Vegetation indices for the index estimation of the leaf area in clonal plantations of Eucalyptus saligna smith

Authors

DOI:

https://doi.org/10.5902/1980509816942

Keywords:

Regression analysis, Simple Ratio Index (SRI), LAI-2000, Landsat 8/OLI

Abstract

The relationship between the ground Leaf area index (IAFg) 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 (LAIRS), and obtaining the spatial distribution of LAI in the stands. LAIg 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 LAIRS (LAIRSi=β0 + β1 .IVi + εi), and the criteria for selecting the best equation were the statistics R2adj%, Syx % and residual analysis. The results showed that the best vegetation index to estimate IAFSR was SRI (LAIRS =-5.6159 + 0.9716 .SRI ), resulting R2adj%=67.0 and Syx=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 LAIRS.

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Author Biographies

Rute Berger, Universidade Federal Rural de Pernambuco, Recife, PE

Engenheira Florestal, Drª, Professora Adjunta do Departamento de Ciência Florestal, Universidade Federal Rural de Pernambuco.

José Antônio Aleixo da Silva, Universidade Federal Rural de Pernambuco, Recife, PE

Engenheiro Agrônomo, PhD, Professor Titular do Departamento de Ciência Florestal, Universidade Federal Rural de Pernambuco.

Rinaldo Luiz Caraciolo Ferreira, Universidade Federal Rural de Pernambuco, Recife, PE

Engenheiro Florestal, Dr., Professor Titular do Departamento de Ciência Florestal, Universidade Federal Rural de Pernambuco

Ana Lúcia Bezerra Candeias, Universidade Federal Rural de Pernambuco, Recife, PE

Engenheira Eletricista, Dra., Professora Associada do Departamento de Engenharia Cartográfica, Universidade Federal de Pernambuco.

Rafael Rubilar, Universidad de Concepción, Concepción, Chile

Engenheiro Florestal, PhD., Professor Associado do Departamento de Silvicultura, Universidad de Concepción.

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Published

2019-06-30

How to Cite

Berger, R., Silva, J. A. A. da, Ferreira, R. L. C., Candeias, A. L. B., & Rubilar, R. (2019). Vegetation indices for the index estimation of the leaf area in clonal plantations of Eucalyptus saligna smith. Ciência Florestal, 29(2), 885–899. https://doi.org/10.5902/1980509816942

Issue

Vol. 29 No. 2 (2019)

Section

Technical Note

License

A revista CIÊNCIA FLORESTAL reserva-se o direito de realizar, nos originais, alterações de ordens normativas, ortográficas e gramaticais, com vistas a manter o padrão escolar da língua, mas respeitando o estilo dos autores. As provas finais podem ou não ser enviadas aos autores.

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