Conversion of winter flooded rice paddy planting to rice-wheat rotation decreased methane emissions during the rice-growing seasons

Xu, Peng; Zhou, Wei; Jiang, Mengdie; Shaaban, Muhammad; Zhou, Minghua; Zhu, Bo; Ren, Xueli; Jiang, Yanbin; Hu, Ronggui

doi:10.1016/j.still.2019.104490

Cited by 19 publications

(5 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Network analysis showed that the soil under RF had the largest number of lines, indicating that the interaction between methanogens in soils in both RW and DR was weaker than that in RF (Figure 7, Table S2 in Supporting Information ). The reason might be that the anaerobic condition in flooded soil under RF is conducive to maintaining methanogenic activities and the growth of methanogens (Xu et al., 2020; G. B. Zhang et al., 2017). The methanogenic population could increase in flooded soil under RF (Bhullar et al., 2013; Pavlostathis & Giraldo, 1991); thus, constructing a more complex microbial network.…”

Section: Discussionmentioning

confidence: 99%

“…China has a large rice planting area with a wide distribution and diverse cropping modes, mainly including the three cropping modes of Rice‐Wheat (RW), Rice‐Fallow (RF), and Double‐Rice (DR). The adoption of different cropping modes with different water and fertilization management practices, for example, water drainage, soil tillage, and straw returning, etc., which probably affect CH 4 production and emission (Gu et al., 2022; He et al., 2022; Xu et al., 2020; G. B. Zhang et al., 2017). The paddies under RF mode are mainly distributed in mountainous areas of Southwest China, which are flooded all year round, resulting in far higher CH 4 emissions compared to other paddy fields (Cai et al., 2000; Mei et al., 1998).…”

Section: Introductionmentioning

confidence: 99%

“…China has a large rice planting area with a wide distribution and diverse cropping modes, mainly including the three cropping modes of Rice-Wheat (RW), Rice-Fallow (RF), and Double-Rice (DR). The adoption of different cropping modes with different water and fertilization management practices, for example, water drainage, soil tillage, and straw returning, etc., which probably affect CH 4 production and emission (Gu et al, 2022;He et al, 2022;Xu et al, 2020;G. B. Zhang et al, 2017).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Differences in Methanogenic Pathways and Communities in Paddy Soils Under Three Typical Cropping Modes

Shen,

Ji,

Huang

et al. 2023

JGR Biogeosciences

View full text Add to dashboard Cite

The methane (CH4) production process in paddy fields varies depending on different cropping modes. However, there is limited knowledge on the changes in anaerobically produced CH4 isotopic ratios (δ13CH4), the methanogenic pathways, and the dominant communities of methanogens in paddy soils under different modes. To address this, we conducted experiments using anaerobic incubation methods, stable carbon isotope fractionation through inhibition studies with fluoromethane, and high‐throughput sequencing. These methods allowed us to measure the CH4 production potential (MPP), the relative contribution of acetoclastic methanogenesis to CH4 production (fac), and the composition of the methanogen community in paddy soils under three typical cropping modes: Rice‐Wheat (RW), Rice‐Fallow (RF), and Double‐Rice (DR) in China. The results showed that MPP was 30.7 μg CH4 g−1 d−1 in DR soil, around 57% and 66% higher than that in RW and RF soils, respectively, possibly due to the lower pH, clay content, and higher abundance of the mcrA gene. Moreover, RF soil had the highest value of produced δ13CH4 (−43.9‰) but the lowest value of produced δ13CO2 (−26.3‰). Based on the carbon isotope fractionation associated with methanogenesis via H2/CO2 reduction (1.049–1.062), the values of fac estimated in the RF soil (80%–98%) were much higher than that in the RW (39%–60%) and DR soils (52%–75%). This could be supported by the finding showing that Methanosarcina, the acetoclastic methanogens, were dominant in RF soil, while Methanosarcina and Methanobacterium (the hydrogenotrophic methanogens) dominated in RW and DR soils. Redundancy analysis revealed that the community structure of methanogens was significantly affected by soil pH. The findings suggest that differences in the abundance and composition of methanogens, possibly driven by soil pH, play a key role in regulating methanogenesis in the paddy soils, and further provide valuable insights into the process of CH4 production in different cropping modes.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Differences in Methanogenic Pathways and Communities in Paddy Soils Under Three Typical Cropping Modes

Shen,

Ji,

Huang

et al. 2023

JGR Biogeosciences

View full text Add to dashboard Cite

show abstract

“…7, Table S2). The reason might be due to the anaerobic environment conducive to the retention of methanogens activities and the growth of methanogens in flooded RF soil (Xu et al, 2020;Zhang et al, 2017). The methanogens population could increase in flooded RF soil (Bhullar et al, 2013;Pavlostathis and Giraldo, 1991), thus forming a more complex microbial network.…”

Section: Effect On Methanogenic Communitiesmentioning

confidence: 99%

Differences in methanogenic pathways and methanogenic communities in paddy soils under three typical cropping modes

