TAILIEUCHUNG - Báo cáo lâm nghiệp: "Mineral nutrition in relation to the Norway spruce forest decline in the region Horný Spiš (Northern Slovakia)"

Tuyển tập những bài báo cáo nghiên cứu khoa học hay nhất được đăng trên tạp chí JOURNAL OF FOREST SCIENCE đề tài: Mineral nutrition in relation to the Norway spruce forest decline in the region Horný Spiš (Northern Slovakia). | JOURNAL OF FOREST SCIENCE 53 2007 3 93-100 Mineral nutrition in relation to the Norway spruce forest decline in the region Horný Spis Northern Slovakia E. Ditmarová1 J. Kmet2 M. Jezik1 J. VÁEKA1 -Institute of Forest Ecology of the Slovak Academy of Sciences Zvolen Slovak Republic Faculty of Forestry Technical University Zvolen Zvolen Slovak Republic ABSTRACT In this contribution we present the results of analyses of selected mineral nutrients in assimilatory tissues of spruce trees at different developmental phases plants adult trees in the region Horný Spis. The very close connection between mineral nutrient cycling and other physiological processes in the plants has been well recognised. The presented analyses of mineral nutrient cycling were done within comprehensive eco-physiological research assessing the physiology and health status of spruce stands in the study area. The research was conducted directly in the stand Hliníky locality Horný Spis - two research plots 1. plot with spruce stand in advanced decline 2. control plot - without visible decline symptoms and at the same time as a pot experiment. The objective of the pot experiment was to verify the supposed negative influence of soil environment in the locality with advanced decline of spruce stands on the growth of spruce trees and their mineral nutrient conditions. The analyses of the material sampled from the stands revealed high amounts of manganese MnT that were in the toxicity range on both examined plots. Another negative finding was high amounts of toxic aluminium primarily in needles of adult trees growing on the plot with symptoms of acute stand decline. This reflects a very low value of pH H2O - pH KCl - 3 to and total exhaustion of the soil suffering moreover from the lack of soil water. As for the differences in amounts of individual macronutrients between the plot with intensive decline and the control plot no significant differences were found with the exception of Fe. On the other

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