Impact of soil factors on the transfer of trace elements into plants
2001
Podlesakova, E. (Vyzkumny Ustav Melioraci a Ochrany Pudy, Prague-Zbraslav (Czech Republic)) | Nemecek, J.
The factor analysis of a wide set of variables, comprising properties, which affect the trace elements (TEs) mobility and their uptake by plants, proved the possibility of reducing the number of variables to the standardized set. This set involves the total TEs content in testing plants and in soils (TO), the content of mobile (1M NH4NO3-MN) and potentially mobilizable (0.025M Na2EDTA-ED) fractions, pH, clay and humus content. The mobile species, extractable in 0.01M CaCl2 and 10 Mum texture fraction, CEC, free Fe0 and Al0 were omitted. The factor analysis proved the most expressive relation among variables in a set with the testing plant triticale - especially in the subset lacking all extremes. Two common factors explain for a group of the most mobile elements 60-72 % of the total variability of variables under study, three factors were extracted for Cu, Cr, As. The first common factor involves negatively pH (and clay) dependent mobility and plant uptake of Mn, Cd, Co, Ni, Zn and Pb. The highest weights within the F1 have the values of pH and MN. Although the weight of TEs content in plants is high too, communality values testify the fact that the degree of explanation of the TEs content by all variants decreased in the sequence Mn Co Yn Cd Pb Ni.
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