多摩川流域の数種の土壤における二酸化炭素の放出速度と土壌溶液中の溶存有機炭素量との関係

抄録

Several soils from the Tama basin were acclimated at 25℃ in air-tight vessels until the constant rates of CO_2 evolution were obtained. The rate Y (mg C/kg dry soil/hr) of CO_2 evolution from the acclimated soils were highly correlated with the amount X (mg C/kg dry soil) of dissolved organic carbon in soil solution obtained by a centrifugalization. The equation Y=0.381X obtained in the acclimated solis held almost equally well in the treated soils by an air-drying, heating or others. The results were aldo compared with some soils from different sources in Japan.