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.

Bibliographic Details

Main Authors:	Eberhardt, Diogo, Marchao, Robélio, Siqueira Vendrame, Pedro Rodolfo, Corbeels, Marc, Guedes Filho, Osvaldo, Scopel, Eric, Becquer, Thierry
Format:	article biblioteca
Language:	eng
Subjects:	déboisement, propriété physicochimique, bois tropical, bois, distribution spatiale, Fixation de l'azote, utilisation des terres, caractéristiques du sol, andaineuse, andainage, fertilité du sol, http://aims.fao.org/aos/agrovoc/c_15590, http://aims.fao.org/aos/agrovoc/c_1521, http://aims.fao.org/aos/agrovoc/c_293007aa, http://aims.fao.org/aos/agrovoc/c_8421, http://aims.fao.org/aos/agrovoc/c_36230, http://aims.fao.org/aos/agrovoc/c_5196, http://aims.fao.org/aos/agrovoc/c_4182, http://aims.fao.org/aos/agrovoc/c_330883, http://aims.fao.org/aos/agrovoc/c_8400, http://aims.fao.org/aos/agrovoc/c_25674, http://aims.fao.org/aos/agrovoc/c_7170, http://aims.fao.org/aos/agrovoc/c_1070, http://aims.fao.org/aos/agrovoc/c_4847,
Online Access:	http://agritrop.cirad.fr/605890/ http://agritrop.cirad.fr/605890/1/ID605890.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!