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Published in Soil Sci Soc Am J 50:457-462 (1986)
© 1986 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Incorporation of 35S-sulfate Into Inorganic and Organic Constituents of Two Forest Soils1

S. C. Schindler, M. J. Mitchell, T. J. Scott, R. D. Fuller and C. T. Driscoll2

ABSTRACT

Incorporation of 35S-sulfate into phosphate-extractable S, hydriodic acid-reducible S (HI-S), and total S was measured in three horizons of Spodosols from the Huntington Forest, New York and Hubbard Brook Experimental Forest, New Hampshire. After 56 d 35S incorporated into nonwater-extractable S constituents was 92, 65, 92, 63, 72, and 91% of the total 35S-activity for the Huntington Forest Oa, Bh, Bsl, and Hubbard Brook Oa, Bh, and Bsl horizons, respectively. Immobilization of 35S-sulfate into carbon-bonded S (total S — HI-S) was the major incorporation pathway in the Oa horizons. Adsorption of 35S-sulfate (phosphate-extractable) was most evident in the Bh and Bsl horizons. Incorporation of 35S-sulfate into ester sulfate (HI-S — inorganic S) occurred in all horizons. The influence of immobilization-mineralization and adsorption-desorption on S dynamics of these forest soils was evaluated.

NOTES

1 This research was supported by McIntire-Stennis and the National Science Foundation.

2 Research Assistant, Professor, Research Assistant, College of Environmental Science and Forestry, SUNY, Syracuse, NY 13210, and Research Associate, Associate Professor, Syracuse University, Syracuse, NY 13210, respectively.

Received for publication March 8, 1985.




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and Life Sciences Education		 Vadose Zone Journal
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Environmental Quality		 The Plant Genome
Copyright © 1986 by the Soil Science Society of America.