Growth and yield of mixed versus pure stands of Scots pine (Pinus sylvestris L.) and European beech (Fagus sylvatica L.) analysed along a productivity gradient through Europe - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue European Journal of Forest Research Année : 2015

Growth and yield of mixed versus pure stands of Scots pine (Pinus sylvestris L.) and European beech (Fagus sylvatica L.) analysed along a productivity gradient through Europe

1 TUM - Technische Universität Munchen - Technical University Munich - Université Technique de Munich
2 INIA - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria = National Institute for Agricultural and Food Research and Technology
3 Georg-August-University = Georg-August-Universität Göttingen
4 Faculty of forestry
5 LERFoB - Laboratoire d'Etudes des Ressources Forêt-Bois
6 SGGW - Warsaw University of Life Sciences
7 Aleksandras Stulginskis University
8 CTFC - Centre de Ciència i Tecnologia Forestal de Catalunya
9 BOKU - Universität für Bodenkultur Wien = University of Natural Resources and Life [Vienne, Autriche]
10 SLU - Swedish University of Agricultural Sciences = Sveriges lantbruksuniversitet
11 TUZVO - Technical University in Zvolen
12 University of Freiburg [Freiburg]
13 MENDELU - Mendel University in Brno
14 NASU / НАН України - National Academy of Sciences of Ukraine = Національна академія наук України = Académie nationale des sciences d'Ukraine
15 UNIMOL - Università degli Studi del Molise = University of Molise
16 University of Novi Sad
17 WUR - Wageningen University and Research [Wageningen]
18 UNITO - Università degli studi di Torino = University of Turin
19 University of Agriculture
20 UCL - Université Catholique de Louvain = Catholic University of Louvain
21 Forestry and Game Management Research
22 Czech University of Life Science
23 UGENT - Universiteit Gent = Ghent University
24 Forest Research Institute
A. Avdagic
  • Fonction : Auteur

Résumé

Mixing of complementary tree species may increase stand productivity, mitigate the effects of drought and other risks, and pave the way to forest production systems which may be more resource-use efficient and stable in the face of climate change. However, systematic empirical studies on mixing effects are still missing for many commercially important and widespread species combinations. Here we studied the growth of Scots pine (Pinus sylvestris L.) and European beech (Fagus sylvatica L.) in mixed versus pure stands on 32 triplets located along a productivity gradient through Europe, reaching from Sweden to Bulgaria and from Spain to the Ukraine. Stand inventory and taking increment cores on the mainly 60-80 year-old trees and 0.02-1.55 ha sized, fully stocked plots provided insight how species mixing modifies the structure, dynamics and productivity compared with neighbouring pure stands. In mixture standing volume (+12 %), stand density (+20 %), basal area growth (+12 %), and stand volume growth (+8 %) were higher than the weighted mean of the neighbouring pure stands. Scots pine and European beech contributed rather equally to the overyielding and overdensity. In mixed stands mean diameter (+20 %) and height (+6 %) of Scots pine was ahead, while both diameter and height growth of European beech were behind (-8 %). The overyielding and overdensity were independent of the site index, the stand growth and yield, and climatic variables despite the wide variation in precipitation (520-1175 mm year(-1)), mean annual temperature (6-10.5 A degrees C), and the drought index by de Martonne (28-61 mm A degrees C-1) on the sites. Therefore, this species combination is potentially useful for increasing productivity across a wide range of site and climatic conditions. Given the significant overyielding of stand basal area growth but the absence of any relationship with site index and climatic variables, we hypothesize that the overyielding and overdensity results from several different types of interactions (light-, water-, and nutrient-related) that are all important in different circumstances. We discuss the relevance of the results for ecological theory and for the ongoing silvicultural transition from pure to mixed stands and their adaptation to climate change.

Dates et versions

hal-01269417 , version 1 (05-02-2016)

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Citer

H. Pretzsch, M. del Río, Ch. Ammer, A. Avdagic, Ignacio Barbeito Sanchez, et al.. Growth and yield of mixed versus pure stands of Scots pine (Pinus sylvestris L.) and European beech (Fagus sylvatica L.) analysed along a productivity gradient through Europe. European Journal of Forest Research, 2015, 134 (5), pp.927-947. ⟨10.1007/s10342-015-0900-4⟩. ⟨hal-01269417⟩
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