Influence of lowland forests on subsurface salt accumulation in shallow groundwater areas

In flat sedimentary plains in areas with a sub-humid climate, as a result of deep rooting and high water uptake of trees, groundwater levels drop and subsurface salt accumulation increases under tree plantations. Tree planting has expanded globally and its effects were studied in the Great Hungarian Plain where forests are planted in a region with widespread shallow groundwater. Accumulated tree biomass was positively correlated with soil salinization rates following tree planting, being also affected by species (poplar > common oak > black locust) and stand age. Differences among tree species effects appeared to be related to their growth rates.

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