Response of black alder (Alnus glutinosa (L.) Gaertn.) to selective thinning of various intensitiese : a half-century study in northeastern Slovenia

Lendvai, Simon (avtor), Diaci, Jurij (avtor), Roženbergar, Dušan (avtor)

Pure black alder stands are specific and require adapted silvicultural models. To determine the best intensity of selective thinning in such stands, research plots were established in Polanski Log in 1967. Three thinning intensities were selected: control, moderate and high. These stands are presently in a mature phase. In 1967, 1973, 1979, 1983, 1993, 1998 and 2018 diameter at breast height was measured and social status, vitality, tendency, silvicultural role, crown length and overall qualitywere estimated. The differencesin black alderresponsesto thinning intensitieswere analysed and the results were compared with recommendations for selective high thinning and newer crop tree situational thinning models. Diameter increments were lower than expected regardless of thinning intensity. In moderately thinned plots and control plots diameterincrementwasthe same (0.33 cm/year); high intensity thinning plots showed higherincrement(0.37 cm/year). Dominant trees had slightly higherincrementregardless of thinning model. Compared to thinning models with a lower number of crop trees, density and basal area of studied stands were significantly higher and diameter increments lower. We attribute the small diameter increments and small differences among thinning modelsto insufficient intensity and partially to inconsistent thinning. The resultsindicate that thinning must be of higher intensity and the largest-diameter trees which display the best vigour, quality, tendency, and which have well formed, long crowns, must be promoted from the beginning.

• Jezik: Angleški jezik
• Ključne besede: black alder, Alnus glutinosa (L.) Gaertn., thinning, diameter increment, traditional selection model, situational thinning model, Slovenia
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: BF - Biotehniška fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2020
• Št. strani: Str. 367-378
• Številčenje: Vol. , iss. 7/8
• PID: 20.500.12556/RUL-121419
• UDK: 630*24
• ISSN pri članku: 0373-1332
• DOI: 10.31298/sl.144.7-8.3
• COBISS.SI-ID: 30073859
• Datum objave v RUL: 08.10.2020

Gradivo je del revije

• Naslov: Šumarski list
• Skrajšan naslov: Šumar. list
• Založnik: Savez inženjera i tehničara šumarstva i drvne industrije Hrvatske
• ISSN: 0373-1332
• COBISS.SI-ID: 30498

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.
• Začetek licenciranja: 08.10.2020

Sekundarni jezik

• Jezik: Hrvaški jezik
• Naslov: Odziv crne johe (Alnus glutinosa (L.) Gaertn.) na različite intenzitete selektivne prorjedee : pedesetgodišnja istraživanja u sjeveroistočnoj Sloveniji
• Ključne besede: redčenje, tradicionlani model izbiranja, model situacijskega redčenja, črna jelša, Alnus glutinosa (L.) Gaertn., Slovenija