Geoestatística na determinação espacial das variáveis dendrométricas em plantios de Mimosa caesalpiniifolia

Abstract

The settlements of Sabiazeiro has increased in the Northeast, to attend the demand for stakes, energy and fodder, being necessary studies that evaluate the growth and the determination of volume. In this way, the objective of this work was to evaluate the spatial variability of dendrometric data and cubing of Mimosa caesalpiniifolia under different spacings. Planting was carried out under four blocks, with each block consisting of five arrangements: 1,0m x 3,0m, 1,5mx 3,0m, 2,0mx 3,0m, 2,5mx 3,0m, 3,0mx 3,0m, each arrangement represented by 36 individuals, at seven years of age. The heights, diameters and volume were determined by means of sighting, tape measure, and neural networks, respectively, being submitted to the analysis spatial by means of semivariogram and ordinary kriging, obtaining the thematic maps. According to the results, it was verified that geostatistics estimated the spatial variability of the dendrometric characteristics and spacings 2,5m x3,0m, and 3,0m x3,0m resulted in higher values of diameter, height and volume, obtaining greater growth, being recommended for the installation of stands of Mimosa caesalpiniifolia.