Réaction individuelle de hêtres (Fagus silvatica L.) d'âges divers à diverses intensités d'éclaircie

Bouchon, J.; Dhôte, Jacob; Lanier, L.

doi:10.1051/forest:19890304

Cited by 7 publications

(13 citation statements)

References 3 publications

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“…In Switzerland, Kurt (1982) presented 80-120 target trees for beech with desired parameters in relation to DBH as given by yield tables. Based on the study in 20 stands in Switzerland, Leibundgut (1982) recommended 210 crop trees for beech at a top height of 35 m. A lower number of crop trees is typical and common in France, ranging from 80 to 100 trees·ha -1 (Bouchon et al 1989). A similar opinion was published by Klädtke (2002), who pointed out that the selection of more than 100 crop trees is not recommended, because the probability of red heart formation increases strongly due to a much longer production time.…”

Section: Discussionmentioning

confidence: 99%

“…It is a consequence of delayed tending, which started at the stand age of 60 years. In general, the best age for determination of crop trees is in the period of 30 to 40 years (Štefančík 1974, 1984Bouchon et al 1989;Spellmann, Nagel 1996;Guericke 2002). Results from Cigánka PRP showed that it is possible to achieve the expected quantitative production in the case of delayed, but systematic tending only.…”

Section: Discussionmentioning

confidence: 99%

“…It should be concluded that an optimal stand age seems possible for the selection of target trees, even before the age of 40 years of the stand (Bouchon et al 1989;Spellmann, Nagel 1996;Guericke 2002). On the other hand, Lüpke (1986) recommended that the first thinning in pure beech stands should be done at the age of 45 to 55 years.…”

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confidence: 99%

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Development of target (crop) trees in beech (Fagus sylvatica L.) stand with delayed initial tending and managed by different thinning methods

Štefančík¹

2013

J. For. Sci.

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ABSTRACT:We evaluated the research on silviculture-production in the last 45 years in a 105-year-old beech stand, not tended up to its stand age of 60 years. Four alternatives (tending regime) were studied for development of the target (crop) trees. These were: (i) plot with heavy thinning from below (C degree according to the German Forest Research Institutes from 1902), (ii) plot with free crown thinning (thinning interval of 5 years), (iii) plot with free crown thinning (thinning interval of 10 years), and (iv) control plot (with no thinning). Target trees in the stand were selected and marked at the beginning of the study. Their development was analysed in relation to the method of tending. Based on the 45-year research period, we conclude that the most favourable results were obtained on plots tended by free crown thinning (thinning interval of 5 or 10 years) in comparison with plots tended by heavy thinning from below or with the control plot (without any tending).

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Development of target (crop) trees in beech (Fagus sylvatica L.) stand with delayed initial tending and managed by different thinning methods

Štefančík¹

2013

J. For. Sci.

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“…Thinning can also lengthen the growing season (Bouchon et al, 1989) allowing the trees more time for growing.…”

Section: Discussionmentioning

confidence: 99%

“…Growth responses to thinning have been modeled to provide increased knowledge to be applied in forestry (Hibbs and Bentley, 1984;Piennar and Shiver, 1984;Whyte and Wollons, 1990). Thinning effects on tree growth are usually studied in terms of stem diameter increment, height growth, and canopy expansion of the remaining trees (Hamilton, 1981; Ducrey, 1988;Baldwin et al, 1989;Bouchon et al, 1989;Cutter et al, 1991), but effects on production of stump resprouts (Ducrey and Boisserie, 1992;Retana et al, 1992) and epicormic sprouts (Paysen et al, 1991) have been studied as well. Growth responses to thinning are relatively well known in many coniferous (Hamilton, 1981;Baldwin et al, 1989;Whyte and Woollons, 1990) and deciduous broad-leaved species (Bouchon et al, 1989;Cutter et al, 1991).…”

Section: Introductionmentioning

confidence: 99%

Growth response of holm oak (Quercus ilex L) to commercial thinning in the Montseny mountains (NE Spain)

Mayor

Roda

1993

Ann. For. Sci.

