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Frontiers of Agriculture in China

ISSN 1673-7334

ISSN 1673-744X(Online)

CN 11-5729/S

Front. Agric. China    2007, Vol. 1 Issue (1) : 37-42     DOI: 10.1007/s11703-007-0006-y
Research article |
Effects of nitrogen application and maize growth on N2O emission from soil
Lanfang YANG1,Zucong CAI2
1 School of Resource and Environmental Science, Hubei University, Wuhan 430062, China, E-mail: lfyang@hubu.edu.cn
2 State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
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Abstract

Using the pot experiment and closed static chamber-gas chromatography (GC) technique, this paper studied the effects of nitrogen application (150 and 300 mg/kg soil) and maize growth on N2O emission from soil. In maize-planted soil, the N2O emission rate increased with increasing N application rate, its peak appeared at the seedling stage, and there was no significant correlation between N2O emission rate and air temperature. Contrarily, in exposed soil, the peak of N2O emission rate occurred at the later stages of the experiment, and there was a significant exponential correlation between soil N2O emission rate and air temperature, in which Q10 (the value of soil N2O emission rate responding to temperature) was 4.4 and 3.2 in high and low N applications. The total amount of N2O emission increased remarkably with increased N application rate in both planted and un-planted soils. N2O emission inventory from exposed and maize-planted soils in high N application was 2.5 and 1.6 times as high as that in low N application, respectively. In the same N application rate, N2O emission inventory in high and low N application from exposed soil was 12 and 7.5 times as high as that from maize-planted soil, respectively. As compared with exposed soil, maize growth reduced N2O emission by 92%and 87%, respectively, at high and low N application rates. In summary, maize growth and nitrogen application not only affected the seasonal variation and magnitude of N2O emission from soil, but also altered the relationship between air temperature and soil N2O emission.

Keywords maize growth      N2O emission from soil      nitrogen application      temperature     
Issue Date: 22 February 2016
 Cite this article:   
Lanfang YANG,Zucong CAI. Effects of nitrogen application and maize growth on N2O emission from soil[J]. Front. Agric. China, 2007, 1(1): 37-42.
 URL:  
http://academic.hep.com.cn/fag/EN/10.1007/s11703-007-0006-y
http://academic.hep.com.cn/fag/EN/Y2007/V1/I1/37
Fig. 1  Seasonal variation of N2O emission rate from maize-planted soil

HNM: High N application; LNM: Low N application

Fig. 2  Seasonal variation of N2O emission from exposed soil and air temperature during maize growing period

HNB: High N application to exposed soil; LNB: Low N application to exposed soil; Tair: Air temperature

Treatment N2O emission rate/ (μg·kg-1 · d-1) Total/(μg · kg-1)
BES ES-TS TS-FS FS-RS
HNM 2.54P0.36b 0.57P0.09c 0.32P0.02b 0.62P0.10c 95.8P4.0c
LNM 1.36P0.17c 0.64P0.13c 0.25P0.02b 0.51P0.07c 64.8P8.8d
HNB 3.86P0.77a 6.66P1.33a 5.73P4.51a 26.46P3.14a 1150P125a
LNB 1.71P0.46b 3.58P1.46b 3.69P0.79a 10.18P1.03b 485P50b
Table 1  N2O emission from soil at different growth stages and total emission during maize growth
Fig. 3  Correlation of N2O emission rate from the exposed soil with air temperature

HNB and LNB denote high and low N application to the exposed soil, respectively.

Fig. 4  Correlation of N2O emission rate from maize-planted soil with air temperature

HNM and LNM denote high and low N application to maize-planted soil.

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