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Effect of slope position on somephysico - chemical properties of a pine forest soil ,Tartous, Syria

تأثير مناطق المنحدر على بعض الخصائص الفيزيائية و الكيميائية لتربة غابة صنوبرية, طرطوس , سورية

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 Publication date 2017
and research's language is العربية
 Created by Shamra Editor




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The main aim of this study was to determine the effect of slope position on some soil physico-chemical properties .The study was conducted on a pine forest soil , Tartous. Soil samples were collected from top , mid and bottom slope positions at horizon- A and C of top and mid slope positions and at horizon A,(B)and C of bottom slope positions . Results showed a significant difference among the physico-chemical properties of top , mid and bottom slope soils . Bulk density of the top - slope (1.34 gcm-3) was the highest followed by mid ( 1.31 gcm-3) and bottom slopes (1.27 g cm-3) .Conversely ,Organic matter content (2.86%) ,electrical conductivity EC(0.20mmos/cm) , calcium(28.3 meq/100g) , magnesium(6.80 meq/100g) , Potassium (0.21 meq/100g), Soil pH ( 7.95) , clay content (38.43 %) and silt content (34.70%) were the highest at bottom slope followed by mid and top- slopes , respectively . Soil A and C horizon of top and mid slope positions and A ,(B)and C horizons of bottom slope positions were also significantly different in their physical and chemical properties . Horizon A had the highest organic matter ,electrical conductivity , calcium , magnesium , silt contents and lower bulk density,CaCO3, sand contents than both the (B) and C horizons of bottom slope and the C horizon of top and mid slope .The deterioration in physico-chemical properties of top slope as compared to mid and bottom slopes and that of A horizon as compared to C horizons were presumed to be due to past soil erosion effect that removed the finer soil particles including soil organic matter and other plant nutrient.


Artificial intelligence review:
Research summary
تهدف هذه الدراسة إلى تحديد تأثير مناطق المنحدر على بعض الخصائص الفيزيائية والكيميائية للتربة في غابة صنويرية بطرطوس، سوريا. تم جمع عينات التربة من قمة، وسط، وأسفل المنحدر وتحليلها لتحديد الكثافة الظاهرية، محتوى المادة العضوية، الناقلية الكهربائية، محتوى الكالسيوم، المغنزيوم، البوتاسيوم، الطين، والسلت. أظهرت النتائج اختلافات هامة بين الخصائص الفيزيائية والكيميائية لمناطق المنحدر المختلفة. كانت الكثافة الظاهرية أعلى في قمة المنحدر وأقل في أسفل المنحدر، بينما كانت محتويات المادة العضوية والعناصر الغذائية الأخرى أعلى في أسفل المنحدر. يُعزى هذا التباين إلى تأثير انجراف التربة الذي أدى إلى نقل الجزيئات الناعمة والمغذيات النباتية إلى أسفل المنحدر. توصي الدراسة بضرورة الحفاظ على الغطاء النباتي الطبيعي في مناطق قمة المنحدر لتقليل مخاطر الانجراف.
Critical review
دراسة نقدية: تُعد هذه الدراسة خطوة مهمة لفهم تأثير الانحدار على خصائص التربة، إلا أن هناك بعض النقاط التي يمكن تحسينها. أولاً، كان من الممكن أن تكون الدراسة أكثر شمولاً إذا تم تضمين مناطق أخرى ذات خصائص منحدر مختلفة لمقارنة النتائج. ثانياً، لم يتم التطرق بشكل كافٍ إلى تأثير العوامل المناخية الموسمية على نتائج الدراسة. ثالثاً، كان من الممكن استخدام تقنيات تحليلية أكثر تطوراً للحصول على نتائج أكثر دقة. وأخيراً، يُفضل إجراء دراسات طويلة الأمد لمراقبة التغيرات في الخصائص الفيزيائية والكيميائية للتربة على مر الزمن.
Questions related to the research
  1. ما هي الأهداف الرئيسية للدراسة؟

    تهدف الدراسة إلى تحديد تأثير مناطق المنحدر على بعض الخصائص الفيزيائية والكيميائية للتربة في غابة صنويرية بطرطوس، سوريا.

  2. ما هي النتائج الرئيسية التي توصلت إليها الدراسة؟

    أظهرت النتائج أن الكثافة الظاهرية كانت أعلى في قمة المنحدر وأقل في أسفل المنحدر، بينما كانت محتويات المادة العضوية والعناصر الغذائية الأخرى أعلى في أسفل المنحدر.

  3. ما هي التوصيات التي قدمتها الدراسة؟

    توصي الدراسة بضرورة الحفاظ على الغطاء النباتي الطبيعي في مناطق قمة المنحدر لتقليل مخاطر الانجراف.

  4. ما هي العوامل التي يُعزى إليها التباين في الخصائص الفيزيائية والكيميائية للتربة؟

    يُعزى التباين إلى تأثير انجراف التربة الذي أدى إلى نقل الجزيئات الناعمة والمغذيات النباتية إلى أسفل المنحدر.


References used
AANDAHL, A.R. The characterization of slope positions and their influence on total nitrogen content of a few virgin soils of Western Iowa. Soil Science Society of America Proceedings 13:,1948, 449-454
ASSOULINE S, BEN-HUR M. Effects of rainfall intensity and slope gradient on the .dynamics of interrill erosion during soil surface sealing. Catena 66:,2006, 211-220
ASTM (Am. Soc. Test. Master). Procedures for testing soils. American Society For Testing and Materials, Philadelphia ,1958
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