Growth response of Douglas fir to the first early and delayed thinning

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00020702%3A_____%2F25%3AN0000025" target="_blank" >RIV/00020702:_____/25:N0000025 - isvavai.cz</a>

Result on the web

<a href="https://reference-global.com/article/10.2478/forj-2024-0023" target="_blank" >https://reference-global.com/article/10.2478/forj-2024-0023</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2478/forj-2024-0023" target="_blank" >10.2478/forj-2024-0023</a>

Result language

angličtina

Original language name

Growth response of Douglas fir to the first early and delayed thinning

Original language description

Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) is considered one of the most promising introduced tree species for use in forestry in Central Europe. The formation of vital and stable forest stands with a certain share of Douglas fir (DF) requires the application of appropriate silvicultural measures, such as thinning. The article evaluates the growth response of DF to the initial experimental thinning. Eight stands were analysed on nutrient-rich sites in the three forest vegetation zones (Querceto-Fagetum, Fagetum, Abieto-Fagetum). The analysis includes both stands dominated by DF and stands where DF is only interspersed. The thinning was applied when the dominant tree height ranged from 5 to 20 m. A dominant tree height of 10 m was used as the threshold to define well-timed thinning. The data were analysed using Bayesian hierarchical modelling, and generalized hierarchical models were employed. DF promising trees responded to early thinning with significant acceleration of radial growth, leading to improvements in height-to-diameter ratio (HDR) and crown ratio (CR) parameters. The response of DF promising trees to delayed thinning was negligible. Neither early nor delayed thinning had a detectable effect on height growth of the DF promising trees. The result confirms the necessity of initiating thinning for DF stands at the stage of thickets. The thinning should ideally begin when the dominant tree height is between 4 to 5 meters. At this stage, it is possible to positively influence diameter growth and mitigate the deterioration of individual tree stability as well as the stability of the whole stand.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

40102 - Forestry

Project

<a href="/en/project/QK22020045" target="_blank" >QK22020045: Potential of geographically non-native species in the forestry sector of the Czech Republic</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Central European Forestry Journal

ISSN

2454-034X

e-ISSN

2454-0358

Volume of the periodical

71

Issue of the periodical within the volume

1

Country of publishing house

SK - SLOVAKIA

Number of pages

12

Pages from-to

53-64

UT code for WoS article

001415646500001

EID of the result in the Scopus database

2-s2.0-85218977871