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Sulphur (S) deficiencies are widespread in lodgepole pine stands in the British Columbia central interior. Low soil S availability can limit tree growth responses to nitrogen (N) fertilization. Refined diagnostic criteria and decision-making tools enable more reliable identification of stands that will respond to inclusion of S in fertilizer prescriptions. Most research and large-scale aerial fertilizer operations have used soluble sulphate-S sources, but evidence is accumulating that elemental-S provides equally satisfactory long-term amelioration of S deficiencies. New research is using stable isotope tracer methods to improve understanding of the fate and transformations of S fertilizers. For sites where fertilization may not be feasible, soil conservation is particularly important for preventing further losses of limited S.
Sanborn, P., Brockley, R.P.. 2005. Sulphur Deficiencies in Lodgepole Pine: Occurrence, Diagnosis, and Treatment. British Columbia Ministry of Forests, Lands, Natural Resource Operations and Rural Development. Extension Note (FLNRORD). EN71
Topic: FLNRORD Research Program
Keywords: Fertilization
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