Curvas de altura-diametro de acácia negra (Acacia Mearnsii de Wild)

in the present study the height-diameter relationship of acacia mearnsii was analyzed for three different regions of rio grande do sul, brazil, using reforestations with age of eight, nine and ten years, planted with a spacing of 3 x 1.33m. among the regression models applied was selected prodan？s model with a determination coefficient (r2) of 0.98 and a mean standard error (sxy%) of less than 9%. analisis of covariance was applied to test parallelism of height-diameter curves of the different stands in the respective regions. the height-diameter relationships showed equal inclination for the different stands of every region which allowed the use of a unique curve to re-estimate the coefficient of intercept for each new observational plot in the respective region.