Abstract
Summary The N2 fixation ability was investigated in 4 new-bred pea cultivars and the ‘Bohatýr’ cultivar. Eight strains of Rhizobium leguminosarum were used for the inoculation. The experiment was performed hydroponically, using a perlite substrate. Total nitrogenase activity (TNA) and shoot dry weight of the plants were compared. The effect of the strain x cultivar interactions were investigated as exerted on the performance of N2 fixation. Statistically significant differences among treatments were found both in the TNA and in the shoot dry weight of plants. Much lower values for both characteristics were recorded in the newly developed cultivar ‘Lu 28B’ in comparison with the rest of the cultivars. The genetic properties of this cultivar had an adverse effect on the results of N2 fixation even in combination with an excellent Rhizobium strain 120.
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