Effect of acidification on the content of water-soluble aluminium in pseudogleys

Abstract

The results show that solution pH in different soils decreased unevenly with rates of acid. Total aluminium has a tendency to gradually increase from pH 6.0 to about 4.0, and then Altot is abruptly released. Almono occurs in soils of pH 5.5 and lower. The percentage of Almono/Altot is lower in soils of Salaš and Jabučje and it reached 100% at pH equal to 3.09 and 3.40, and in Kladovo and Arilje it accounted for 100% at pH equal to 4.10 and 4.41. Above these pH values there are less toxic polymeric Al, which is important in assessing the adverse effects of Al on the plant. Based on the dynamics of Altot, and especially of Almono, it can be concluded that a less detrimental effect of acidification on Al mobilisation occurred in pseudogleys with higher pH, CEC and base saturation, and with lower levels of some reactive Al reserve.

Keywords

• acidification
• aluminium
• dynamics
• pH
• pseudogley
• soils