Gol Ceyhun
Watershed Management Department, Faculty of Forestry, University of Cankiri Karatekin, 18200 Cankiri, Turkey.
J Environ Biol. 2009 Sep;30(5 Suppl):825-30.
This research was carried out in Dagdami river catchment located in the highlands of the Black sea region of Turkey. The objective of this study was to investigate the effects of representative land-use and land-cover types of largely deforested areas of Black sea region on soil properties. We measured these effects by quantifying some soil analyses were done on soil samples were taken at two depths (0-5 and 5-15 cm) and two aspects (N and S). According to the results of statistical analysis, satured hydraulic conductivity (K(sat)), bulk density (BD), water stable aggregates (WSA), soil organic matter (SOM), soil organic carbon (SOC) and total nitrogen significantly change with land use type and aspect. Results have shown significantly higher values of saturated hydraulic conductivity (K(sat)) in natural forest top soil (82.4 cm3 x h(-1) on average) compared to grasslands soils (8.4 cm3 h(-1)) and hazelnut garden soils (11.5 cm3 h(-1)) and corn field soils (30.0 cm3 x h(-1)). It was determined that WSA was greater in the pasture and forest soils than in cultivated soils. In addition, K(sat) was found the highest value in the forest soils at all aspects while, SOM and SOC of forest soils are higher than other land use types. On the other hand, amount of SOM and SOC of soils of grassland, hazelnut garden and corn field are low level and close to each other Soils under hazelnut garden (1.1 g cm(-3)) and grassland (1.1 g cm(-3)) have higher bulk density than the adjacent soils under forests (0.7 g cm(-3)) and corn field (1.0 g cm(-3)) for two different aspects. Furthermore, after long-term continuous cultivation of the natural forest soil, it was determined that some physical and chemical characteristics of it has been significantly changed.
本研究在土耳其黑海地区高地的达格达米河流域开展。本研究的目的是调查黑海地区大面积森林砍伐区域的典型土地利用和土地覆盖类型对土壤性质的影响。我们通过对取自两个深度（0 - 5厘米和5 - 15厘米）以及两个坡向（北坡和南坡）的土壤样本进行一些土壤分析来量化这些影响。根据统计分析结果，饱和导水率（K(sat)）、容重（BD）、水稳性团聚体（WSA）、土壤有机质（SOM）、土壤有机碳（SOC）和总氮随土地利用类型和坡向显著变化。结果表明，与草地土壤（8.4立方厘米/小时）、榛子园土壤（11.5立方厘米/小时）和玉米田土壤（30.0立方厘米/小时）相比，天然林表层土壤的饱和导水率（K(sat)）值显著更高（平均为82.4立方厘米/小时）。研究发现，牧场和森林土壤中的水稳性团聚体（WSA）比耕地土壤中的更大。此外，在所有坡向中，森林土壤的饱和导水率（K(sat)）值最高，而森林土壤的土壤有机质（SOM）和土壤有机碳（SOC）高于其他土地利用类型。另一方面，草地、榛子园和玉米田土壤的土壤有机质（SOM）和土壤有机碳（SOC）含量较低且彼此接近。在两个不同坡向中，榛子园（1.1克/立方厘米）和草地（1.1克/立方厘米）下的土壤容重高于相邻的森林（0.7克/立方厘米）和玉米田（1.0克/立方厘米）下的土壤。此外，在天然林土壤长期连续耕种后，发现其一些物理和化学特性发生了显著变化。
