586-8 Comparison of Crop Growth on the Mineralization of Rhizosphere Soil Sulfur.

Poster Number 502

See more from this Division: S04 Soil Fertility & Plant Nutrition
See more from this Session: Sulfur, Selenium, and Germanium (Posters)

Monday, 6 October 2008
George R. Brown Convention Center, Exhibit Hall E

Terrence Gardner and Zachary Senwo, Natural Resources and Environmental Sciences, Alabama A&M University, Normal, AL
Abstract:
The effect of plant growth on the mineralization and distribution of soil sulfur (S) fractions in the rhizosphere of organically managed crop plots was studied. Significant differences of sulfur fractions between the rhizosphere and non-rhizosphere were determined in dependent of crop type. This study was conducted to quantify and compare the mineralization of S in soil samples taken from the rhizosphere of selected vegetative crop species and non- rhizosphere soil samples. Air dried soils were packed in Erlenmeyer flasks and incubated at 30oC for 1, 2, 3 and 4 weeks. Each sample was shaken with 5 mM CaCl2 extracting solution to remove the mineral S and filtered.  The samples were analyzed for SO2-4 - S. The amount of SO2-4 extracted from the 52 soil samples was quantified, to determine whether soils from the rhizosphere of the selected vegetative crop types have marked effects on the mineralizable S pool. These findings invariably may show that the mineralization of organic sulfur is related to specific crop types. Final analysis and conclusive results will be presented.
Keyword: sulfur mineralization; rhizosphere

See more from this Division: S04 Soil Fertility & Plant Nutrition
See more from this Session: Sulfur, Selenium, and Germanium (Posters)