Actual status development of active aluminium in the soils of Slovakia
2002
Makovnikova, J. (Soil Science and Conservation Research Institute, Bratislava (Slovak Republic))
The study describes the state of active aluminium content in Slovakia soils within probes of Partial Monitoring System - Soil in 1997 year (the soil properties have been monitored since 1993 year, when started the soil monitoring system in the Slovak Republic). The soil samples were taken at five - year regular intervals from following depths: grassland from depth 0-10, 20-30 and 35-45 cm, arable land from depth 0-10 and 35-45 mc. In soil samples were analysed exchangeable soil reaction pH in KCl potentiometrical. In samples with pH/KCl lower than 6.0 the active aluminium was determined according to Sokolov (soil is extracted with 1N KCl, Al is precipitated with NaF). Active aluminium content in humus horizon (A) in depth 0-10 cm ranged between 0.49 - 835.0 mg/kg (average value 62.11 mg/kg, median 6.32 mg/kg). In horizon 35-45 cm it was lower (average 55.57 mg/kg, median 8.60 mg/kg). Measured average value of active aluminium was from 2.40 mg/kg (Mollic FLuvisols uncalcaric group) to 518.80 mg/kg (group Podzols, Lithic Leptosols and Skeli-Dystric Leptosols). Developments of median of active aluminium content shown slight increase in eight causes from eleven evaluate soil groups. Statistically significant negative correlation between aluminium content and pH/KCl was determined (r = -0.88 in depth 0-10 cm, r = -0.91 in depth 35-45 cm)
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