Fluxes and concentrations of dissolved organic carbon in soils

Dissolved organic carbon (DOC) in soil solution plays roles in soil C storage and biogeochemical cycles. Factors regulating fluxes and concentrations of DOC still remain unclear. To identify the factors regulating fluxes and concentrations of DOC in the soil profiles, we compiled the data of site information [Country, Region or state, Coordinates, Vegetation, Mean annual air temperature (ºC), Climate type, Vegetation type, Mycorrhiza type, Soil (USDA, Soil Taxonomy)], soil properties [Litter pH (H2O), Soil pH (H2O), Soil C/N ratio, Clay (%), Alo+1/2Feo (g kg-1), O horizon C stock (Mg C ha-1), Mineral soil C stock (Mg C ha-1)], fluxes and concentrations of DOC [Throughfall DOC flux (kg C ha-1 yr-1), DOC flux at the bottom of the O horizon (kg C ha-1 yr-1), DOC flux at the bottom of the B horizon (kg C ha-1 yr-1), DOC concentration at the bottom of the O horizon (mg C L-1), DOC concentration at the bottom of the B horizon (mg C L-1), DOC/Dissolved organic N (DON) (O horizon), DOC/DON (B h..., The data were compiled from data in our study and those from published sources by searching for “dissolved organic carbon”, “solute”, “flux”, “leaching”, and “soil” in Google Scholar. We compiled the data of DOC fluxes in throughfall and soil profiles from 91 sites, of which the DOC flux data at 18 sites have been published by our group. The climate was classified into four groups [polar climate (MAT < 0 ºC), boreal climate (0 ºC < MAT < 6 ºC), temperate climate (6 ºC < MAT < 20 ºC), tropical climate (20 ºC < MAT)], based on mean annual air temperature.
The other parameters include climatic properties [mean annual precipitation and mean annual air temperature], plant litter properties [litterfall C input, C/N ratio, Klason-lignin (residue after digestion with sulfuric acid; Allen et al., 1974), lignin/N ratio, root litter production] and soil properties [soil C stocks (O horizon and mineral soil (0-30 cm depth)), pH (water extraction), clay content, short-range-order (..., , # Fluxes and concentrations of dissolved organic carbon in soils

This README file was generated on 2024-01-30 by Kazumichi Fujii.

Site and soil information and fluxes and concentrations of dissolved organic carbon in soils

# Principal Investigator Contact Information

Name: Kazumichi Fujii
Institution: Forestry and Forest Products Research Institute
Address: Tsukuba 305-8687, Japan.
Email:

# Abstract

To identify the factors regulating fluxes and concentrations of dissolved organic carbon (DOC) in the soil profiles, we compiled the data of site information [Country, Region or state, Coordinates, Vegetation, Mean annual air temperature (ºC), Climate type, Vegetation type, Mycorrhiza type, Soil (USDA, Soil Taxonomy)], soil properties [Litter pH (H2O), Soil pH (H2O), Soil C/N ratio, Clay (%), Alo+1/2Feo (g kg-1), O horizon C stock (Mg C ha-1), Mineral soil C stock (Mg C ha-1)], fluxes and concentrations of DO C[Throughfall DOC flux (kg C ha-1 yr-1), DOC flux at the bottom of the O hor...