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| DOI: | 10.1016/S0038-0717(03)00202-5 |
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| Web URL(s): | http://www.sciencedirect.com/science/article/pii/S0038071703002025
Last checked: 05/23/2014
Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Toor, Gurpal S.;
Condron, Leo M.;
Di, Hong J.;
Cameron, Keith C.;
Cade-Menun, Barbara J. |
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| Author Affiliation: | Toor: Department of Plant and Soil Sciences, University of Delaware, Newark, DE; Condron, Di, and Cameron: Centre for Soil and Environmental Quality, Lincoln University, Canterbury, New Zealand; Cade-Menun: Geological and Environmental Sciences, Stanford University, CA |
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| Title: | Characterization of organic phosphorus in leachate from a grassland soil |
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| Source: | Soil Biology & Biochemistry. Vol. 35, No. 10, October 2003, p. 1317-1323. |
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| Publishing Information: | Amsterdam, The Netherlands: Elsevier |
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| # of Pages: | 7 |
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| Keywords: | TIC Keywords: Chemical properties of soil; Effluent water; Esters; Eutrophication; Grassland soils; Hydrolysis; Leachates; Leaching; Nuclear magnetic resonance spectroscopy; Organophosphorus compounds; Phosphate losses; Phosphodiesterase; Phosphorus
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| Abstract/Contents: | "The degree of eutrophication in fresh water ecosystems may be influenced by the forms of phosphorus (P) leached from agricultural systems. Physico-chemical fractionation of P in leachate from a grassland soil carried out over a two year period indicated that the majority of the P loss from the Lismore soil occurred in unreactive particulate (55-76%) P forms. 31P nuclear magnetic resonance analysis of a selected leachate sample indicated that unreactive P was mainly comprised of monoester and diester forms of organic P. The presence of phosphomonoesterase (20-200 μg p nitrophenol l-1 h-1) and phosphodiesterase (68 μg bis-p nitrophenol l-1 h-1) activity in leachate resulted in hydrolysis of 10-21% of total unreactive P (TUP), indicating that some of the monoesters and diesters can be eventually hydrolyzed into inorganic P forms during P transport. Enzyme hydrolysis showed that 23% of the TUP was present as labile monoester P (LMP), followed by 20% as inositol hexakisphosphate (IHP) and 14% as diesters (phospholipids and nucleic acids). The findings of this study suggest that LMP, IHP and diesters are an important component of organic P leaching from the grassland soil." |
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| Language: | English |
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| References: | 47 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Toor, G. S., L. M. Condron, H. J. Di, K. C. Cameron, and B. J. Cade-Menun. 2003. Characterization of organic phosphorus in leachate from a grassland soil. Soil Biol. Biochem. 35(10):p. 1317-1323. |
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| DOI: 10.1016/S0038-0717(03)00202-5 |
| Web URL(s):
http://www.sciencedirect.com/science/article/pii/S0038071703002025
Last checked: 05/23/2014
Access conditions: Item is within a limited-access website |
| 
MSU catalog number: b2217194 |
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