Imapact of Degraded (Exploited) and Undegraded ( Un Exploited) Forest Tree Stands on Soil Characteristics and Carbon Storage

Severe deforestation in the forests of northern Iran has caused soil degradation and erosion, reduced carbon storage and altered the natural state of forest stands. Therefore, this study aims to investigate the effect of tree species fusion on physical and chemical properties and soil carbon storage in two degraded and un degraded stands, three different forest types and two soil depths in Aliabad forestry plan Done. In this study, ten specimens in the degraded massif and 15 specimens in the undamaged massif were selected for sampling according to the typology of the dominant tree species. Soil samples were collected by mixed method at two shallow depths and physical and chemical factors of soil (bulk density, moisture content, acidity, nitrogen, potassium, calcium, magnesium and organic carbon) were measured and analyzed for variable Soil-related SAS statistical software was used. According to the results of the types in terms of potassium, acidity and electrical conductivity in the two masses are significantly different from each other  (P <0.01) two soil depths in terms of organic matter and electrical conductivity were significantly different (P <0.01). Also, two habitats in terms of potassium content and interaction (habitat Î soil depth) also showed a significant difference in terms of acidity (P <0.05). In addition, according to the results, the amount of storage Carbon in undegraded mass (30/97 kg / ha) was more than degraded mass (29/95 kg / ha) and in two depths, 10-20 had the highest amount of carbon sequestration compared to 0-10, on the other hand, comparison The average carbon storage in the three forest types also showed that the hornbeam type has the highest amount of carbon storage compared to the oak-hornbeam and hornbeam-maple types, and it seems that the hornbeam species is a moderator in element decomposition and sedimentation Carbon is in the soil.