Relationship between dissolved organic carbon and calcium and magnesium in soil water phase and their uptake by meadow vegetation / Zależność miedzy rozpuszczalnym węglem organicznym (RWO) w fazie wodnej gleby a stężeniem w niej wapnia i magnezu oraz ich pobraniem z plonem roślinności łąkowej

Abstract

Abstract Studies on the effect of dissolved organic carbon (DOC) on the concentration of calcium and magnesium in soil water phase (ground water and soil solution) and on their uptake by plants are less numerous than those on nitrogen and phosphorus. This study was aimed at assessing the relationships between DOC in ground water and soil solution from under meadow on mineral soil and Ca and Mg concentrations and their uptake by plants. Presented studies were performed in the years 2004-2007 on long-term meadow experiments situated in Janki and Laszczki in Masovian Province. Increasing DOC concentrations in soil solutions increased Ca uptake and decreased Mg uptake by plants which was facilitated by decreasing soil acidity. A lack of significant effect of DOC concentration in ground water on Ca and Mg uptake but demonstrated opposite direction of this effect confirms the antagonism in calcium and magnesium behaviour in the environment. Obtained results indicate that mutual relationships among DOC, Ca and Mg in a ground water - soil solution - meadow vegetation system is complex and needs further studies.