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The relationship between the ground Leaf area index (IAF g ) from clonal plantations of Eucalyptus saligna Smith and three different vegetation indices (VI): Normalized Difference Vegetation Index (NDVI), Simple Ratio Index (SRI) and Soil Adjusted Vegetation Index (SAVI) was evaluated in order to select the best IV to estimate the IAF by remote sensing (LAI RS ), and obtaining the spatial distribution of LAI in the stands. LAI g was measured using LAI-2000 and its behavior was examined at different ages. The vegetation indices were obtained from a Landsat 8/OLI through the arithmetic of the bands 4 and 5. The linear regression analysis was used to adjust the model LAI RS (LAI RSi =β 0 + β 1 .IV i + e i ), and the criteria for selecting the best equation were the statistics R 2 adj %, S yx % and residual analysis. The results showed that the best vegetation index to estimate IAF SR was SRI (LAI RS =-5.6159 + 0.9716 .SRI ), resulting R 2 adj %=67.0 and S yx =12.5%. The results of all adjusted models tended towards overestimation of LAI in values lower than two and underestimation in values above 3.5 (NDVI e SRI) and above three for SAVI. The equations for different ages produced no improvement in LAI RS .

Índices de vegetação para a estimativa do Índice de Área Foliar em plantios clonais de <i>Eucalyptus saligna</i> Smith