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Impacts of long-term calcium and aluminum treatments on sugar maple growth, wound closure and overall health

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.

Project Contents: Data for 12 Plots, 60 Trees, 120 Cores

Project Period: 2003-01-01 to 2005-12-31


Acer saccharum

Data License: cc-zero license logo

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:

  1. 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

Sample of Plot Data

Up to 10 rows of data are shown below.

Plot ID Latitude Longitude Site Description Crew
143.954110-71.747790Not ProvidedBrett Huggett
243.954110-71.747790Not ProvidedBrett Huggett
343.954110-71.747790Not ProvidedBrett Huggett
443.954110-71.747790Not ProvidedBrett Huggett
543.954110-71.747790Not ProvidedBrett Huggett
643.954110-71.747790Not ProvidedBrett Huggett
743.954110-71.747790Not ProvidedBrett Huggett
843.954110-71.747790Not ProvidedBrett Huggett
943.954110-71.747790Not ProvidedBrett Huggett
1043.954110-71.747790Not ProvidedBrett Huggett
1143.954110-71.747790Not ProvidedBrett Huggett

Sample of Tree Data

Up to 10 rows of data are shown below.

Plot ID Tree ID Species Status Diameter Diameter Units Crown Position Vigor Dieback
210ACSA14.1centimeterIntermediateLight decline5

Sample of Raw Core Data

Up to 10 rows of data are shown below.

Plot ID Tree ID DBH Vigor Sample ID Species First Year Last Year Estimated Age 2004200320022001200019991998199719961995

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Plot Data

Tree Data

Increment Core Data

Supporting Statistical/Analytical Files

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Site Description:

Tree ID:




Crown Position:




Series Intercorrelation:

Average Mean Sensitivity:

Standard Deviation:


Number of dated series:

Segment Length Tested:

Number of Problem Segments:

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