Relationship between nitrous oxide emission and winter wheat production
Relationship between nitrous oxide emission and winter wheat production
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DOI：
10.1007/s00374-008-0284-4
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发表时间：
2008-04
影响因子：
6.5
通讯作者：
Shutao Chen;Yao Huang;Jianwen Zou
中科院分区：
文献类型：
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作者：
Shutao Chen;Yao Huang;Jianwen Zou
在中国东南部进行了为期3年的田间试验，研究了N2O排放与冬小麦产量的关系。在2002-03、2003-04和2004-05三个小麦种植季节，N2O排放量取决于氮素添加、耕作措施和之前的作物类型处理，并表现出明显的年际变化。N_2O-N排放因子为1.33%~2.97%。N2O排放量(Y)与作物产量(X)之间的关系可用函数y= 3.773Ln(X) + 1.46很好地解释。同样，函数y= 4.445Ln(X) − 3.52可以用来描述N2O排放量(Y)和地上生物量(X)之间的关系。约84%和87%的季节N2O排放变化可以用这两个函数来解释，而只有66%的变化可以用线性关系的N输入来表示。本研究结果表明，作物产量和生物量能较好地预测冬小麦土壤N2O的季节排放。
A 3-year field study in southeast China was performed to examine the relationship between N2O emission and winter wheat production. Over the 2002–03, 2003–04 and 2004–05 wheat-cropping seasons, N2O emissions depended on nitrogen addition, plowing practice, and preceding crop type treatments, and showed a pronounced inter-annual variation. N2O–N emission factor, the proportion of fertilizer N released as N2O–N 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 functiony= 3.773Ln(x) + 1.46. Similarly, the functiony= 4.445Ln(x) − 3.52 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.