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Variabilita podkorunových srážek ve smrkových tyčkovinách v závislosti na intenzitě výchovného zásahu
Pavlištová, Hana
The thesis studied the effect of various pre-commercial thinning intensities on throughfall variability in pure Norway spruce small-pole stands. For this study, three research plots with different tending treatment intensities applied before the beginning of the 2020 growing season were utilised. Plot B was left without any silvicultural intervention as a control variant with an initial stand density of 4,500 trees/ha, while on plots A and C were performed mild (1,800 trees/ha) and heavy (1,300 trees/ha) pre-commercial thinning, respectively. Based on the results, we found the highest rainfall in plot A. Thus, the most suitable tending treatment from the viewpoint of rainfall mild (1,800 trees/ha; plot A) where the most water get to the root system.
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Spatial throughfall variability in the spruce forest
Holata, Filip
In this study, we characterized a canopy by several methods and we found the best relationship between spatialvariation of canopy and throughfall volume. We validatedthe spatial variability of throughfall volumeandwe foundthat GFr is more appropriate parameter to use for more accurate estimation of throughfall volume than LAI and LPI.
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Comparison of chemical composition of throughfall and deposited precipitation
Chaloupecký, Pavel ; Špičková, Jitka ; Fišák, Jaroslav ; Skřivan, Petr
Since June 2004 throughfall samples in beech and spruce vegetation have been taken at the observatory Milesovka. Ever since 1998 fog water samples have been taken there as well. In this paper are compared the concentrations of main ions and trace elements in throughfall and in deposited precipitation. The concentrations of main ions and trace elements in throughfal are primarily affected by the volume of samples. The highest concentrations of monitored sustances in throughfall were recorded in September and in October when the lowest rainfall totals were measured. The concentrations of monitored sustances were in throughfall mostly higher in spruce vegetation in comparison with beech vegetation. It is probably due to the thicker treetop in spruce vegetation on Milesovka observatory. Due to the thicker treetop a smaller volume of throughfall is let fall and the substances from ambient air are captured more effectively in comparison with beech vegetation. In the case of main ions the lowest concentrations were measured in fog water samples. For trace elements wasn´t data. From comparison with reference locality Lesni potok is obvious that concentrations of monitored sustances in throughfall on Milesovka exceed sharply concentrations in locality Lesni potok. This difference is considerably higher by spruce vegetation in comparison to beech vegetation which indicate that it is necessary take not only local air quality into account but also type of vegetation and thick of treetop which can very significantly contribute to the chemical composition of throughfall.
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