Skip to Main Content
Effects of chronic low-level N additions on foliar elemental concentrations, morphology, and gas exchange of mature montane red spruceAuthor(s): Paul G. Schaberg; Timothy D. Perkins; Steven G. McNulty
Source: Canadian Journal of Forest Research. 27: 1622-1629.
Publication Series: Scientific Journal (JRNL)
Station: Northern Research Station
PDF: View PDF (112.61 KB)
DescriptionWe evaluated the influence of protracted low-level nitrogen (N) fertilization on 29 morphological, physiological, or chemical parameters measured on mature red spruce (Picea rubens Sarg.) growing within 10 study plots on Mount Ascutney, Vermont. For 8 consecutive years prior to this study, each plot received one of five treatments: 0, 15.7, 19.8, 25.6, or 31.4 kg N?ha-1?year-1. In comparison to plant material from control plots, trees that received N fertilization had fewer but longer and heavier needles, and higher rates of shoot water loss than trees from control plots. N fertilization resulted in increased foliar N concentrations, and reductions in foliar Ca and Mg concentrations to potentially deficient levels. Although no differences in chlorophyll content, chlorophyll fluorescence, or net photosynthesis were evident, N fertilization was associated with increased levels of respiration. Respiration rates were not correlated with foliar N concentrations, suggesting that the influence of N treatment on respiration was indirect. In contrast, respiration levels were negatively correlated with foliar Ca and Mg concentrations. Although we have no direct evidence that they are related, the N-induced alterations in foliar cation and respiration levels that we found may help account for N-induced reductions in tree growth and increases in mortality previously reported for this site.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, firstname.lastname@example.org if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationSchaberg, Paul G.; Perkins, Timothy D.; McNulty, Steven G. 1997. Effects of chronic low-level N additions on foliar elemental concentrations, morphology, and gas exchange of mature montane red spruce. Canadian Journal of Forest Research. 27: 1622-1629.
- Foliar nutrient status of young red spruce and balsam fir in a fertilized stand
- Calcium addition at the Hubbard Brook Experimental Forest increases the capacity for stress tolerance and carbon capture in red spruce (Picea rubens) trees during the cold season
- Acid mist and soil Ca and Al alter the mineral nutrition and physiology of red spruce
XML: View XML