The influence of liming and mineral fertilization on the utilization of nitrogen by spring barley

The influence of liming and fertilization with various nitrogen forms on the content and utilization of nitrogen was determined in a two-year pot experiment. The factors of the study were: liming, fertilization with ammonium and nitrate forms of nitrogen at two levels and fertilization with phosphorus at two levels. Spring barley was harvested at its full ripeness. Liming and calcium nitrate contributed to the decrease of nitrogen content in spring barley. The application of calcium carbonate influenced a significant increase of nitrogen uptake by the tested plant. A similar effect was observed in the case of nitrate nitrogen application. The effect was more visible on acid than limed soil. The utilization of nitrogen was higher in limed soil than in acid soil. The plants fertilized with calcium nitrate utilized nitrogen better than plants treated with ammonium sulphate. The increase of nitrogen rates limited its utilization from fertilizers.