THE LONG-TERM EFFECTS OF LIMING ON THE DRY MATTER PRODUCTION AND CHEMICAL COMPOSITION OF PERENNIAL RYEGRASS (LOLIUM PERENNE L.)

For studying the long-term effect of meliorative liming, a field experiment was set up in four replications, at three production sites, during the year 2006. Besides the control combinations (not treated with lime), a lime-dose calculated upon the Hungarian Liming Recommendation System (that is based on the hydrolytic acidity) and the half of this dose resp. were added to the treatment combinations. A year later, soil samples were taken from each sites and plots, and a pot-experiment on the basis of Mitscherlich Was Set Lip, with perennial ryegrass (Lolium perenne L.) as a test plant. In this work the yield and element composition of plants grown on limed and not limed soils will be compared. These experiments confirm (lie results or former experiments that state, that the lime amount calculated from the hydrolytic acidity is excessive.