Effect of Savanna windrow wood burning on the spatial variability of soil properties

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Abstract

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.

KEY WORDS: Wildfire, soil digital mapping, soil fertility.

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Author Biography

Robélio Leandro Marchão, EMBRAPA CERRADOS

PESQUISADOR A DO NÚCLEO DE PRODUÇÃO ANIMAL DA EMBRAPA CERRADOS

ATUA NOS SEGUINTES TEMAS: SISTEMA PLANTIO DIRETO, SISTEMAS INTEGRADOS DE PRODUÇÃO SUSTENTÁVEIS, IMPACTO AMBIENTAL PELO USO AGRÍCOLA, QUALIDADE DO SOLO, FÍSICA DO SOLO, ESPECTROSCOPIA NIR

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Published

2021-06-28

How to Cite

EBERHARDT, D. N.; MARCHÃO, R. L. .; VENDRAME, P. R. S.; CORBEELS, M.; GUEDES FILHO, O.; SCOPEL, E.; BECQUER, T. Effect of Savanna windrow wood burning on the spatial variability of soil properties. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], Goiânia, v. 51, p. e66853, 2021. Disponível em: https://revistas.ufg.br/pat/article/view/66853. Acesso em: 2 jan. 2025.

Issue

Vol. 51 (2021)

Section

Special Supplement: Cerrado [Brazilian Savanna]

License

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