Canadian Forest Service Publications

Équations pour estimer la teneur en substances nutritives de la portion épigée de six espèces feuillues de l’est du Canada. 1986. Chatarpaul, L.; Burgess, D.M.; Methven, I.R. Service canadien des forêts, Institut forestier national de Petawawa, Chalk River (Ontario). Rapport d’information PI-X-55F. 20 p.

Year: 1986

Available from: National Capital Region

Catalog ID: 19896

Language: French

Series: Information Report (Petawawa)

CFS Availability: PDF (download)

Abstract

Nutrient concentrations and biomass of various components of six eastern Canadian hardwood species, representing a range of diameter and height classes, were determined and used to estimate nutrient masses for each species and for components. One hundred and fifty (6 species x 5 components x 5 nutrients) linear regression equations were developed using nutrient mass, diameter, and height date.

Nutrient concentrations varied widely among components, with twigs/leaves, for example, containing 14 times as much nitrogen (1.246% to 0.087%) and 17 times as much phosphorous (0.137% to 0.008%) as the steam wood. Generally, twigs/leaves accounted for the highest percentage of nitrogen and phosphorous, stem wood had had the most potassium and magnesium, and stem bark contributed the greatest amount of calcium.

The single equations, with few exceptions, had high r2 and low SEE%, showing good fit of data to the simple linear model. The equations for all components (except twigs/leaves) of trembling aspen, sugar maple, red maple, and ironwood were not significantly different (P< .05) and could therefore be combined into a single equation. However, those of red oak and white birch were significantly different. The application of the four-species combined equations to stand data showed nutrient removals by full-tree harvesting could increase by 56% to 111% with the percentage increase in the order P = N > Mg > K = Ca.

Also available under the title:
Equations for estimating above-ground nutrient content of six eastern Canadian hardwoods (English)

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