Researchers sought to determine the impact of commercial thinning practices on defoliation recovery by examining the ability of red spruce and balsam fir to recover from defoliation by storing non-structural carbohydrates (NSC's) used for foliar growth and secondary defensive compounds such as lignins and tannins.
Examine unthinned stands and stands with 50% of trees removed to determine the impact of thinning on NSC content in tree tissues. Compare upper crown foliage for production of secondary defensive compounds. Defoliate trees to test lignin and tannin responses.
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Status - Active
Start date: 2013-01-01