Wpływ wapnowania i nawożenia magnezem na zmiany zawartości różnych form fosforu w górskich glebach łąkowych

The paper presents the results of pot experiment on Italian ryegrass conducted on two acid meadow soils. Liming and magnesium treatment in the form of MgCO₃ and MgSO₄ applied in the course of the experiment considerably changed the composition of inorganic phosphates, and caused the hi gest decline in aluminium phosphates, hut an increase in calcium and magnesium phosphates, in spite of significat differences in soil pH on those objects. The effect of those tretments was far less visible in relation to changes in the amount of available phosphorus is soil assessed by means of Egner-Riehm method than to the content of active phosphorus determined in 0,01 m CaCl₂.