2008 Joint Annual Meeting (5-9 Oct. 2008): Nitrogen Mineralization and Immobilization: New Thoughts on Old Themes.
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749-11 Nitrogen Mineralization and Immobilization: New Thoughts on Old Themes.



Wednesday, 8 October 2008
George R. Brown Convention Center, Exhibit Hall E
David D. Myrold, Crop & Soil Science, Oregon State University, 3017 ALS Building, Corvallis, OR 97331 and Peter J. Bottomley, Oregon State University, Dept. of Crop & Soil Science, 3017 Agricultural and Life Science Building, Corvallis, OR 97331-7306
The previous 25 years of research on N mineralization and immobilization, much of it using 15N, has altered our conceptual understanding of these opposing processes. Some paradigm shifts include: a more central role for DON, including the microbially produced enzymes that are key to its formation; the role of soil fauna in turning over the soil microbial biomass and stimulating N mineralization; and the importance of soil heterogeneity in regulating NH4+ production and consumption. We anticipate that the next refinement will likely be the incorporation of microbial community composition as a factor in N mineralization and immobilization processes.
See more of: Nitrogen in Agricultural Systems - Monograph (Posters)
See more of: S04 Soil Fertility & Plant Nutrition