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ŠUMARSKI LIST 9-10/2011 str. 32     <-- 32 -->        PDF

V. Račko, M. Saniga, I. Čunderlík: THE IMPACT OF SILVICULTURALTREATMENTS ON THE STRUCTURE ...Šumarski list br. 9–10, CXXXV (2011), 437-448
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SAŽETAK: Neprava srž (crveno srce) i poremećaji u rastu debla bukovih
stabala glavni su fenomeni koji značajno utječu na kvalitetu sirovog drva,
a time značajno smanjuju financijsku vrijednost izrađenih sortimenata (Bec ker
et al 2005). U posljednje vrijeme velik broj autora istražuje utjecaj uzgajivačkih
metoda (njege i obnove sastojina) na kvalitetu drvnih sortimenata s
gledišta pojavnosti neprave srži. (Knoke 2003, Kudra et al. 2003, Prka 2003,
Schmidt et al. 2005, Kadunc 2006). Ranija istraživanja pokazala su da dob
sastojine, promjer debla i sastojinski oblik (Mahler a Höwecke 1991) imaju
značajan utjecaj na veličinu i učestalost pojavnosti neprave srži. Održavanje
aktivnog parenhima u stanju visoke vlažnosti na presjeku bukovog debla ovisno
je o volumenu krošnje stabla. Intenzivne visoke prorede utječu na manju