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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Environmental drivers interactively affect individual tree growth across temperate European forests
Maes, Sybryn L. ; Perring, Michael P. ; Vanhellemont, Margot ; Depauw, Leen ; Bulcke, Jan Van den; Brūmelis, Guntis ; Brunet, Jörg ; Decocq, Guillaume ; Ouden, Jan den; Härdtle, Werner ; Hédl, Radim ; Heinken, Thilo ; Heinrichs, Steffi ; Jaroszewicz, Bogdan ; Kopecký, Martin ; Máliš, František ; Wulf, Monika ; Verheyen, Kris - \ 2019
Global Change Biology 25 (2019)1. - ISSN 1354-1013 - p. 201 - 217.
basal area increment - climate change - Fagus - Fraxinus - historical ecology - nitrogen deposition - Quercus - tree-ring analysis

Forecasting the growth of tree species to future environmental changes requires a better understanding of its determinants. Tree growth is known to respond to global-change drivers such as climate change or atmospheric deposition, as well as to local land-use drivers such as forest management. Yet, large geographical scale studies examining interactive growth responses to multiple global-change drivers are relatively scarce and rarely consider management effects. Here, we assessed the interactive effects of three global-change drivers (temperature, precipitation and nitrogen deposition) on individual tree growth of three study species (Quercus robur/petraea, Fagus sylvatica and Fraxinus excelsior). We sampled trees along spatial environmental gradients across Europe and accounted for the effects of management for Quercus. We collected increment cores from 267 trees distributed over 151 plots in 19 forest regions and characterized their neighbouring environment to take into account potentially confounding factors such as tree size, competition, soil conditions and elevation. We demonstrate that growth responds interactively to global-change drivers, with species-specific sensitivities to the combined factors. Simultaneously high levels of precipitation and deposition benefited Fraxinus, but negatively affected Quercus’ growth, highlighting species-specific interactive tree growth responses to combined drivers. For Fagus, a stronger growth response to higher temperatures was found when precipitation was also higher, illustrating the potential negative effects of drought stress under warming for this species. Furthermore, we show that past forest management can modulate the effects of changing temperatures on Quercus’ growth; individuals in plots with a coppicing history showed stronger growth responses to higher temperatures. Overall, our findings highlight how tree growth can be interactively determined by global-change drivers, and how these growth responses might be modulated by past forest management. By showing future growth changes for scenarios of environmental change, we stress the importance of considering multiple drivers, including past management and their interactions, when predicting tree growth.

Litter quality, land-use history, and nitrogen deposition effects on topsoil conditions across European temperate deciduous forests.
Maes, S.L. ; Blondeel, Haben ; Perring, M.P. ; Depauw, Leen ; Brümelis, G. ; Brunet, J. ; Decocq, Guillaume ; Ouden, J. den; Härdtle, W. ; Hédl, Radim ; Heinken, Thilo ; Heinrichs, S. ; Jaroszewicz, B. ; Kirby, K. ; Kopecký, Martin ; Máliš, František ; Wulf, M. ; Verheyen, K. - \ 2019
Forest Ecology and Management 433 (2019). - ISSN 0378-1127 - p. 405 - 418.
Topsoil conditions in temperate forests are influenced by several soil-forming factors, such as canopy composition (e.g. through litter quality), land-use history, atmospheric deposition, and the parent material. Many studies have evaluated the effects of single factors on physicochemical topsoil conditions, but few have assessed the simultaneous effects of multiple drivers. Here, we evaluate the combined effects of litter quality, land-use history (past land cover as well as past forest management), and atmospheric deposition on several physicochemical topsoil conditions of European temperate deciduous forest soils: bulk density, proportion of exchangeable base cations, carbon/nitrogen-ratio (C/N), litter mass, bio-available and total phosphorus, pHKCl and soil organic matter. We collected mineral soil and litter layer samples, and measured site characteristics for 190 20 × 20 m European mixed forest plots across gradients of litter quality (derived from the canopy species composition) and atmospheric deposition, and for different categories of past land cover and past forest management. We accounted for the effects of parent material on topsoil conditions by clustering our plots into three soil type groups based on texture and carbonate concentration. We found that litter quality was a stronger driver of topsoil conditions compared to land-use history or atmospheric deposition, while the soil type also affected several topsoil conditions here. Plots with higher litter quality had soils with a higher proportion of exchangeable base cations, and total phosphorus, and lower C/N-ratios and litter mass. Furthermore, the observed litter quality effects on the topsoil were independent from the regional nitrogen deposition or the soil type, although the soil type likely (co)-determined canopy composition and thus litter quality to some extent in the investigated plots. Litter quality effects on topsoil phosphorus concentrations did interact with past land cover, highlighting the need to consider land-use history when evaluating canopy effects on soil conditions. We conclude that forest managers can use the canopy composition as an important tool for influencing topsoil conditions, although soil type remains an important factor to consider.
