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Is the variability of key wood properties linked with the variability of key architectural traits? Case of planted Teak in Togo regarding thinning and provenance / Kodjo Tondjo in Annals of Forest Science [en ligne], vol 72 n° 6 (September 2015)  

Public [article]  inAnnals of Forest Science [en ligne] > vol 72 n° 6 (September 2015) . - pp 717 - 729 Titre : Is the variability of key wood properties linked with the variability of key architectural traits? Case of planted Teak in Togo regarding thinning and provenance Type de document : Article/Communication Auteurs : Kodjo Tondjo, Auteur ; Loïc Brancheriau, Auteur ; Sylvie-Annabel Sabatier, Auteur ; et al., Auteur Année de publication : 2015 Article en page(s) : pp 717 - 729 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation [Termes descripteurs IGN] analyse diachronique [Termes descripteurs IGN] Congo [Termes descripteurs IGN] croissance végétale [Termes descripteurs IGN] image proche infrarouge [Termes descripteurs IGN] Tectona grandis [Termes descripteurs IGN] Togo [Termes IFN] ontogenèse végétale [Termes IFN] propriété du bois Résumé : (auteur) Key message : A retrospective architectural analysis performed on planted teaks in Togo showed that the variation of wood radial properties were linked with tree ontogeny, and that these relationships depended on thinning practices and provenance. Context : Variability in growth, flowering and forking in individual trees according to origin and/or thinning practices may affect wood structure and consequently impact wood physical properties. We tested this hypothesis in teak. Aims : We sought evidence of: (1) origin effects (Togolese versus Tanzanian teak) on growth, flowering, cambial growth and wood properties; (2) thinning effects on these variables and (3) relationships between tree ontogeny and radial variations of wood properties. Methods : A retrospective architectural analysis was used to draw stem growth and near infrared spectroscopy to assess radial variations of wood properties. Results : Flowering reflects tree vigour and began at an earlier age in Togolese than in Tanzanian provenances. No differences were detected in regards to growth ring surface area, basic density and modulus of elasticity. Both systematic and selective thinnings improved growth without impacting the two latter properties. Stabilization of the growth ring area observed at 4 years old was associated with a decline in stem annual extension with a 1-year time lag. Conclusions : Architectural analyses showed that radial growth was linked with tree ontogeny. This method can be extended to subsequent developmental stages, i.e. to older trees with economic interest, and used to determine architectural traits that are useful in tree selection. Numéro de notice : A2015-408 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1007/s13595-014-0425-x date de publication en ligne : 24/10/2014 En ligne : https://doi.org/10.1007/s13595-014-0425-x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76895 [article]

Fall fertilization of Pinus resinosa seedlings: nutrient uptake, cold hardiness, and morphological development / M. Anisul Islam in Annals of Forest Science, Vol 66 n° 7 (October - November 2009)  

Public [article]  inAnnals of Forest Science > Vol 66 n° 7 (October - November 2009) . - n° 704 Titre : Fall fertilization of Pinus resinosa seedlings: nutrient uptake, cold hardiness, and morphological development Titre original : Fertilisation automnale des plants de Pinus resinosa : absorption des éléments nutritifs, rusticité au froid, et développement morphologique Type de document : Article/Communication Auteurs : M. Anisul Islam, Auteur ; Kent G. Apostol, Auteur ; Douglass F. Jacobs, Auteur ; R. Kasten Dumroese, Auteur Année de publication : 2009 Article en page(s) : n° 704 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes descripteurs IGN] azote [Termes descripteurs IGN] croissance végétale [Termes descripteurs IGN] Etats-Unis [Termes descripteurs IGN] Pinus resinosa [Termes descripteurs IGN] rusticité [Termes IFN] fertilisation (biologie) [Vedettes matières IGN] Sylviculture Résumé : (auteur) Fall fertilization may increase plant nutrient reserves, yet associated impacts on seedling cold hardiness are relatively unexplored. Bareroot red pine (Pinus resinosa Ait.) seedlings in north-central Minnesota, USA were fall fertilized at the end of the first growing season with ammonium nitrate (NH4 NO3) at 0, 11, 22, 44, or 89 kg N ha−1. Seedling morphology and cold hardiness [assessed by freeze induced electrolyte leakage (FIEL)] were evaluated six weeks after fertilization and following the second growing season. Seedling height and number of needle primordia increased with fertilizer rate for both sampling years. Seedlings fertilized with 44 and 89 kg N ha−1 attained target height (15 cm) after the second growing season. Shoot and root N concentration increased after the first growing season in fall fertilized seedlings compared to controls. Fall fertilized seedlings had lower FIEL (i.e., increased cold hardiness) compared to controls when tested at –40 °C after the first growing season, but no significant differences in FIEL of control and fertilized seedlings were observed after the second growing season. Results suggest that fall fertilization of red pine seedlings can help render desired target height in the nursery, while maintaining or increasing cold hardiness levels. Numéro de notice : A2009-625 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1051/forest/2009061 date de publication en ligne : 02/10/0229 En ligne : https://www.afs-journal.org/articles/forest/full_html/2009/07/f09071/f09071.html Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=72828 [article]

