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IMPACT OF WEATHER EXTREMES TO THE PHENOLOGICAL PHASES OF BROADLEAVED TREES
Abstract
The contribution is focused on problematics of the impact of weather conditions to the phenological phases of broadleaved trees (Quercus robur L., Fagus sylvatica L., Tilia cordata Mill., Prunus spinosa L.) at the selected research areas in central Slovakia. There were recorded a 10% incidence of falling and yellowing leaves on a group of ten trees selected species. Factors taken in account were rainfall data, the number of tropical days and the length of growing season (June пїЅ August). The significant differences between years 2014 and 2015 were identified in precipitation and temperature conditions. Based on Thornthwait moisture index and climatic water balance we concluded that year 2014 was significantly wetter than the same months during period in 2015. However year 2015 was characterized by long period of drought and many tropical days. It followed that the weather extremes occurred during growing season moved to the onset of yellowing Tilia cordata, Prunus spinosa about 24пїЅ31 days earlier, and leaf fall by 15пїЅ36 days compared to year 2014. Except of Quercus robur which had balanced onset of phenological phases in both of years.
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