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Growth Inhibitory Effects of Salal on Western Hemlock and Western Red Cedar

^a Dep. of Biol., Lakehead Univ., Thunder Bay, ON, Canada P7B 5E1
^b Dep. of Forest Sci., Univ. of Br. Columbia, Vancouver, BC, Canada V6T 1Z4

View larger version (22K): [in a new window]   Fig. 1 Treatment structure differentiating salal root and shoot competition and allelopathic effects

View larger version (33K): [in a new window]   Fig. 2 Mean ± SE of height, root length, basal diameter, and stem, needle and root dry weights of western hemlock seedlings after 9 mo of receiving (C) no competition (control), (R + S) root-plus-shoot competition, (S) shoot competition, and (R) root competition from salal. Histograms in each experiment topped by different letters are significantly different at (Tukey's multiple-range test)

View larger version (29K): [in a new window]   Fig. 3 Mean ± SE of height, root length, basal diameter, root, stem plus needle, and total dry weights of cedar seedlings after 9 mo of receiving (C) no competition (control), (R + S) root-plus-shoot competition, (S) shoot competition, and (R) root competition from salal. Histograms in each experiment topped by different letters are significantly different at (Tukey's multiple-range test)