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Environmental parameters regulating sulfur retention in a variety of forest soils

Thesis/Dissertation ·
OSTI ID:6154018
Field incubations utilizing /sup 35/S-labelled sulfate were conducted in a white pine and a hardwood forest. The A horizon soil formed approximately 3.0 nmol of organic S g/sup -1/ dry weight, which did not differ significantly from results obtained in similarly designed laboratory incubations. Total intrinsic S in this horizon contained substantial amounts of sulfonate S and ester sulfate, and organic /sup 35/S fractions in several linkage groups were found to predominate following field incubation. Capacities for sulfate adsorption, organic S formation and organic S mineralization were assayed for 01/02, A1, E2 and Bh horizons of a coastal pine forest. A1 horizon soil from various locations within New Mexico National Forests adsorbed 1.2 to 4.9 nmol g/sup -1/ of added sulfate and formed between 1.6 and 4.8 nmol g/sup -1/ of added sulfate and formed between 1.6 and 4.8 nmol g/sup -1/ of organic S during 48h. Methionine mineralization and the fate of both mineralization-derived and added sulfate were examined in hardwood forest soils which had been suction dried to contain between 2 and 80% moisture. Incubation of /sup 35/S-methionine with organic matter extracted from the 02 litter layer of a hardwood forest, resulted in the formation of /sup 35/S-methionine-labelled organic component.
Research Organization:
Georgia Univ., Athens (USA)
OSTI ID:
6154018
Country of Publication:
United States
Language:
English