Long-term changes of soil chemistry in central sweden
1992
SJÖSTRÖM, JAN | QVARFORT, ULF
Changes in the chemistry of a Ferriorthic Podzol soil are studied by comparing a field site covered since 1890 with an exposed site. Analytical chemistry data for composite samples from the A2, A2/B, B, B/C, and C horizons were used. The exposed site has a higher exchangeable acidity in the four upper horizons and a lower base saturation in the A2, A2/B, and B/C horizons. The content of nonextractable metal cations is markedly lower in the exposed site, and the amount of extractable metal cations is larger. This is interpreted as the effect of more intense weathering due mostly to infiltrated acidic precipitation. The results reveal that long-term changes of the soil chemistry, including the estimation of metal fluxes, can be determined by this method.
显示更多 [+] 显示较少 [-]