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Details van artikel 2 van 9 gevonden artikelen
| Titel: |
Biogeochemistry and weathering in a forest catchment and an arable field in central Sweden |
| Auteur: |
Ulen, B. Snall, S. |
| Verschenen in: |
Acta agriculturae Scandinavica. Section B, Soil and plant science |
| Paginering: | Jaargang 48 (1998) nr. 4 pagina's 201-211 |
| Jaar: |
1998-12 |
| Inhoud: |
Fluxes of base cations, nitrogen and phosphorus were investigated in a long-term study at a forest site and a nearby arable site in central Sweden. At both sites soil mineralogy was reflected in the stream water concentrations, especially during base-flow. Weathering rates for the major base cations and natrium (SBC + Na) in the forest soil calculated from empirical relationships and quartz distribution in the soil profile were 0.4 and 0.3 kmolc ha-1 year-1, respectively. Simulations using the PROFILE model of forest soil predicted a weathering rate of 0.6 kmolc ha-1 year-1 Net vegetation uptake of base cations was calculated to be larger, at 0.8 kmolc ha-1 year-1 In the soil of the arable site biogeochemical fluxes resulting from weathering and biomass removal were one order of magnitude faster. Budget calculations for the arable land indicated that a weathering rate of 7 kmolcha -1 year -1 was needed to keep the system in balance. Weathering of Mg was estimated to be equal to the amount applied as fertilizer based on the quantities supplied during a 15-year period of conventional farming. For K the ratio of weathering to the need for fertilization was estimated at 1.5. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 2 van 9 gevonden artikelen
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