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Importance of Foliar Nitrogen Concentration to Predict Forest Productivity in the Mid-Atlantic Region

Author(s):

Jennifer Jenkins

Year:

2004

Publication type:

Scientific Journal (JRNL)

Primary Station(s):

Northern Research Station

Historical Station(s):

Northeastern Research Station

Source:

Forest Science. 50(3): 279-289.

Description

To assess what difference it might make to include spatially defined estimates of foliar nitrogen in the regional application of a forest ecosystem model (PnET-II), we composed model predictions of wood production from extensive ground-based forest inventory analysis data across the Mid-Atlantic region. Spatial variation in foliar N concentration was assigned based on a correlation with mean July temperature for deciduous forests and with latitude for coniferous forests. Although the slight variation observed in foliar N in conifers had little effect on predicted wood production, large differences in N concentration in deciduous trees increased agreement with field surveys by 12-59% in individual states and by 17% across the region. The validation revealed the need to develop regional foliar N concentration equations that represent the spatial variations of N concentration in deciduous forests to improve PnET-II's predictions.

Citation

Pan, Yude; Hom, John; Jenkins, Jennifer; Birdsey, Richard. 2004. Importance of Foliar Nitrogen Concentration to Predict Forest Productivity in the Mid-Atlantic Region. Forest Science. 50(3): 279-289.

Publication Notes

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  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
https://www.fs.usda.gov/treesearch/pubs/7942