Аграрный вестник Урала № 09 (127) 2014Овощеводство и садоводство
LATE-FLOWERING FORM OF PRUNUSPADU: THE SPECIFICS OF DEVELOPMENT AND APPLICATION OUTLOOK
Prunuspadusisa is a valuable, decorative, medicinal and food plant. The flowers of Prunusare are often damaged by late spring frosts as a result of proanthesis. It causes irregular yield of fruit. One plant has been distinguished in natural population of Prunus, its flowering was 8 days later than of rest of this species plants. Genetic conditionality of this character is determined. The forms have been named as late and general respectively. Bud break of late form is 15 days later than of general form by accumulated effective temperatures 215.5 °С (for general form — by 83.3 °С). Floral initiation of late form comes while blossom fading of Prunus general form. Fruit ripening of late form always comes earlier than of general by later date of flowering. Defoliation of late form also starts and finishes earlier. In general, the plant of late form has shorter vegetation period. Significance differences have been identified during stage 0 °С transition of daily average temperature before budbreak and fruit formation and ripening stage. Analysis of temperature-phenological relations shows that the first stage of the later form needs to be almost three times higher amounts of active temperatures than the usual form of cherry, on the second and fourth stages of the difference in the amounts required temperature is negligible, and the third stage, fruit ripening later form is required at 300 °C, a smaller amount of active temperatures. This sorted out late form of Prunuspadusis recommended for landscape gardening and this crop selection.
Prunuspadus, phenological forms, effective temperature, selection, landscape gardening
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