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Wound healing rate in oriental beech trees following logging damage

100%

Tavankar F. , Picchio R. , Lo Monaco A. , Nikooy M. , Venanzi R. , Bonyad A. E.

Drewno : prace naukowe, doniesienia, komunikaty

2019

tom vol. 62, nr 203

5--22

Beech is the most important commercial species in the Caspian forests of Iran. Selective cutting and harvesting methods may adversely impact the quality of the residual trees, as the injuries make the trees prone to future disease, insect infestations or timber defects. Although attempts to better understand how wounds affect the residual trees have been made in many different contexts, there are still few investigations on uneven-aged forests. In this study the key objectives were to determine and model the healing rate for different wound parameters (width, length, and area of wound); to analyse the relationship between wound healing rate (WHR), tree diameter growth and tree height growth; to analyse the WHR in relation to wound position on the stem; and to analyse the relationship between WHR, width and area of wound in DBH classes and social classes, with the aim of enabling the prognosis of logging wounds. Wounded beech trees were examined immediately after selective logging and after a 5-year period. The WHR was 31.2 ±7.7 cm2 year-1. The wound width healing rate (18.4 ±3.4 mm·year-1) was significantly higher than the wound length healing rate (4.5 ±1.6 mm·year-1). Only 12% of wounds were completely closed after a 5-year period, and 15 years are necessary for the complete closure of 80% of total wounds. The ratio of wound area to stem area at wound height (RWS) showed a more pronounced effect on diameter than on height. Regression analysis showed that WHR was correlated negatively with wound area and width and positively with tree diameter growth, but no significant relationship was found between height growth and WHR parameters. The WHR was significantly higher at an upper position than at a lower one, and statistical tests showed that the tree vertical layering classes had a significant effect on WHR. Finally, it was shown that WHRs in upper-storey trees are significantly higher than in the middle and lower storeys.

Ocena procesow odnawiania, przezywania i ubywania w lasach o zroznicowanej strukturze

84%

Poznanski R. , Banas J.

Acta Agraria et Silvestria. Series Silvestris

2001

tom 39

183-194

The progress and intensity of the processes of regeneration, survival, and loss of trees in forests of a differentiated structure are presented in this paper A study concerned an area of 298.31 hectares of uneven-aged mountain forests of the Forest Experimental Station in Krynica managed by the shelterwood silvicultural system with the Swiss irregular shelterwood felling In the development of forests of a differentiated structure the increment was characterized by the highest intensity (8.83 m3/hectare/year), while the loss was less (4.14 m3/hectare/year), and the recruitment least (0.56 m3/hectare/year) intensive.

Ocena i weryfikacja zasad wyróżniania faz rozwojowych w lasach różnowiekowych w Leśnym Zakładzie Doświadczalnym w Krynicy-Zdroju

67%

Poznanski R.

Acta Agraria et Silvestria. Series Silvestris

2014

tom 52

Zmiennosc sumy miazszosci drzew na powierzchniach probnych w roznowiekowych lasach gorskich

67%

Banas J.

Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria

2004

tom 03