Relationship between parameters of the aboveground parts and root system in Norway spruce with respect to soil drainage
2002
Konopka, B. (Forest Research Inst., Zvolen (Slovak Republic))
The aboveground parts and root systems were measured on Norway spruces uprooted by wind in ten different places of Slovakia. The measurements (depth and width) on root plates closely correlated with parameters for aboveground parts in the most sites. From the comparison of Norway spruces growing on the well-drained and poorly drained sites significant differences in root system sizes were observed. The root systems were two times shallower in poorly drained sites than in well-drained ones. In poorly drained sites, the horizontal development of root biomass was detrimental to roots penetrating vertically (root systems in these sites were broader by one-third units than those in well-drained sites). This phenomenon could be related to the biomass increment of root systems with the aboveground growth and limited possibility for roots to penetrate the deeper horizons of water logged soils (insufficient oxidation). This kind of shallow root system, even though broad, is unstable and spruce stands in poorly drained sites are prone to uprooting
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