Effect of Organic Matter on Phosphate Availability

Dalton, J. D.; Russell, Glenn C.; Sieling, Dale H.

doi:10.1097/00010694-195203000-00002

Cited by 58 publications

(19 citation statements)

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“…In these soils, P fixation occurs in the form of Ca-P (Olsen et al, 1977) which is sparingly soluble. (iii) The calcium contained in PR combines with organic acids (organic acids contained in OMW and organic acids contained in soil), thereby reducing extractabe soil P. Dalton et al (1952), Moreno et al (1960), and Barrow (1989) found that one possibility for lowering P availability in soil is that the iron, aluminum or calcium combines with humic or organic acids released by the decomposition of organic matter. Kpomblekou-A and Tabatabai (1994) studied the ability of 19 lowmolecular weight organic acids to release P from PR.…”

Section: Omw and Pr (February 2001) And The Second Agronomic Applicatmentioning

confidence: 99%

Agronomic application of olive mill wastewaters with phosphate rock in a semi-arid Mediterranean soil modifies the soil properties and decreases the extractable soil phosphorus

Mechri¹,

Attia²,

Braham³

et al. 2007

Journal of Environmental Management

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Section: Omw and Pr (February 2001) And The Second Agronomic Applicatmentioning

confidence: 99%

Agronomic application of olive mill wastewaters with phosphate rock in a semi-arid Mediterranean soil modifies the soil properties and decreases the extractable soil phosphorus

Mechri¹,

Attia²,

Braham³

et al. 2007

Journal of Environmental Management

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“…Plant uptake of P requires phosphate in soil solution (Barrow 1978;Syers et al 2008); therefore, mechanisms that decrease the strength and magnitude of phosphate sorption (which in turn increase the amount of phosphate in, and passing through, soil solution) may act as controls on net primary productivity. Organic matter additions have long been hypothesized to play a role in altering soil phosphate sorption (Bauer 1921;Dalton et al 1952) and proposed mechanisms can be divided into two categories: (i) organic matter effects on increasing microbial competition for soil solution phosphate, and (ii) organic matter effects on soil physicochemical properties. Here we focus on the role of organic matter inputs on altering phosphate sorption through effects on soil chemistry.…”

Section: Introductionmentioning

confidence: 99%

“…Support for the hypothesis that organic matter additions not only serve as P inputs but also have the potential to decrease soil phosphate sorption through physicochemical effects can be found in investigations in agricultural systems (Dalton et al 1952;Moshi et al 1974;Negassa et al 2008;Nziguheba et al 2000;Ohno and Crannell 1996) and a pine plantation (Bhatti et al 1998). The ability of litter inputs to influence phosphate sorption through effects on soil chemistry has been less studied in tropical forests.…”

Section: Introductionmentioning

confidence: 99%

Leaf litter inputs decrease phosphate sorption in a strongly weathered tropical soil over two time scales

2012

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In strongly weathered soils, leaf litter not only returns phosphorus (P) to the soil environment, it may also modify soil properties and soil solution chemistry, with the potential to decrease phosphate sorption and increase plant available P. Using a radioactive phosphate tracer ( 32 P) and 1 h laboratory incubations we investigated the effect of litter inputs on phosphate sorption over two time scales: (1) long-term field litter manipulations (litter addition, control and litter removal) and (2) pulses of litter leachate (i.e. water extracts of leaf litter) from five species. Leachate pulse effects were compared to a simulated throughfall, which served as a control solution. Soil receiving long-term doubling of leaf litter maintained five-fold more phosphate in solution than the litter removal soil. In addition to the quantity of phosphate sorbed, the field litter addition treatment decreased the strength of phosphate sorption, as evaluated through extraction of sorbed 32 P using a weakly acidic ammonium fluoride solution (Bray 1). In litter removal soil, leachate pulses significantly reduced phosphate sorption in comparison to the throughfall control for all five species evaluated. However, the ability of leachate pulses to reduce phosphate sorption decreased when soil had received field litter inputs. Across soils the effect of leachate pulses on phosphate sorption increased with net sorption of dissolved organic C, with the exception of leachate from one species that had a higher index of aromatic C concentration. These results demonstrate that litter inputs, as both long-term inputs and short-term leachate pulses, can decrease the quantity and strength of phosphate sorption, which may increase the biological availability of this key nutrient.

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“…However, it seems more likely that this is indicative of soils with adsorption sites suitable for both phosphate and organic anions, rather than of adsorption of phosphate by organic matter (Hinga, 1973). Competition between organic matter and phosphate for adsorption sites on soils is thought to be due to the chelating ability of hydroxyl-carboxyl ligands found in soil organic matter (Dalton et al, 1952;Levesque & Schnitzer, 1967;Reddy et al, 1980;Parfitt, 1979).…”

Section: Introductionmentioning

confidence: 99%

Competitive adsorption of humus acids and phosphate on goethite, gibbsite and two tropical soils

Sibanda

Young

1986

Journal of Soil Science

189

105

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Competition in adsorption between humic acid (HA) or fulvic acid (FA) and phosphate on synthetic goethite, gibbsite and two tropical soils was studied. The results for both goethite and gibbsite showed that HA and FA competed strongly with phosphate for adsorption sites at low pH values. The soils showed a similar result with a reduction in phosphate adsorption resulting from the addition of HA at the pH of the soils. The competition between HA and phosphate at different pH levels is illustrated by comparing the adsorption envelopes for phosphate on goethite, gibbsite and the two soils in the presence and absence of HA. The trends observed may be explained by the relative positions of the maximum buffer-power (buffer capacity) of the organic acids and of phosphoric acid which are shown to lie in different pH ranges.

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Effect of Organic Matter on Phosphate Availability

Cited by 58 publications

References 0 publications

Agronomic application of olive mill wastewaters with phosphate rock in a semi-arid Mediterranean soil modifies the soil properties and decreases the extractable soil phosphorus

Agronomic application of olive mill wastewaters with phosphate rock in a semi-arid Mediterranean soil modifies the soil properties and decreases the extractable soil phosphorus

Leaf litter inputs decrease phosphate sorption in a strongly weathered tropical soil over two time scales

Competitive adsorption of humus acids and phosphate on goethite, gibbsite and two tropical soils

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