Abiotic stabilization of organic phosphorus in the environment.

Celi, Luisella; Barberis, Elisabetta; Turner, B. L.; Frossard, Emmanuel; Baldwin, Darren S.

doi:10.1079/9780851998220.0113

Cited by 125 publications

(164 citation statements)

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“…38, NO. 22,2004 is immobile in soils, because it sorbs strongly to clays and reacts with metals to form insoluble precipitates (7,8). It is also difficult for organisms to access phytic acid once it is stabilized in soil (7).…”

Section: Discussionmentioning

confidence: 99%

“…Such dietary manipulations alter the phosphorus composition of manure and influence its fate in the environment. Phytic acid is immobile in soils, because it sorbs strongly to clays and reacts with metal oxides to form insoluble compounds (7,8). Other organic phosphates, such as phosphate diesters and simple phosphate monoesters, are only weakly retained in soil and can escape in leachate (9,10).…”

Section: Introductionmentioning

confidence: 99%

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Phosphorus Compounds in Sequential Extracts of Animal Manures: Chemical Speciation and a Novel Fractionation Procedure

Turner

Leytem

2004

Environ. Sci. Technol.

228

173

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Pollution of water bodies by phosphorus in runoff from soil amended with animal manures is one of the greatest threats to water quality in developed countries. The environmental fate of manure phosphorus is determined in part by its chemical composition, yet extraction procedures to assess this are poorly developed and provide no structural information. We used solution 31 P NMR spectroscopy to quantify phosphorus compounds in sequential extracts of three contrasting manures (broiler litter, beef-cattle manure, swine manure ►. Using a procedure originally developed for soils, but commonly applied to manures, phosphorus was extracted sequentially with deionized water, 0.5 M NaHCO 3, 0.1 M NaOH, and 0.5 M HCI. Water and NaHCO 3 extracted readilysoluble compounds, including phosphate, phospholipids, DNA, and simple phosphate monoesters, which are mobile in soil and biologically available. In contrast, NaOH and HCI extracted poorly soluble compounds, including phytic acid (myoinositol hexakisphosphate ► . The latter is immobile in soil and of limited biological availability. Based on these results, we developed a simplified two-step fractionation procedure involving extraction of readily soluble phosphorus in 0.5 M NaHCO3 followed by extraction of stable phosphorus in a solution containing 0.5 M NaOH and 50 mM EDTA.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Phosphorus Compounds in Sequential Extracts of Animal Manures: Chemical Speciation and a Novel Fractionation Procedure

Turner

Leytem

2004

Environ. Sci. Technol.

228

173

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“…Inositol hexakisphosphates are stable in aerobic soils due to their strong complexation with metals and clay surfaces (Celi and Barbaris, 2005). This means they are relatively unavailable to most crops (Richardson et al, 2005) and there is no evidence to suggest that they are available to rice growing in aerobic soils.…”

Section: Discussionmentioning

confidence: 99%

“…However, only relatively small proportions of the soil organic phosphorus were characterized and poor spectral resolution precluded identification of individual compounds in the phosphate monoester region. The latter is of significance due to the marked differences in behavior and potential bioavailability of the various phosphate monoesters (Celi and Barbaris, 2005).…”

Section: Introductionmentioning

confidence: 99%

Organic phosphorus in Madagascan rice soils

Turner

2006

Geoderma

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“…Soil sorption capacity differs among the various forms of P with phytate P being very tightly bound to soil while other P forms such as phosphates are more mobile (Celi and Barberis, 2005). Therefore, dietary factors that influence the amount of phytate P excreted by poultry could alter the solubility of the resultant excreta and impact their potential for P loss once applied to agricultural soils.…”

Section: Introductionmentioning

confidence: 99%

Phytate utilization and phosphorus excretion by broiler chickens fed diets containing cereal grains varying in phytate and phytase content

Leytem

Willing

Thacker

2008

Animal Feed Science and Technology

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Eighty, 12-day-old, male broiler chicks, were fed one of four diets to determine the effects of feeding grains varying in phytate phosphorus (P) and intrinsic phytase activity on ileal and excreta P digestibility and composition. The diets contained approximately 970.7 g grain kg −1 (maize, high fat-low lignin oat, normal barley or low-phytate barley) with the cereal supplying the sole source of dietary P. The diets were fed for a 7-day acclimation period followed by a 2 day excreta collection while ileal digesta was collected at slaughter on day 21. The coefficients of ileal apparent digestibility (CIAD) for P and phytate P ranged from 0.79 (normal barley) to 0.86 (maize and low-phytate barley) and 0.76 (low-phytate barley) to 0.89 (maize), respectively. The CIAD for phytate P was significantly greater in the maize and high fat-low lignin oat diets, while the low-phytate barley diet had the lowest coefficient (P>0.002). The coefficients of total tract apparent digestibility (CTTAD) for P and phytate P ranged from 0.25 (maize) to 0.35 (low-phytate barley) and 0.90 (maize and low-phytate barley) to 0.96 (high fat-low lignin oat), respectively, with no significant differences between diets. There was Abbreviations: AOAC, Association of Official Analytical Chemists; Ca, calcium; CIAD, coefficient of ileal apparent digestibility; Cr, chromium; CTTAD, coefficient of total tract apparent digestibility; P, phosphorus; 31 P NMR, 31-phosphorus nuclear magnetic resonance spectroscopy. Author's personal copy A.B. Leytem et al. / Animal Feed Science and Technology 146 (2008) 160-168 161 very little phytate P in excreta regardless of the type of grain fed (<0.13 of total P) with no significant differences between diets. Phytate P degradation was not related to the level of intrinsic phytase in the diet. In summary, current results indicate that, regardless of the type of grain fed, dietary phytate P is highly digestible when large amounts of calcium and P are not added into poultry diets and little phytate P is excreted.

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Abiotic stabilization of organic phosphorus in the environment.

Cited by 125 publications

References 0 publications

Phosphorus Compounds in Sequential Extracts of Animal Manures: Chemical Speciation and a Novel Fractionation Procedure

Phosphorus Compounds in Sequential Extracts of Animal Manures: Chemical Speciation and a Novel Fractionation Procedure

Organic phosphorus in Madagascan rice soils

Phytate utilization and phosphorus excretion by broiler chickens fed diets containing cereal grains varying in phytate and phytase content

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