ISSN:
1573-2932
Source:
Springer Online Journal Archives 1860-2000
Topics:
Energy, Environment Protection, Nuclear Power Engineering
Notes:
Abstract The contribution of atmospheric acids to cation leaching from a podzolic soil under mature maple-birch forest in central Ontario was examined during 1983. The movement of base cations was associated largely with NO3 −, SO4 2− and organic acid anions in surface soil horizons, with SO4 2− and NO3 − below the effective rooting zone, and SO4 2− and HCO3 − in streamflow. Mineral soil horizons could adsorb little additional SO4 2− or associated cations at current soil solution SO4 2− concentrations. Therefore it is concluded that the soil in situ lacks a strong affinity for SO4 2−. Current annual inputs to the forest of SO4 2− and NO3 − in bulk precipitation (26.4 and 18.2 kg ha−1, equivalent to 8.8 kg S and 4.1 kg N ha−1 , respectively) contributed significantly to cation leaching from the soil. In order to maintain exchangeable cations in soil at current levels, a rate of weathering yielding 29.6, 5.0, 4.4 and 2.2 kg ha−1 yr−1 of Ca2+, Na+, Mg2+ and K+, respectively, would be required.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00284234
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