TY - JOUR
T1 - Importance of organic and inorganic sulfur to mineralization processes in a forest soil
AU - David, M. B.
AU - Schindler, S. C.
AU - Mitchell, M. J.
AU - Strick, J. E.
N1 - Funding Information:
Acknowledgements-This work was supporteidn part by a Grant-in-Aid of Research from Sigma Xi, a McIntire Stennis grant, and the NSF. The comments of Dr J. W. B. Stewart on this manuscript were appreciated.
PY - 1983
Y1 - 1983
N2 - Sulfur mineralization rates, changes in organic and inorganic S constituents and arylsulfatase activity were determined in four soil horizons (O2, B21h, B22hir and B23) which represent the major portion of a forest Spodosol (Becket). Biweekly, for 20 weeks, soil subsamples were leached with deionized water and analyzed for S constituents. Rates of water-soluble sulfate release were 123, 39, 34 and 18 nmol S g-1 dry mass week-1 for O2, B22hir, B23 and B21h horizons, respectively. Only in the organic O2 horizon did non-sulfate inorganic S (Zn-HCl-S) increase (15 nmol S g-1) while phosphate extractable S decreased in all the mineral horizons (13, 19 and 28 nmol S g-1 week-1, B21h, B22hir and B23, respectively) due to desorption. Ester sulfate was mineralized in the B22hir and B23 horizons (-66 and -22 nmol S g-1 week-1) and increased in the O2 (174 nmol S g-1 week-1). Arylsulfatase activity varied among horizons and decreased with time. Carbon-bonded S decreased in all horizons, especially those with high respiration rates (i.e. O2 and B21h), but changes were not significant. Only the B22hir horizon exhibited a significant loss of total S (128 nmol S g-1 week-1). The interrelationships among inorganic and organic S dynamics were outlined.
AB - Sulfur mineralization rates, changes in organic and inorganic S constituents and arylsulfatase activity were determined in four soil horizons (O2, B21h, B22hir and B23) which represent the major portion of a forest Spodosol (Becket). Biweekly, for 20 weeks, soil subsamples were leached with deionized water and analyzed for S constituents. Rates of water-soluble sulfate release were 123, 39, 34 and 18 nmol S g-1 dry mass week-1 for O2, B22hir, B23 and B21h horizons, respectively. Only in the organic O2 horizon did non-sulfate inorganic S (Zn-HCl-S) increase (15 nmol S g-1) while phosphate extractable S decreased in all the mineral horizons (13, 19 and 28 nmol S g-1 week-1, B21h, B22hir and B23, respectively) due to desorption. Ester sulfate was mineralized in the B22hir and B23 horizons (-66 and -22 nmol S g-1 week-1) and increased in the O2 (174 nmol S g-1 week-1). Arylsulfatase activity varied among horizons and decreased with time. Carbon-bonded S decreased in all horizons, especially those with high respiration rates (i.e. O2 and B21h), but changes were not significant. Only the B22hir horizon exhibited a significant loss of total S (128 nmol S g-1 week-1). The interrelationships among inorganic and organic S dynamics were outlined.
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U2 - 10.1016/0038-0717(83)90031-7
DO - 10.1016/0038-0717(83)90031-7
M3 - Article
AN - SCOPUS:0020898017
SN - 0038-0717
VL - 15
SP - 671
EP - 677
JO - Soil Biology and Biochemistry
JF - Soil Biology and Biochemistry
IS - 6
ER -