Title of article :
The effect of drought on stem volume changes of Norway spruce
Author/Authors :
Zajíčková, L. Czech University of Life Sciences Prague - Faculty of Forestry and Wood Sciences - Department of Forest Protection and Wildlife Management, Czech Republic , Nádraská, M. Czech University of Life Sciences Prague - Faculty of Forestry and Wood Sciences - Department of Forest Protection and Wildlife Management, Czech Republic , Matoušek, P. Czech University of Life Sciences Prague - Faculty of Forestry and Wood Sciences - Department of Forest Protection and Wildlife Management, Czech Republic
Abstract :
The relationship between stem volume changes of Norway spruce and water availability has been studied during the growing season from April to October 2009 in a forest in central Czech Republic. The results proved that lack of soil water during short period has a high impact on daily stem volume changes. We analyzed the variability of daily stem diameter of Norway spruce by comparing daily maximum, minimum, its difference and average diameter and with environmental variables related to weather conditions and soil water content. We found out that the daily maximum, minimum and its difference were closest related to daily average water vapor deficits (VPD) and precipitation. However, the degree of correlation between stem diameter changes and soil water availability was low, there is still a high dependence on the amount of precipitation
Keywords :
water deficit , stem increment changes , soil moisture , dendrometers
Journal title :
Scientia Agriculturae Bohemica
Journal title :
Scientia Agriculturae Bohemica
