Studies on the Influence of Different Nitrogen Forms on the Chemical Composition of Various Cultivars of Lupinus albus L.

The effect of nitrogen (N) forms on the chemical composition of three cultivars of Lupinus albus L. has been studied. The N form had a significant effect on accumulation of alkaloids, polyamines, and sugars dependent upon the cultivar. In general, the ammonium and nitrate (NH4 ++NO3 −) and amine (–NH2) forms in all cultivars caused visible increases in alkaloid content. In the case of cv. ‘Butan,’ the (NH4 + + NO3 −) and (NO3 −) forms caused significant increases in polyamine contents, whereas Bradyrhizobium lupini plus (NH4 + + NO3 −), N deficiency (Nd), and (NH4 +) forms caused a decrease of polyamine levels. The N forms did not influence polyamine contents as much in cvs. ‘Marta’ and ‘Multolupa.’ The Bradyrhizobium lupini plus (NH4 + + NO3 −), (NO3 −), (NH4 +), (NH4 + + NO3 −), and (–NH2) caused a decrease of total sugars in seeds of ‘Butan’ and ‘Marta’ cvs.