Variabilidade espacial dos atributos químicos do solo e dendrométricos em plantio de teca (Tectona grandis L. f. Lamiaceae) no município de Abaetetuba-PA.

Abstract

The study of spatial variability of soil chemical properties and attributes dendrometric is of fundamental importance for the proper management of forest plantations in order to reduce the impact economic, social and environmental. The use of geostatistics and geoprocessing in the context of the Precision Forestry enable the achievement of mapping the spatial variability of the attributes studied. The main objective this work was analyze the spatial variability of soil chemical properties and dendrometric attributes in planting of Tectona grandis L.f. Data were submitted to descriptive statistics, normality test, trend analysis and verification of spatial variability dependence by experimental semivariograms and then adjusting the variables that showed spatial dependence, finally realizing the ordinary kriging of data, generating maps of prediction and uncertainty of the variables under study. With these maps, the study was conducted of the relationship between soil chemical properties and dendrometric attributes through correlation analysis between maps (pixel-by-pixel). The results showed that the chemical variables of soil potassium (K), calcium (Ca), magnesium (Mg), Organic Matter (OM) and pH in water (pH H20) showed spatial dependence, while phosphorus (P), Aluminum (Al), Aluminum +Hydrogen (H + Al) and pH in KCl showed no spatial dependence. The dendrometric variables: DAP, Altura e Volume, showed dependence spatial .In general, areas with higher levels of DAP, height and volume had lower levels of nutrients, which can be assumed that these regions were the highest consumption of nutrients by the Tectona grandis L.f, this factor also is evident in the correlation matrix that maps, because have a weak correlation between soil chemical properties and dendrometric attributes.