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This research was carried out based on a wide range of knowledge and research results reported due to previous studies on afforestation of degraded lands and forest species associations, in the southwestern part of the Transylvanian Plain. The existing knowledge made it possible to deepen and analyze different forest management practices, such as forest stand improvement, restoration of degraded lands through afforestation in the context of climate change. Therefore, the main objective of this research was to restore a degraded land in the south-western part of Transylvania. To achieve this goal, different forest plant communities were proposed, established and monitored over 9 years. During the research period, the development of forest plant communities was monitored in a fixed area in Viișoara, in order to determine the influence of soil type and plant community composition on the survival rate of the plants. For this purpose, the survival rates after 3, 5, 7 and 9 years after planting were calculated in relation to forest biometric data such as tree height and crown diameter. The results show that both soil type and forest plant community composition influenced the development of the species. The highest survival rates (96-99.5%) were recorded in Pinus sylvestris, Acer campestre, Hippophaë rhamnoides and Crataegus monogyna preluvosol, erodisol and luvosol. Among the 12 forest species tested, Tilia cordata, Quercus petraea and Acer campestre had the highest biometric values in terms of plant height, which ranged from 357.33 cm (Acer campestre) to 412.42 cm (Tilia cordata) along the diameter of the trunk, which varied from 6.27 cm (Quercus petraea) to 11.65 cm (Tilia cordata). [ABSTRACT FROM AUTHOR]

In order to establish the influence of species and land preparation method on the maintenance of saplings planted on degraded lands due to sheet erosion in Frata amelioration perimeter (Cluj county, Romania) we used black locust (Robinia pseudoacacia) and manna ash (Fraxinus ornus). The land preparation methods used were terraces and pits. We established the saplings maintenance degree in the first year after planting. To establish the influence of species and antierosional land preparation on the maintenance of saplings planted and which stroke roots, we placed two experiment (bifactorial). The significance of the differences between the tested variants was shown using Duncan (Tuckey) test of multiple comparisons, considering significant differences DS5%. As compared to manna ash, the black locust provided the highest saplings maintenance degree, at an insignificant difference. Terracing, as antierosional land preparation provides the highest maintenance degree at an insignificant difference as compared to the pits, no matter the species involved. The variants which provided the highest maintenance degree were manna ash x wattle fence terraces and black locust x wattle fence terraces and the lowest maintenance degree was registered by the manna ash planted in pits. [ABSTRACT FROM AUTHOR]

In order to establish the influence of species and land preparation manner on the maintenance of saplings planted on superficial erosion degraded lands in the Transylvanian Plain we used sessile oak (Quercus petraea), ash-tree (Fraxinus excelsior) and red dogwood (Cornus sanguinea). The land preparation methods used were terraces and pits. We established the saplings maintenance degree in the first six year after planting. To establish the influence of species and antierosional land preparation on the maintenance of saplings planted and which stroke roots, we placed two experiments, Coasta Mare 1 and 2 (bifactorial). Both experiments were placed so as the data could be statistically processed; showing the variabilities and their causes was done by analyzing the multifactorial variances. The significance of the differences between the tested variants was shown using Duncan (Tuckey) test of multiple comparisons, considerable difference DS5%. As compared to the sessile oak, the red dogwood and the ash-tree ensured the highest degree of maintenance, no matter the antierosional land preparation method (pits or terraces). Six years after saplings planting (2011), the antierosional land preparation in simple terraces did not provide a saplings maintenance degree superior to pit land preparation. The antierosional land preparation in simple terraces ensured, beginning with the third year after planting, a saplings maintenance degree a little higher than pits land preparation. [ABSTRACT FROM AUTHOR]