Open AccessJournal Article
Productivity of Populus in monoclonal and polyclonal blocks at three spacings. [Erratum: Oct 1997, v. 27 (10), p. 1702.]
D.S. DeBell,C.A. Harrington +1 more
TLDR
In this article, the authors compare the performance of parcelles polyclonales and monoclonales compared to parcelle monoclanales and polyclons.Abstract:
Quatre clones de Populus furent cultives dans un dispositif comportant trois espacements (0,5, 1,0 et 1,5 m) et des parcelles monoclonales et polyclonales ou tous les clones etaient completement melanges. Apres trois ans, plusieurs traits des arbres pris individuellement ou des peuplements differaient selon le clone, l'espacement, la methode de deploiement et les interactions entre ces facteurs. Les differences dans la croissance et la forme de la tige entre les clones etaient plus importantes dans les parcelles polyclonales que monoclonales. Du point de vue de la performance, les differences entre les methodes de deploiement etaient plus fortes dans les plantations les plus denses. Les peuplements monoclonaux etaient plus uniformes quant a la dimension des arbres que les peuplements polyclonaux. Le rendement total epige de matiere ligneuse seche atteignait en moyenne 48,0 Mg.ha -1 avec l'espacement de 0,5 m et diminuait avec l'augmentation de l'espacement. Le rendement de certains clones differait de celui d'autres clones dans les parcelles monoclonales et polyclonales. En assumant qu'on a plante le meme nombre de plants pour les clones correspondants, le mode de deploiement n'a pas affecte la productivite; c'est-a-dire que, meme s'il y avait des differences de rendement entre les clones, le rendement moyen des quatres clones en parcelles monoclonales (44,3 Mg.ha -1 ) ne differait pas du rendement des parcelles polyclonales (43,1 Mg.ha -1 ). Les rendements comparatifs (rendement dans les parcelles polyclonales/rendement dans les parcelles monoclonales) differaient par contre beaucoup et les augmentations ou les diminutions de rendement comparatif differaient selon l'espacement et le clone. La production et les stocks etaient moins egalement repartis entre les clones dans le cas des deploiements polyclonaux que monoclonaux.read more
Citations
More filters
BookDOI
Mechanisms and deployment of resistance in trees to insects.
TL;DR: The resistance of hybrid willows to specialist and generalist herbivores and pathogens: the potential role of secondary chemistry and parent host plant status J.D. Paine is studied.
Journal ArticleDOI
Free-air CO2 enrichment (FACE) enhances biomass production in a short-rotation poplar plantation.
Carlo Calfapietra,Birgit Gielen,A.N.J. Galema,Martin Lukac,P. De Angelis,M.C. Moscatelli,Reinhart Ceulemans,Giuseppe Scarascia-Mugnozza +7 more
TL;DR: There was greater depletion of inorganic nitrogen from the soil after three growing seasons in elevated [CO2], but no effect of [ CO2] on stem wood density, which differed significantly only among species.
Journal ArticleDOI
Biomass equations and carbon content of aboveground leafless biomass of hybrid poplar in Coastal British Columbia
L.M. Zabek,Cindy E. Prescott +1 more
TL;DR: In this article, individual-tree bole and branch biomass equations were derived for Populus trichocarpa Torr. hybrids from plantations in coastal British Columbia, Canada.
Journal Article
Wood density and fiber length in young populus stems: relation to clone, age, growth rate, and pruning
TL;DR: In this paper, the authors measured ring width, wood density, and fiber length of Populus clones from 9-year-old trees of three Populus clone grown in an intensively-cultured plantation in western Washington.
Journal ArticleDOI
Increment and biomass in hybrid poplar and some practical implications
Tord Johansson,Almir Karacic +1 more
TL;DR: In this article, growth data from 41 stands of poplar (Populus sp.) growing on former farmland in Sweden, situated between latitudes 55 and 63° N. The mean age of the poplar was 20 years (range 4-73), the mean stand density 1327 stems ha−1 (range 155-4690), and the mean diameter at breast height (over bark) 210mm (range 49-447mm).
References
More filters
Journal ArticleDOI
Genetic variation and productivity of Populustrichocarpa and its hybrids. II. Biomass production in a 4-year plantation
Paul E. Heilman,R. F. Stettler +1 more
TL;DR: Three new Populustrichocarpa × P. deltoides hybrids planted in the trial were generally more productive than black cott...
BookDOI
Mechanisms and deployment of resistance in trees to insects.
TL;DR: The resistance of hybrid willows to specialist and generalist herbivores and pathogens: the potential role of secondary chemistry and parent host plant status J.D. Paine is studied.
Journal ArticleDOI
Free-air CO2 enrichment (FACE) enhances biomass production in a short-rotation poplar plantation.
Carlo Calfapietra,Birgit Gielen,A.N.J. Galema,Martin Lukac,P. De Angelis,M.C. Moscatelli,Reinhart Ceulemans,Giuseppe Scarascia-Mugnozza +7 more
TL;DR: There was greater depletion of inorganic nitrogen from the soil after three growing seasons in elevated [CO2], but no effect of [ CO2] on stem wood density, which differed significantly only among species.
Assessing the need for transformation of response variables
TL;DR: File scanned at 300 ppi (256 Grayscale) using Capture Perfect 3.0 on a Canon DR-9050C in PDF format and CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.