Long-term effects of wild ungulates on the structure, composition and succession of temperate forests
Ramirez Chiriboga, J.I. ; Jansen, P.A. ; Ouden, J. den; Goudzwaard, L. ; Poorter, L. - \ 2019
Forest Ecology and Management 432 (2019). - ISSN 0378-1127 - p. 478 - 488.
Ungulates in temperate regions are increasing in range and abundance, leading to concerns that browsing and trampling reach levels that hamper tree recruitment and forest regeneration. However, studies that actually quantify the long-term effects of ungulates on forest succession are scarce. Here, we use a chronosequence of ungulate exclosures (fenced) and control (unfenced) plots to assess the long-term effects of ungulates on forest structure, diversity and litter depth in forests on poor sandy soils at the Veluwe, the Netherlands, which have moderate ungulate densities ( = 13.6 ungulates km−2). We surveyed the vegetation in 27 paired fenced and unfenced plots that ranged from 1 to 33 years old, and measured seven variables to characterize forest structure (stem density, canopy cover and understory vegetation cover), composition (Shannon diversity, species richness and conifer proportion) and leaf litter depth. We found on average that fencing compared to unfencing reduced understory vegetation cover (fenced = 64.3 ± 20.2%, unfenced = 80.3 ± 19.4%), increased canopy cover (fenced = 47.4 ± 30.1%, unfenced = 29.3 ± 21.1%), tree species richness (fenced = 4.5 ± 1.3 spp., unfenced = 2.7 ± 1.2 spp.), tree Shannon diversity (fenced = 1.1 ± 0.3 index, unfenced = 0.7 ± 0.3 index) and litter layer depth (fenced = 4.4 ± 1.4 cm, unfenced = 2.4 ± 1.1 cm). While fenced plots developed woody vegetation with palatable broadleaved species such as Betula pendula, Betula pubescens, Prunus serotina, and Quercus robur, unfenced plots were not associated with any particular tree species. Our results show that current ungulate densities in this system have pronounced long-term effects on forest structure, composition and litter depth, implying that ungulates can slow down natural succession of temperate forest, from light demanding to shade tolerant species, by keeping the system in an arrested state consisting of light demanding species.
Hoeveel wild kan een terrein verdragen?
Ouden, J. den; Leidekker, Jakob - \ 2018
Vakblad Natuur Bos Landschap 15 (2018)149. - ISSN 1572-7610 - p. 28 - 31.
FEM growth and yield data monocultures - Norway spruce (revised version)
Jansen, J.J. ; Oosterbaan, A. ; Goudzwaard, L. ; Oldenburger, J.F. ; Boosten, M. ; Mohren, G.M.J. ; Ouden, J. den - \ 2018
growth and yield - even-aged monoculture forest - tree diameter - tree height - crown class - coordinates stem positions - age - top height - dominant height - monitoring - Norway spruce - Picea abies - dominant diameter
In this revised edition, 28 test plots were added from the former Stichting Industriehout. This database is part of the FEM growth and yield database, a collection of growth and yield data from even-aged monocultures.
FEM growth and yield data Monocultures - Black alder
Boosten, M. ; Jansen, J.J. ; Oosterbaan, A. ; Copini, P. ; Oldenburger, J.F. ; Mohren, G.M.J. ; Ouden, J. den - \ 2018
growth and yield - even-aged monoculture forest - tree diameter - tree height - crown class - coordinates stem positions - age - top height - dominant height - dominant diameter - monitoring - Black Alder - Alnus glutinosa
This database is part of the FEM growth and yield database, a collection of growth and yield data from even-aged monocultures. In the first edition of the database, the data of Black Elder were part of the dataset “FEM growth and yield data Monocultures – Other species”.
