Forest Investment Account

Abstract of FII Project R2003-245

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Sulphur Fertilization of Lodgepole Pine: A Stable Isotope Tracer Study

Author(s): Sanborn, Paul (University of Northern British Columbia)
Subject: Chemistry/biochemistry, Forestry
Series: Forest Investment Account (FIA) - Forest Science Program


Sulphur (S) deficiencies in lodgepole pine are widespread in the B.C. central interior, but there is a limited basis for prescribing fertilization treatments that will have both immediate and sustained growth responses. This proposal builds on the Ministry of Forests' fertilization research program, and careful pilot studies, to combine area-based fertilization response methodology, with stable isotope tracing of the uptake and fate of various fertilizers. Both elemental S and more immediately plant-available sulphate-S forms will be compared, at operationally realistic addition rates and in combination with nitrogen fertilization. Using two sites that represent typical site and climate conditions in the Sub-Boreal Spruce zone, we will determine relative uptake of these forms, and be able to compare their mobilities and tranformations. This will give silviculturists a credible scientific foundation for making better fertilization decisions, and demonstrate serious intent to examine the effects of forest practices.

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Updated September 08, 2005 

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