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Journal of Forestry Research

, Volume 29, Issue 6, pp 1591–1599 | Cite as

Short-term effects of cleaning-respacing in a silver fir-dominated stand in Romania

  • Valeriu-Norocel Nicolescu
  • Cornelia HerneaEmail author
  • Diana-Cristina Șimon
  • Matei-Nicolae Ciolan
  • Monica-Elena Barti
  • Hendrik Schubert
  • Edina Borbely
Original Paper
  • 238 Downloads

Abstract

This paper discusses the early silviculture of silver fir (Abies alba Mill.), a major softwood in Romania covering more than 294,000 ha. Three research plots (DRP1, DRP2 and DRP3) were established in a 25-year-old silver fir-dominated stand in May 2012. In DRP1 and DRP2, heavy cleaning-respacing were carried out while DRP3 was kept as a control. After the treatments in 2012, the plots had stocking between 1470 trees ha−1 (DRP2) and 10,030 trees ha−1 (DRP3), basal areas between 11.8 m2 ha−1 (DRP2) and 31.6 m2 ha−1 (DRP3). The average diameters were between 5.7 cm (DRP3) and 9.6 cm (DRP2). Measurements in September 2016 confirmed the rapid response of silver fir to cleaning-respacing. The best results in average diameter increments and basal area between 2012 and 2016 were in DRP2: 3.7 cm (36.4%) and 7.7 m2 ha−1 (85.0%) respectively. The largest diameter trees in 2012 were the best growers, and a strong linear correlation between the initial diameter of the remaining trees and their increment was established. Natural dieback of trees occurred only in DRP3 (8.6%). The selection of crop trees based on the vigour, quality, and spacing criteria during cleaning-respacing was possible as individuals stood out in terms of vigour and early diameter growth. An issue encountered in DRP1 and DRP2 was the occurrence of epicormic shoots, especially on less vigorous individuals with small crowns. However, four years after cleaning-respacing, these branches are small and do not significantly affect the wood quality.

Keywords

Abies alba Tending operations Stocking Basal area Increment 

Notes

Acknowledgements

We thank Dr. Aurica Pătrăucean (LIGNUM Forest District) and numerous undergraduate and postgraduate students from the Faculty of Silviculture and Forest Engineering (Brasov) for the field work. We also wish to express our thanks to the anonymous reviewers for their constructive criticisms.

Supplementary material

11676_2017_567_MOESM1_ESM.docx (1.5 mb)
Supplementary material 1 (DOCX 1560 kb)

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Copyright information

© Northeast Forestry University and Springer-Verlag GmbH Germany, part of Springer Nature 2017

Authors and Affiliations

  • Valeriu-Norocel Nicolescu
    • 1
  • Cornelia Hernea
    • 2
    Email author
  • Diana-Cristina Șimon
    • 3
  • Matei-Nicolae Ciolan
    • 1
  • Monica-Elena Barti
    • 1
  • Hendrik Schubert
    • 4
  • Edina Borbely
    • 1
  1. 1.Faculty of Silviculture and Forest EngineeringTransylvania University of BrașovBrașovRomania
  2. 2.Faculty of Horticulture and ForestryBanat’s University of Agricultural Sciences and Veterinary Medicine “King Michael I of Romania” from TimișoaraTimișoaraRomania
  3. 3.Bârzava Forest DistrictBârzavaRomania
  4. 4.LIGNUM Forest DistrictDărmăneștiRomania

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