FEM growth and yield data monocultures - Other species (revised version)
Goudzwaard, L. ; Jansen, J.J. ; Oosterbaan, A. ; Oldenburger, J.F. ; Boosten, M. ; Mohren, G.M.J. ; Ouden, J. den - \ 2018
growth and yield - even-aged monoculture forest - tree diameter - tree height - crown class - coordinates stem positions - age - top height - dominant height - Black locust - Robinia pseudocacia - European hornbeam - Carpinus betulus - European larch - Larix decidua - Elm - Ulmus species - Eastern white pine - Pinus strobus - Lodgepole pine - Pinus contorta - Maritime pine - Pinus maritima - Port Orford cedar - Chamaecyparis lawsoniana - Sweet chestnut - Castanea sativa - Serbian spruce - Picea omorika - Silver fir - Abies alba - Western hemlock - Tsuga hetrophylla - Western red ceder - Thuja plicata - Wild cherry - Prunus avium
In this version 13 new plots of White elder and 13 new plots of Sitka spruce were added, both from the collection of the former Stichting Industriehout. This database is part of the FEM growth and yield database, a collection of growth and yield data from even-aged monocultures.
FEM growth and yield data Monocultures - Poplar (2nd revised version)
Mohren, G.M.J. ; Goudzwaard, L. ; Jansen, J.J. ; Schmidt, P. ; Oosterbaan, A. ; Oldenburger, J.F. ; Ouden, J. den; Copini, P. - \ 2018
growth and yield - even-aged monoculture forest - tree diameter - tree height - crown class - coordinates stem positions - age - mean height - spacing - without thinning - systematic thinning - monitoring - Poplar - Aspen - Populus species - Populus x canadensis - Populus x interamericana - Populus alba - Populus tremula
In this new version, the data of 227 test plots of the former Stichting Industriehout were added. Also the location information of the test plots of the Dorschkamp/IBN were added. This database is part of the FEM growth and yield database, a collection of growth and yield data from even-aged monocultures.
Opbrengsttabellen Nederland 2018
Jansen, Hans ; Oosterbaan, Anne ; Mohren, G.M.J. ; Goudzwaard, L. ; Ouden, J. den; Schoonderwoerd, H. ; Thomassen, E.A.H. ; Schmidt, P. ; Copini, P. - \ 2018
Wageningen : Wageningen Academic Publishers - ISBN 9789086868766 - 172
In deze bundel zijn opbrengsttabellen van 15 boomsoorten opgenomen. In vergelijking met de tot nu toe geldende opbrengsttabellen uit 1996, bevat deze bundel meer soorten, meer dunningregimes, en zijn alle tabellen gebaseerd op Nederlandse meetgegevens. Voor 10 soorten zijn tabellen met zowel een matige als sterke dunning opgenomen. Voor de Japanse Lariks zijn twee regionale tabellen opgenomen. De populier heeft in deze bundel een tabel voor bomen in lijnbeplanting, naast de tabellen voor bos met diverse plantverbanden. Per soort is het rapport van de onderliggende studie weergegeven. Al deze studies volgden in grote lijnen de studie Groei en productie van douglas in Nederland. Becking's dunningproeven ontsloten. In vergelijking met de studies uit 1996, blijkt enerzijds de hoogtegroei per boniteit te verschillen (slechte boniteiten starten lager dan goede boniteiten, maar halen de groei later deels in). Anderzijds blijk de range tussen de beste en slechtste boniteit vaak ruimer dan in de eerdere studies.
