Volume No. 12 Issue No.: 4 Page No.: 395-401 April-June 2018

 

THE ROLE OF FOREST TYPE ON SOIL EVOLUTION AND REVITALIZATION IN ARASBARAN REGION, IRAN

 

Ali Asghar Jafarzadeh, Hossein Rezaei, Farzin Shahbazi1 and Ahmad Alijanpour2

1. Soil Science Department, Agriculture Faculty, University of Tabriz- (IRAN)
2. Department of Forestry, College of Natural Resources, Urmia University, (IRAN)

 

Received on : December 29, 2017

 

ABSTRACT

 

In forest ecosystems, relation between soil and vegetation or forest types refers to an important role in soil evolution and revitalization. The vegetation can be an effective factor beside other ones that complete various soils forming processes effect. The present research work carried out along an altitudinal transect of Kaleybar Chai Sofla sub-basin in Arasbaran forests(650-2200 m) based on soil evolution and vegetation growth relation, using environmental science branches of pedology and forest inventory. Firstly the study area were separated by forest types of Oak (Quercus macranthera), Hornbeam - Oak (Carpinus betulus Quercus macranthera), Hornbeam (Carpinus betulus), Hornbeam - Oak (Carpinus betulus Quercus petraea), Oak - Hornbeam (Quercus petraea- Carpinus betulus) and Oak (Quercus petraea) in six units respectively. Then 30 plots and soil profiles by 50m elevation differences were studied and sampled. Vegetation characterizes such as numbers of trees in plot, trees high, basal diameter, number of coppice and standard trees, crown diameter were determined and routine analysis of soil were completed, and then soils classification, micro morphological study completed to understanding soil evolution. Assessing of various units showed significance differences in vegetation properties with its consequences on soils especially in unit 3 with high quality. The soils formation, evolution and revitalization were affected directly by topography and vegetation except in unit 3 which just influenced by vegetation types that micro morphological observations confirm the results. Four soil orders of Entisols, Inceptisols, Mollisols and Alfisols with different families were identified and in this regards, the formation of Alfisols in unit 3 with high slope percentage and lessivage, can be related to resistant and pioneer vegetation role of Hornbeam forest type in soil formation, revitalization, development and evolution in unsuitable topographic condition.

 

Keywords : Arasbaran, Forest type, Soil evolution, Hornbeam, Vegetation

 

 

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