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Bosque (Valdivia)

On-line version ISSN 0717-9200

Abstract

FLORES, FRANCISCO J  and  ALLEN, H. LEE. Climatic and soil water storage capacity effects on radiata pine productivity in Chile: An analysis using the model 3-PG. Bosque (Valdivia) [online]. 2004, vol.25, n.3, pp.11-24. ISSN 0717-9200.  http://dx.doi.org/10.4067/S0717-92002004000300002.

Radiata pine (Pinus radiata, D. Don) is planted across a wide range of soils and climate in Chile, and plantations exhibit a great variation in productivity. In order to effectively manage, we need to quantify potential productivity, determine the principal non-manipulated site and stand factors that determine the potential, identify which stands are currently performing below their expectations, determine which soil and/or stand limitations result in suboptimal production in these stands, and develop silvicultural treatment regimes to effectively ameliorate the identified limitations. To estimate potential productivity, we used the ecophysiological model 3-PG to provide estimates of stem wood production for fully stocked radiata pine plantations located in the VI to IX regions of Chile. 3-PG was also used to explore the effects of climate and soil water storage capacity on potential productivity. Potential productivity estimates for radiata pine from 3-PG ranged from 14 to 44 m3ha-1yr-1. Within the study area, precipitation was responsible for much of the variation in potential productivity. The model indicated considerable variation in the extent and magnitude of soil water limitations.

Keywords : Pinus radiata; 3-PG; potential productivity; process models; Chile.

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