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- Title
Relationship between nitrous oxide emission and winter wheat production.
- Authors
Shutao Chen; Yao Huang; Jianwen Zou
- Abstract
Abstract  A 3-year field study in southeast China was performed to examine the relationship between N2O emission and winter wheat production. Over the 2002â03, 2003â04 and 2004â05 wheat-cropping seasons, N2O emissions depended on nitrogen addition, plowing practice, and preceding crop type treatments, and showed a pronounced inter-annual variation. N2OâN emission factor, the proportion of fertilizer N released as N2OâN from the wheat field, varied from 1.33% to 2.97%. The relationship between N2O emission (y) and crop yield (x) was well explained by the function yâ=â3.773Ln(x)ââ1.46. Similarly, the function yâ=â4.445Ln(x)âââ3.52 can be employed to address the relationship between N2O emission (y) and above ground biomass (x). About 84% and 87% of variation in seasonal N2O emission were explained by the two functions, while only 66% of the variation was represented by the N input with a linear relationship. The results of this study suggest that seasonal N2O emission of soil under winter wheat could be better predicted by crop yield and biomass than by N input.
- Subjects
NITROUS oxide; WINTER wheat; CROP yields; SOIL productivity
- Publication
Biology & Fertility of Soils, 2008, Vol 44, Issue 7, p985
- ISSN
0178-2762
- Publication type
Article
- DOI
10.1007/s00374-008-0284-4