Site indexes for lodgepole pine, with corrections for stand density : methodology /

Alexander, R. R.; Tackle, David; Dahms, Walter G.

doi:10.5962/bhl.title.98817

Cited by 17 publications

(5 citation statements)

References 4 publications

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“…natural regeneration following wildfire is often very dense and studies show that densely stocked young trees are slow to express dominance. As a result, separate site index curves have been developed for these species based on stocking density (Lynch 1958, Alexander et al 1967. Another example is for loblolly pine (P. taeda L.) planted at very close spacing (MacFarlane et al 2000).…”

Section: Site Indexmentioning

confidence: 99%

Growth and yield comparisons for red pine, white spruce and black spruce plantations in northwestern Ontario

Homagain

ShahiChander

CarmeanWillard

et al. 2011

The Forestry Chronicle

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Intensive forest management for wood production requires that we identify our most productive forest lands as well as the most productive and most commercially valuable tree species that should be managed on these lands. The Thunder Bay Spacing Trial established in 1950 provides growth and yield comparisons on a productive site for red pine, white spruce, and black spruce. Our analysis based on six remeasurements from 1983 to 2007 show that red pine has produced more than twice the volume of white spruce and about three times the volume of black spruce. The greater volume for red pine in comparison to the spruces is attributed to taller trees, larger average diameters and more basal area.

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Section: Site Indexmentioning

confidence: 99%

Growth and yield comparisons for red pine, white spruce and black spruce plantations in northwestern Ontario

Homagain

ShahiChander

CarmeanWillard

et al. 2011

The Forestry Chronicle

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“…In the case of a more realistic range of densities at which forest management typically operates (2000-10,000 stems/ha), the height repression effect is substantially reduced: 7% and 10% for jack pine and black spruce, respectively. Analytical solutions for accounting for repression effects when developing site index equations and their height-age analogues could include the calibration of separate functions for different management intensities (e.g., different functions for natural-orgin stands and plantations), employing empirical-based corrective adjustments within the model specifications (e.g., [27]), or developing entirely new models in which stand density is explicitly included as a dynamic-based independent variable (sensu [14]). …”

Section: Discussionmentioning

confidence: 99%

Occurrence of Density-Dependent Height Repression within Jack Pine and Black Spruce Populations

Newton

2015

Forests

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Abstract:The objective of this study was to investigate the occurrence of density-dependent height relationships in jack pine (Pinus banksiana Lamb.) and black spruce (Picea mariana (Mill.) B.S.P.) populations. After assessing and ruling out the presence of consequential spatial correlation effects, the analysis consisted of analyzing the relationship between mean dominant height and initial planting density within 28 Nelder plots located in the central portion of the Canadian Boreal Forest Region. Employing remeasurement data obtained at periodic intervals (16, 20 and 40-41 years post-establishment) across a stand density gradient ranging from a minimum of 1425 stems/ha to a maximum of 28,621 stems/ha, graphical and simple linear regression analyses were used to quantify the stand height-density relationship by species, plot and measurement year. The results indicated the presence of density-dependent effects on height development for both species: 65% of the 83 jack pine relationships and 89% of the 27 black spruce relationships had significant (p ≤ 0.05) and negative slope values. In regards to jack pine for which the data permitted, the occurrence and magnitude of the observed height repression effect increased over time. The asymptotic height repression effect for jack pine was 24% greater than that for black spruce. The results are discussed within the context of the applicability of the density-independent height growth assumption and potential implications for site quality estimation and thinning response modeling.

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“…La courbe C représente la densité des peuplements qui peuvent atteindre le niveau B en 10 ans, sur des stations de productivité moyenne (d'après Gingrich, 1967 Dahms (1967).…”

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Aspects de la notion de densité et croissance des arbres en peuplement

Ottorini¹

1978

Ann. Sci. forest.

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RésuméDe nombreux travaux de recherche publiés depuis le début des années soixante par des forestiers américains aux U.S.A. et au Canada ont été motivés par l'idée qu'une expression convenable de la densité d'un peuplement pourrait servir de façon non négligeable les études de production et de croissance.La mesure la plus souvent utilisée, le CCF, a pu avoir plusieurs applications dans divers domaines tels que les normes de peuplements, la détermination de la productivité réelle d'une station pour une essence, ou la protection d'une espèce de sapin attaquée par un scolyte en peuplement mélangé.En relation étroite avec les mesures de densité de peuplement, les indices de concurrence doivent être considérés comme des mesures locales de densité ; ils ont depuis longtemps été étudiés aux U.S.A., mais ont trouvé récemment leur meilleure expression, et démontré leur efficacité dans l'élaboration de modèles de croissance où l'arbre est l'unité de croissance.Chaque fois, pour les mesures de densité de peuplement ou les indices de concurrence, il s'est avéré que des informations circonstanciées sur la croissance et le développement des arbres apportent beaucoup aux études de croissance et de production des peuplements.Les travaux présentés dans cet article ne sont jamais purement théoriques, et sont tous basés sur des données expérimentales. Les raisonnements sont généralement plutôt déductifs qu'inductifs.

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Site indexes for lodgepole pine, with corrections for stand density : methodology /

Cited by 17 publications

References 4 publications

Growth and yield comparisons for red pine, white spruce and black spruce plantations in northwestern Ontario

Growth and yield comparisons for red pine, white spruce and black spruce plantations in northwestern Ontario

Occurrence of Density-Dependent Height Repression within Jack Pine and Black Spruce Populations

Aspects de la notion de densité et croissance des arbres en peuplement

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