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  • Differences in growth and log quality of Douglas-Fir (Pseudotsuga menziesii (Mirb.) Franco) provenances [Elektronski vir]
    Smolnikar, Peter ; Brus, Robert ; Jarni, Kristjan
    Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) is a non-native conifer from western North America that was introduced into European forests at the end of the 19th century. Plantations of ... Douglas-fir in Europe have shown good performance, quality, and resilience to exacerbating climatic conditions. However, all these qualities strongly depend on provenance. A total of 1061 surviving trees of fifteen different Douglas-fir provenances were measured in a Slovenian provenance trial that was established within the framework of the 1966/1967 IUFRO seed collection program. We found significant differences among provenances with respect to survival rate, growth performance, and log quality. The total recorded yield of the 46-year-old stand was 602.9 m3/ha, and the average survival rate was 43%. The correlation of juvenile tree heights in 1985 and their average breast height diameters in 2017 is positive and significant. Based on vitality and diameter, the best performing provenances were Yelm and Cathlamet. The provenance with the best log quality assessed through branchiness is Jefferson (Olympic Peninsula, western Washington). All the most promising provenances for western Slovenia (Central Europe) originate from the low-altitude western coast of Washington (WACO), with the Cathlamet provenance showing the best combination of good growth, survival rate, and log quality
    Source: Forests [Elektronski vir]. - ISSN 1999-4907 (Vol. 12, iss. 3, article 287, 2021, 12 str.)
    Type of material - e-article
    Publish date - 2021
    Language - english
    COBISS.SI-ID - 53578499

    Link(s):

    https://doi.org/10.3390/f12030287
    https://www.mdpi.com/1999-4907/12/3/287
    http://dirros.openscience.si/IzpisGradiva.php?id=13718
    DiRROS - Digital repository of Slovenian research organizations
    Repository of the University of Ljubljana – RUL
    DOI

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