Our research assessed the accumulation of minerals (K, Ca, Mg, Fe, Zn and Mn) in lettuceunder the influence of treatments with biocompatible magnetic fluids. We used magnetic fluid based onwate, with saturation magnetization. The magnetic fluid was administered onleaves in four watery dilutions: 0.05%, 0.1%, 0.5% and 1% and compared with a control variant. Thecontent of K, Mg, Ca and Fe was positively influenced by the magnetic fluid, in a proportionality relationwith the magnetite concentration. At the same time, we noted that the content of Zn and Mn decreasedwith the increase in magnetic fluid concentration.Multivariate statistical analysis highlights theassociation of the distribution of minerals in lettuce with the concentrations of magnetic fluid used.Nevertheless, their distribution is also the result of interspecific relations, positive and negative, amongelements. The analysis shows very significantly positive correlations between K – Mg (r = 0.970), K – Fe(r = 0.991), Fe – Mg (r = 0,973) and very significantly negative between K – Zn (r = -0.915), K – Mn (r= -0.984), Mg – Mn (r = -0,976), Fe – Mn (r = - 0.992). Evaluation of results through cluster analysisreveals the distinct position of the variants with magnetic fluids as compared to the control variant, inrelation to the mineral elements determined. The cophenetic coefficient with the determined value of0.9538 indicates that the dendrogram reflects the similarity structure of the data obtained, with highdegree of significanc.

magnetic fluids, magnetite, lettuce, mineral elements, correlations, cophenetic index

Presentation: oral