Objectives: The objective of this study was to explore the relationship between calcium nutrition and stress response physiology in sugar maple trees growing in a long-term, replicated calcium manipulation study.
Principal Investigator: Brett Huggett, Paul Schaberg, Gary Hawley and Christopher Eager
Laboratory: Schaberg Lab
Recommended Citation: Huggett, BA, Schaberg, PG, Hawley, GJ and Eager, C. 2007. Impacts of long-term calcium and aluminum treatments on sugar maple growth, wound closure and overall health. https://doi.org/10.1139/X07-042
Project Contents: Data for 12 Plots, 60 Trees, 120 Cores
Project Period: 2003-01-01 to 2005-12-31
Species:
Acer saccharum
Data License: 
What's this?Description: In 2004, we measured tree ring growth, branch dieback, crown vigor, foliar nutrition, wound closure and the production of lignin and callose in mostly dominant and codominant sugar maple trees growing on twelve pre-existing plots at the Hubbard Brook Experiment Forest in Thornton, New Hampshire. In total, 60 trees were evaluated. The plots, established in 1995, were equally and randomly divided among three treatments: soil calcium addition, soil aluminum addition and control (no treatment).
Related Publications:
- Huggett BA, Schaberg PG, Hawley GJ, Eager, C. 2007. Long-term calcium addition increases growth release, wound closure, and health of sugar maple (Acer saccharum) trees at the Hubbard Brook Experiment View
Project Metadata
Taxonomic standard used: Other
How plots were selected: Plots were previously established and represented control (4 plots), calcium addition (4 plots) and aluminum addition (4 plots).
How trees were selected: Five dominant or co-dominant sugar maple trees were selected on each plot.
Exclusion of trees (if any): Trees with bole or crown damage were excluded.
How cores were collected: Two 5 mm increment cores were extracted from each tree at breast height, 180° from each other, and perpendicular to the slope.
How cores were processed: Increment cores were dried, mounted and sanded using standard methods. Tree rings were visually crossdated using the list method, microscopically measured using a Velmex sliding stage unit and MeasureJ2X software (0.001 mm resolution) followed by the use of COFECHA to detect and correct crossdating errors.
Exclusion of cores (if any): A small number of cores were discarded since they were poorly correlated with the master chronology (i.e., below Pearson critical correlation 99% confidence levels) due to unusual growth trends that were not representative of overall growth at the site.
Added to the database: 03/03/2022
Last modified: 03/07/2022