Spruce production power dependence on changes of water content in a soil
2005
Brezina, L.(Technical University in Zvolen (Slovak Republic). Faculty of Forestry | Jarny, M.State Nature Protection of the Slovak Republic, Zvolen (Slovak Republic). Landscape Protected Area Biosphere Reserve Administration Polana)
Water is one of the limiting factors of plants existence. Also the highest production of tree species in Slovakia is mainly in connection with favorable water regime as well. Concerning changing of vegetation climate, water regime of soil is starting to change. Especially there is a risk of declining of water content utilizable by plants. It causes the degradation of the soil biotic activity, physiological weakening of the plants and decrease of their production power. The aim of this work is to investigate and to analyze the influence of the water content in soil on spruce production power. The water content was measured at a depth of 30 cm in particular months of vegetative periods during 10 years. The influence of these changes on a basal area increment of particular trees at forest ecosystems of higher altitudinal vegetation zones by regression model was investigated. Observation of the changes of the spruce basal area increment at higher altitudinal vegetation zones (above 800 m above sea level) in dependence of monthly water content in soil was done in the period of 1991-2000 in the region of Oravska Polhora.
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