Shen

Huang

et al. 2023

Preprint

View full text Add to dashboard Cite

Microbial methane (CH4) production varies among different cropping modes,which has important implications for how to reduce CH4 emissions from paddy fields.However,little is known about the values of anaerobically produced δ13CH4,methanogenic pathways,and their dominant communities in different paddy soils.Through anaerobic incubation experiments and the stable carbon isotope with fluoromethane inhibitor method,CH4 production potential (MPP), the relative contribution of acetoclastic methanogenesis(fac),and the abundance and community composition of methanogens in paddy soils were measured under three typical cropping modes (Rice-Wheat,RW;Rice-Fallow,RF;Double-Rice,DR) in China. The results showed that MPP was 30.7 μg CH4 g–1 d–1 in DR soil,57% and 66% higher than that in RW and RF soils,respectively,possibly due to the lower pH and higher abundance of mcrA genes. Moreover,RF soil had the highest produced δ13CH4 value(–43.9‰) and the lowest produced δ13CO2 value(–26.3‰). Based on the carbon isotope fractionations associated with H2/CO2-dependent methanogenesis(1.049–1.062), the values of fac estimated in RF soil(80–98%)were much higher than that in RW(39–60%) and DR(52–75%) soils. It might be supported by that the Methanosarcina (acetoclastic methanogens) were dominant in RF soil while Methanosarcina and Methanobacterium(hydrogenotrophic methanogens) dominated in RW and DR soils. Redundancy analysis revealed that the community structure of methanogens was significantly affected by soil pH,indicating that the differences in methanogenic pathways under the three typical cropping modes might be caused by the changes in community composition driven by soil pH. The findings suggest that soil pH-induced methanogenic abundance and community composition drive paddy MPP and methanogenic pathways, which would provide important insights into the CH4 reduction in paddies.

show abstract

“…However, the use of CWs for sewage treatment may increase CH 4 discharge and lead to “pollution exchange”, so researchers have taken great interest in managing CWs and flooded rice fields to minimize CH 4 emissions (Pangala et al 2010 ). At this stage, a large number of studies have focused on various factors (e.g., irrigation, seasonality, fertilization and crop rotation) affecting CH 4 emission in paddy wetlands and found that the average CH 4 emission fluxes reached approximately 25–300 Tg/year (Wang et al 2018 ; Xu et al 2020 ). GHGs from wetlands are mainly affected by anaerobic microorganisms in the bottom layer of wetlands, and methanogenic bacteria have easy access to root cellulose for their own needs, resulting in large amounts of CH 4 production (Liu et al 2017 ; Zhang et al 2021b ).…”

Section: Introductionmentioning

confidence: 99%

Effects of bioelectricity generation processes on methane emission and bacterial community in wetland and carbon fate analysis

Liu

Xue

Wang

et al. 2022

Bioresour. Bioprocess.

View full text Add to dashboard Cite

Wetlands are an important carbon sink for greenhouse gases (GHGs), and embedding microbial fuel cell (MFC) into constructed wetland (CW) has become a new technology to control methane (CH4) emission. Rhizosphere anode CW–MFC was constructed by selecting rhizome-type wetland plants with strong hypoxia tolerance, which could provide photosynthetic organics as alternative fuel. Compared with non-planted system, CH4 emission flux and power output from the planted CW–MFC increased by approximately 0.48 ± 0.02 mg/(m2·h) and 1.07 W/m3, respectively. The CH4 emission flux of the CW–MFC operated under open-circuit condition was approximately 0.46 ± 0.02 mg/(m2·h) higher than that under closed-circuit condition. The results indicated that plants contributed to the CH4 emission from the CW–MFC, especially under open-circuit mode conditions. The CH4 emission from the CW–MFC was proportional to external resistance, and it increased by 0.67 ± 0.01 mg/(m2·h) when the external resistance was adjusted from 100 to 1000 Ω. High throughput sequencing further showed that there was a competitive relationship between electrogenic bacteria and methanogens. The flora abundance of electrogenic bacteria was high, while methanogens mainly consisted of Methanothrix, Methanobacterium and Methanolinea. The form and content of element C were analysed from solid phase, liquid phase and gas phase. It was found that a large amount of carbon source (TC = 254.70 mg/L) was consumed mostly through microbial migration and conversion, and carbon storage and GHGs emission accounted for 60.38% and 35.80%, respectively. In conclusion, carbon transformation in the CW–MFC can be properly regulated via competition of microorganisms driven by environmental factors, which provides a new direction and idea for the control of CH4 emission from wetlands. Graphical Abstract

show abstract

Conversion of winter flooded rice paddy planting to rice-wheat rotation decreased methane emissions during the rice-growing seasons

Cited by 19 publications

References 43 publications

Differences in Methanogenic Pathways and Communities in Paddy Soils Under Three Typical Cropping Modes

Differences in Methanogenic Pathways and Communities in Paddy Soils Under Three Typical Cropping Modes

Differences in methanogenic pathways and methanogenic communities in paddy soils under three typical cropping modes

Effects of bioelectricity generation processes on methane emission and bacterial community in wetland and carbon fate analysis

Contact Info

Product

Resources

About