372 Nitrification: New Players and Environmental Drivers: I

Oral Session
SSSA Division: Soil Biology & Biochemistry
The role of ammonia oxidizing bacteria in mediating the first and rate limiting step of nitrification has been known for many decades while the role of ammonia oxidizing archaea is a recent discovery. In this session the impact of various environmental factors on functional and niche differentiations of the two groups of organisms will be presented and discussed.

Approved for 2.5 SW CEUs.

Wednesday, November 18, 2015: 11:00 AM-2:30 PM
Minneapolis Convention Center, 103 BC

Mussie Y. Habteselassie
Mussie Y. Habteselassie
11:00 AM
Introductory Remarks
11:05 AM
Nitrification in Agricultural Soils Under Contrasting N Management.
Jeanette M. Norton, Utah State University; Yang Ouyang, Utah State University; Marlen C Rice, Utah State University
11:25 AM
Prospects for Putting "Biological Brakes" on Nitrification.
Mary Ann V. Bruns, Pennsylvania State University
12:05 PM
Uncoupling of Ammonia Oxidation from Nitrite Oxidation, and Its Impact upon Nitrous Oxide Production in a Grassland Soil.
Andrew T. Giguere, Oregon State University; Anne E. Taylor, Oregon State University; David D. Myrold, Oregon State University; Peter J. Bottomley, Oregon State University
12:25 PM
Lunch Break
1:25 PM
Effects of Saline Soil Amelioration on Soil Nitrification.
Heather L Dose, USDA-ARS; Thomas M. DeSutter, North Dakota State University; Ann-Marie Fortuna, North Dakota State University; David E. Clay, South Dakota State University
1:40 PM
The Effect of Ammonical N Fertilizer Concentration on Nitrification and N2O Production in Different Soils.
Xia Zhu-Barker, University of California-Davis; Martin Burger, University of California-Davis; William R. Horwath, University of California-Davis
1:55 PM
Differential Responses of Ammonia Oxidizers in a Pasture Land with a History of Poultry Litter Application.
Abha Mundepi, University of Georgia - Griffin; Mussie Y. Habteselassie, University of Georgia - Griffin; Miguel L. Cabrera, University of Georgia-Athens
2:10 PM
Effect of Soil Moisture and Temperature on the Contribution of N2O Sources and Ammonia Oxidizer Growth in a Cropping Soil.
Rui Liu, Melbourne School of Land and Environment, The University of Melbourne; Deli Chen, The University of Melbourne; Helen Suter, University of Melbourne; Helen Hayden, Department of Economic Development, Jobs, Transport and Resources; Jizheng He, University of Melbourne
2:25 PM
Concluding Remarks
2:30 PM