Kinetic Model for Phosphate Transport and Transformation in Calcareous Soils: I. Kinetics of Transformation

Enfield, Carl G.; Phan, To; Walters, David; Ellis, Rebecca

doi:10.2136/sssaj1981.03615995004500060010x

Cited by 43 publications

(17 citation statements)

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“…The interpretation of changes in P concentrations in soil solution has been modeled using a variety of approaches, such as adsorption model, sorption-transport model and multi-reaction model. Most of earlier simulations of P adsorption have been based on simple rate constants (Jones et al, 1984), such as Langmuir (Enfield et al, 1981), Freundlich (Shaviv and Shacher, 1989) and Elovich equations (Chien and Clayton, 1980). A few studies have used kinetic equations such as first-or second-order reaction rates to describe the P sorption in soils (Bowden et al, 1980;Beauchemin et al, 1996).…”

Section: Modeling Of Soil P Transformationmentioning

confidence: 99%

Soil Phosphorus Tests and Transformation Analysis to Quantify Plant Availability: A Review

Zhang¹

2012

Soil Fertility Improvement and Integrated Nutrient Management - A Global Perspective

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Section: Modeling Of Soil P Transformationmentioning

confidence: 99%

Soil Phosphorus Tests and Transformation Analysis to Quantify Plant Availability: A Review

Zhang¹

2012

Soil Fertility Improvement and Integrated Nutrient Management - A Global Perspective

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“…Early work suggested that the solubility of P in calcareous soils was controlled by Ca 2+ activity and pH (Marion and Babcock 1977;Lindsay 1979;Enfield et al 1981) and may be influenced by the activity of other cations in soil solution (Havlin and Westfall 1984;Akinremi and Cho 1991). In spite of this, Beauchemin (1996) showed that a significant portion of the total P concentration of drainage water from soils with calcareous substratum could be explained by the variation in the P w content and the Pi ox /(Al ox + Fe ox ) ratio of A horizons.…”

Section: Suitability Of P Saturation Indices For P Management In Québmentioning

confidence: 99%

Soil phosphorus saturation degree: Review of some indices and their suitability for P management in Québec, Canada

Beauchemin¹,

Simard²

1999

Can. J. Soil. Sci.

147

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Beauchemin, S. and Simard, R. R. 1999. Soil phosphorus saturation degree: Review of some indices and their suitability for P management in Québec, Canada. Can. J. Soil Sci. 79: 615-625. Many agricultural fields contain excessive labile soil P in regard to crop needs. Its environmental fate must be assessed. The concept of P saturation degree is meaningful as it describes the portion of the soil binding sites already covered with P, and indicates the potential desorbability of soil P. The first objective of this study was to review different indices that have been proposed to estimate the degree of soil P saturation and the relationships between soil P saturation degree and P solubility. The second objective is to discuss their suitability as environmental indicators for P management in the province of Québec, Canada. In the Netherlands, the P saturation index is defined as the ratio of P to Al + Fe contents extracted by ammonium oxalate [P ox /(Al ox + Fe ox ) or (P ox /0.5(Al ox + Fe ox )]. This approach has been mainly used with non-calcareous soils. In Québec, the ratio of Mehlich-III extractable P to Al (M3P/AlM3) is proposed as an alternative, which relies on routine laboratory test. However, the suitability of the M3P/AlM3 ratio has yet to be determined for some specific soil groups (e.g. gleyed soils, soils with Al ox content >6 g kg -1 ) and for subsoil horizons. Regardless of the chosen index, it is suggested that the best way to manage the risk of water contamination by P in Québec (namely, defining critical levels of soil P saturation) may be to form homogeneous soil groups to account for their distinctive behaviour and characteristics.Key words: Phosphorus, saturation, management Beauchemin, S. et Simard, R. R. 1999. Degré de saturation en P du sol: revue de quelques indices et de leur utilité pour la gestion du P au Québec, Canada. Can. J. Soil Sci. 79: 615-625. Plusieurs sols agricoles présentent des teneurs excessives en P labile comparées aux besoins des cultures. Le devenir environnemental de ce P doit être évalué. La notion de degré de saturation en P d'un sol est particulièrement intéressante parce qu'elle donne une mesure de la proportion des sites de sorption déjà occupés par le P tout en indiquant le potentiel de désorption du P. Le premier objectif de cette étude est de revoir différents indices qui ont été proposés pour estimer le degré de saturation en P du sol et la fiabilité de ces indices à prédire la solubilité du P dans différents types de sol. Le deuxième objectif est de faire ressortir certains aspects à considérer pour favoriser pleinement leur utilisation comme indicateurs environnementaux dans la gestion du P pour la province de Québec, Canada. En Hollande, l'index de saturation en P est défini par le rapport entre le contenu en P et celui en Fe et Al extraits par l'oxalate d'ammonium [P ox /(Al ox + Fe ox ) ou (P ox /0.5(Al ox + Fe ox )]. Ces indices ont été étudiés principalement sur des sols non calcaires. Au Québec, le rapport entre le contenu en P et celui en Al extrait au...

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“…Several models have been developed to incorporate P kinetics with its transport processes [10][11][12][13][14][15][16]. These models can describe short-term laboratory experiments satisfactorily; they are also useful for design and operation of land treatment systems.…”

Section: Introductionmentioning

confidence: 99%

Muskegon Wastewater Land Treatment System: Fate and Transport of Phosphorus in Soils and Life Expectancy of the System

Zhang

Kendrick³

et al. 2006

Eng. Life Sci.

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The build-up of phosphorus (P) in soil is a major factor limiting the operating life of a wastewater land treatment system. In this study, effects of long-term wastewater application on changes in chemical properties, P profiles, and P adsorption capacity were evaluated in soils of the Muskegon wastewater land treatment plant that has been treating wastewater for > 30 years. Results indicate that the major soil properties have been changed. In the 15 cm topsoil, the pH increased from ∼ 5-6 in 1973 to ∼ 7.4-7.8 in 2003; the soil's total organic carbon (TOC) increased by 10-71 %; and the level of exchangeable Ca in 2003 is 8-9 times higher than that in 1973. The amount of Ca/Mg absorbed in the soil affects the P adsorption capability of the soil; Ca-and Mg-bound P accounts for > 70 % of the total P adsorbed in the soil. The net P accumulated in the Rubicon soil increased from ∼ 700 in 1993 to ∼ 1345 kg/ha soil in 2001, but the plant available P varied between ∼ 100-500 kg/ha soil during the same period, indicating a large amount of the applied P has become the fixed P that is unavailable to plants. P sorption in the soil consists of a fast adsorption and a slow transformation process. The soil's maximum P sorption capacity (P max ) (based on 1-day isotherm tests) has been increased by ∼ 2-4 times since 1973; the actual P max of the Muskegon soils could be much higher than the 1-day P max . Therefore, the life expectancy of the Muskegon system has been extended significantly with the application of wastewater.

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Kinetic Model for Phosphate Transport and Transformation in Calcareous Soils: I. Kinetics of Transformation

Cited by 43 publications

References 0 publications

Soil Phosphorus Tests and Transformation Analysis to Quantify Plant Availability: A Review

Soil Phosphorus Tests and Transformation Analysis to Quantify Plant Availability: A Review

Soil phosphorus saturation degree: Review of some indices and their suitability for P management in Québec, Canada

Muskegon Wastewater Land Treatment System: Fate and Transport of Phosphorus in Soils and Life Expectancy of the System

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