Do you want to publish a course? Click here

Pedological and microbiological study of a Pine forest soil profiles in the coastal Region (Mehwarti Forest)

دراسة بيدولوجية و ميكروبيولوجية لقطاعات تربة غابة صنوبرية في المنطقة الساحلية

1424   0   42   0 ( 0 )
 Publication date 2014
and research's language is العربية
 Created by Shamra Editor




Ask ChatGPT about the research

The aim of this study was to determine some physical, chemical properties and microbiological density (fungi –bacteria) of a Pine forest soil in the coastal region (Mehwarti forest, Banias), where Pinus brutia is the main dominant plant. Three soil profiles were carried out and their morphological characteristics were determined, the thickness of accumulated organic residues and GPS data were also recorded. For physical and chemical analysis, samples from each profile horizon were taken and air- dried, whereas for the microbial diversity analysis, samples were taken twice in autumn and spring, and transported and stored at 4C. The results showed that the studied soil belongs to Alfisol Order with A -Bt – C profile types. Our results also showed that the soil depth was (85-100cm) and the texture was clay with a high porosity in all studied soil horizons. The content of calcium carbonate in the studied horizons was closely similar and increased with soil depth, whereas the pH ranged between 6.8 and 7.9. The results indicated that the organic matter decreased significantly with soil depth that affected the microorganisms density which behave in the same manner. This decreas was very clear in the first horizon especially in spring.


Artificial intelligence review:
Research summary
تتناول هذه الدراسة الخصائص الفيزيائية والكيميائية والكثافة الحيوية لبعض المجاميع الميكروبية (تعداد كلي، فطريات، بكتريا) لتربة غابة صنوبرية (Pinus brutia) في الساحل السوري بمنطقة بانياس-حريصون. تم تنفيذ ثلاثة مقاطع كاملة في أرض الغابة وصولاً إلى الصخر الأم، وأجري عليها الوصف المورفولوجي وسجلت بيانات تحديد الموقع GPS لكل قطاع. أخذت عينات من كل أفق من الآفاق المشكلة للقطاعات، ونقلت إلى المخبر لإجراء التحاليل الفيزيائية والكيميائية والميكروبيولوجية. أظهرت النتائج أن التربة تنتمي إلى Alfisol، بقطاعات A-Bt-C، وعمقها يتراوح بين 85-100 سم، وقوامها طيني مع مسامية عالية. كما بينت النتائج أن محتوى كربونات الكالسيوم يزداد بالاقتراب من الصخر الأم، ودرجة الحموضة تتراوح بين 6.8 و7.9. انخفضت المادة العضوية بشكل حاد مع العمق، مما أثر على كثافة الكائنات الحية الدقيقة التي تناقصت أعدادها بنفس الاتجاه. كما أظهرت الدراسة زيادة واضحة في كثافة الأحياء الدقيقة في الأفق السطحي في فصل الربيع مقارنة بالخريف.
Critical review
تعتبر هذه الدراسة مهمة في فهم خصائص التربة الغابية وتوزيع الكائنات الحية الدقيقة فيها. ومع ذلك، يمكن توجيه بعض النقد البناء لتحسين الأبحاث المستقبلية. أولاً، كان من الممكن تضمين المزيد من المواقع لزيادة تنوع العينة وتحسين دقة النتائج. ثانياً، لم يتم التطرق بشكل كافٍ إلى تأثير العوامل البيئية الأخرى مثل التلوث أو النشاط البشري على التربة والكائنات الحية الدقيقة. أخيراً، كان من الممكن استخدام تقنيات تحليلية أكثر تقدماً مثل التحليل الجيني للكائنات الحية الدقيقة لفهم أفضل لتنوعها ووظائفها.
Questions related to the research
  1. ما هي الخصائص الفيزيائية والكيميائية لتربة غابة الصنوبر البروتي في الدراسة؟

    تتميز التربة بعمق يتراوح بين 85-100 سم، قوام طيني، مسامية عالية، محتوى كربونات الكالسيوم يزداد مع العمق، ودرجة حموضة تتراوح بين 6.8 و7.9. كما تنخفض المادة العضوية بشكل حاد مع العمق.

  2. كيف تؤثر المادة العضوية على كثافة الكائنات الحية الدقيقة في التربة؟

    تنخفض كثافة الكائنات الحية الدقيقة مع انخفاض المادة العضوية في التربة، حيث توجد علاقة ارتباط قوية بينهما. تزداد كثافة الأحياء الدقيقة في الأفق السطحي في فصل الربيع مقارنة بالخريف بسبب زيادة المواد العضوية المتراكمة.

  3. ما هي التصنيفات المورفولوجية للتربة التي تم دراستها؟

    تنتمي التربة إلى رتبة Alfisol، بقطاعات من النوع A-Bt-C. الأفق A يتميز ببنية حبيبية، الأفق Bt يتميز ببنية كتلية، والأفق C يتميز بوجود أكاسيد الحديد.

