Effect of Sulfur Source on Sulfur Oxidation

摘要: The rate of elemental sulfur (So) oxidation in soils may be affected by the source So. This study was conducted to determine effect So on oxidation. Liquid culture studies with Thiobacillus thiooxidans and T. thioparus, laboratory incubations a Holloman soil (loamy, gypsic, thermic, shallow Typic Torriorthent) Belen (clayey over loamy, montmorillonitic [calcareous], thermic Torrifluvent), field were conducted. Periodic measurements included pH as measure H2SO4, electrical conductivity (EC) dissolution CaCO3 from H2SO4 production, available Fe, Zn, P, SO4 at end experiments So-oxidation effects nutrient availability. sources pure (Sp), Wettable S (Sw), flowable (Sf), Disper-Sul (Sd). In liquid culture, Sw, Sf, Sd inhibited or slowed oxidation, compared Sp, suggesting an ingredient commercial responsible for inhibition. Oxidation similar Sp field. Results indicate that is not cause slow some New Mexico soils. Chemoautotrophic oxidizers present unamended their numbers increased So-amended Although amendment (25 g kg−1) decreased approximately 0.5 unit tenfold, did increase P. failure levels are attributed buffering capacity calcareous