Groei en productie van zwarte els in Nederland
Jansen, J.J. ; Oosterbaan, A. ; Mohren, G.M.J. ; Copini, P. ; Ouden, J. den - \ 2018
Wageningen : Wageningen University & Research (FEM Groei en Productie rapport 2018-10) - 47
In the Netherlands growth and yield research on black alder was done on a limited scale from 1965 to 1990. This regards two studies by the Dorschkamp/IBN research institute; together with the permanent sample plots from the timber prognosis system HOSP, this comprises a dataset of 14 plots with 59 recordings. In addition, the information from 518 stands of the Fourth National Forest Inventory was used. For the development of top height htop with age t Jansen’s et al. polymorphic model with site index h50 and four additional parameters fitted best. The diameter at a height of 7 m (d7) was estimated from data of the Fourth National Forest Inven-tory. The diameter development up to stand height of 7 m was described with a model of Jansen et al., a power function in htop and the estimated value for d7. From a stand height of 7 m upwards, the basal area increment (iG) was also described by Jansen’s et al. model based on a power function with t, year of recording (yor), and the stand density of Hart (S %). For S% > 15.7 the basal area increment decreases non-linear with increasing S %. The model contains a correction factor for yor, although this was not significant, as the year of recording (yor), turned out to be not significant. The effect of thinning on the diameter after thinning was modelled with the La Bastide-Faber model. The models were used to construct a yield table with five site classes and one thinning intensity.
Groei en productie van ruwe berk in Nederland
Jansen, J.J. ; Oosterbaan, A. ; Mohren, G.M.J. ; Ouden, J. den - \ 2018
Wageningen : Wageningen University & Research (FEM Groei en Productie rapport 2018-13) - 41
In the Netherlands growth and yield research on silver birch was done from 1982 to 1994. This includes studies by the Dorschkamp/IBN research institute and by Wageningen University. To-gether with the permanent sample plots from the timber prognosis system HOSP, this comprises a dataset of 43 plots with 132 recordings. For the development of top height htop with age t Cieszewski’s polymorphic model with site index h50 and three additional parameters fitted best.The diameter at a height of 7 m (d7) was estimated with the plot data and with the data of the Fourth National Forest Inventory, and the average of both estimates was chosen. The diameter develop-ment up to stand height of 7 m was described with a model of Jansen et al., a power function in htop and the estimated value for d7. From a stand height of 7 m upwards, the basal area increment (iG) was also described by Jansen’s et al. model based on a power function with h50, t, year of recording (yor), and the stand density of Hart (S %). For S% > 19.5 the basal area increment decreases non-lin-ear with increasing S %. The model contains a correction factor for yor, although this was not signifi-cant, as the year of recording (yor), turned out to be not significant. The effect of thinning on the di-ameter after thinning was modelled with the La Bastide-Faber model.The models were used to construct a yield table with five site classes and one thinning intensity.
Groei en productie van gewone esdoorn in Nederland
Jansen, J.J. ; Oosterbaan, A. ; Mohren, G.M.J. ; Ouden, J. den - \ 2018
Wageningen : Wageningen University & Research (FEM Groei en Productie rapport 2018-12) - 41
In the Netherlands growth and yield research on sycamore was done from 1976 to 2001. This includes studies by the Dorschkamp/IBN research institute and by Wageningen University. To-gether with the permanent sample plots from the timber prognosis system HOSP, this comprises a dataset of 32 plots with 113 recordings. For the development of top height htop with age t Cieszewski’s polymorphic model with site index h50 and three additional parameters fitted best.The diameter development up to stand height of 7 m was described with a model of Jansen et al., a power function in htop and initial spacing (N0). From a stand height of 7 m upwards, the basal area in-crement (iG) was described by Jansen’s et al. model based on a power function with htop, t, year of re-cording (yor), and the stand density of Hart (S %). For S% > 16.3 the basal area increment decreases non-linearly with increasing %. The model contains a correction factor for yor, although this was not significant, as the year of recording (yor), turned out to be not significant. The effect of thinning on the diameter after thinning was modelled with the La Bastide-Faber model.The models were used to construct a yield table with five site classes and one thinning intensity.
Groei en productie van es in Nederland
Jansen, J.J. ; Goudzwaard, L. ; Oosterbaan, A. ; Mohren, G.M.J. ; Ouden, J. den - \ 2018
Wageningen : Wageningen University & Research (FEM Groei en Productie rapport 2018-11) - 43
In the Netherlands growth and yield research on ash was done from 1949 to 1988. This in-cludes studies by the Dorschkamp/IBN research institute and by Wageningen University. Together with the permanent sample plots from the timber prognosis system HOSP, all this comprises a da-taset of 41 plots with 150 recordings. For the development of top height htop with age t, Cieszewski’s polymorphic model with site index h50 and three additional parameters fitted best.The diameter development up to stand height of 7 m was described with a linear function in htop and tree distance. From a stand height of 7 m and up, the basal area increment (iG) was described by Jan-sen’s et al. model based on a power function with h50, htop, t, year of recording (yor), and the stand density of Hart (S %). For S% > 16.7 the basal area increment strongly decreases non-linearly with in-creasing %. The model contains a correction factor for yor, but this was not significant, nor was htop. The effect of thinning on the diameter after thinning was modelled with a modified La Bastide-Faber model. The models were used to construct yield tables for with five site classes and one thinning in-tensity.
