Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 535530
Title Groei en productie van Japanse lariks in Nederland
Author(s) Jansen, J.J.; Oosterbaan, A.; Mohren, G.M.J.; Ouden, J. van
Source Wageningen : Wageningen University & Research (FEM Groei en Productie Rapport 2018–1) - 120
Department(s) Forest Ecology and Forest Management
Alterra - Nature and society
Publication type Research report
Publication year 2018
Abstract From 1934 to 1996 growth and yield research was done on Japanese larch in the Nether-lands. This includes studies by Becking and by the Dorschkamp/IBN research institute. Together with the permanent sample plots from the timber prognosis system HOSP, all this comprises a dataset of 151 plots with 835 recordings. For the development of top height htop with age t Cieszewski’s model with site index h50 and 3 additional parameters fitted best. The diameter development up to stand height of 7 m was best described with the model by Jansen et al. based on htop and initial density N0.From a stand height of 7 m and up, the basal area increment iG was best described by a power func-tion based on htop, calendar year yor, h50 and S%. For S% > 20.6 the basal area increment drops slightly with increasing S%. The model contains a correction factor for yor; for the period since 1981, this factor is 18 % above the level of the period 1934 till 1980. The effect of thinning on the diameter after thinning was modelled with a modified La Bastide-Faber model. With all models together, a stand projection model was constructed, which describes the measured stand development reasona-bly well. For several models, the parameters differ for the forest region North and South Nether-lands. The model was used to construct yield tables for both regions with five site classes and five thinning intensities.
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