Nitrous oxide emissions from grazed grassland as affected by a nitrification inhibitor,dicyandiamide, and relationships with ammonia-oxidizing bacteria and archaea |
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| Authors: | Hong J Di Keith C Cameron Rob R Sherlock Ju-Pei Shen Ji-Zheng He Chis S Winefield |
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| Institution: | (1) Centre for Soil and Environmental Research, Lincoln University, P.O. Box 84, Lincoln, 7647, Christchurch, New Zealand;(2) Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing, 100085, People’s Republic of China;(3) Faculty of Agriculture and Life Sciences, Lincoln University, P.O. Box 84, Lincoln, 7647, Christchurch, New Zealand |
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| Abstract: | Purpose Nitrous oxide (N2O) is a potent greenhouse gas and, in grazed grassland systems where animals graze outdoor pastures, most of the N2O is emitted from animal urine nitrogen (N) deposited during grazing. Recently, ammonia-oxidizing archaea (AOA) were found
to be present in large numbers in soils as well in the ocean, suggesting a potentially important role for AOA, in addition
to ammonia-oxidizing bacteria (AOB), in the nitrogen cycle. The relationship between N2O emissions and AOB and AOA populations is unknown. The objective of this study was to determine the quantitative relationship
between N2O emissions and AOB and AOA populations in nitrogen-rich grassland soils. |
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