Effects of water management on greenhouse gas emissions from farmers' rice fields in Bangladesh

Islam, Saidul; Gaihre, Yam Kanta; Islam, Md. Rafiqul; Akter, Mahmuda; Mahmud, Abdullah Al; Singh, Upendra; Sander, Bjoern Ole

doi:10.1016/j.scitotenv.2020.139382

Cited by 82 publications

(94 citation statements)

References 29 publications

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“…3). These findings corroborate earlier findings (Ku et al, 2017;Islam et al, 2020). When AWD irrigation is managed correctly, significant reductions in CH4 emissions are anticipated.…”

Section: Impact Of Irrigation Methods On the Emission Of Ghgs And The...supporting

confidence: 90%

“…The topsoil layer becomes aerobic throughout a drying cycle, while the bottom soil layer stays anaerobic even when the water level reaches 15 cm below the soil surface. Thus, large amounts of N2O are generated because of microbial nitrification of NH4 + and denitrification of NO3 - (Islam et al, 2020). While N2O generation declines at very high moisture levels, it rises in fields with repeated wet and dry spells (Brentrup et al, 2000).…”

Section: Impact Of Irrigation Methods On the Emission Of Ghgs And The...mentioning

confidence: 99%

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Farmers’ Participatory Evaluation of Alternate Wetting and Drying Irrigation Method on the Greenhouse Gas Emission, Water Productivity and Paddy Yield in Bangladesh

Hossain¹,

Islam²

2022

Preprint

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In dry season paddy farming, the alternate wetting and drying (AWD) irrigation improves water productivity, paddy production, and has the potential to decrease greenhouse gas (GHG) such as methane (CH4) and nitrous oxide (N2O) emissions when compared to continuous flooding (CF). However, there is a lack of research in Bangladesh on the effects of water management on CH4 and N2O emissions. During November 2017–April 2018, participatory on-farm trials were conducted at Feni and Chattogram districts of Bangladesh. Total 105 farmers comprising 20-hectare of land (62 farmers at Feni and 43 farmers at Chattogram district, each location having 10 hectare of land). We compared irrigation water and cost reductions, paddy yield, and CH4 and N2O emissions from paddy fields irrigated using AWD and CF irrigation methods. The CH4 and N2O emissions were determined using the Cool Farm Beta-3 methodology, and the global warming potential (GWP) was estimated using the Intergovernmental Panel on Climate Change-2014 standard approach. The mean results of randomly selected 30 farmers from two locations (15 of each) showed that AWD remarkably decreased irrigation water consumption by about 24% and increased water productivity by 224%. We estimated 23% savings for irrigation costs in AWD. By this time, AWD improved paddy production by 3% over CF. The AWD irrigation resulted in a 47% reduction in cumulative CH4 emissions having a lower CH4 emission factor (0.74 kg ha-1 day-1) than CF (1.39 kg ha-1 day-1). There was no obvious difference in N2O emission between AWD and CF. When compared to CF, AWD decreased the overall GWP by 27% and lowered the GHG intensity by 42%. The CH4 and N2O emissions did not differ substantially between Feni and Chattogram.

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“…3). These findings corroborate earlier findings (Ku et al, 2017;Islam et al, 2020). When AWD irrigation is managed correctly, significant reductions in CH4 emissions are anticipated.…”

Section: Impact Of Irrigation Methods On the Emission Of Ghgs And The...supporting

confidence: 90%

Section: Impact Of Irrigation Methods On the Emission Of Ghgs And The...mentioning

confidence: 99%

Farmers’ Participatory Evaluation of Alternate Wetting and Drying Irrigation Method on the Greenhouse Gas Emission, Water Productivity and Paddy Yield in Bangladesh

Hossain¹,

Islam²

2022

Preprint

View full text Add to dashboard Cite

show abstract

“…(2014) found overall grain yield with SRI to be 49% higher than with CP, with yield enhanced at every N application. Other studies have also reported an increase in rice grain yields under SRI practices relative to CP Islam et al. (2020) ; Sato and Uphoff (2007) .…”

Section: Resultsmentioning

confidence: 86%

Lowering nitrogen rates under the system of rice intensification enhanced rice productivity and nitrogen use efficiency in irrigated lowland rice

Mboyerwa

Kibret

Mtakwa

et al. 2022

Heliyon

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“…Thakur et al (2014) found that overall, grain yield by SRI was 49% higher than with CP, with the yield enhanced by every N application dose. Qin et al (2010), Ye et al (2013), andIslam et al (2020) observed an increase in rice yields under SRI practices. Sato and Uphoff (2007) summarized the results of 12,133 comparison trials covering 9,429 ha and found that average yield increase was 78% (3.3 t/ha) in SRI compared to conventional practice.…”

Section: Discussionmentioning

confidence: 89%

Rice Yield and Nitrogen Use Efficiency With System of Rice Intensification and Conventional Management Practices in Mkindo Irrigation Scheme, Tanzania

Mboyerwa

Kibret

Mtakwa

et al. 2022

Front. Sustain. Food Syst.

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AimThis study investigated the impacts of system of rice intensification (SRI) and conventional management practice (CP) on rice growth, grain yield, and nitrogen use efficiency by nitrogen application.MethodsField experiments were conducted in wet and dry seasons; each season, the experiment was set in a split-plot randomized complete block design in triplicate with crop management practices in main plots and nitrogen levels in subplots.ResultsThe average grain yield by SRI was 7.1 and 6.7 t ha−1, while by CP it was 6.1 and 4.4 t ha−1in the wet and dry seasons, respectively. The grain yield of the SRI practice was significantly (p < 0.05) greater than that of the conventional practice (CP) at all levels of nitrogen application. The average yield under the treatment interaction of SRI and nitrogen levels were increased by 13.1% in the wet season and 35.8 % in the dry season. Roots of SRI plants had significantly (p < 0.05) greater fresh weight, length, and volume as indicated by increased root dry weight per hill. SRI improved crop growth, effective tillers, filled grains per panicle, grain filling rate, panicle weight, spikelet per panicle, straw yield, and 1,000-grain weight. Nitrogen application rate had a significant effect (p < 0.05) on agronomic nitrogen use efficiency (ANUE). As the N application rate was increased beyond 90 kg N ha−1, the ANUE and partial factor productivity (PFP) under both SRI and CP were significantly decreased in both seasons.ConclusionOverall, the SRI production system with 60 kg N ha−1 improved rice growth, yield, and nitrogen use efficiency compared to the CP.

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Effects of water management on greenhouse gas emissions from farmers' rice fields in Bangladesh

Cited by 82 publications

References 29 publications

Farmers’ Participatory Evaluation of Alternate Wetting and Drying Irrigation Method on the Greenhouse Gas Emission, Water Productivity and Paddy Yield in Bangladesh

Farmers’ Participatory Evaluation of Alternate Wetting and Drying Irrigation Method on the Greenhouse Gas Emission, Water Productivity and Paddy Yield in Bangladesh

Lowering nitrogen rates under the system of rice intensification enhanced rice productivity and nitrogen use efficiency in irrigated lowland rice

Rice Yield and Nitrogen Use Efficiency With System of Rice Intensification and Conventional Management Practices in Mkindo Irrigation Scheme, Tanzania

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