SSSAJ Grow Your Career with SSSA
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published in Soil Sci Soc Am J 36:51-54 (1972)
© 1972 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Sommers, L. E.
Right arrow Articles by Syers, J. K.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Sommers, L. E.
Right arrow Articles by Syers, J. K.
GeoRef
Right arrow GeoRef Citation
Agricola
Right arrow Articles by Sommers, L. E.
Right arrow Articles by Syers, J. K.

Fractionation of Organic Phosphorus in Lake Sediments1

L. E. Sommers, R. F. Harris, J. D. H. Williams, D. E. Armstrong and J. K. Syers2

ABSTRACT

The organic phosphorus of 10 Wisconsin lake sediments of diverse properties was fractionated on the basis of extractability and anion exchange properties. The fractionation procedure involved sequential extraction of the sediments with 1N HCl for 1 hour (HCl-Po), cold 0.3N NaOH for 16 hours (Cold NaOH-Po), and hot 0.3N NaOH for 8 hours (hot NaOH-Po) followed by anion exchange chromatography of the NaOH extracts into three fractions: fraction I, the 0.3N NaOH eluate, contained organic P that was not retained by the resin; fraction II, the 0.5M LiCl eluate, contained organic P with exchange properties similar to inorganic orthophosphate and monophosphate esters; fraction III, the 1M LiCl + 0.2N HCl eluate, contained organic P comparable to polyphosphate esters in exchange properties.

Total organic P extracted by the fractionation method was comparable to that removed by the standard Mehta et al. extractants indicating that the fractionation method provided valid total organic P data as well as information on the forms of organic P present in sediments.

HCl-Po constituted 6 to 17%, cold NaOH-Po 60 to 80%, and hot NaOH-Po 10 to 30% of the total organic P of the sediments. Anion exchange chromatography of the NaOH extracts showed that most of the organic P (48 to 80%) was present in fraction I, the fraction likely composed of high molecular weight humic-fulvic complexes. Fraction II contained 14 to 36% and fraction III less than 10% of the organic P in the NaOH extracts. Total inositol penta- and hexa-phosphates comprised less than 10% of the total organic P of the sediments. The total and major fractions of sediment organic P were related to organic C, total N and oxalate-extractable Al, but were not related consistently to any other sediment property or to the trophic level of the lake.

NOTES

1 Research supported by the College of Agricultural & Life Sciences and the Engineering Exp. Sta., University of Wisconsin, Madison, and by Federal Water Quality Administration Project no. WQ-014700-01 administered through the University of Wisconsin Water Resources Center. Presented in part before Div. S-2, S-3, and S-4, Soil Science Society of America, Tucson, Arizona, August 1970.

2 Formerly Graduate Research Assistant, currently Assistant Professor, Agronomy Department, Purdue Univ., Lafayette, Ind.; Associate Professor of Soils, Visiting Assistant Professor of Soils, Assistant Professor of Water Chemistry, and Associate Professor of Soils, respectively.

Received for publication July 2, 1971. Accepted for publication July 2, 1971.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Crop Science
Vadose Zone Journal Journal of Plant Registrations
Journal of Natural Resources
and Life Sciences Education		 Journal of
Environmental Quality
Copyright © 1972 by the Soil Science Society of America.