Modelling tree diameter growth of plantation grown Dryobalanops sumatrensis
2006
Ahmad Zuhaidi Yahya
This paper examines the diameter growth of planted Dryobalanops sumatrensis based on the results ofmeasurements for all trees with diameter ≥ 10 cm collected between 1997 and 2000. The study was carriedout at Bukit Lagong Forest Reserve, Selangor, Peninsular Malaysia. Least square method using transformedand weighted models was developed to relate periodic annual diameter increment to diameter, competitionindices and environmental factors as independent variables. The results indicated that transformed modelrelating periodic annual diameter increment to diameter, competition indices (basal area and over-toppingbasal area) and environmental variables (elevation and slope) explained a significant proportion of thevariation in the periodic annual diameter increment at 36.7% (p < 0.05). Overall results of the modellingwere negatively biased and underestimated the predicted periodic annual diameter increments of thespecies.
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