20.500.12556/RUL-188256 Razgradnja opada v gozdnih tleh Decomposition of litter in forest soil Razgradnja gozdnega opada pomembno prispeva h kroženju hranil in ogljika v gozdnih ekosistemih. V gozdnogospodarski enoti Osankarica na Pohorju smo z recipročnim poskusom primerjali razgradnjo bukovega in smrekovega opada v bukovem in smrekovem sestoju ter preverili učinek domačega okolja (angl. home-field advantage; HFA). Pripravili smo 80 poliestrskih vrečk z mrežnimi odprtinami velikosti 45 µm, po 40 z bukovim oziroma smrekovim opadom. V vsako smo zatehtali količino zračno suhega opada, ki je ustrezala 10,00 g suhe mase, in jih 6. novembra 2025 namestili neposredno nad horizont Oh oziroma, kjer ta ni bil jasno razvit, nad horizont A. Vzorčili smo po 39 dneh ob začetku zimskega obdobja, po 180 dneh, dva do tri tedne po taljenju snega, in po 242 dneh, približno tri mesece po taljenju snega, na vrhuncu vegetacijskega obdobja. Povprečna izguba mase je po posameznih vzorčenjih znašala 5,0 ± 3,2 %, 12,6 ± 2,4 % in 18,0 ± 3,0 %. Smrekov opad je pri vseh vzorčenjih izgubil več mase kot bukov, pri obeh vrstah opada pa je bila izguba mase večja v smrekovem sestoju. Povprečna dnevna izguba mase je bila najmanjša v zimskem obdobju in se je po spomladanskem segrevanju tal ponovno povečala. Splošnega učinka HFA nismo potrdili, čeprav se je prednost domačega okolja nakazala pri smrekovem opadu. Rezultati kažejo, da so razlike v zgodnji fazi razgradnje povezane tako z vrsto opada kot z lokalnim okoljem sestoja. Forest litter decomposition plays an important role in nutrient and carbon cycling in forest ecosystems. In the Osankarica forest management unit in the Pohorje, we used a reciprocal field experiment to compare the decomposition of beech and spruce litter in beech and spruce stands and to evaluate the home-field advantage (HFA). Eighty polyester mesh bags with a mesh size of 45 µm were prepared, 40 containing beech and 40 containing spruce litter. Each bag contained an amount of air-dried litter equivalent to 10.00 g dry mass and was placed directly above the Oh horizon or, where it was not clearly developed, above the A horizon on 6 November 2025. Sampling was conducted after 39 days, at the beginning of winter, after 180 days, two to three weeks after snowmelt, and after 242 days, approximately three months after snowmelt, at the peak of the growing season. Mean mass loss was 5.0 ± 3.2%, 12.6 ± 2.4%, and 18.0 ± 3.0%, respectively. Spruce litter lost more mass than beech litter at all sampling dates, and mass loss of both litter types was greater in the spruce stand. Mean daily mass loss was lowest during winter and increased again following spring soil warming. A general HFA was not supported, although a home-field advantage was indicated for spruce litter. The results indicate that differences in early-stage decomposition were associated with both litter type and local stand environment. bukev smreka organska snov tal Pohorje učinek domačega okolja beech spruce organic matter Pohorje home-field advantage true false false [Z. Mastnak] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-09-20 07:17:12 2026-09-20 07:17:20 2026-09-25 12:07:52 0000-00-00 00:00:00 2026 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 630*114(043.2) 290315 292520707 61595.pdf 61595.pdf 1 A5C2E30FBAD74A6A671DD42140459867 8472706aeb8728d3834bdb2ebf465204b8777f0eea93f4cdba7506743ccd47af 7f878c59-b4b2-11f1-8bc5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=248285 Biotehniška fakulteta 0 0 0