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| Titel |
Nitrous oxide emissions from maize–wheat field during 4 successive years in the North China Plain |
| VerfasserIn |
Y. Zhang, Y. Mu, Y. Zhou, J. Liu, C. Zhang |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 11, no. 7 ; Nr. 11, no. 7 (2014-04-01), S.1717-1726 |
| Datensatznummer |
250117336
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| Publikation (Nr.) |
 copernicus.org/bg-11-1717-2014.pdf |
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| Zusammenfassung |
| Agricultural soil with fertilization is a main anthropogenic source for
atmospheric nitrous oxide (N2O). N2O fluxes from a maize–wheat
rotation field in the North China Plain (NCP) were investigated for 4
successive years using the static chamber method. The annual N2O fluxes
from the control (without fertilization) and fertilization plots were
1.5 ± 0.2 and 9.4 ± 1.7 kg N ha−1 yr−1 in 2008–2009,
2.0 ± 0.01 and 4.0 ± 0.03 kg N ha−1 yr−1 in 2009–2010,
1.3 ± 0.02 and 5.0 ± 0.3 kg N ha−1 yr−1 in 2010–2011,
and 2.7 ± 0.6 and 12.5 ± 0.1 kg N ha−1 yr−1 in 2011–2012,
respectively. Annual direct emission factors (EFd's) in the
corresponding years were 2.4 ± 0.5%, 0.60 ± 0.01%,
1.1 ± 0.09% and 2.9 ± 0.2%, respectively. Significant linear
correlation between fertilized-induced N2O emissions (Y,
kg N ha−1) during the periods of 10 days after fertilization
and rainfall intensities from 4 days before to 10 days after fertilization
(X, mm) in the 4 years was found as Y = 0.048X − 1.1 (N = 4, R2 = 0.99,
P < 0.05). Therefore, the remarkable interannual variations of N2O
emissions and the EFd's were mainly ascribed to the rainfall. |
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