Sorption of Organic Phosphorus Compounds in Atlantic Coastal Plain Soils

Leytem, April B.; Mikkelsen, Robert L.; Gilliam, J. W.

doi:10.1097/00010694-200210000-00003

Cited by 95 publications

(58 citation statements)

References 17 publications

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“…Phosphate is relatively soluble in soils, whereas phytate is retained and is less likely to be lost in runoff (Anderson et al, 1974;Leytem et al, 2002). Our findings indicated that the majority of the P in swine feces was present as the more soluble phosphate form rather than as phytate.…”

Section: Discussionmentioning

confidence: 67%

Phosphorus utilization and characterization of excreta from swine fed diets containing a variety of cereal grains balanced for total phosphorus1

Leytem

Thacker

2010

Journal of Animal Science

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the World Wide Web at:The online version of this article, along with updated information and services, is located on www.asas.org at University of Idaho Library #2 on June 28, 2010. jas.fass.org Downloaded from ABSTRACT: Intrinsic phytase in swine feeds may increase phytate utilization and alter the solubility of the excreted P. The objective of this experiment was to quantify changes in fecal P composition from swine fed a variety of cereal grains containing a range of phytate concentrations and endogenous phytase activities. Twenty-five crossbred barrows (89.3 ± 6.8 kg) were fed 1 of 5 dietary treatments that were based on wheat, corn, barley, low-phytate barley, or high-fat-low-lignin oats. Experimental diets were formulated to contain 75% of the test grain and were fed for a 7-d acclimation period followed by a 3-d fecal collection period. Total-tract apparent digestibility coefficients were determined for DM, P, and phytate using an indicator method. Fecal P was characterized using solution-state 31 P nuclear magnetic resonance spectroscopy. Watersoluble P (WSP) and WSP-to-total P (TP) ratio were determined in the feces. Apparent total-tract digestibility coefficients for P and phytate ranged from 0.33 (barley) to 0.45 (low-phytate barley) and from 0.20 (corn) to 0.79 (oats), respectively. The majority of P excreted in the feces was in the form of phosphate (>47% of TP), and phytate degradation was not related to the endogenous phytase activity in the diet. There was a positive linear relationship between dietary NDF and apparent total-tract phytate digestibility (r 2 = 0.82; P = 0.03), indicating that greater dietary fiber content may enhance microbial breakdown of phytate in the hindgut. There was a negative relationship between the fecal WSP-to-TP ratio and the percentage of TP that was in the form of phytate in the feces. In summary, our results indicate that the majority of P in the feces of pigs fed diets based on cereal grains is present in the form of phosphate and relatively small amounts of phytate were contained in the excreta. The exception to this was the corn diet, for which 45% of the total fecal P was in the form of phytate. Hydrolysis of phytate in the gut did not appear to be related to the content of either phytate or phytase in the grain, but was related to dietary fiber concentration.

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Section: Discussionmentioning

confidence: 67%

Phosphorus utilization and characterization of excreta from swine fed diets containing a variety of cereal grains balanced for total phosphorus1

Leytem

Thacker

2010

Journal of Animal Science

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“…These correlations may be explained by sorption reactions. Since P is bound by two ester linkages in diesters, these compounds have a lower charge density and less ionic interaction or ability to sorb to soil than monoesters or inorganic P (e.g., Leytem et al 2002). A small part of monoesters is comprised of inositol phosphates from soil biota and plants where it is vital for hormone action (Stryer 1988;Gressel et al 1996).…”

Section: Pyrophosphatementioning

confidence: 99%

Chemical Nature and Diversity of Phosphorus in New Zealand Pasture Soils Using 31P Nuclear Magnetic Resonance Spectroscopy and Sequential Fractionation

McDowell

Condron

Stewart

et al. 2005

Nutr Cycl Agroecosyst

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Information on the phosphorus (P) forms of pasture soils is central to agricultural and environmental sustainability. We used a combination of 31 P nuclear magnetic resonance (NMR) spectroscopy of NaOH-EDTA extracts and sequential fractionation to investigate P forms, with an emphasis on organic P in relation to environmental and biophysical variables, in 24 diverse pasture soils taken from around New Zealand (organic C 19-102 g kg À1 , total P 116-2746 mg kg À1 , pH 5.2-7.0). Soils were separated by cluster analysis of soil physicochemical properties and sequentially extracted P pools into those either derived from volcanic-ash materials or not. This separation was also evident for organic P species in NaOH-EDTA extracts, which removed about 75% of total soil organic P. The major organic P compound class was monoesters (24-60% of extracted P), made up of 14 to 91% myo-inositol hexakisphosphate. The next largest organic P class was diesters (0-4% of P extracted), which were enriched in volcanic-ash soils (monoester to diester ratio = 14) compared to non volcanic-ash soils (ratio = 30). Correlation analysis indicated that mean annual temperature had a significant negative and positive effect on monoester and diester concentrations, respectively. This was attributed to better physical protection of monoesters (especially inositol phosphates) from mineralization, and increased diesters from microbial activity and biological turnover. The anomalous behaviour of volcanic-ash soils was attributed to slow mineralization and the sampling of soils at different times of year without full knowledge of the large and highly dynamic microbial biomass P pool which is predominantly diesters.

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“…The adsorption capacity of metal oxides for IP 6 increases as soil pH decreases (Celi et al, 2001), which renders associations with calcite and organic matter less important (Celi and Barberis, 2007). Association between IP 6 and soil organic matter might occur via physical or chemical incorporation within organic matter structures, or through adsorption to organic matter via metal bridges (Celi and Barberis, 2007), although only the latter mechanism has been demonstrated experimentally (Leytem et al, 2002). In acidic soils, associations with amorphous Al and Fe hydroxides are believed to be the most important mechanism of IP 6 stabilization (Celi and Barberis, 2007).…”

Section: Introductionmentioning

confidence: 99%

Identification of inositol hexakisphosphate binding sites in soils by selective extraction and solution 31P NMR spectroscopy

Jørgensen

Turner²,

Reitzel

2015

Geoderma

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Sorption of Organic Phosphorus Compounds in Atlantic Coastal Plain Soils

Cited by 95 publications

References 17 publications

Phosphorus utilization and characterization of excreta from swine fed diets containing a variety of cereal grains balanced for total phosphorus1

Phosphorus utilization and characterization of excreta from swine fed diets containing a variety of cereal grains balanced for total phosphorus1

Chemical Nature and Diversity of Phosphorus in New Zealand Pasture Soils Using 31P Nuclear Magnetic Resonance Spectroscopy and Sequential Fractionation

Identification of inositol hexakisphosphate binding sites in soils by selective extraction and solution 31P NMR spectroscopy

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