Published in Scientific Papers. Series A. Agronomy, Vol. LXVII, Issue 1
Written by Gergana IVANOVA-KOVACHEVA, Iliana IVANOVA, Lyubomir IVANOV, Galin GINCHEV
The study was conducted within the Longstanding Stationary Fertilizer Experiment (LSFE) in IASS "Obraztsov Chiflik", Rousse with the aim of establishing the influence of different options of mineral fertilization on yield and resistance to environmental stress and the development of phytopathogens in common wheat. It was found that the highest yield for the period - 6,080 kg ha-1, was obtained in the experimental plot with full mineral fertilization (N15Р12К7), which represents more than a two-fold increase compared to the average yield obtained from the control. Phytopathological analysis shows that the seeds obtained from the variant with full mineral fertilization have the lowest percentage of phytopathogens (0.75-2.00%) while 22% of the seeds in the control was damaged by Tilletia. The variants with potassium fertilization (K7) stand out as the most resistant to atmospheric drought during the four-year research period, with the reported values - 58.61µS cm-1, being 12% lower, compared to the control. The highest resistance to soil drought was established for the variants with potassium (K7) and phosphorus (P12) fertilization, respectively 83.02 µS cm-1 and 83.05 µS cm-1.
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