Groei en productie van Amerikaanse eik in Nederland
Jansen, J.J. ; Oosterbaan, A. ; Mohren, G.M.J. ; Ouden, J. den - \ 2018
Wageningen : Wageningen University & Research (FEM Groei en Productie rapport 2018-9) - 41
In the Netherlands growth and yield research on red oak was done from 1949 to 1988. This includes studies by Becking and by the Dorschkamp/IBN research institute. Together with the perma-nent sample plots from the timber prognosis system HOSP, all this comprises a dataset of 58 plots with 306 recordings. For the development of top height htop with age t, Jansen & Hildebrand’s poly-morphic model with site index h70 and three additional parameters fitted best.The diameter development up to stand height of 7 m was described with a linear function in htop and initial density (N0). From a stand height of 7 m and up, the basal area increment (iG) was described by Jansen’s et al. model based on a power function with htop, t, year of recording (yor), and the stand density index of Hart (S %). For S% > 19.1 the basal area increment drops strongly non-linear with in-creasing S%. The model contains a correction factor for yor, which was not significant. The effect of thinning on the diameter after thinning, was modelled with a modified La Bastide-Faber model. The model was used to construct yield tables for with five site classes and one thinning intensity
Groei en productie van populier in Nederland
Jansen, J.J. ; Mohren, G.M.J. ; Schmidt, P. ; Goudzwaard, L. ; Oosterbaan, A. ; Ouden, J. den - \ 2018
Wageningen : Wageningen University & Research (FEM Groei en Productie rapport 2018-8) - 127
Between 1947 and 2000, growth and yield of Poplar was studied in the Netherlands. To the permanent plots measured by Becking and De Dorschkamp/IBN, the permanent sample plots from HOSP were added, resulting in 235 plots and 1808 recordings.The development of the mean height hm with age t was found to be best described by a Chapman-Richards-model, with adjustment factors for dense stand and for different parameters for forest stands, line plantings, and for aspen, using site index h25. The diameter development up to a height of 7 m was best described with a Gompertz-model in t, hm and the initial spacing (SP0).The basal area increment IG was best explained by a power function in which hm, age, h25 and the Becking-Hart spacing index S% are included. For S% > 29.2 the basal area increment dropped with a non-linear function in S%. For dense spacing and for line plantings, other models fitted best.Combining all models, a stand projection model was constructed, which described the plot develop-ment as measured reasonably well.Yield tables were made for forests with different spacing, for forests with a wide stand with and with-out systematically thinning, for forest with very dense spacing including mortality, for line plantings without thinning, and for aspen with heavy thinning from below
Groei en productie van Oostenrijkse den in Nederland
Jansen, J.J. ; Oosterbaan, A. ; Mohren, G.M.J. ; Ouden, J. den - \ 2018
Wageningen : Wageningen University & Research (FEM Groei en Productie rapport 2018-7) - 96
In the Netherlands, growth and yield research on Austrian pine was done from 1925 to 1990. This include studies by the Dorschkamp/IBN research institute. Together with the permanent sample plots from the timber prognosis system HOSP, all this comprises a dataset of 117 plots with 486 recordings. For the development of top height htop over age (t), Jansen & Hildebrand’s model with asymptote and 3 additional parameters fitted best. As site index, top height at 50 year (h50) was chosen. The diameter development up to stand height of 7 m was best described with a power func-tion based on htop, the density after refinements (NR), and h50. From a stand height of 7 m and up, the basal area increment (iG) was best described by a power function based on htop, t, and the stand den-sity index of Hart (S%). For S % > 28.7 the basal area increment drops with increasing S %. The effect of thinning on diameter after thinning was modelled with a modified La Bastide-Faber model. With all models together, a stand projection model was constructed, which follows the measured stand development reasonably well. The model was used to construct yield tables with seven site classes and six thinning intensities.
