engleski

Black Locust (Robinia pseudoacacia L.), a non-native tree species integrated in European forests and landscapes: An overview

Black locust (Robinia pseudoacacia L.), a North-American tree species originating from the eastern half of the continent, has been introduced and become naturalised in all sub-Mediterranean and temperate regions of the world, now rivalling poplar as the second most planted broadleaved tree species worldwide, after eucalypts. This expansion is due to the fact that black locust is an economically important multipurpose tree, as wood producer, fodder producer, honey producer, as a source of bio-oil, for biomass production and carbon sequerstation, soil stabilization, erosion control, re-vegetation of landfills, mining areas and wastelands, in biotherapy, landscape architecture, etc. In Europe, it grows best on near neutral, well drained but not dry soils, such as sandy ones. It is a strong light demanding and is intolerant of competition. Black locust is mostly regenerated vegetatively by root suckers using simple coppice system, considered as the most cost-effective management system. It is also regenerated, on a much lower scale, by stool sprouts. Its early silviculture in production forests includes one-two release cutting, targeting the protection of root suckers against stump shoots, as well as two cleaning-respacing, carried out to remove low-quality stems, to reduce number of shoots per stool, to adjust spcing between root suckers and reduce stocking. In addition, two mixed (from above and below) and moderate thinning are carried out in black locust stands. Attention is focused on the crop trees (e.g. cylindrical, with straight grainn, monopodial growth, with healthy and dense foliage), selected among the best individuals. Rotation age in black locust stands depends on the targer wood assortment and ranges between 12-15 years (fence posts) and 25-30 (35) years (vine props, lumber, veneer).

Black locust biology, black locust ecology, silvicultural systems.

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