Ksztaltowanie sie zawartosci wybranych pierwiastkow w roslinach lnu oleistego [Linum usitatissimum L.] w zaleznosci od fazy rozwojowej i czesci rosliny

A single factor (variety) strict field experiment was carried out in 1999 - 2000 at the experimental station of the Department of Plant Production, Agricultural University of Krakow located at Prusy near Cracow to study the changes in selected macro-and microelement concentrations in the top parts of linseed and the uptake of these elements during vegetation at the characteristic phases of development, including also the plant parts, i.e. leaves, stems, seeds and straw. On the basis of obtained results it was demonstrated that microelement contents in the linseed top parts changed considerably with the plant growth. The levels of Cr, Zn, Cd, Fe and Mn were highest at budding, while Cr, Pb, Fe and Mn levels were lowest at full maturity phase. Linseed grown in the area unpolluted with trace elements did not reveal the ability to accumulate excessive amounts of Cr, Zn, Pb, Cu, Ni, Fe and Mn, undesired from the usefulness for consumption point of view. Cadmium, irrespective of the examined stage of plant development, revealed high capacity for an excessive accumulation in the top parts. The contents and reciprocal ratios of macroelements in plants changed variously with their growth. The highest Na and K contents were noticed at budding phase, Ca at vegetative stage (arborescent) and Mg at the initial budding. The widest Ca:P ratio and K:(Ca+Mg) ratio occurred at budding, whereas K:Na ratio at full maturity phase. Linseed accumulated macro- and microelements in the yield at various rates. Among the analysed elements Cd, Zn and Ni were taken up proportionally to increasing yields of linseed top part biomass.