Potassium content in living bark, cambium and wood in relation to electrical resistance and tree condition in the Silver fir (Abies alba Mill.)
1995
Krizaj, B. (Ljubljana Univ. (Slovenia). Biotechnical Fac., Wood Science and Technology Dept.) | Stupar, J. (Jozef Stefan Inst., Ljubljana (Slovenia))
The concentrations of potassium were determined in: (a) the last formed wood, (b) the vascular cambial zone with conductive (noncollapsed) phloem, (c) the youngest nonconductive (collapsed) phloem and the (d) oldest nonconductive phloem, by atomic absorption flame spectroscopy in three unaffected and three heavily affected silver fir (Abies alba Mill.) trees. A commercial conditiometer and own devised Tree Tester were used to determine the electrical resistance (ER). The relationship between the ER of living tissues and K content was investigated. The tissues of unaffected trees were generally characterized by a higher K content and corresponding lower ER. In all trees the K content was highest and ER lowest in the vascular cambial zone with conducting phloem, followed by nonconducting phloem and youngest xylem.
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