Phosphorus sorption and desorption characteristics of wetland soils from a subtropical reservoir

2010 ◽  
Vol 61 (5) ◽  
pp. 507 ◽  
Author(s):  
Wenzhi Liu ◽  
Guihua Liu ◽  
Siyue Li ◽  
Quanfa Zhang
Keyword(s):  
Water Conservation ◽  
Soil Phosphorus ◽  
Management Strategies ◽  
Exposure Period ◽  
Mean Value ◽  
Wetland Soils ◽  
Phosphorus Sorption ◽  
Retention Capacity ◽  
Amorphous Iron ◽  
Phosphorus Desorption

Water-level regulation results in alternating exposure and inundation of soils in reservoir fluctuation zones, which may significantly influence the phosphorus sorption and desorption processes in the soil. The present study investigated the phosphorus sorption and desorption properties of wetland soils in China's Danjiangkou Reservoir using a batch equilibrium technique. Results showed that the maximum phosphorus sorption ranged from 435 to 1429 mg kg−1, with an average of 771 mg kg−1. The maximum phosphorus sorption was found to be significantly related to amorphous iron (r = 0.883, P < 0.01) and pH (r = −0.333, P < 0.05), and the binding constant k was strongly correlated with the amorphous iron (r = 0.475, P < 0.01) and organic matter (r = −0.455, P < 0.01). The phosphorus desorption percentage varied from 8 to 44%, with a mean value of 24%. The present study implies that short-term inundation in reservoir fluctuation zones would result in soil phosphorus desorption to some extent, in spite of the considerable absorption ability in the exposure period. These results are useful for assessing the phosphorus retention capacity of wetland soils and optimising management strategies for water conservation in reservoir regions.

Evaluation of phosphorus retention equations for Manitoba soils

2008 ◽  
Vol 88 (3) ◽  
pp. 327-335 ◽  
Author(s):  
D V Ige ◽  
O O Akinremi ◽  
D N Flaten
Keyword(s):  
Soil Phosphorus ◽  
Calcareous Soils ◽  
Predictive Ability ◽  
Soil Samples ◽  
Soil Particle ◽  
Phosphorus Retention ◽  
Phosphorus Sorption ◽  
Retention Capacity ◽  
Manure Application ◽  
P Retention

One of the key factors in phosphorus management is the P retention capacity (PRC) of the soil. In our previous study, we formulated several equations for estimating the phosphorus retention capacity of Manitoba soils. The objectives of the current study were to evaluate these equations using independent soil samples and to evaluate the influence of manure application on the predictive ability of these equations. Forty representative surface soil samples (20 soils with history of manure application and 20 without manure application history) were collected from across Manitoba. The P retention index (P150) and Langmuir adsorption maximum (Smax) were determined in the laboratory. The measured P retention capacities were then compared with those estimated using the formulated equations. Surprisingly, P150, which was obtained from a single measurement, was more robust than Smax that was obtained from at least 17 measurements as the equations provided a better estimate of P150 than Smax. Equations that were based on soil particle sizes (either percent clay or percent sand) provided poor estimates of soil PRC for the whole soil collection. However, when the soils were grouped on a pH basis, soil particle size worked better for soils with pH <7 than for soils with pH ≥7. The equations also worked better for soils with pH similar to those of the soils that were used to formulate the P retention equations. The accuracy of the predicted P sorption capacity improved with the manured soils due to the direct influence of manure application on soil properties that influence P retention such as Ca and Mg. Overall, the combination of CaM3, MgM3 and AlOx provided the best estimate of the PRC of Manitoba soils. Key words: Soil phosphorus, calcareous soils, phosphorus sorption, phosphorus retention, phosphorus retention capacity, estimating phosphorus retention capacity

scholarly journals Influence of soil pH on inorganic phosphorus sorption and desorption in a humid brazilian Ultisol

2005 ◽  
Vol 29 (5) ◽  
pp. 685-694 ◽  
Author(s):  
Shinjiro Sato ◽  
Nicholas Brian Comerford
Keyword(s):  
Soil Ph ◽  
Ph Value ◽  
Tropical Soils ◽  
Inorganic Phosphorus ◽  
Phosphorus Sorption ◽  
Tropical Regions ◽  
P Sorption ◽  
Phosphorus Desorption ◽  
P Desorption ◽  
P Bioavailability

