Plonowanie i zawartość skrobi w bulwach ziemniaka w zależności od nawożenia NPK

TL;DRAbstract

The aim of the present study was to evaluate the influence of potassium fertilization on tuber yield and starch content of potato tubers. The field trial focused on three potato cultivars: Muza, Oda i Orłan, which were cultivated on three mineral fertilization levels: N40P17, N80P34, N120P51. Potassium elevated rates were applied proportionally to N and P in the quantitative relation of: 0, 1, 2, 3. The tuber yield of cultivars were significantly different. The highest yield was noted for Orłan cultivar– 38.34 t ha-1, and significantly lower for Oda and Muza – respectively at 35.33 and 31.83 t ha-1. The yielding depended on climatic conditions during vegetation period. The yields noted for 1998 and 2000 were comparable (46.65 t and 40.05 t ha-1) but lower precipitations in 1999 and high temperatures during the second half of vegetation significantly reduced tuber yields to 22.21 t ha-1. Increasing NP fertilization improved the tuber yield, especially for the Muza and Orlan cultivars. T

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