75 KB604 KB40 KB193820262008Čarman, RokKadunc, AlešKotar, MarijanSmrekar, Andrej12 straništevilka:2letnik:66str. 83-94ISSN:0017-2723COBISSID:2162086URN:URN:NBN:SI:doc-JVYTPCUVslZveza društev inženirjev in tehnikov gozdarstva in lesarstva SlovenijeGozdarski vestnikFagus sylvatica L.GkrošnjaoblikaPicea abies (L.) Karst.površinaprirastekvolumenDoločanje velikosti in oblike krošnje s pomočjo krošnjemera| Determination of crown size and shape using crown window|We tested two methods for measuring the volume and surface of beech and sprucetree crowns. The first method is based on an instrument called crown window, by means of which the volumes and surfaces of crowns were measured in sections, whereas the measurement according to the other method is based on geometric shapes. The sample comprised 60 beech and 40 spruce trees. We found major discrepancies in the measurements, especially with the sunny part of thebeech tree crown. The measurements tally to a greater extent with the spruce tree. Indicators of the shape of the crown mainly change with the thickness of the tree. When establishing the dependence of the increment on the crown parameters, we realized that with the beech tree the sunny crown more strongly affects the increment than the shady part of the crown, whereas it is just the opposite with the spruce treeV nalogi smo preizkusili dve metodi za izračun volumna in površine krošenj pri bukvi in smreki. Prva metoda temelji na pripomočku, imenovanem krošnjemer, s pomočjo katerega smo volumne in površine krošenj izračunali po sekcijah, druga pa na izračunu volumnov in površin krošenj na osnovi geometrijskih teles. V vzorec smo zajeli 60 dreves bukve in 40 dreves smreke. Ugotovili smo velika odstopanja v izračunih, predvsem pri bukvi v sončni krošnji. Pri smreki se izračuni bolje ujemajo. Kazalci oblike krošnje se z debelino dreves večinoma spreminjajo. Pri ugotavljanju odvisnosti med debelinskim prirastkom in parametri krošnje smo ugotovili, da pri bukvi senčna krošnja pomembneje vpliva na debelinski prirastek, kot pa sončna krošnja, pri smreki pa je ravno nasprotnoTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaZveza gozdarskih društev Slovenije