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An analytical study of the relationship between diameter and size of Pinus Pinea trees In Swieda province, Syria

دراسة تحليلية للعلاقة بين القطر و الحجم لأشجار الصنوبر الثمري Pinuspinea في محافظة السويداء

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 Publication date 2012
and research's language is العربية
 Created by Shamra Editor




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This research aimed to determine the relationship between diameter and size of Pinus trees available in 4 different regions in Swieda province. Breast height diameter and height of tree were measured for more than 500 Pinus Pinea trees. The relationship between diameter and size was studied, and a model of diameter and size was developed as a polynomial model .


Artificial intelligence review:
Research summary
أجريت هذه الدراسة بهدف تحديد العلاقة بين قطر الأشجار الصنوبرية المزروعة في مناطق مختلفة من محافظة السويداء وحجمها. تم قياس الأقطار على ارتفاع الصدر والارتفاع لأكثر من 500 شجرة موزعة في أربع مناطق تشجير مختلفة للصنوبر الثمري في المحافظة. تم حساب حجم كل شجرة مدروسة، ومن ثم درست العلاقة بين أقطار الأشجار على ارتفاع الصدر وحجومها باستخدام معادلة قطع مكافئ من الدرجة الثانية. أظهرت النتائج وجود علاقة ارتباط قوية (r=0.94) بين أقطار الأشجار وحجومها، إذ بلغت قيمة معامل التحديد (R²=0.88) وكانت معنوية (p<0.001). تم استخدام برنامج SPSS لتحليل البيانات وتحديد معادلة الانحدار التي تعبر عن العلاقة بين المتغيرين المدروسين. تمثل المعادلة الناتجة العلاقة بين القطر والحجم الحقيقي للأشجار المدروسة، مما يمكن من حساب حجم الأشجار بناءً على قياس قطرها فقط على ارتفاع الصدر، مما يوفر الوقت والجهد في الدراسات الحراجية المختلفة.
Critical review
تعد هذه الدراسة مهمة لفهم العلاقة بين قطر وحجم أشجار الصنوبر الثمري في محافظة السويداء، إلا أن هناك بعض النقاط التي يمكن تحسينها. أولاً، يمكن توسيع نطاق الدراسة لتشمل أنواع أخرى من الأشجار الحراجية لتحسين شمولية النتائج. ثانياً، يمكن استخدام تقنيات حديثة مثل التصوير الجوي أو الليدار لتحسين دقة القياسات وتقليل الجهد البشري. ثالثاً، يمكن دراسة تأثير العوامل البيئية الأخرى مثل التربة والمناخ على نمو الأشجار بجانب القطر والحجم. وأخيراً، يمكن أن تكون هناك حاجة لمزيد من الدراسات الطولية لمتابعة نمو الأشجار على مدى فترات زمنية أطول لضمان دقة النتائج وتطبيقها على نطاق أوسع.
Questions related to the research
  1. ما هو الهدف الرئيسي من هذه الدراسة؟

    الهدف الرئيسي من الدراسة هو تحديد العلاقة بين قطر الأشجار الصنوبرية المزروعة في مناطق مختلفة من محافظة السويداء وحجمها.

  2. ما هي المعادلة المستخدمة في الدراسة لتمثيل العلاقة بين القطر والحجم؟

    المعادلة المستخدمة هي معادلة قطع مكافئ من الدرجة الثانية: Log2 V = -0.0121 x2 + 0.6551 x - 10.8158.

  3. ما هي قيمة معامل الارتباط ومعامل التحديد في الدراسة؟

    قيمة معامل الارتباط هي r=0.94 وقيمة معامل التحديد هي R²=0.88.

  4. ما هي الفائدة العملية من استخدام المعادلة الناتجة في الدراسة؟

    الفائدة العملية هي إمكانية حساب حجم الأشجار بناءً على قياس قطرها فقط على ارتفاع الصدر، مما يوفر الوقت والجهد في الدراسات الحراجية المختلفة.


References used
ACSAD. 1980. Proceeding of Tour guide, soil classification workshop. 2-4 April, ACSAD\SS\R28 Damascus. 170 P
Gilman, E. F. and D. G. Watson. 1994. Pinus pinea Stone. Fact Sheet ST-472, a series of the Environmental Horticulture Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida
John, H. and M. Thornley. 1999. Modelling stem height and diameter growth in Plants . Annals of Botany 84: 195-205
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