Published in Scientific Papers. Series E. Land Reclamation, Earth Observation & Surveying, Environmental Engineering, Vol. XIV
Written by Cristinel CONSTANDACHE, Ciprian TUDOR, Laurenţiu POPOVICI
The ecological reconstruction of degraded lands was based on the predominant use of pine species (Pinus nigra and Pinus sylvestris), resulting in pure stands or sometimes mixed with deciduous trees, with a fragile structure, prone to damage. The research was carried out during 2023-2024, in 18 research areas located on degraded lands in the Vrancea area, in stands of different ages with the aim of the knowledge of compositional and structural indicators that reflect the intensity of competitive processes. The results indicate a pronounced predisposition to disturbances in pure young stands, with a high level of compositional homogeneity and relative abundances of Scots pine. The relationship between the structural diversity index (Gini) and the coefficient of variation allowed the determination of the structure type of the stand, the correlation coefficient being significant (r=0.9923). Research has shown that mixed stands are more structurally stable than pure stands, promoting mixed species being essential in increasing the resistance of stands. The results are useful for decision-makers, the goal being to create stands with structures resistant to the action of damaging factors.
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