Concentrations of nutritional and trace elements in needles of Norway spruce (Picea abies [L.] Karst.) as functions of the needle age class

摘要: The endogenous concentrations of the essential elements Ca, Cl, Cu, Fe, K, Mg, Mn, N, P and Zn, nonessential Al, As, Ba, Br, Co, Cr, Cs, Hg, I, La, Na, Rb, Sb, Sc, Si Sr were determined in 5 successive needle age classes. 40 mature spruce trees from 6 different sites investigated individually. A given element usually shows smooth changes with class t. Trees on a site have similar dynamic behaviour. same holds for means. can be approximated by functions c=f(t). Three types are required to describe behaviour 3 groups that increase t, one decrease described type function at all sites, even if its concentration differs widely. Exceptions Co which change decreasing low an increasing high concentrations. Further irregulatities found some Ba. These findings corroborated multivariate statistical analysis.