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Effect of Palm Trees Shading on Growth, productivity and nutritive value of Alfalfa (Medicago sativa L.) Under the Environmental Conditions of AL-Qassim Region, Kingdom of Saudi Arabia

تأثير تظليل أشجار النخيل في نمو البرسيم الحجازي (.L sativa Medicago) و إنتاجيته و قيمته الغذائية ضمن ظروف منطقة القصيم ـ المملكة العربية السعودية

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 Publication date 2004
and research's language is العربية
 Created by Shamra Editor




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This investigation was carried out at the experimental Station of the College of Agriculture and Veterinary Medicine, King Saud University, Al-Qassim, Saudi Arabia, during the growing season 2001/2002. The objectives of the research were to study and evaluate the productivity, morphological and physiological behavior of alfalfa (Medicago sativa L.) plants grown under palm trees environment. The results proved the important effects of palm trees shading on alfalfa growth, development and productivity. Significant differences were observed between the control treatment and the two other treatments. The results also showed a significant increase in fresh and dry weight and quality characteristics except for fat percentage. This percentage increased gradually from treatment 1, which was located under palm trees, to treatment 2, which was located between palm trees to the control treatment, which was located away from palm trees, where there was no shading. The morphological and physiological characteristics did not significantly change in spite of the existed changes among their means.


Artificial intelligence review:
Research summary
أجريت هذه الدراسة في محطة البحوث الزراعية التابعة لكلية الزراعة والطب البيطري في جامعة القصيم خلال الموسم الزراعي 2001/2002، وهدفت إلى دراسة تأثير تظليل أشجار النخيل على نمو وإنتاجية وقيمة البرسيم الحجازي (Medicago sativa L.) الغذائية في منطقة القصيم بالمملكة العربية السعودية. أظهرت النتائج تأثيرًا مهمًا لتظليل أشجار النخيل على الصفات الإنتاجية والنوعية للبرسيم الحجازي، حيث تبين وجود فروق معنوية بين معاملة الشاهد والمعاملات الأخرى. زادت الوزن الرطب والوزن الجاف وصفات الجودة المدروسة باستثناء نسبة الدهون الخام، حيث تدرجت الزيادة من المعاملة المزروعة تحت أشجار النخيل إلى المعاملة المزروعة بين أشجار النخيل، ثم إلى معاملة الشاهد المزروعة بعيدًا عن أشجار النخيل. لم تتأثر الصفات الشكلية المدروسة بشكل معنوي باستثناء ارتفاع النباتات الذي ازداد بشكل معنوي في المعاملة المزروعة تحت أشجار النخيل مقارنة مع معاملة الشاهد. أما الصفات الفيزيولوجية فلم تظهر فروق معنوية بين معاملات التجربة على الرغم من اختلافات متوسطات قياساتها.
Critical review
دراسة نقدية: الدراسة تقدم نتائج مهمة حول تأثير تظليل أشجار النخيل على نمو وإنتاجية البرسيم الحجازي، ولكن هناك بعض النقاط التي يمكن تحسينها. أولاً، كان من الأفضل تضمين تحليل أعمق للعوامل البيئية الأخرى التي قد تؤثر على النتائج مثل نوعية التربة ومستوى الرطوبة. ثانيًا، الدراسة اعتمدت على قياسات محددة للصفات الإنتاجية والفيزيولوجية، وكان من الممكن توسيع نطاق الدراسة لتشمل تأثيرات أخرى مثل مقاومة الأمراض والآفات. ثالثًا، لم يتم التطرق بشكل كافٍ إلى الآثار الاقتصادية لتظليل أشجار النخيل على إنتاجية البرسيم الحجازي، وهو جانب مهم للمزارعين. وأخيرًا، كان من الممكن تقديم توصيات عملية للمزارعين بناءً على النتائج المستخلصة من الدراسة.
Questions related to the research
  1. ما هو الهدف الرئيسي من الدراسة؟

    الهدف الرئيسي من الدراسة هو دراسة تأثير تظليل أشجار النخيل على نمو وإنتاجية وقيمة البرسيم الحجازي الغذائية في منطقة القصيم بالمملكة العربية السعودية.

  2. ما هي النتائج الرئيسية التي توصلت إليها الدراسة؟

    النتائج الرئيسية هي أن تظليل أشجار النخيل يؤثر بشكل معنوي على الوزن الرطب والوزن الجاف وصفات الجودة للبرسيم الحجازي، باستثناء نسبة الدهون الخام. كما تبين أن ارتفاع النباتات ازداد بشكل معنوي في المعاملة المزروعة تحت أشجار النخيل مقارنة مع معاملة الشاهد.

  3. هل هناك فروق معنوية بين المعاملات المختلفة في الصفات الفيزيولوجية؟

    لا، لم تظهر فروق معنوية بين معاملات التجربة في الصفات الفيزيولوجية على الرغم من اختلافات متوسطات قياساتها.

  4. ما هي التوصيات التي يمكن استخلاصها من الدراسة؟

    يمكن استخلاص توصيات للمزارعين بزراعة البرسيم الحجازي تحت أو بين أشجار النخيل لتحسين الإنتاجية والجودة، مع مراعاة العوامل البيئية الأخرى مثل نوعية التربة ومستوى الرطوبة.


References used
Al-Khateeb, A. A, and Deena, H. M. A., 2002. The date palm in Saudi Arabia. Cultivation, Production and Processing. Ministry of Agriculture and Water. Riyadh
Al-Moshileh, A. M. and M. I. Motawei., 2001. Effect of Light Intensity on Growth and Yield of Potato Under Central Saudi Arabia Conditions, Adv. Agric. Res. Vol. 6 (1), 2001. pp 87-93
A. O. A. C, 1990. Official methods of analysis (15th Ed). Association of Official Analytical Chemists. Arlington, VA
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