Avaliação dos índices de vegetação NDVI e VARI na identificação fitossanitária da Araucaria angustifólia (Bert.) O. KTZE

Abstract

Remote Sensing has been increasingly used in the forestry area, because it helps to obtain accurate information from various types of sensors, along with technological advances with the use of Unmanned Aerial Vehicles (UAV), assisting in mapping areas of crops to areas of native vegetation in various studies. With the cameras attached to this type of equipment, the use of RGB and multispectral sensors has been increasingly extended, and with these sensors it has become possible to use multispectral indices that evaluate the vegetation cover of a given area, from its spectral signature. Indices such as NDVI are used for monitoring vegetation changes, pointed out as indicators of growth and vigor in conjunction with many other indices such as VARI, diagnosing various biophysical parameters in relation to the leaf index. It was from the observation of these indices that the possibility of identifying the phytosanitary vigor of individuals of Araucaria angustifolia was verified with the help of these technologies, and can help in the understanding of remnants of this species, classifying them as healthy, stressed, devitalized or dead.