Keywords :
Dry deciduous forest ,
Dry evergreen forest ,
Soil depth ,
Soil texture ,
บทคัดย่อ :
In several areas in Northeast Thailand, ever-
green and deciduous forests coexist under uniform terrain
and climatic conditions. We compared depth and physical
properties of soils between evergreen and deciduous forests
in the Sakaerat Environmental Research Station to clarify
what factor determines their distribution. The averaged soil
depths were 79 + 27 cm and 135 + 58 cm in the decid-
uous and evergreen forests, respectively. The soils in the
deciduous forests were relatively coarser in soil texture
than those in the evergreen forests, particularly in the
surface layers. The average available water capacity of the
solum was lower in the deciduous forest soils (78 mm) than
in the evergreen forest soils (123 mm). Compared with the
evapotranspiration from the evergreen forest in the study
area, the available water capacity of the evergreen forest
soil was almost the same as the water deficit during the dry
season (November-February), while that of the deciduous
forest soil was lower and insufficient to maintain the
evapotranspiration. These results suggest that the distri-
bution of deciduous and evergreen forests in the study area
was associated with soil water availability, which mainly
depends on soil depth.
เอกสารอ้างอิง :
Murata, N., Ohta, S., Ishida, A., Kanzaki, M., Wachirinrat, C., Artchawakom, T., & Sase, H. (2009a). Comparison of soil depths between evergreen and deciduous forests as a determinant of their distribution, Northeast Thailand. Journal of forest research, 14(4), 212-220.
