Home > Search Results: "SilvaNet-WoodNet 2010. Sborník souhrnů ze studentské vědecké konference 26. října 2010"
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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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