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Register a new userStudy of some diagnostic characteristics and microbial activity for coastal soils in Safita
دراسة بعض الخواص التشخيصية و النشاط الميكروبي لتربة غابية في منطقة صافيتا
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هدف البحث إلى دراسة بعض الخواص التشخيصية/المورفولوجية و الفيزيائية و الكيميائية/ و المنشئية لتربة غابية في الساحل السوري و تقدير كثافة بعض المجاميع المكروبية /بكتريا، فطريات، أكتينومايست/ للتعرف على واقع ترب الغابات الساحلية و طبيعتها و آفاق القطاعات الغابية و النشاط الميكروبي فيها. تضمنت الدراسة تنفيذ مقطعين كاملين وصولاً إلى مادة الأصل (الصخرة الأم) في منطقة صافيتا –طرطوس، و بعد توصيف المقاطع و تحديد آفاق التربة, أخذت عينات بمقدار 3 كغ من كل أفق، و أجريت عليها بعض التحاليل الفيزيائية و الكيميائية و الميكروبيولوجية. بينت نتائج البحث أن قيم pH التربة تراوحت بين المتعادل و القاعدي نتيجة غنى التربة بكربونات الكالسيوم و القواعد, و ضعف عمليات غسل التربة. و تركزت أعلى نسبة من المادة العضوية في الأفق السطحي في المقطعين المدروسين, و انخفضت مع العمق. كما ارتبط النشاط الميكروبي طرداً مع المادة العضوية و عكساً مع العمق لذلك ظهر انخفاض في التعداد العام للبكتريا و الفطريات باتجاه الآفاق السفلية. كما بينت النتائج تشكل أفق طيني (Bm) متحول في مقطعي التربة المدروسين.
The aim of current research was to study some diagnostic characteristics /morphological, physical, chemical/and the origin structureofforest soils in Syrian coastal region. In addition to estimation of microbial activity of some microbial groups/bacteria, fungi, actinomycete/ to establish a general view of these soils. Two complete sections were prepared in the considered soils /Safita-Tartous/ andsamples were taken after the soils sections description for diagnostic characterization. The results showed that the soil pH was between neutral and tiny basic and because of the richnessof the studied soil by calcium carbonate. However, the highest percentage of organic matter in all sections were concentrated in the surface horizon and was decreasing with depth. Our results also showed that the microbial activity was positively correlated with the content of the organic matter and negatively with the depth, so the total number of bacteria and fungi was decreasing in the under surface horizon. A muddymetamorphosedhorizon (Bm) was formed in the two sections.
References used
BARDGETT, R.D., FREEMAN, C., AND OSTLE, N.J. Microbial contributions to climate change through carbon cycle feedbacks. ISME J., 2008, 2: 805–814
BRUNEAU, P.M., DAVIDSON, D.A., GRIEVE, I.C., YOUNG, I.M. AND NUNAN, N. The effects of soil horizons and faunal excrement on bacterial distribution in an upland grassland soil. FEMS Microbiology Ecology, 2005., 52: 139–144
BRUSSAARD, L. Biodiversity and Ecosystem Functioning in Soil. Ambio. 1997, 26: 563–570
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