Soil water regime analysis in spruce ecosystem in relation to its disponibility towards drought.
Title:
Soil water regime analysis in spruce ecosystem in relation to its disponibility towards drought.
Author:
Ladislav Tužinský
Appeared in:
Casopis Beskydy
Paging:
Volume 2 (2009) nr. 1 pages 77-84
Year:
2009
Contents:
Climatic changes, especially increase in the air temperature, decrease of precipitation totals and increase in potential evapotranspiration can be observed at high altitudes, too. This results in alternation of variously long humid and dry periods, which in case of the mountain spruce stands reduces or even disables the transport of available water and nutrients for plants.Moisture regime with a very good available water supply is generally limited only to winter season and for a short time to the beginning of the vegetation season, too. The greatest changes in moisture can be observed especially in summer (July, August).In case of dry and warm periods occurrence, in consequence of increased evapotranspiration (>5 mm.day-1), mainly in the process of water use by trees, the intensive loss in the soil water in a relatively short time can be observed. Consequently, the hydropedological cycles with limited available water storage take part. The biggest danger threatens the spruce resulting from the insufficient available water supply in the upper layers of the soil, where the occurrence of sucking roots is the highest. In the case of a long contact loss of roots and capillary water the physiological weakening, worsening of the health conditions or even liquidation of the spruce stands can be observed.
Journal description