A 3‐year field measurement of methane and nitrous oxide emissions from rice paddies in China: Effects of water regime, crop residue, and fertilizer application

Zou, Jianwen; Huang, Yao; Jiang, Jingyan; Zheng, Xunhua; Sass, Ronald L.

doi:10.1029/2004gb002401

Cited by 642 publications

(534 citation statements)

References 63 publications

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“…Meanwhile, soil water content was usually considered to be another important regulator of CH 4 fluxes or uptakes (Zou et al 2005;Wang et al 2015). Sustainable water logging would favor the existence of methanogens and led to more CH 4 fluxes (Zou et al 2005), which is also supported by our results (Figs. 1b and 3b).…”

Section: Dependence Of Soil Ch 4 and N 2 O On Soil Propertiessupporting

confidence: 87%

“…While in orchard fields, soil DOC contents decreased due to the improved soil aeration and increased mineralization activity (Weller et al 2016). Thus, our result confirmed that higher CH 4 fluxes were observed from paddy soils where DOC contents were higher (Zou et al 2005;Yao et al 2012). Studies also showed that the higher level of DOC contents may have enhanced C availability thus controlled N 2 O emissions through its influence on nitrify and denitrifying activity (Burger et al 2005).…”

Section: Effects Of Land Use Conversion On Soil Ch 4 and N 2 O Fluxessupporting

confidence: 81%

“…The higher mineral N contents, which was increased by fertilization, provide more substrates for nitrication and denitrification and thus stimulated soil N 2 O fluxes. Meanwhile, previous studies also stated that soil DOC contents could control soil N 2 O emissions by influencing microbial growth and biological decomposition (Zou et al 2005). In our present study, higher soil DOC contents and mineral N contents together predicated more N 2 O emissions from fertilized treatment compared to the unfertilized treatment (Table 4).…”

Section: Effects Of Fertilization On Soil Ch 4 and N 2 O Fluxessupporting

confidence: 63%

“…According to the former literature and results obtained in our study, we argued that soil conditions induced by land use conversion might be the main controlling factors influencing soil CH 4 and N 2 O emissions, which should be highly verified in subsequent studies. Meanwhile, higher soil labile organic substrates (especially DOC) were generally found to increase CH 4 production because they could provide substrates for methanogens (Zou et al 2005;Hu et al 2016). In the present study, based on the agricultural practices, some crop residue was typically retained in paddy fields, which led to high level of soil DOC concentration throughout the observing period (Table 2).…”

Section: Effects Of Land Use Conversion On Soil Ch 4 and N 2 O Fluxesmentioning

confidence: 57%

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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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Section: Dependence Of Soil Ch 4 and N 2 O On Soil Propertiessupporting

confidence: 87%

Section: Effects Of Land Use Conversion On Soil Ch 4 and N 2 O Fluxessupporting

confidence: 81%

Section: Effects Of Fertilization On Soil Ch 4 and N 2 O Fluxessupporting

confidence: 63%

Section: Effects Of Land Use Conversion On Soil Ch 4 and N 2 O Fluxesmentioning

confidence: 57%

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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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“…However, incorporation of straw also increases CH 4 production and emissions (Denier Van Der Gon and Neue 1995;Zou et al 2005). Several incubation studies have shown a highly dynamic structure of methanogenic archaeal communities during straw decomposition, with members responding differently to organic residue type, incubation temperature, and duration of incubation (Conrad and Klose 2006;Peng et al 2008;Conrad et al 2012;Lu et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Effect of nitrogen fertilizer and/or rice straw amendment on methanogenic archaeal communities and methane production from a rice paddy soil

Bao

Huang

Wang

et al. 2016

Appl Microbiol Biotechnol

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Nitrogen fertilization and returning straw to paddy soil are important factors that regulate CH 4 production. To evaluate the effect of rice straw and/or nitrate amendment on methanogens, a paddy soil was anaerobically incubated for 40 days. The results indicated that while straw addition increased CH 4 production and the abundances of mcrA genes and their transcripts, nitrate amendment showed inhibitory effects on them. The terminal restriction fragment length polymorphism (T-RFLP) analysis based on mcrA gene revealed that straw addition obviously changed methanogenic community structure. Based on mcrA gene level, straw-alone addition stimulated Methanosarcinaceaes at the early stage of incubation (first 11 days), but nitrate showed inhibitory effect. The relative abundance of Methanobacteriaceae was also stimulated by straw addition during the first 11 days. Furthermore, Methanosaetaceae were enriched by nitrate-alone addition after 11 days, while Methanocellaceae were enriched by nitrate addition especially within the first 5 days. The transcriptional methanogenic community indicated more dynamic and complicated responses to straw and/or nitrate addition. Based on mcrA transcript level, nitrate addition alone resulted in the increase of Methanocellaceae and the shift from Methanosarcinaceae to Methanosaetaceae during the first 5 days of incubation. Straw treatments increased the relative abundance of Methanobacteriaceae after 11 days. These results demonstrate that nitrate addition influences methanogens which are transcriptionally and functionally active and can alleviate CH 4 production associated with straw amendment in paddy soil incubations, presumably through competition for common substrates between nitrate-utilizing organisms and methanogens.

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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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A 3‐year field measurement of methane and nitrous oxide emissions from rice paddies in China: Effects of water regime, crop residue, and fertilizer application

Cited by 642 publications

References 63 publications

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

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

Effect of nitrogen fertilizer and/or rice straw amendment on methanogenic archaeal communities and methane production from a rice paddy soil

Satellite‐derived methane emissions from inundation in Bangladesh

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