Identification of Reaction Products from Phosphate Fertilizers in Soils

Lindsay, W. L.; Frazier, A. W.; Stephenson, H. F.

doi:10.2136/sssaj1962.03615995002600050013x

Cited by 148 publications

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“…2A). As reported by Lindsay et al (1962), the pH of a saturated solution of KH 2 PO 4 was 4.0. This implies that the salt applied was thoroughly dissolved and H + produced was transported down to the bottom without interaction.…”

Section: The Ph Profiles Of Mixturesupporting

confidence: 55%

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Diffusive phosphate transport in Al-rich acidic porous cation exchange system

Ro¹,

Cho²

2000

Can. J. Soil. Sci.

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Ro, H. M. and Cho, C. M. 2000. Diffusive phosphate transport in Al-rich acidic porous cation exchange system. Can. J. Soil Sci. 80: 551-560. One-dimensional diffusive phosphate transport in a porous cation-exchange resin model system was investigated to examine the effect of exchangeable Al on the movement of phosphate. This study presumes that Al interacts with phosphate and H + is produced as a result of deprotonation of H 2 PO 4 -. The production of H + due to interactions between positively charged Al ions and phosphate ions was confirmed by measuring the pH change during the titration of phosphate by aluminum or aluminum by phosphate ions. A set of cylindrical wax columns packed with: (A) a mixture of sand and solid Al 2 O 3 , (B) a mixture of sand and Al 3+ -saturated cation-exchange resin, (C) a mixture of sand, solid Al 2 O 3 , and Al 3+ -saturated cation-exchange resin, and (D) sand as a control was used. A 0.2-g sample of 32 P-KH 2 PO 4 was applied on the surface of the mixture in each column simulating one-dimensional diffusion from an instantaneous planar source into a semi-finite system. Retardation of phosphate transport by exchangeable Al 3+ was characterized by lowering of pH. Phosphate transport was not retarded in the presence of solid Al 2 O 3 alone. Phosphate movement was further retarded in the presence of exchangeable Al 3+ with solid Al 2 O 3 . Under this situation, H + ion produced from precipitation reactions dissolved solid Al 2 O 3 , giving rise to more Al 3+ in solution. Aluminum ion in the solution phase moved towards the site where phosphate was precipitated. From a mass balance of P, a slight amount of P was not recovered in the system whose pH was kept around 2.0 or below, indicating a probable formation of K-taranakite. Either Ktaranakite or K 2 Al 5 H 7 (PO 4 ) 8 ·14H 2 O was identified as a final precipitation product from a series of titration experiments. However, at least two unidentified morphologically different amorphous aluminum phosphates were observed. . Dans chaque colonne, une quantité de 0,2 g de 32 P-KH 2 PO 4 était déposée à la surface du mélange pour simuler la diffusion unidimensionnelle à partir d'une origine planaire instantanée en un système semi-fini. Le ralentissement de la migration des phosphates par les ions Al 3+ échangeable était marqué par un abaissement du pH. La migration des phosphates n'était, par ailleurs, pas ralentie dans la seule présence de Al 2 O 3 sous forme solide mais elle l'était lorsque Al était présent sous les deux formes. Dans cette dernière situation, les ions H + résultant des réactions de précipitation dissolvaient le Al 2 O 3 solide, enrichissant ainsi la solution d'ions Al 3+ . Les ions Al contenus dans la phase soluble migraient vers le site de précipitation des phosphates. Partant d'un bilan massique de P, une légère quantité de P n'était pas récupérée dans le système dont le pH était maintenu aux alentours de 2,0 ou plus bas, suggérant la formation probable de taranakite de K. Ce dernier composé ou le K 2 Al 5 H 7 (PO 4 ) g -...

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Section: The Ph Profiles Of Mixturesupporting

confidence: 55%

“…Lindsay et al (1962) identified approximately 30 crystalline phosphate compounds in addition to colloidal precipitates of variable composition as reaction products of various phosphate fertilizers. Hsu and Rennie (1962) reported a basic Al(OH) 2 H 2 PO 4 was formed by the addition of Al 3+ -resin into NaH 2 PO 4 solution.…”

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confidence: 99%

Diffusive phosphate transport in Al-rich acidic porous cation exchange system

Ro¹,

Cho²

2000

Can. J. Soil. Sci.

