Soil Variables for Predicting Potential Phosphorus Release in Swedish Noncalcareous Soils

Börling, Katarina; Otabbong, Erasmus; Barberis, Elisabetta

doi:10.2134/jeq2004.9900

Cited by 76 publications

(55 citation statements)

References 40 publications

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“…Only 20 % of this was in an ALextractable form (and hence reactive in short-term laboratory experiments). This result can be compared to the study of Börling et al (2004), who reported results for Kungsängen and for eight other Swedish soil fertility experiments with similar P fertilization levels.…”

Section: Discussionsupporting

confidence: 54%

The pH dependence of phosphate sorption and desorption in Swedish agricultural soils

2012

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A number of previous studies have reported the existence of a minimum in phosphate solubility between pH 5.5 and 7 in non-calcareous soils. Different hypotheses have been forwarded to explain this phenomenon. In this study, ten soil samples with varying textures and phosphorus status were subjected to batch experiments in which dissolved phosphate was measured as a function of pH and phosphate load. Soil samples with more than 20 % clay all had a minimum phosphate solubility between pH 6 and 7, whereas for samples with < 10 % clay, no such minimum was observed. Further experiments involving additions of phosphate and arsenate showed an increasing adsorption of these anions with decreasing pH also below pH 6 in clay soils, suggesting that the pH dependence on adsorption and desorption in short-term experiments was not the same. Kinetic experiments showed that the increased phosphate desorption at lower pH values in noncalcareous clay soils was a quick process, which is consistent with adsorption/desorption being the most important mechanism governing the retention and release of inorganic P.Moreover, by comparing extraction results with batch experiment results for samples from a long-term fertility experiment, it was concluded that more than 60 % of the accumulated phosphate was occluded, i.e. not reactive within six days. Additional evidence for an important role of occluded phosphate comes from an analysis of the Freundlich sorption isotherms for the studied soils. It is hypothesized that interlayered hydroxy-Al and hydroxy-Fe polymers in clay minerals may be important for P dynamics in clay soils by trapping some of the P in an occluded form. The results also suggest that improved knowledge on the speciation and dynamics of phosphorus in soils is required for consistent mechanistically based modelling of phosphate sorption/desorption reactions.

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Section: Discussionsupporting

confidence: 54%

The pH dependence of phosphate sorption and desorption in Swedish agricultural soils

2012

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“…Olsen P was divided by PSI to get an estimate of the DPS (e.g., Westermann et al, 2001;Börling et al, 2004):…”

Section: Soil Sampling and Analysesmentioning

confidence: 99%

The Role of Subsoil as a Source or Sink for Phosphorus Leaching

et al. 2015

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The importance of subsoil features for phosphorus (P) leaching is frequently mentioned, but subsoil effects are still poorly documented. This study examined whether the subsoil of four agricultural Swedish soils (two sand and two clay) functioned as a source or sink for P leaching by measuring P leaching from intact soil columns with topsoil (1.05 m deep) and without topsoil (0.77 m deep) over 3 yr. One sandy soil with high topsoil P content (Olsen P, 84 mg kg , respectively). The other sandy soil, with high Olsen P content in the topsoil and subsoil (27 and 19 mg kg , respectively). High P content at depth (Olsen P, 21 mg kg -1 ) in one clay soil resulted in relatively higher subsoil DRP contribution (89%) to total leaching than observed in the other clay soil (71%). These results indicate that the subsoil can act as source or sink for P leaching, depending on P content, degree of P saturation, and P sorption capacity, and therefore subsoil properties should be considered when selecting mitigation measures to reduce P leaching.

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“…Em consequência, vários estudos já foram desenvolvidos sobre perdas de nutrientes na agricultura via escoamento superficial (Favaretto et al, 2006;Sharpley et al, 2001), inclusive no Brasil (Bertol et al, 2003Peles, 2007;Mori, 2008). Com relação à qualidade da água subterrânea associada a práticas agrícolas, ênfase vinha sendo dada ao N (Smith et al, 1990;Owens, 1994;White et al, 1998;Bakhsh et al, 2005;Basso et al, 2005;Bertol et al, 2005;Garg et al, 2005); no entanto, nos últimos anos tem se discutido também o transporte de P em subsuperfície Favaretto, 2002;Börling et al, 2004;Basso et al, 2005;Bertol, 2005;Fortune et al, 2005).…”

Section: Introductionunclassified

Perdas de nutrientes via subsuperfície em colunas de solo sob fertilização mineral e orgânica

Piovesan

Favaretto²,

Pauletti³

et al. 2009

Rev. Bras. Ciênc. Solo

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RESUMOO uso de dejetos de animais na produção agrícola pode ocasionar a contaminação ou poluição das águas por nutrientes, principalmente com aplicações consecutivas na mesma área. Nesse sentido, o objetivo deste trabalho foi avaliar o efeito da aplicação de dejeto líquido de bovinos e fertilizantes minerais na lixiviação de NH 4 + , NO 3 -, P e K. Para essa avaliação, foram coletadas colunas indeformadas de solo, num experimento de campo que estava sendo conduzido por sete anos consecutivos e que continha 12 tratamentos, resultantes da combinação de quatro doses de dejeto líquido de bovinos com três doses de fertilizante mineral. O experimento de campo era conduzido num Latossolo Bruno distrófico em sistema de plantio direto com sorgo, milho, aveia-preta e azevém em rotação. Em laboratório, essas colunas, de acordo com os respectivos tratamentos de campo, foram submetidas à aplicação do dejeto líquido de bovinos (0, 30, 60 e 90 m³ ha -¹, aplicados em dose única) e dos fertilizantes minerais (0, 50 e 100 % da dose recomendada para o milho -120, 60 e 60 kg ha -1 de N, P 2 O 5 e K 2 O). Imediatamente após a aplicação de dejeto e fertilizante, a água percolada por coluna foi coletada e analisada em cinco turnos contínuos, totalizando 516 mm -aproximadamente três volumes de poros. Constatou-se aumento nas concentrações de N-NH 4 + , P e K com as doses de dejeto e aumento de N-NO 3 -e K com as doses de fertilizante mineral. No entanto, com exceção do N-NO 3 -, as concentrações de N-NH 4 + e P estiveram abaixo do limite máximo permitido pela legislação brasileira, indicando a importância da infiltração de água no solo na redução do potencial poluidor dos dejetos.Termos de indexação: nitrato, amônio, P, K, lixiviação, dejeto líquido de bovinos, plantio direto, qualidade da água.

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Soil Variables for Predicting Potential Phosphorus Release in Swedish Noncalcareous Soils

Cited by 76 publications

References 40 publications

The pH dependence of phosphate sorption and desorption in Swedish agricultural soils

The pH dependence of phosphate sorption and desorption in Swedish agricultural soils

The Role of Subsoil as a Source or Sink for Phosphorus Leaching

Perdas de nutrientes via subsuperfície em colunas de solo sob fertilização mineral e orgânica

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