Determination of nitrogen mineralization and soil respiration in different slope and aspect groups of oak stands and pasture

In this study, the effects of vegetation type, slope, and aspect on soil properties, soil respiration and nitrogen mineralization were investigated in Seyitler area in Artvin. For this puspose, two slope and aspesct groups and two vegetation types were selected. It was studied at 30 samples areas. To determine of soil properties and soil nitrogen mineralization, it was measured along one year. For soil respiration it was measured 16 months. Soil moisture and temperature were measured with soil respiration. Soil properties such as texture, pH, organic matter, Total nitrogen, bulk density, skeleton content, C/N ratio were analayzed. For nitrogen mineralization, ammonia and nitrate were analayzed. Soil respiration changed between 0,30 - 5,17 g C m-2 d-1 in pasture areas, and 0,08 - 4,86 g C m-2 gün-1 oak stands in a measurement year. İn the 0-15 cm soil deep, nitrogen mineralization, was found 57,3 kg ha-1 y-1 in pasture areas, and 42,0 kg ha-1 y-1 in oak stands. At the end of the investigation, Microorganism activities were found grasslands higher than oak stands. Slope, aspect and vegetation type were affected on soil respiration, soil properties and nitrogen mineralization. Especially changes of moisture and pH were characteristic factors nitrogen mineralization.