Abstract
The purpose. To study influence of forms, methods of entering zinc on formation of yield and quality of grain of winter soft wheat. Methods. Field, laboratory. Concomitant observation and analysis are executed by standard methods in accordance to standard procedures. Statistical analysis of the gained results was carried out with the use of package of programs Excel and Statistika, methods of dispersive, correlation and regression analysis. Results. At entering N90P60K40 in structure of which superphosphate is modified with inoculated zinc coplexonate on the basis of hydroxyethylenedendiphosphonic acid (HEDP), increase of yield made 20,2 % against alternative without fertilizing, including 6,4 % due to zinc. It is expedient to add zinc in the form of its coplexonate with HEDP, increase of yield in comparison with zinc sulphate — 0,16 t/hectare, and over-all share of influence of that factor — 14%. Entering zinc coplexonate under presowing cultivation in dose of 2 kg/hectare had no advantage as compared to single machining of plants in tillering stage in dose of 250 g/hectare, but transmission of that operation on phase of stem growth provided essential increase of yield (0,2 t/hectare at HCP0,95=0,18). Conclusions. Foliar top dressing with solution of zinc coplexonate (250 g/hectare) increased productivity of grain of winter wheat with the greatest effect at 2-fold machining in tillering stage and stem growth; accretion made 0,2–0,54 t/hectare. Efficiency of using Zn in droughty conditions of South Ukraine on 75,7–96 % is determined by hydrothermal conditions of spring vegetation, but thus the microelement promotes resistance of plants of winter wheat against temperature stress. Concentration of zinc in grain of test alternatives oscillated within the limits of 18,4–22,1 mg/kg (in control — 14,5 mg/kg).
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