Site index for forest plantations of Handroanthus serratifolius in Ucayali, Perú
DOI:
https://doi.org/10.55873/gentryana.v4i1.358Keywords:
Dominant height, site index, forest growth models, silvicultural planningAbstract
This study developed, for the first time, a site index model for Handroanthus serratifolius ("yellow tahuarí") in the Ucayali region of Peru, aiming to assess its productivity in forest plantations. Data on dominant height and age were collected from 123 trees distributed across 11 experimental sites. The Schumacher (exponential) and Chapman-Richards (sigmoidal) models, both widely used in forest modeling, were applied. The base age was set at 15 years. The models were fitted using nonlinear regression and evaluated using statistical indicators such as R², RMSE, AIC, and BIC. The Chapman-Richards model showed better predictive performance (R² = 0.83; RMSE = 1.77 m), more accurately capturing the species' sigmoidal growth. Anamorphic site index curves were generated, which are useful for comparing site quality among plantations. The results provide key tools for the sustainable forest planning of H. serratifolius, enabling its application in forest management, restoration, and utilization programs in the Peruvian Amazon.
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