Agronomy Science, przyrodniczy lublin, czasopisma up, czasopisma uniwersytet przyrodniczy lublin
The effect of pluviothermal conditions on chemical composition and selected parameters of potato tubers quality was assessed in 2006–2011. Six medium late and late cultivars of edible potatoes were tested, namely Jelly, Medea, Niagara, Syrena, Ursus and Zeus. The content of dry mass in the tubers ranged widely from 17.6 to 25.9% and starch from 12.7 to 17.5%. Potato plants accumulated the highest content of dry mass and starch in the vegetation season characterized by the highest average air temperature and moderate excess of rainfall during the July–August period, whereas the lowest one in the year when the air temperature in the analogous vegetation period was the lowest and the total rainfall the highest. The mean total protein content in tubers ranged in respective years from 17.2 to 21.1 g . kg-1. A low amount of rainfall and a high air temperature advantageously affected the protein content, whereas rainfall excess, particularly in the July–August period, reduced this component accumulation. Deficiency of rainfall accompanied by high air temperature during potato vegetation period favoured common scab infections. The assessment of the effect of pluviothermal conditions on nitrate accumulation and tendency for raw tuber flesh to darken did not reveal any unanimous dependencies.
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