Détail de l'auteur
Auteur Jorge Martín-García
Commentaire :
Department of Plant Production and Forest Resources, University of Valladolid, Avenida de Madrid 44, 34004 Palencia, Spain.
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Towards standardised crown condition assessment in poplar plantations / Jorge Martín-García in Annals of Forest Science, Vol 66 n° 3 (April - May 2009)
[article]
Titre : Towards standardised crown condition assessment in poplar plantations Titre original : Améliorations en vue d'un suivi standardisé de l'état sanitaire des houppiers en plantations monoclonales de peuplier Type de document : Article/Communication Auteurs : Jorge Martín-García, Auteur ; Julio Javier Diez, Auteur ; Hervé Jactel, Auteur Année de publication : 2009 Article en page(s) : n° 308 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation
[Termes IGN] houppier
[Termes IGN] indicateur biologique
[Termes IGN] Populus (genre)
[Termes IGN] santé des forêtsRésumé : (auteur) This work aims at developing new tools for rapid assessment of forest health indicators in poplar plantations. Crown transparency and discoloration were visually evaluated in all trees of four 15 m-radius sub-plots in 32 poplar clonal plantations, which were chosen according to a factorial scheme with three factors: tree age, site quality and understorey vegetation management. A subset of trees was assessed using digital photos processed with a semi-automatic image analysis system (the CROCO software) in order to compare visual and digital crown transparency estimates. Poplar crown conditions were better in young stands and rich sites. Harrowing understorey vegetation improved tree health in poor sites. Samples of 20 trees per stand provided the same information about crown transparency and discoloration as 60 trees. Calibration curves of digital crown transparency estimates were successfully fitted against visual crown transparency estimates. The same effects of stand age and site quality could be detected with digital crown transparency as response variable. The use of digital photos processed with CROCO in ca. twenty trees per stand is therefore recommended to accurately and objectively monitor crown condition in clonal poplar plantations. Numéro de notice : A2009-711 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1051/forest/2009006 Date de publication en ligne : 10/03/2009 En ligne : https://www.afs-journal.org/articles/forest/full_html/2009/03/f08144/f08144.html Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=72063
in Annals of Forest Science > Vol 66 n° 3 (April - May 2009) . - n° 308[article]