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The Polish Provenances of European Larch Overperform the Expected Growth Dynamics Indicated by the Sigmoid Model

cris.virtual.author-orcid0000-0001-5915-079X
cris.virtual.author-orcid0000-0002-4860-4984
cris.virtual.author-orcid0000-0002-5801-9818
cris.virtualsource.author-orcid700a7b38-3e22-4226-9ee6-fdba15d8c519
cris.virtualsource.author-orcid944a894b-160b-4169-90d4-722afbfa282d
cris.virtualsource.author-orcid1608a5aa-340b-42e7-93a1-b9831ed54d13
dc.abstract.enThis article attempts an unusual interpretation of the observations characteristic of experiments that compare different tree species’ provenances. The focus falls on larch (Larix decidua subsp. polonica). The data came from the experiment established in 1967 at the Siemianice forest experimental station, where 21 Polish larch provenances were compared. The study’s main objective was to compare the basic estimates of growth dynamics, the maximum growth rate and acceleration, and the point in time when these values were achieved. A four-parameter sigmoid growth function was used to model the average stand basal area increments and its first and second derivatives to calculate the indicators of the growth dynamic. The models explained 98% of the observed variations resulting from the 21 inventories. Only one growth parameter showed a statistically significant difference among the compared provenances. The Góra Chełmowa provenance achieved the highest value of the maximum growth acceleration, but it was statistically significantly different only from the three underperformed provenances. However, when the average values for all the experimental plots (n = 86) were compared with those of the deterministic model (the stand volume and yield tables), the maximum growth rate and acceleration values were higher for the former. We discuss the potential factors responsible for this overperformance and point out the potential risks that arise from growth and quality metrics only when deciding on the best-performing provenances. The sigmoid growth model employed in this study might be an excellent alternative for comparing the growth dynamics among different stands or replications in experimental studies. Considering only the early results, the sigmoid growth model proves its limitations, and the conclusions reached should be treated with caution.
dc.affiliationWydział Leśny i Technologii Drewna
dc.affiliation.instituteKatedra Hodowli Lasu
dc.contributor.authorJagiełło, Radosław
dc.contributor.authorŁukowski, Adrian
dc.contributor.authorKowalkowski, Wojciech
dc.date.access2026-02-16
dc.date.accessioned2026-03-03T10:07:27Z
dc.date.available2026-03-03T10:07:27Z
dc.date.copyright2022-11-05
dc.date.issued2022
dc.description.accesstimeat_publication
dc.description.bibliographyil., bibliogr.
dc.description.financepublication_nocost
dc.description.financecost0,00
dc.description.if2,9
dc.description.number11
dc.description.points100
dc.description.versionfinal_published
dc.description.volume13
dc.identifier.doi10.3390/f13111852
dc.identifier.issn1999-4907
dc.identifier.urihttps://sciencerep.up.poznan.pl/handle/item/7585
dc.identifier.weblinkhttps://www.mdpi.com/1999-4907/13/11/1852
dc.languageen
dc.relation.ispartofForests
dc.relation.pagesart. 1852
dc.rightsCC-BY
dc.sciencecloudnosend
dc.share.typeOPEN_JOURNAL
dc.subject.enbasal area increment
dc.subject.engrowth acceleration
dc.subject.engrowth model
dc.subject.engrowth rate
dc.titleThe Polish Provenances of European Larch Overperform the Expected Growth Dynamics Indicated by the Sigmoid Model
dc.title.volumeSpecial Issue Silviculture Measures Needed to Keep Up with Changes in Forests
dc.typeJournalArticle
dspace.entity.typePublication