Response of CH4 and N2O Emissions and Wheat Yields to Tillage Method Changes in the North China Plain

Abstract. Agricultural soil with fertilization is a main anthropogenic source for atmospheric N2O. N2O fluxes from a maize-wheat field in the North China Plain (NCP) were investigated for four successive years using static chamber method. The annual N2O fluxes from 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 ± 0.3kg 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. Fertilizer-induced emission factors (EFs) in the corresponding years were 2.4, 0.60, 1.1 and 2.9%, respectively. Significant linear correlation between fertilized-induced N2O emission (Y, kg N ha−1 yr−1) and rainfall 4 day before and 10 days after fertilization (X, mm) was found as Y = 0.04767X − 1.06453 (N = 4, R2 = 0.99241, P = 0.00253). Therefore, the remarkable interannual variations of N2O emissions and the EFs from the agricultural field were mainly ascribed to the rainfall. The total N2O emission from the agricultural field in the NCP was estimated to be 144 Gg N yr−1 based on the average flux derived from the measurements of four years, and the fertilizer-induced N2O emission accounted for about 76% (110 Gg N yr−1) of total emission.

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NO and N2O emissions from agricultural fields in the North China Plain: Origination and mitigation

The Science of The Total Environment ◽

10.1016/j.scitotenv.2016.01.209 ◽

2016 ◽

Vol 551-552 ◽

pp. 197-204 ◽

Cited By ~ 23

Author(s):

Yuanyuan Zhang ◽

Yujing Mu ◽

Yizhen Zhou ◽

Di Tian ◽

Junfeng Liu ◽

...

Keyword(s):

North China Plain ◽

North China ◽

Agricultural Fields ◽

N2o Emissions ◽

The North ◽

The North China Plain

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Nitrous oxide emissions from maize–wheat field during 4 successive years in the North China Plain

Biogeosciences ◽

10.5194/bg-11-1717-2014 ◽

2014 ◽

Vol 11 (7) ◽

pp. 1717-1726 ◽

Cited By ~ 20

Author(s):

Y. Zhang ◽

Y. Mu ◽

Y. Zhou ◽

J. Liu ◽

C. Zhang

Keyword(s):

Nitrous Oxide ◽

North China Plain ◽

North China ◽

Nitrous Oxide Emissions ◽

Anthropogenic Source ◽

N2o Emissions ◽

Wheat Field ◽

The North ◽

The North China Plain ◽

N2o Fluxes

Abstract. 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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