INVESTIGADORES
MARTINEZ PASTUR Guillermo Jose
artículos
Título:
Stand growth model using volume increment/basal area ratios
Autor/es:
G MARTÍNEZ PASTUR; JM CELLINI; MV LENCINAS; P PERI
Revista:
FOREST SCIENCE
Editorial:
SOC AMER FORESTERS
Referencias:
Año: 2008 vol. 54 p. 102 - 108
ISSN:
0015-749X
Resumen:
Estimation of stand growth is crucial for forest planning. Usually was estimated using fixed values, and recently with growth equations. An alternative is through stand growth models. The objective was to develop a simple model for Nothofagus pumilio stands with full density along site quality and age gradients. Sample was obtained from 125 stands. Data of forest structure and samples for tree-ring measurement were taken in all trees to estimate growths using biometric models previously developed. The growth values of each plot during the last twenty years were calculated to fit the model, using the ratio of total volume increment/basal area as independent variable. The developed model gives a ratio between stand volume increment and basal area (m.year-1) in function to the site quality and stand age. The statistics (r²=0.819, mean error=0.019, absolute mean error=0.033), residual analysis and biological performance were satisfactory. The obtained stand growths varied between 1 to 20 m³.ha-1.year-1. This simple model allowed estimating growth values at stand level from easy field measurements from forest inventories.