Liming is a common practice to raise soil pH and increase phosphorus (P) bioavailability in tropical regions. However, reports on the effect of liming on P sorption and bioavailability are controversial. The process of phosphorus desorption is more important than P sorption for defining P bioavailability. However few studies on the relationship between soil pH and P desorption are available, and even fewer in the tropical soils. The effects of soil pH on P sorption and desorption in an Ultisol from Bahia, Brazil, were investigated in this study. Phosphorus sorption decreased by up to 21 and 34 % with pH increases from 4.7 to 5.9 and 7.0, respectively. Decreasing Langmuir K parameter and decreasing partition coefficients (Kd) with increasing pH supported this trend. Phosphorus desorption was positively affected by increased soil pH by both the total amount of P desorbed and the ratio of desorbed P to initially sorbed P. A decreased K parameter and increased Kd value, particularly at the highest pH value and highest P-addition level, endorsed this phenomenon. Liming the soil had the double effect of reducing P sorption (up to 4.5 kg ha-1 of remaining P in solution) and enhancing P desorption (up to 2.7 kg ha-1 of additionally released P into solution).

scholarly journals Growth and yield responses under different grove floor management strategies for water conservation in young grapefruit trees

2019 ◽  
Vol 256 ◽  
pp. 108567 ◽  
Author(s):  
Catherine R. Simpson ◽  
Juan Carlos Melgar ◽  
Shad D. Nelson ◽  
Mamoudou Sétamou
Keyword(s):  
Water Conservation ◽  
Management Strategies ◽  
Growth And Yield ◽  
Yield Responses

Integrating legacy soil phosphorus into sustainable nutrient management strategies for future food, bioenergy and water security

2015 ◽  
Vol 104 (3) ◽  
pp. 393-412 ◽  
Author(s):  
Helen Rowe ◽  
Paul J. A. Withers ◽  
Peter Baas ◽  
Neng Iong Chan ◽  
Donnacha Doody ◽  
...  
Keyword(s):  
Nutrient Management ◽  
Soil Phosphorus ◽  
Management Strategies ◽  
Water Security ◽  
Sustainable Nutrient Management

A DIFFUSION INTERPRETATION OF SOIL PHOSPHORUS DESORPTION

Soil Science ◽  
1983 ◽  
Vol 135 (5) ◽  
pp. 322-326 ◽  
Author(s):  
A. N. SHARPLEY ◽  
L. R. AHUJA
Keyword(s):  
Soil Phosphorus ◽  
Phosphorus Desorption

Estimating soil phosphorus sorption saturation from Mehlich-3 data

2002 ◽  
Vol 33 (11-12) ◽  
pp. 1825-1839 ◽  
Author(s):  
Peter J. A. Kleinman ◽  
Andrew N. Sharpley
Keyword(s):  
Soil Phosphorus ◽  
Phosphorus Sorption

scholarly journals Iron oxides and organic matter on soil phosphorus availability

2016 ◽  
Vol 40 (4) ◽  
pp. 369-379 ◽  
Author(s):  
Jessé Rodrigo Fink ◽  
Alberto Vasconcellos Inda ◽  
Tales Tiecher ◽  
Vidal Barrón
Keyword(s):  
Organic Matter ◽  
Iron Oxides ◽  
Soil Phosphorus ◽  
Phosphorus Availability ◽  
Phosphorus Sorption ◽  
Effective Strategies ◽  
Phosphorus Sorption Capacity ◽  
Soil Components ◽  
Relationship Of ◽  
The Relationship

ABSTRACT Continuous crop expansion has led to a growing demand for phosphate fertilizers. A sound knowledge of the dynamics of phosphorus, and its interaction with iron oxides and organic matter, can be useful to develop effective strategies for sustainable management, especially in a scenario of increasing shortage of mineral phosphate resources. In this paper, we review the relationship of phosphate to iron oxides and organic matter, and its effect on phosphorus availability. Crops typically obtain phosphate from weathered minerals and dissolved fertilizers. However, the amount of phosphorus present in the soil solution depends on the extent to which it is adsorbed or desorbed by iron oxides, which may be influenced by interactions with organic matter. Therefore, systems for fertilizer recomendation based on methodologies considering interactions between soil components such as oxides and organic matter, and the phosphorus sorption capacity resulting from such interactions (e.g. residual P analysis), may be more reliable to ensure efficient, rational use of phosphate.

scholarly journals Transforming soil phosphorus fertility management strategies to support the delivery of multiple ecosystem services from agricultural systems

2019 ◽  
Vol 649 ◽  
pp. 90-98 ◽  
Author(s):  
Katrina A. Macintosh ◽  
Donnacha G. Doody ◽  
Paul J.A. Withers ◽  
Richard W. McDowell ◽  
Douglas R. Smith ◽  
...  
Keyword(s):  
Ecosystem Services ◽  
Soil Phosphorus ◽  
Management Strategies ◽  
Agricultural Systems ◽  
Fertility Management
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