  4. ما هي التوصيات التي قدمتها الدراسة لإدارة الغابات؟

    أوصت الدراسة باستخدام تقنية الاستشعار عن بعد لمراقبة حالة الغابة، وإجراء أبحاث مماثلة في مناطق أخرى لتصنيف الترب في الساحل السوري وسوريا بشكل عام.


References used
AFES.(1992): Référentiel pédologique Principaux sols d'Europe. INRA Ed.,: 222p
ALEXANDER, M. (1996): Introduction to soil microbiology, Wiley,ir.y
BURESH, R.J.; AUSTIN, E.R. AND CRASWELL, E.T. (1982): Analytical methods inN-15 research. Fert. Res. 3: 37 - 62
rate research

Read More

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 hor izon- 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.
The aim of this study was to determine some physical, chemical and microbiological density (fungi – bacteria) of a Pine forest soil in the coastal region (Al-Ballotiah forest, Banias) where Quercus calliprinus is the main dominant plant. Three soi l profiles were taken and their morphological characteristics were determined, the thickness of accumulated organic matter and GPS data were also recorded. For physical and chemical analysis, samples from each profile horizon were taken and air- dried, whereas for the microbial diversity analysis, samples were taken twice in autumn and spring; and transported and stored at 4C. The results showed that the studied soil belongs to Mollisols, Entisols with A-AC-C1-C2 profile types. Our results also showed that the soil depth was (153-150 cm) and rich in calcium carbonate. Soil pH is alkali, where the pH ranged between (7.91-9.13) that increased bacterial activity and density in organic litter and mineral soil, which was related with the organic matter ratio. This ratio decreased significantly with soil depth that affected the microorganisms density which behave in the same manner. However, an increasing of microorganisms density was detected in spring especially in first horizon.
The research was performed during the three years from 2011 in the coastal area “Lattakia and Tartous” The study of soil erosion has been traced in eight occasional sites in the coastal area, Gradient in its slope degree from 10% to 45% . the eight sites has also been studied under the three systems “Forests, burned forests , planted soil” The results shows, that the dangerous of the Water erosion in the coastal area soils especially in the slopes that is more than 15%, the drift reached scary figures that ranged between 32.5 ton/Hectares when the slope was 10%, and 165 ton/hectares when the slope was 45% in the agricultural system (Where the surface of the soil is semi-disgrace), These amounts ranged between 9 and 56.5 t / hectares/year in the burned forest system and between 1.4 and 15 t / hectares/year in the forest system. The runoff of rain water may range between 24 and 59.20 in the forest system versus 6.8 and 32.8 in the burned forest systems and, finally, between 2.9 and 16.8 in the forest system.
The objective of this research to study the chemical composition and microbial load for some types of pies by performing various chemical and microbial analysis of samples collected, from different parts of the Syrian coast which are famous for its production. This study showed a large variation in the chemical composition of samples by type of the pastry and place brought from, for example, the proportion of dry matter for peppers and chard pies collected from Banias was, 75.71% and 44.90%, respectively, and the percentage of dry matter was 73.88% and 76.18% and the proportion of protein was, 17.76% and 24 .88% for cheese pies collected from Tartous and Latakia 1, respectively. This study indicated that all the pies contain a high percentage of fat [the lowest in chard pies (17.64%) and the highest in cheese pies (38.12%)]. Furthermore a high percentage of sodium was found (the highest in cheese pies 15.31 mg / 100 g and lowest in pepper pies 7.82 mg / 100 g). The study also showed that these meals meet international standards in terms of content of lead, cadmium, Nevertheless they are poor in fiber content except for chard pies which were the most balanced in terms of components, making it the best type of pies in nutritional aspect. Finally, the results showed that the microbial load was too high, as the total census of bacteria was higher than 105 and the total census of yeasts and fungi was higher than 102. In addition, all pies are not conformed to the Syrian legislation. The study also showed absence of E.coli and St. aureus of all samples.
This research aims at evaluating the effect of fire on the erosion of burned forest soils after rainfall. The research was carried out during (2010/2011) in a pine forest near the village of Ein Al-Jaouz at an altitude of 900m, north east Tartous g overnorate. The forest had a fire in October 2009. Ten metal plots (2m2 each plot) were used to evaluate soil erosion, five plots in the burned part of the forest and another five plots in the unburned part. The runoff coefficient, soil erosion rate, soil pH and rate of some mineral elements (Ca++, K+ , Mg++) were estimated and compared in the two parts. This study showed that the runoff coefficient was three times as great on the burned part as on the unburned part, and the rate of soil erosion was 7.22 Mg/ha in the burned part and 0.1Mg/ha in the unburned part. This shows the impact of fire in increasing soil erosion and runoff. This study also showed the difference in cation concentrations in the runoff water between the two parts. The study reveals the importance of protecting forests against fire. This is to limit soil erosion and its economic and environmental consequences.
comments
Fetching comments Fetching comments
Sign in to be able to follow your search criteria
mircosoft-partner

هل ترغب بارسال اشعارات عن اخر التحديثات في شمرا-اكاديميا