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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Water-use effeciency-different computation strategies
 Slípková, Romana
Water use efficiency (WUE) of the plants can be expressed as a ratio weight of biomass increment and consumed water. Two Norway spruce (Picea abies (L.) Karst) in density 1820 individuals ha-1 (FS) and 2440 individuals ha-1 (FD) in Bílý Kříž study site were studied during growing season 2003. WUE (g l-1) in this study was calculated as a ratio of total aboveground biomass increment (TB) defined by two approaches and stand transpiration. TB was defined by (i) one allometric relationship of diameter of the trunk in breast height and total aboveground biomass and (ii) as a sum of increment of stem, branch and leaves biomass allometrically obtained separately. Resulted WUE was marked as WUEI and WUEII. Mean WUEI was in FS 6,5 g l-1 and FD 14,0 g l-1; in case of WUEII FS 4,9 g.l-1 and FD 10,1 g.l-1, any difference was not significant. TBI was significantly higher than TBII in FD. We recommend WUEII approach for long term WUE evaluation.
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Plný tet: Slípková_SylvaNet WoodNet 2010 - Download fulltextPDF
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Energy balance of a mountain spruce forest. Definition, importance and utilization
 Slípková, Romana
Incident solar radiation gives a potential for utilitation and convertion of this energy. Budget between available energy and turbulent sensible and latent heat fluxes we call energy balance closure. We have studied a forest in a mountain region in the Beskydy Mountains in the Czech Republic. Amount of available energy was higher for about 29% on average than amount of turbulent fluxes. In general, we have observed a 9% higher disbalance compared to the other FLUXNET sites. This difference might be caused by overestimation of the available energy and/or underestimation of the turbulent fluxes. Both of these hypothesis will be taken into account in the next research of the energy balance closure.
Fulltext: content.csg - Download fulltextPDF
Plný tet: Slípková_Romana_SilvaNet-WoodNet - Download fulltextPDF
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