Influence of site conditions on physiological status of black walnut (Juglans nigra L.) stands
Salgovicova, A.(Slovak Academy of Sciences, Nitra (Slovak Republic). Institute of Forest Ecology | Kmet, J.Technical University in Zvolen (Slovak Republic). Faculty of Forestry)
The work presents the results of a study focused to the eco-physiology of the black walnut (Juglans nigra L.) in Slovakia. The research was realised on the permanent research plots (PRP) in Ivanka pri Nitre under different site conditions (on an open plot and on the shaded plot) in the years 2000-2002. The concentration of assimilation pigments (chlorophyll a, b, a + b) and the content of carbohydrates were determined spectrophotometrically. The results point out different eco-physiological responses of black walnut trees corresponding to the site conditions. Statistically significant influence of the plot and date of sampling on all studied physiological characteristics was confirmed.
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