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“…LÍndsay and Stephenson (17) f ound that DCP Ð f ormed not only at the f ertiliser placement CaHPO (16) found DCPD precipitates remaining in filtrates for two months when soils were treated wíth saturated phosphate solutions. Larson g.I .e,1.…”

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confidence: 99%

Reaction Products of Applied Orthophosphates in Some Manitoba Soils as Affected by Soil Calcium and Magnesium Content and Time of Incubation

Strong

Racz

1970

Soil Science

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“…The higher levels of extractable P with (APP) could have resulted from the lower uptake of P from this treatment and / or the formation of fertilizer reaction products that were more soluble in the double-acid extractant. Although the fertilizer reaction products of (OP) and polyphosphate in soils have been studied (Savant and Racz, 1973;Lindsay et al, 1962;Philen andLehr, 1967, Fatma et a.l, 2013), no information is available concerning their solubilities in the double-acid extracting solution.…”

Section: The Soil Datamentioning

confidence: 99%

Ammonium Polyphosphate and Ammonium Orthophosphate as Sources of Phosphorus for Jerusalem artichoke

El-Sayed

Abbas²

2015

Alexandria Science Exchange Journal: An International Quarterly

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A field experiment was initiated in 2010 to compare the effects of liquid ammonium polyphosphate (APP) and granular diammonium phosphate (DAP) on growth, nutrient content, and yield of Jerusalem artichoke (Helianthus tuberosus L.). Two sites on a coarse-textured Inceptisol with markedly different cropping histories were selected, one with 6 ppm P, the other with >201 ppm P extractable with 0.05 N HCl+0.025N H 2 SO 4 .Fertilizers were banded at P rates of 0, 24,48, and 71 kg/Fed. at the low P site, and 0, 10, and 20 kg/Fed. at the high P site. At the low P site tuber yields and tissue P concentrations were lower in case of (APP) than that of (DAP), while tissue concentrations of Ca, Mg, Mn, and Zn were higher in case of (APP). At the high P site, tuber yield and top dry weight were not affected by P source, but tissue Ca and Mg contents were higher and tissue P was lower with (APP). In 2011 and 2012, (DAP) and(APP) were applied at a rate of 24 kg P/Fed. at the low P site. Tissue levels of P again were lower while these of Ca, Mg, Mn, and Zn were higher with (APP) for the two years. Tuber yields were lower with (APP) in 2012.In 2010, (DAP) and(APP) were applied at the high P site at the same rates used in 2010. Yields were unaffected by P source but tissue P content was lower but tissue Zn content was higher in case of (APP). Extractable P levels in soil samples taken after harvest were higher in 2010 for (APP) treatment .With time, extractable P declined for both sources, and by the following crop season, there were no differences in extractable P between P source. Extractable P again was higher in 2012 where (APP) had been applied. The results showed that availability of P fertilizer for summer planted Jerusalem artichoke was less with(APP) than that of (DAP). Less P was found in tops of Jerusalem artichoke with (APP) regardless of the level of available soil P. Tuber yields, however, were less affected by P source, and the data suggest that most years tuber yields will not be different with these two sources except on soil with very low levels of available P. Application of (APP) also resulted in increased uptake of Ca, Mg, Mn, and Zn by Jerusalem artichoke.

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Identification of Reaction Products from Phosphate Fertilizers in Soils

Cited by 148 publications

References 0 publications

Diffusive phosphate transport in Al-rich acidic porous cation exchange system

Diffusive phosphate transport in Al-rich acidic porous cation exchange system

Reaction Products of Applied Orthophosphates in Some Manitoba Soils as Affected by Soil Calcium and Magnesium Content and Time of Incubation

Ammonium Polyphosphate and Ammonium Orthophosphate as Sources of Phosphorus for Jerusalem artichoke

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