Assessing Black Locust Biomass Accumulation in Restoration Plantations

Forests for a Better Future: Sustainability, Innovation and Interdisciplinarity

Forests offer a solution to climate change through carbon storage and providing ecosystem services and sustainable products [...]

Allometric Models for Estimating the Height of Robinia pseudoacacia L. in Restoration Plantations

In this study, we aimed to develop height growth models using forest data with the measured total height, bole height and diameter at breast height, targeting Robiniapseudoacacia plantations of various ages, located in restoration plantations of former mining areas of a lignite center in Northwestern Greece. To achieve this goal, 24 circular plots were randomly established in plantations of different ages. Eleven models were tested for data fit, and the selection of the models was based on three statistical criteria. The developed models revealed that black locust plantations grow well, thus being an excellent species for the restoration of former mines. There is no comparison between pre- and post-mining areas, thus site quality and other aspects are not taken into account; our models give a basis for assessments of areas affected by mining.

Seed Germination and Seedling Growth of Robinia pseudoacacia Depending on the Origin of Different Geographic Provenances

Black locust (Robinia pseudoacacia) is recognised as a forest species of interest due to its multiple uses. The management of forest genetic resources and their efficient conservation suffer from variations in traits and start with seed germination. The aim of the current study was to investigate the germination of seeds obtained from plus trees selected in eight Romanian provenances, as well as to investigate the influence of the origin upon plants’ growth and development. Two experiments were undertaken to test seed germination: one treatment involved water-soaked seeds and heat/cold treatment, while the other treatment was based on sulphuric acid, at different concentrations (50, 70, 90%). The results were correlated with the morphological analysis of the seeds. Satu-Mare had the lowest germination rate within both treatments. Sulphuric acid did not improve seed germination as much as the heat treatment. The highest germination rate occurred for the water and temperature treatment on seeds from Bihor provenance (68.2%). The most distant provenance was Bihor, in inverse correlation with Bistrița Năsăud and grouped separately within the hierarchical dendrogram of cluster analysis based on the analysed parameters of the provenances investigated. The results demonstrated that the genotypes and environmental heterogeneity of the seed origin within the provenances may finally result in different performances.