This study was performed in three stands of "cipres' de la cordillera" (Austrocedrus chilensis), at Horno de Barro, Lomas de Toro and Las Animas, in the Maitenrehue area (37 degrees 30'-39 degrees 37' S: 72 degrees 45'-73 degrees 00' W) located in the Nahuelbuta mountain range in the Araucania Region. This area is considered a glacial refuge for many species of the Chilean forests. By means of individual tree analyses and competition assessments, diameter increment models were built to explain and estimate diameter growth based oil dendrometric and dasometric variables. Data was gathered by stein analysis. The results presented refer to the diameter at chest level (1.3 m above soil level) (DAP) mean annual increment models for each sampled area, which involved a single predictive variable of girth breast height. Secondly, for the Maitenrehue area, a general model of DAP mean annual increments depended on the distance, and it involved variables related to the trees and competitors. Statistical differences amongst linear models for all areas analyzed reveals that A. chilensis is growing in diverse settings and with different growth patterns in response to intraspecific bind interspecific competition faced by this species.