2014
DOI: 10.4025/actasciagron.v36i3.17937
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<b>Mineralogy and phosphorus adsorption in soils of south and central-west Brazil under conventional and no-tillage systems

Abstract: ABSTRACT. The low phosphorus availability in tropical and subtropical soils, normally related to adsorption of phosphate to the minerals surfaces, can be attenuated when organic matter (OM) accumulates in the soils. Herein, we report the results of long-term experiments (18-32 years) aimed at quantifying the maximum phosphorus adsorption capacity (MPAC) and its determinant mineralogical variables in Brazilian soils and at assessing the effect of no-tillage (NT) in mitigating the phosphorus adsorption of soils.… Show more

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Cited by 53 publications
(39 citation statements)
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“…The specific surface area (SSA) has an expressive range, varying from 3.9 to 90.6 m 2 g -1 in the mineral soils and reaching values close to 140 m 2 g -1 in the Organosol (Table 3). This variation in SSA values, estimated by water adsorption, was positively related to the organic carbon content, as found in other studies (Tomasi et al, 2012;Fink et al, 2014), and inverse with the silt content (Table 4). When considering the profiles individually, it was observed that the profiles P1, P4 and P5, greater SSA values occurred in horizons with higher contents of clay and pedogenic iron oxide (Fed).…”
Section: Morphological and Physical Characterizationsupporting
confidence: 86%
“…The specific surface area (SSA) has an expressive range, varying from 3.9 to 90.6 m 2 g -1 in the mineral soils and reaching values close to 140 m 2 g -1 in the Organosol (Table 3). This variation in SSA values, estimated by water adsorption, was positively related to the organic carbon content, as found in other studies (Tomasi et al, 2012;Fink et al, 2014), and inverse with the silt content (Table 4). When considering the profiles individually, it was observed that the profiles P1, P4 and P5, greater SSA values occurred in horizons with higher contents of clay and pedogenic iron oxide (Fed).…”
Section: Morphological and Physical Characterizationsupporting
confidence: 86%
“…Amorphous iron (Fe) oxides in these soils form low-solubility complexes with phosphate, reducing the availability of this anion (Devau et al, 2011;Fink et al, 2014), which can also be influenced by humic acids (HAs) (Gerke, 2010). These interactions are surface phenomena which are influenced by various factors (Weng et al, 2012;Fink et al, 2014;Kleber et al, 2015).…”
Section: Introductionmentioning
confidence: 99%
“…Porém, a eficácia do fósforo adicionado ao solo varia dentre outros: com o tipo de fertilizante fosfatado (CORRÊA et al, 2008), com o método de aplicação (COSTA et al, 2009), e com a quantidade aplicada (RESENDE et al, 2006), além de variar com atributos do solo, como pH (VIÉGAS et al, 2010), umidade (RANNO et al, 2007), teor de argila (SIMÕES NETO et al, 2015), teor de Ca (BROGGI et al, 2010) e formas de Fe (FINK et al, 2014).…”
Section: Introductionunclassified