A Study on the Relationship between Canopy Shading Characteristics and Pine-Mushroom Positions Using a Computer Simulation Method
Chul-Chul Song, Sang-Won Bae, Hyun Park and Woo-Kyun Lee

 

ABSTRACT : Although the pine-mushroom is considered as a site-specific ectomycorrhizal mushroom, there is little scientific understanding for the stand structure of the forest. Therefore, this study was designed to clarify the stand structure of a pine-mushroom forest. Especially, the study was conducted to determine the effects of crown closure on pine-mushroom productivity through thorough examinati0n 0f the faators affecting stand structure, which in turn, provide a basic outline for the manipulation of stand structure of pine-mushroom stand . The experimental site was established in a pine-mushroom productive stand with southwestern aspect at Hongcheon, Korea. The occurrences of pine-mushroom were recorded for three years and the location , height, clear- length, crown-width of each tree were surveyed at 5 plots. The s urveyed data and topological characteristics of each plot were used for the simulation of practical crown projection by season and daily hours to examine the relationships between crown projection and the location of pine-mushroom occurrence. The pine-mushroom occurred in large amount 1-3 overlapped area(especially, double shaded area) of crown projection, while occurred little at the region which receives direct radiation or overlapped more than four times by crown projection. This phenomenon was distinctive during early summer (May to July) while it was obscure during spring or fall. It indicates that the manipulation of stand structure need to be applied during summer with considering the crown closure that should be kept double shading as a standard practical crown projection.

Key words : crown projection. stand structure, Tricholoma matsutake