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MAGNETIC SUSCEPTIBILITY AS INDICATOR OF SOIL QUALITY IN SUGARCANE FIELDS

2017; UNIVERSIDADE FEDERAL RURAL DO SEMI-ARIDO; Volume: 30; Issue: 2 Linguagem: Inglês

10.1590/1983-21252017v30n203rc

ISSN

1983-2125

Autores

MARIANA DOS REIS BARRIOS, José Marques Júnior, Sammy Sidney Rocha Matías, Alan Rodrigo Panosso, Diego Silva Siqueira, Newton La Scala,

Tópico(s)

Geochemistry and Elemental Analysis

Resumo

ABSTRACT Sugarcane management practices (unburned cane - UC and burned cane - BC) interfere with dynamics of soil magnetic properties. This study focused on determining the potential of magnetic susceptibility as soil quality indicator in areas under sugarcane cultivation. The experiment area is on the limit between basalt from São Bento Group, Serra Geral Formation, and sandstone from Bauru Group - Adamantina Formation. Twenty soil samples were collected from two management areas (burned and unburned sugarcane prior to harvest) at a depth range of 0.0-0.2 m. Local soil was classified as eutroferric Red Latosol (Oxisol), with highly clayey texture. Chemical and physical properties, CO2 emissions and magnetic susceptibility (MS) in air-dried fine earth (MSADFE), total sand fraction (MSTS) and clay fraction (MSCF). The magnetic signature from MS was effective in identifying changes of physical, chemical and mineralogical traits in Latosols under burned and unburned sugarcane crop. The information provided here can guide further studies on the genesis of minerals with magnetic expression in environments and exposed to fire burning.

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