Methane and nitrous oxide emissions from irrigated lowland rice paddies after wheat straw application and midseason aeration

Li, Xianglan; Ma, Jing; Yao, Yunjun; Liang, Shunlin; Zhang, Guangbin; Xu, Hong‐Guang; Yagi, Kazuyuki

doi:10.1007/s10705-014-9627-8

Cited by 41 publications

(40 citation statements)

References 49 publications

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“…To our current knowledge, several researchers worked on mitigation of GHGs through different water management strategies like flooded and dry/wet intermittent irrigation (Li et al, 2014;Pandey et al, 2014;Zhou et al, 2014) and changing the timing of midseason drainage Itoh et al, 2011) but due to lack of a fixed criteria for re-watering the plots under different soil and climatic conditions, these methods often result in over irrigation or under irrigation. Yang et al (2007) concluded that soil water potential (SWP) can be used as an irrigation index under different types of soil and climatic conditions as it is rapidly and instantaneously determined by installing tensiometers.…”

Section: Introductionmentioning

confidence: 99%

Greenhouse gas emission from direct seeded paddy fields under different soil water potentials in Eastern India

Kumar

Nayak

Mohanty

et al. 2016

Agriculture, Ecosystems & Environment

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Section: Introductionmentioning

confidence: 99%

Greenhouse gas emission from direct seeded paddy fields under different soil water potentials in Eastern India

Kumar

Nayak

Mohanty

et al. 2016

Agriculture, Ecosystems & Environment

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“…Despite this concern, however, increases in N 2 O emissions were much smaller than the decreases in CH 4 ; therefore, the net 100-year global warming potentials (GWP) of CH 4 and N 2 O emissions with the prolonged MD were lower than those with the conventional MD. However, decreases in rice yields due to prolonged MD were observed at many study sites (Itoh et al 2011;Li et al 2014). After observing that prolonged MD did not always result in yield reductions, Itoh et al (2011) proposed changing fertilization or water management strategies after MD.…”

Section: Discussionmentioning

confidence: 99%

“…These values are almost identical to China. In China, MD is conducted by approximately 80 % of farmers and the duration is between 7 (Xu et al 2007) and 10 (Li et al 2014) days. The present study shows that MD implementation varies among regions in Japan.…”

Section: Current Water Management Practicesmentioning

confidence: 99%

“…Accordingly, the total CH 4 emissions from rice fields with rice straw application, summing CH 4 emissions from continuously flooded and MD areas, may be reduced by 12.7 % (from 187.3 to 163.5 Gg-CH 4 ). Prolonged MD is more effective than conventional MD for reducing CH 4 emissions (Itoh et al 2011;Li et al 2014;Minamikawa et al 2014). These results indicate that further reductions in CH 4 emissions could be expected by increasing MD duration where MD is commonly practiced and rice straw is incorporated (Zhang et al 2011;Leon et al 2012), which in turn contributes to the world's efforts in climate change mitigation.…”

Section: Possible Changes In Ch 4 Emission Estimatesmentioning

confidence: 99%

“…Methane emissions from intermittently drained plots are lower than those from continuously flooded plots (Yagi et al 1996;Itoh et al 2011). Therefore, prolonged MD is more effective than conventional MD for reducing CH 4 emissions, according to the degree of soil drainage (Itoh et al 2011;Li et al 2014;Minamikawa et al 2014).…”

Section: Introductionmentioning

confidence: 99%

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The effects of current water management practices on methane emissions in Japanese rice cultivation

Leon

Kohyama

Yagi

et al. 2015

Mitig Adapt Strateg Glob Change

Self Cite

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Cultivated wetland rice fields are a source of methane (CH 4 ) emissions. To estimate CH 4 emissions and develop policies to reduce such emissions, information on water management at the farm level is crucial. It is known that farmers implement midseason drainage (MD) to increase rice yields and save water. However, little is known about whether MD is carried out in soils where CH 4 emissions are high and how part-time status will influence management. The objective of this study is to identify factors that determine MD implementation using a binomial logistic regression model based on a farm-level survey in Japan and to indicate possible changes in estimates of CH 4 emissions, accounting for current water management practices. The implementation rates were significantly higher where the soil types were classified as having the potential for high CH 4 emissions. Under current water management practices, the duration of MD and the percentage of continuous flooding were 5 to 7 days longer and approximately 7 % higher, respectively, than the values used by the Greenhouse Gas Inventory Office of Japan, which in turn are used to report greenhouse gas emissions to the United Nations Framework Convention on Climate Change. By accounting for current water conditions with the Tier 2 method, this study indicates that national estimates of CH 4 emissions from rice straw application areas could be lowered by 12.7 %. These results may contribute to the development of a mitigation policy that will help to further reduce CH 4 emissions.

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Nitrous oxide emissions from rice paddy: Impacts of rice straw and water management

Rassaei

2023

Env Prog and Sustain Energy

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Typically, organic amendment additions like rice straw (RS) are used in agriculture to improve soil quality. The application of RS may influence the production of methane and nitrous oxide (N 2 O), which may increase the amount of accessible nutrients and organic matter (OM). When compared to farmers' practices of continuous flooding irrigation (CFI), water management (WM) techniques like alternative wetness and dryness irrigation (AWDI) in paddy rice cultivation boost water use efficiency and may result in lower greenhouse gas (GHGs) emissions. A randomized complete block design (RCBD) was employed to evaluate the impacts of WM (CFI and AWDI), RS (15.0 and 30.0 ton ha À1 ), and their interaction (RS*WM) on the N 2 O emission and rice yield in a rice paddy calcareous soil. In comparison to control, a single application of RS at 15.0 and 30.0 ton ha À1 significantly reduced N 2 O emissions by 16.20% and 31.40% (p < 0.01). AWDI regime increased N 2 O emissions by 67.0% in comparison to the CFI regime (p < 0.01). According to two tailed Pearson correlation, the correlations between AWDI and N 2 O emissions in the days following rice planting were significantly positive at 0.01 levels. In AWDI regime, adding RS significantly reduced N 2 O emissions by 18.68% and 31.55% in 15.0 and 30.0 ton ha À1 added RS, respectively, compared to solo WM treatments (p < 0.01). Both RS rates resulted in a considerable increase in biomass and rice grain while AWDI had no significant effect on them. Our study shows that AWDI saved 18.50% water in comparison with CFI regime.

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Methane and nitrous oxide emissions from irrigated lowland rice paddies after wheat straw application and midseason aeration

Cited by 41 publications

References 49 publications

Greenhouse gas emission from direct seeded paddy fields under different soil water potentials in Eastern India

Greenhouse gas emission from direct seeded paddy fields under different soil water potentials in Eastern India

The effects of current water management practices on methane emissions in Japanese rice cultivation

Nitrous oxide emissions from rice paddy: Impacts of rice straw and water management

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