Comparison of Stand Density Measures as Predictor of Diameter Increment

Seven expressions of stand density were compared in regard to overstory tree diameter increment in eastern cottonwood (Populus deltoides Bartram ex Marsh.)-silver maple (Acer saccharinum L.)-American sycamore (Platanus occidentalis L.) forests. Basal area (BA), trees per hectare (TPH), percent stocking, stand density index (SDI), relative minimum density of full site occupancy (RMDFO), percent average maximum density (PAMD) and relative density (RD) were evaluated as expressions of stand density. Relative stand density measures seemed to be better predictors of average diameter increment than absolute density measures. In addition, relative density measures were identical in regard to their influence on the tree diameter increment.