Izvorni znanstveni članak
https://doi.org/10.15177/seefor.19-14
Regeneration and Early Tending of Black Locust (Robinia pseudoacacia L.) Stands in the North-West of Romania
Valeriu-Norocel Nicolescu
; Transilvania University of Brasov, Faculty of Silviculture and Forest Engineering, Șirul Beethoven 1, RO-500432 Brasov, Romania
Cornelia Buzatu-Goanță
orcid.org/0000-0003-0849-0254
; Banat’s University of Agricultural Sciences and Veterinary Medicine "King Michael I of Romania", Faculty of Horticulture and Forestry, Calea Aradului 119, RO-300645 Timișoara, Romania
Debbie Bartlett
; University of Greenwich, Faculty of Engineering and Science, University of Greenwich, Kent ME4 4TB, United Kingdom
Nicolae Iacob
; National Forest Administration-ROMSILVA, Săcueni Forest District, Bihor County Branch, RO-417435 Săcueni, Romania
Sažetak
Background and Purpose: The aim of this study is to highlight the importance of black locust (Robinia pseudoacacia L.), a North American-originating tree species of major importance in Romania, in extreme site conditions such as sand dunes. In this respect, a Research and Development (R&D) project has been carried out in Carei-Valea lui Mihai Plain (north-west of Romania) since 2016.
Materials and Methods: Three sub-compartments were selected in IV Valea lui Mihai Working Circle, Săcueni Forest District: two pure natural regenerations by root suckers of black locust at different ages (sub-compartments 3B and 52A%) and a mixed black locust - black cherry stand (sub-compartment 23D). Biometrical measurements and analyses as well as biomass estimations were performed. A thorough statistical analysis using the data on initial, extracted and residual trees/stands was also performed.
Results: The main outputs of the project are as follows: (1) Black locust was established naturally by root suckers and the stocking of newly established stands can be as high as 50,000 suckers·ha-1; (2) The initial growth of black locust regeneration is quick and the young regeneration can close the canopy in 1-2 years, resulting in an appropriate dune fixation and wind erosion control; (3) The young pure or mixed black locust-dominated stands are left untended until the first cleaning-respacing (mean diameter 5-6 cm), when the stand shows high stocking/density and a wide variation in tree size. This intervention is from below, heavy (intensity over 25% by number of trees or basal area) and of negative selection type, removing mostly low Kraft’s class, dead or dying, and defective trees.
Conclusions: This R&D project has shown the high potential of black locust to establish naturally by root suckers after a low coppice cut and stump removal, as well as the fast initial growth of regenerated black locust. The quick canopy closure of young regeneration results in an appropriate dune fixation and wind erosion control.
Ključne riječi
black locust; natural regeneration; release cutting; cleaning-respacing; initial growth
Hrčak ID:
229489
URI
Datum izdavanja:
2.12.2019.
Posjeta: 712 *