2011
DOI: 10.1590/s0100-06832011000200017
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Frações de fósforo no solo em resposta à adubação fosfatada em um Latossolo com diferentes históricos de uso

Abstract: RESUMONo sistema plantio direto existe tendência de melhor aproveitamento do P, sobretudo em áreas cultivadas há mais tempo, mas há, ainda, necessidade de confirmação deste fato. Este trabalho teve como objetivo quantificar as frações inorgânicas e orgânicas de P e avaliar as respostas a diferentes doses de P do feijoeiro (Phaseolus vulgaris L.) e braquiária (Brachiaria decumbens) cultivados em sucessão, em amostras de um Latossolo com diferentes históricos de uso. O experimento foi realizado em casa de vegeta… Show more

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Cited by 15 publications
(16 citation statements)
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“…By using again the Mehlich-1 extractor as an example, it is found for the ration P 2and3 : P 1 = 180, an angular coefficient of 0.1109, which enables to infer that the increase provided into nutrient availability in soil, by applying 100 kg ha -1 P 2 O 5 in soybean sowing row (11.09 mg dm -3 P) is as twice as much of that found in the absence of phosphate fertilizer in the first year (5.345 mg dm -3 P). Decreases in P drain character in the soil, as the amount of nutrient applied increases, were also observed by Carneiro et al (2011), in clay texture Haplorthox. These authors found more significant increase in the fractions of labile inorganic and moderately labile P in soil cultivated for more than ten years in the no-tillage system, in relation to an adjacent soil under condition of native Cerrado vegetation after the fertilization of bean crop with four doses of P. In this study, the largest increase in the availability of P in soil previously cultivated with soybeans and corn was probably occupying sites of P fixation in the soil, which led to lower adsorption of P applied in the experiment.…”
Section: Resultsmentioning
confidence: 69%
See 1 more Smart Citation
“…By using again the Mehlich-1 extractor as an example, it is found for the ration P 2and3 : P 1 = 180, an angular coefficient of 0.1109, which enables to infer that the increase provided into nutrient availability in soil, by applying 100 kg ha -1 P 2 O 5 in soybean sowing row (11.09 mg dm -3 P) is as twice as much of that found in the absence of phosphate fertilizer in the first year (5.345 mg dm -3 P). Decreases in P drain character in the soil, as the amount of nutrient applied increases, were also observed by Carneiro et al (2011), in clay texture Haplorthox. These authors found more significant increase in the fractions of labile inorganic and moderately labile P in soil cultivated for more than ten years in the no-tillage system, in relation to an adjacent soil under condition of native Cerrado vegetation after the fertilization of bean crop with four doses of P. In this study, the largest increase in the availability of P in soil previously cultivated with soybeans and corn was probably occupying sites of P fixation in the soil, which led to lower adsorption of P applied in the experiment.…”
Section: Resultsmentioning
confidence: 69%
“…Furthermore, it decreases the contact between the soil colloids and phosphate ion, reducing the adsorption reactions (Carneiro et al, 2011). The mineralization of organic residues can also provide the release and redistribution of organic forms of P, more mobile in the soil and less susceptible to adsorption reactions (Rheinheimer & Anghinoni, 2003).…”
Section: Introductionmentioning
confidence: 99%
“…Some studies have investigated P fractionation in highly weathered soils under NT (SILVA et al, 2003;GALVANI et al, 2008;OLIBONE;ROSOLEM, 2010;CARNEIRO et al, 2011;BEUTLER, 2012). However, the results are conflicting.…”
Section: Introductionmentioning
confidence: 99%
“…Studies of the effect of different P sources, and modes of application in NT areas, have observed that P application (independent of the source and mode of application) increased soil Po concentrations (GALVANI et al, 2008;OLIBONE;ROSOLEM, 2010). However, when soils under NT and native Cerrado were compared, P fertilization was observed to result in decreased Po and increased Pi concentrations in NT areas when compared to untreated soils from Cerrado (SILVA et al, 2003;CARNEIRO et al, 2011;BEUTLER, 2012;RODRIGUES, 2013).…”
Section: Introductionmentioning
confidence: 99%
“…Além disso, a adsorção específica do ânion fosfato em solos torna o P pouco disponível às plantas e, consequentemente, exige adubações pesadas para um adequado suprimento desse nutriente (Novais et al, 2007;Eberhardt et al, 2008). O P em solos pode estar presente em diferentes formas: P-lábil; P-orgânico; P-adsorvido aos óxidos de ferro e alumínio; P-precipitado; e o P solúvel ou em solução (Carneiro et al, 2011;Tokura et al, 2011).…”
Section: Introductionunclassified