Soil sulfur content and its spatial distribution in a small catchment covered by volcanic soil in the montane zone of central Japan

摘要: Abstract High concentrations of organic C and Al/Fe oxides, low bulk density are responsible for the accumulation large amounts S compounds in volcanic soils. The purpose our study was to clarify spatial distribution determine factors governing that within Katsura Headwater Catchment, a small drainage basin covered by soil mountainous area North Kanto district, central Japan. Geostatistical analysis revealed strong dependence total concentration throughout catchment area. Total were higher on upper slopes than lower slopes, deeper soils (20–50 cm depth) surface (0–20 cm depth). Our analyses also similar variations characteristic pedogenic minerals properties (i.e., oxalate extractable Al, Fe, Si), concentrations, density. relationships with mineral indicate is governed predominantly abundance those minerals, influence ash as parent material reflected more strongly residual colluvial Because differ, so too do pools uppermost 50 cm these soils: retain larger (2030 ± 590 kg S ha –1 average) (1400 ± 590 kg S ha average). results remains situ Catchment contributes variation S. inputs from plant communities might accumulation, particularly