Groei en productie van Corsicaanse den in Nederland
Jansen, J.J. ; Oosterbaan, A. ; Mohren, G.M.J. ; Ouden, J. den - \ 2018
Wageningen : Wageningen University & Research (FEM Groei en Productie rapport 2018-6) - 109
In the Netherlands, growth and yield research on Corsican pine was done from 1925 to 1990. 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 193 plots with 869 recordings. For the development of top height htop over age (t), Jansen & Hilde-brand’s model with asymptote and 3 additional parameters fitted best. As site index, top height at 50 year (h50) was chosen. The diameter development up to stand height of 7 m was best described with a Gompertz function based on htop, the density after refinements (NR), and h50. From a stand height of 7 m and up, the basal area increment (iG) was best described by a power function based on htop, t, and the stand density index of Hart (S %). For S % > 22.4 the basal area increment drops with increas-ing S %. The year of recording in relation with Brunchorstia dieback was also included in the model. The effect of thinning on diameter after thinning was modelled with a modified La Bastide-Faber model. With all models together, a stand projection model was constructed, which follows the meas-ured stand development reasonably well. The model was used to construct yield tables with seven site classes and six thinning intensities.
Groei en productie van beuk in Nederland
Jansen, J.J. ; Mohren, G.M.J. ; Oosterbaan, A. ; Goudzwaard, L. ; Ouden, J. den - \ 2018
Wageningen : Wageningen University & Research (FEM Groei en Productie rapport 2018-5) - 96
In the Netherlands growth and yield research on common beech was done from 1960 to 1992 at very small scale. This includes studies by Becking and by the Dorschkamp/IBN research insti-tute. Together with the permanent sample plots from the timber prognosis system HOSP, all this comprises a dataset of 47 plots with 169 recordings. For the development of top height (htop) with age (t) Cieszewski’s model with site index h70 and three additional parameters fitted best. The diame-ter development up to stand height of 7 m was 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 also described by a model from Jansen et al., based on a power function with htop, t, year of recording (yor), and the stand density of Hart (S %). For S % > 17.6 the basal area increment drops strongly with increasing S %. The model contains a correction factor for yor, which unfortunately could not be esti-mated from the plot data. 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 con-structed, which describes the measured stand development moderately well. The model was used to construct yield tables for with five site classes and six thinning intensities
Groei en productie van zomereik in Nederland
Jansen, J.J. ; Oosterbaan, A. ; Mohren, G.M.J. ; Ouden, J. den - \ 2018
Wageningen : Wageningen University & Research (FEM Groei en Productie rapport 2018-4) - 87
In the Netherlands growth and yield research on common oak was done from 1947 to 2004. 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 87 plots with 434 recordings. For the development of top height htop with age t Cieszewski’s model with site index h70 and three additional parameters fitted best. The diameter development up to stand height of 7 m was 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 also described by another model by Jansen et al. based on a power function with htop, age, year of recording (yor), and the stand density of Hart (S %). For S% > 21.8 the basal area increment drops strongly with increasing %. The model contains a correction factor for yor; for the period since 1981, this factor is 15 % above the level of the period 1934 until 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 reasonably well. The model was used to construct yield tables for with five site classes and five thinning intensities.
Groei en productie van grove den in Nederland
Jansen, J.J. ; Mohren, G.M.J. ; Oosterbaan, A. ; Goudzwaard, L. ; Ouden, J. den - \ 2018
Wageningen : Wageningen University & Research (FEM Groei en Productie rapport 2018 - 3) - 87
In the Netherlands, growth and yield research on Scots pine was done from 1949 to 2002. 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 94 plots with 348 recordings. For the development of top height htop with age (t), Cieszewski’s model with site index h70 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 the stand density index of Hart (S%). For S % > 20.6 the basal area increment drops strongly with increasing S %. The effect of thinning on diameter after thinning was modelled with a modified La Bastide-Faber model. With all models together, a stand projection model was constructed, which follows the measured stand development reasonably well. The model was used to construct yield tables with five site classes and four thinning intensities.
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