Seasonal variations of CH4 and N2O emissions in response to water management of paddy fields located in Southeast China

Hou, Haijun; Peng, Shizhang; Xu, Junzeng; Sung-Bum, Yang; Mao, Zhu

doi:10.1016/j.chemosphere.2012.04.066

Cited by 157 publications

(92 citation statements)

References 34 publications

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“…The lower flux on 20 May might be attributable to the slow soil moisture depletion rate during this period (Hou et al, 2012). The diurnal variations of N2O emissions on 22 April, 6 May, and 20 May showed a bimodal curve, but the peak time of emergence was not fixed.…”

Section: Air Temperaturementioning

confidence: 97%

“…The diurnal variations of N2O emissions on 22 April, 6 May, and 20 May showed a bimodal curve, but the peak time of emergence was not fixed. The peaks sometimes appeared at 12:00 h and sometimes at 14:00, 16:00, and 20:00 h. Results indicated that the peak time of N2O emissions mostly depends on variations in soil moisture and changes in temperature (Hou et al, 2012;Trost et al, 2015). Fluxes in the evening or early morning were generally lower than during the day with small peaks usually at 03:00 h, which were still lower than in the daytime.…”

Section: Air Temperaturementioning

confidence: 99%

“…Four gas samples were collected from each chamber for 30 min at 10-min intervals at each sampling time. The N2O concentrations were analyzed with a gas chromatography system (Agilent 7890A, Agilent Technologies, Santa Clara, California, USA) with an electron capture detector (ECD), and N2O fluxes were calculated in accordance with the linear N2O concentration increase rate within the chamber (Hou et al, 2012). All samples cannot be analyzed within 48 h, the time usually considered as the best analysis period by the gas chromatography (GC) system, so two of the three sample replicates were analyzed; the third replicate was analyzed only when the results of the previous two samples exhibited large variations.…”

Section: Gas Sampling and Measurementsmentioning

confidence: 99%

“…In addition, diurnal variation patterns and magnitude of N2O emissions from soils were mainly dominated by soil moisture content and temperature levels (Metivier et al, 2009;Tian et al, 2012;Hou et al, 2012;Kennedy et al, 2013;Wang et al, 2015;Prasad et al, 2015). All the above-mentioned studies investigated the diurnal variation of N2O emissions from soils with uniform moisture distribution (Du et al, 2006;Scheer et al, 2008), and few studies have examined the diurnal patterns of N2O emissions from soils with non-uniform moisture distribution.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Diurnal pattern of nitrous oxide emissions from soils under different vertical moisture distribution conditions

Sung-Bum

et al. 2016

Chilean J. Agric. Res.

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Section: Air Temperaturementioning

confidence: 97%

Section: Air Temperaturementioning

confidence: 99%

Section: Gas Sampling and Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Diurnal pattern of nitrous oxide emissions from soils under different vertical moisture distribution conditions

Sung-Bum

et al. 2016

Chilean J. Agric. Res.

Self Cite

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“…Paddy field, in particular, has been identified as one of the major sources of atmospheric CH 4 and N 2 O. The periodic waterlogging-drainage alteration episodes and intensive fertilizer inputs in paddy field could provide suitable soil environment and accessible substrate for CH 4 and N 2 O emissions (Hou et al 2012;Yao et al 2012). While paddy soils release substantial amounts of CH 4 and N 2 O to the atmosphere, the changes in agriculture land use could have potentials for mitigating net global warming potential by decreasing CH 4 and/or N 2 O emissions (Weller et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Effects of land use conversion and fertilization on CH4 and N2O fluxes from typical hilly red soil

Liu

et al. 2016

Environ Sci Pollut Res

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Land use conversion and fertilization have been widely reported to be important managements affecting the exchanges of greenhouse gases between soil and atmosphere. For comprehensive assessment of methane (CH 4 ) and nitrous oxide (N 2 O) fluxes from hilly red soil induced by land use conversion and fertilization, a 14-month continuous field measurement was conducted on the newly converted citrus orchard plots with fertilization (OF) and without fertilization (ONF) and the conventional paddy plots with fertilization (PF) and without fertilization (PNF). Our results showed that land use conversion from paddy to orchard reduced the CH 4 fluxes at the expense of increasing the N 2 O fluxes. Furthermore, fertilization significantly decreased the CH 4 fluxes from paddy soils in the second stage after conversion, but it failed to affect the CH 4 fluxes from orchard soils, whereas fertilizer applied to orchard and paddy increased soil N 2 O emissions by 68 and 113.9 %, respectively. Thus, cumulative CH 4 emissions from the OF were 100 % lower, and N 2 O emissions were 421 % higher than those from the PF. Although cumulative N 2 O emissions were stimulated in the newly converted orchard, the strong reduction of CH 4 led to lower global warming potentials (GWPs) as compared to the paddy. Besides, fertilization in orchard increased GWPs but decreased GWPs of paddy soils. In addition, measurement of soil moisture, temperature, dissolved carbon contents (DOCs), and ammonia (NH 4 + -N) and nitrate (NO 3 − -N) contents indicated a significant variation in soil properties and contributed to variations in soil CH 4 and N 2 O fluxes. Results of this study suggest that land use conversion from paddy to orchard would benefit for reconciling greenhouse gas mitigation and citrus orchard cultivation would be a better agricultural system in the hilly red soils in terms of greenhouse gas emission. Moreover, selected fertilizer rate applied to paddy would lead to lower GWPs of CH 4 and N 2 O. Nevertheless, more field measurements from newly converted orchard are highly needed to gain an insight into national and global accounting of CH 4 and N 2 O emissions.

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Satellite‐derived methane emissions from inundation in Bangladesh

2017

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The uncertainty in methane (CH4) source strength of rice fields and wetlands is particularly high in South Asia CH4 budgets. We used satellite observations of CH4 column mixing ratios from Atmospheric Infrared Sounder (AIRS), Scanning Imaging Absorption Spectrometer for Atmospheric Chartography (SCIAMACHY), and Greenhouse Gases Observing Satellite (GOSAT) to estimate the contribution of Bangladesh emissions to atmospheric CH4 concentrations. Using satellite‐derived inundation area as a proxy for source area, we developed a simple inverse advection model that estimates average annual CH4 surface fluxes to be 4, 9, and 19 mg CH4 m−2 h−1 in AIRS, SCIAMACHY, and GOSAT, respectively. Despite this variability, our flux estimates varied over a significantly narrower range than reported values for CH4 surface fluxes from a survey of 32 studies reporting ground‐based observations between 0 and 260 mg CH4 m−2 h−1. Upscaling our satellite‐derived surface flux estimates, we estimated total annual CH4 emissions for Bangladesh to be 1.3 ± 3.2, 1.8 ± 2.0, 3.1 ± 1.6 Tg yr−1, depending on the satellite. Our estimates of total emissions are in line with the median of total emission values for Bangladesh reported in earlier studies.

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Seasonal variations of CH4 and N2O emissions in response to water management of paddy fields located in Southeast China

Cited by 157 publications

References 34 publications

Diurnal pattern of nitrous oxide emissions from soils under different vertical moisture distribution conditions

Diurnal pattern of nitrous oxide emissions from soils under different vertical moisture distribution conditions

Effects of land use conversion and fertilization on CH4 and N2O fluxes from typical hilly red soil

Satellite‐derived methane emissions from inundation in Bangladesh

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