/AnMtgsAbsts2009.55319 Estimating Regional Eucalyptus Productivity Using a Soil-Site Model and GIS in Chile.

Wednesday, November 4, 2009
Convention Center, Exhibit Hall BC, Second Floor
Eduardo C. Arellano, Marcelo Miranda, Aldo Norero and Horacio Gilabert, Departamento Ciencias Forestales, Pontificia Univ. Católica de Chile, Santiago, Chile
Chile has more than 330000 ha of Eucalyptus plantation concentrated between the 34 and 41°S, approximately. Eucalyptus productivity is quiet variable across the different locations. The objective of this work was to estimate the correlation between several soil-site properties and and E. globulus and E. nitens productivity for 2 regions in Chile based on 10 year-old Eucalyptus field measurements and incorporating satellite images (SRTM), and existing soil and site information for both regions. We first adjusted a productive model base on Eucalyptus stands information and the geographical location. We then included soil-site characteristics into the model. Finally we adjusted a non-parametric model to estimate the Eucalyptus variability across both regions using geographical and soil characteristics. Our model indicated that Eucalyptus productivity have a significant variability across the Coastal Range, the Andes Mountains and the central valley. The elevation, soil water holding capacity and the available N significantly affected Eucalyptus productivity across the two regions. Eucalyptus productivity is higher in the Andes Mountains with higher soil N and water holding capacity, associated with soil depth and texture.