Fluxes of Dissolved Organic Carbon and Nutrients Leaching in Toposequent of Bukit Dua Belas National Park, Indonesia
The study of dissolved organic carbon (DOC) and nutrients leaching fluxes from soil profiles has important
impacts to the quality of soils and the environment. This research was conducted in lowland secondary tropical forest of the
Bukit Dua Belas National Park, Jambi Province, Indonesia. The research site was appropriated toposequent transect divided
into three soil profiles in upper, middle, and lower slopes. The research results indicated that fluxes of DOC leaching of the
lower slope was significantly higher compare to that of the middle and the upper slopes. Similarly, fluxes of nutrients
leaching of AO soil horizon was higher compare to that of lower soil horizons. There were significant positive correlations
between nitrate, phosphate, sulphate, chloride, and borate anions with calcium, magnesium, potassium, and ammonium
cations. DOC leaching flux also has significant positive correlations with these ions.
Keywords- Lowland Secondary Tropical Forest, Flux. DOC, Cations, Anions.