Eberhardt D. N., Marchao R. L., Vendrame P. R. S., Corbeels M., Filho O. G., Scopel E., Becquer Thierry. (2021). Effect of Savanna windrow wood burning on the spatial variability of soil properties. Pesquisa Agropecuaria Tropical, 51, p. e66853 [10 p.]. ISSN 1517-6398.
Titre du document
Effect of Savanna windrow wood burning on the spatial variability of soil properties
Tropical Savannas cover an area of approximately 1.9 billion hectares around the word and are subject to regular fires every 1 to 4 years. This study aimed to evaluate the influence of burning windrow wood from Cerrado (Brazilian Savanna) deforestation on the spatial variability of soil chemical properties, in the field. The data were analysed by using geostatistical methods. The semivariograms for pH(H2O), pH(CaCl2), Ca, Mg and K were calculated according to spherical models, whereas the phosphorus showed a nugget effect. The cross semi-variograms showed correlations between pH(H2O) and pH(CaCl2) with other variables with spatial dependence (exchangeable Ca and Mg and available K). The spatial variability maps for the pH(H2O), pH(CaCl2), Ca, Mg and K concentrations also showed similar patterns of spatial variability, indicating that burning the vegetation after deforestation caused a well-defined spatial arrangement. Even after 20 years of use with agriculture, the spatial distribution of pH(H2O), pH(CaCl2), Ca, Mg and available K was affected by the wood windrow burning that took place during the initial deforestation.
Plan de classement
Pédologie [068]
;
Etudes, transformation, conservation du milieu naturel [082]
