19. Influence of the leaf fertilization on the productivity of two common wheat varieties

The current paper mainly aims at evaluating the influence of the leaf fertilization on the established Bulgarian wheat variety Apollo and the introduced variety Bologna. The research was conducted in the region of Stara Zagora, in the conditions of meadow-cinnamon soil type. Two common wheat varieties were examined (Apollo and Bologna), cultivated by means of technology that is traditional for the region. Options of the field research were as follows: 1. Control – null fertilization; 2. Fertilization with N14; 3. Fertilization with N14 + Lactifrost; 4. Fertilization with N14 + Lactifrost + Lactofol basic; 5. Fertilization with N14 + Lactofol basic.
Positive correlations were established between the structural elements that define the productivity of the tested varieties. There was a high positive correlative dependence between the profit and the norm of profitableness of Apollo variety. A high positive correlative dependence was registered between the mass of 1000 beans and the yield, the profit and the norm of profitableness of Bologna variety. The linear regressive model between the mass of 1000 beans and the yield for both wheat varieties showed a high degree of correlation.