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
IFN-001-P000668	PER	Revue	Nogent-sur-Vernisson	Salle périodiques	Exclu du prêt

Site preparation and competing vegetation control affect loblolly pine long-term productivity in the southern Piedmont/Upper Coastal Plain of the United States / Dehai Zhao in Annals of Forest Science, Vol 66 n° 7 (October - November 2009)  

Public [article]  inAnnals of Forest Science > Vol 66 n° 7 (October - November 2009) . - n° 705 Titre : Site preparation and competing vegetation control affect loblolly pine long-term productivity in the southern Piedmont/Upper Coastal Plain of the United States Titre original : La préparation du terrain et le contrôle de la végétation adventice affectent la productivité à long terme de Pinus taeda dans les stations des Piémonts du sud et des plaines côtières des États-Unis d'Amérique Type de document : Article/Communication Auteurs : Dehai Zhao, Auteur ; Michael Kane, Auteur ; Bruce E. Borders, Auteur ; Mike Harrison, Auteur ; John W. Rheney, Auteur Année de publication : 2009 Article en page(s) : n° 705 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes descripteurs IGN] brûlis [Termes descripteurs IGN] croissance végétale [Termes descripteurs IGN] Etats-Unis [Termes descripteurs IGN] gestion forestière [Termes descripteurs IGN] pesticide [Termes descripteurs IGN] Pinus taeda [Termes descripteurs IGN] production végétale [Termes IFN] adventice [Termes IFN] fertilisation (biologie) [Vedettes matières IGN] Sylviculture Résumé : (Editeur) A site preparation study was established in 1986 to evaluate the effect of different site preparation treatments on growth and yield of loblolly pine (Pinus taeda L.) plantations on the Piedmont and Upper Coastal Plain regions of the southern United States. Site preparation treatments included: (1) burn only, (2) chop-burn, (3) shear-pile-disk, (4) chop-herbicide-burn, (5) herbicide-burn, and (6) herbicide-burn-herbicide. The data from the available 19 installations at age 21 were analyzed with separate analysis of variance and a multilevel nonlinear mixed-effects modeling approach. The herbicide-burn-herbicide treatment significantly increased average Dbh, height, basal area and volume per hectare compared to all other treatments. The burn only treatment consistently ranked worst and was followed by the chop-burn treatment. The shear-pile-disk and chop-herbicide-burn treatments had similar overall growth pattern, and will approach the same level of pine volume as the herbicide-burn treatment. Loblolly pine mean annual increment in volume (m3 ha−1 y−1 ) at age 21 by treatment were: herbicide-burn-herbicide (17.9), shear-pile-disk (16.1), herbicide-burn (15.9), chop-herbicide-burn (15.4), chop-burn (14.3), and burn (11.2). An additional chop or herbicide treatment to the burn treatment significantly increased loblolly pine yield. Complete control of both herbaceous and woody completion enhanced long-term pine productivity. Numéro de notice : A2009-626 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1051/forest/2009055 date de publication en ligne : 02/10/2009 En ligne : https://www.afs-journal.org/articles/forest/full_html/2009/07/f08385/f08385.html Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=72829 [article]

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
IFN-001-P000668	PER	Revue	Nogent-sur-Vernisson	Salle périodiques	Exclu du prêt