Lokalna kronologija širin branik kostanja (Castanea sativa) iz Poljanske doline : diplomsko delo - visokošolski strokovni študij

Debeljak, Gašper (avtor), Čufar, Katarina (mentor), Humar, Miha (recenzent)

Opravili smo dendrokronološke in dendroklimatološke raziskave pravega kostanja (Castanea sativa) z rastišč v Poljanski dolini. Analizirali smo širine branik 18 dreves. Iz posekanih dreves smo odvzeli kolute, jih posušili in iz vsakega odvzeli po 2 radialna vzorca, ju označili in zgladili. Izmerili smo širine branik, zaporedja širin branik pa smo sinhronizirali in datirali. S programom TSAP Win smo sestavili surovo, s pomočjo programa ARSTAN pa surovo in indeksirano (residual) lokalno kronologijo širin branik, dolgo 83 let za obdobje 1925-2008. Izračunali smo tudi značilna leta. Posebno pozornost smo posvetili drevesom, kjer je prirastek padel pod 0,5 mm, verjetno zaradi delovanja škodljivcev, ki ogrožajo preživetje pravega kostanja v Sloveniji. Dendroklimatološke analize s programom DENDROCLIM 2002 so pokazale, da padavine nimajo statistično značilnega vpliva na variiranje širin branik kostanja, temperature v oktobru preteklega in v januarju tekočega leta pa imajo statistično značilen pozitiven vpliv na variiranje širin branik. Primerjave kostanjeve kronologije s kronologijami drugih drevesnih vrst v Sloveniji so pokazale, da kostanjeva kronologija ni statistično značilno podobna kronologijam hrasta, bukve ali jelke iz različnih rastišč v Sloveniji. To nakazujejo tudi primerjave rezultatov dendroklimatoloških analiz.

• Jezik: Slovenski jezik
• Ključne besede: les, pravi kostanj, Castanea sativa, dendrokronologija, širine branik
• Vrsta gradiva: Diplomsko delo
• Tipologija: 2.11 - Diplomsko delo
• Organizacija: BF - Biotehniška fakulteta
• Kraj izida: Ljubljana
• Založnik: [G. Debeljak]
• Leto izida: 2011
• Št. strani: IX, 51 f.
• PID: 20.500.12556/RUL-602
• UDK: 630*561:630*174
• COBISS.SI-ID: 1956489
• Datum objave v RUL: 11.07.2014

DEBELJAK, Gašper, 2011, Lokalna kronologija širin branik kostanja (Castanea sativa) iz Poljanske doline : diplomsko delo - visokošolski strokovni študij [na spletu]. Diplomsko delo. Ljubljana : G. Debeljak. [Dostopano 19 april 2025]. Pridobljeno s: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=slv&id=602

Sekundarni jezik

• Jezik: Angleški jezik
• Naslov: Local tree-ring chronology of chesnut (Castanea sativa) from Poljanska dolina, Slovenia : graduation thesis - higher professional studies

Izvleček

We conducted dendrochronological and dendroclimatological investigations of European chestnut (Castanea sativa) from the sites in Poljanska dolina, Slovenia. We analyzed tree-ring widths of 18 trees. We took discs from felled trees, dried them and took 2 radial samples from each of them. These samples were labelled and sanded. We measured tree-ring widths, cross-dated and dated them. With help of TSAP Win program we constructed raw tree-ring chronology, and with help of ARSTAN program the raw and residual local chronology of tree-ring widths. The chronology of chestnut was 83 years long, and covered the period of 1925-2008. The signature years were calculated as well. Special attention was given to trees where the increment fell below 0.5 mm, possibly due to activity of pests generally endangering the survival of chestnut in Slovenia. Dendroclimatological analysis with DENDROCLIM 2002 program showed that precipitations do not have statistically significant impact on tree-ring variation in chestnut. On the other hand temperatures of previous October and current January have statistically significant positive impact on tree-ring variation. Comparisons of chestnut tree-ring chronology to the chronologies of other tree species from different sites in Slovenia have shown that the chronology of chestnut does not statistically significantly agree with chronologies of oak, beech or fir from different sites in Slovenia. This was also shown by comparing the results of dendroclimatological analyses.

• Ključne besede: wood, chesnut, Castanea sativa, dendrochronology, tree-ring widths