Canadian Forest Service Publications
Etude de carie dans une plantation d'épinettes blanches fertilisées. 1976. Lachance, D. s.n., S.l. Rapport d'information LAU-X-18. 24 p.
Issued by: Laurentian Forestry Centre
Catalog ID: 15438
Availability: PDF (download)
No significant effect on frequency and volume of decay was observed in a white spruce plantation ten years after application of: urea at the rate of 0, 128 and 256 kg/ha (0, 114 and 228 lbs/acre); K2SO4 at the rate of 0, 112 and 224 kg/ha (0, 100 and 200 lbs/acre); MgSO4 at the rates of 0 and 224 kg/ha (0 and 200 lbs/acre); or combinations of these three fertilizers.
Other studies made in the course of this experiment showed that over a period of 10 years, sound dominant and co-dominant trees grew 27.3% more in volume that trees of the same group found with decay at the end of the period. In addition, growth reduction appeared to increase with increasing volume of decay within a tree. In general, larger trees had a larger decay volume than smaller ones, but on the basis of the total volume of the tree, losses were greater on smaller trees. Total decay volume represented 2.7% of the total volume of the stand. Polyporus tomentosus, a root and butt decay fungus of conifers, was responsible in frequency and in volume for about two-thirds of the losses.