COMPATIBLE GROWTH AND YIELD SYSTEM FOR Pinus patula EVEN-AGED STANDS

Abstract

The growth and yield system for Pinus patula was developed using explicit whole-stand-approach models. The data was obtained from three consecutive re-measurements of 42 permanent plots, 400 m² each, established on a chrono sequence at Zacualtipán, Hidalgo, México. Forest productivity was estimated using an anamorphic dominant height family based on the Hossfeld IV model and linked to equations of basal area, mean diameter, and total volume, with a seemingly unrelated regression fitting technique. Mortality was fitted to a simple exponential mortality function through non-linear least squares method. When simulating the scenario of site average productivity, the attained model estimated a 25-year rotation for maximizing total volume, which contrasts with the empirical 50-year rotation used in the region since 1980.