Nitrous oxide emissions from an annual crop rotation on poorly drained soil on the Canadian Prairies
Glenn, AJ; Tenuta, M; Amiro, BD; Maas, SE; Wagner-Riddle, C
| HERO ID | 1542370 |
|---|---|
| In Press | No |
| Year | 2012 |
| Title | Nitrous oxide emissions from an annual crop rotation on poorly drained soil on the Canadian Prairies |
| Authors | Glenn, AJ; Tenuta, M; Amiro, BD; Maas, SE; Wagner-Riddle, C |
| Journal | Agricultural and Forest Meteorology |
| Volume | 166 |
| Page Numbers | 41-49 |
| Abstract | Agricultural soils are a significant anthropogenic source of nitrous oxide (N2O) to the atmosphere. Despite likely having large emissions of N2O, there are no continuous multi-year studies of emissions from poorly drained floodplain soil. In the present study, the micrometeorological flux of N2O (E-N) was measured over three years (2006-2008) in a maize (Zea mays L.)/faba (Vicia faba minor L.)/spring-wheat (Triticum aestivum L) rotation in the Red River Valley, Manitoba, Canada on a gleyed humic verticol soil. Comparison of newly established reduced and intensive tillage treatments showed no difference in F-N within the constraints of the high variability between duplicate plots. The annual gap-filled Sigma F-N across tillage treatments was 5.5, 1.4, and 4.3 kg N ha(-1) in the maize, faba, and spring-wheat crop years, respectively. Emissions from fertilizer N addition and soil thaw the following spring was responsible for the greater Sigma F-N in the maize and spring-wheat years. Using four approaches to approximate background Sigma F-N resulted in estimates of 3.5-3.8% and 1.4-1.8% of applied fertilizer N emitted as N2O for the maize and spring-wheat crops, respectively. The CO2 global warming potential equivalent of Sigma F-N over the three study years was an emission of 5.4 Mg CO2-equiv. ha(-1) which adds to the previously determined C balance emission of 11.6 Mg CO2-equiv. ha(-1). (c) 2012 Elsevier B.V. All rights reserved. |
| Doi | 10.1016/j.agrformet.2012.06.015 |
| Wosid | WOS:000313479100006 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Source: Web of Science WOS:000313479100006 |
| Is Public | Yes |
| Keyword | Budget; Flux-gradient; Greenhouse gas; Nitrogen fertilizer; Nitrous oxide; Thaw |