Diameter-Density Relationships Provide Tentative Spacing Guidelines for 'Eucalyptus saligna' in Hawaii

摘要

Trials have been established in Hawaii to develop spacing guidelines for Eucalyptus saligna plantations. Substantial competition-related mortality occurred in densely planted plots of three spacing trials. Data on stand diameter and surviving number of trees on these plots were plotted in logarithmic form to estimate a 'self-thinning' or maximum diameter-stand density line. An 'operating' maximum line was defined--one representing 70% of the total number of trees that could reach the 'self-thinning' level. This information provides a guide to the number of E. saligna trees to plant per hectare for selected target diameters at harvest.