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Summary — Growth responses of holm oak (Quercus ilex) to commercial thinning were studied in the Montseny Biosphere Reserve (northeast Spain), where selection thinning for firewood production is currently the dominant form of management in holm oak forests. Thinning significantly increased mean stem diameter increment by 83% over that of unthinned plots during the 6-9-yr period after thinning, and by 48% from 9-12 yr after thinning. Absolute diameter increment was positively correlated with initial diameter at 1.30 m from the ground (dbh) both in thinned and unthinned plots. Thinning increased growth in large trees more than in smaller trees. Relative diameter growth was negatively correlated with initial dbh. It is concluded that individual holm oak stems in previously coppiced stands respond vigourously to thinning, and still do so 6-9 yr after thinning. The growth response diminishes 9-12 yr after thinning due to canopy closure. However, absolute rates of stand growth, as well as basal area and stem biomass increments, were unaffected by thinning during these time intervals, an example of density compensation.canopy closure I Quercus ilex = holm oak I selection thinning I stand growth / tree growth Résumé — Effet d'une éclaircie commerciale sur la croissance d'un chêne vert (Quercus ilex L) dans les montagnes du Montseny (NE de l'Espagne). L'effet d'une éclaircie commerciale sur la croissance du chêne vert (Quercus ilex) a été étudié dans la réserve de la Biosphère du Montseny (NE Espagne). Dans cette région, l'éclaircie sélective pour la production du bois de chauffage est la forme la plus commune de gestion des forêts. L'éclaircie a augmenté l'accroissement de diamètre des tiges de 83% par rapport aux placettes non éclaircies entre 6 et 9 ans et de 48% entre 9 et 12 ans après le traitement. L'accroissement absolu de diamètre est corrélé positivement avec le diamètre initial à 1,30 m. Les gros arbres ont davantage augmenté leur croissance que les petits. L'accroissement relatif en diamètre est corrélé négativement avec le diamètre initial à 1,30 m. On peut conclure que les tiges du chêne vert dans le taillis étudié ont une réponse vigoureuse à l'éclaircie et que cette réponse se prolonge encore 6 à 9 ans après. L'effet sur la croissance diminue 9 à 12 ans après l'éclaircie par suite de la fermeture du couvert végétal. Cependant, les taux absolus d'accroissement du peuplement, ainsi que la croissance de la surface terrière et de la biomasse des tiges, ne sont pas affectés par l'éclaircie pendant ces intervalles de temps, ce qui constitue un exemple de compensation de la densité. fermeture de la couverture végétale / Quercus ilex = chêne vert / éclaircie sélective / accroissement du peuplement / croissance des tiges INTRODUCTION

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Modélisation de la croissance des peuplements réguliers de hêtre : dynamique des hiérarchies sociales et facteurs de production

Dhôte¹

1991

Ann. For. Sci.

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Résumé — Afin de permettre la simulation de la croissance de peuplements réguliers de hêtre soumis à divers traitements sylvicoles, un modèle indépendant des distances a été mis au point, à partir des données recueillies dans des essais comparatifs d'éclaircie observés sur de longues périodes. On a choisi de modéliser simultanément et de façon cohérente l'effet de la densité et des facteurs sociaux sur la croissance, aux deux niveaux de l'arbre et du peuplement. Le

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Réaction individuelle de hêtres (Fagus silvatica L.) d'âges divers à diverses intensités d'éclaircie

Cited by 7 publications

References 3 publications

Development of target (crop) trees in beech (Fagus sylvatica L.) stand with delayed initial tending and managed by different thinning methods

Development of target (crop) trees in beech (Fagus sylvatica L.) stand with delayed initial tending and managed by different thinning methods

Growth response of holm oak (Quercus ilex L) to commercial thinning in the Montseny mountains (NE Spain)

Modélisation de la croissance des peuplements réguliers de hêtre : dynamique des hiérarchies sociales et facteurs de production

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