Yield-scaled global warming potential of two irrigation management systems in a highly productive rice system

Tarlera, Silvana; Capurro, M. C.; Irisarri, Pilar; Scavino, Ana Fernández; Cantou, Guillermina; Roel, A.

doi:10.1590/0103-9016-2015-0050

Cited by 43 publications

(39 citation statements)

References 32 publications

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“…The authors explained that a positive GHGI value is indicative of a net source of CO 2 equivalent per kg of yield whilst a negative value indicates a net sink of GHG to the soil. GWPY studies have been conducted for rice cultivation systems and other arable cropping systems in various countries [17][18][19][20], but literature on such studies in Ghana and African rice cultivation systems is rare. For Ghana, the lack of adequate investments in the agricultural sector and the high percentage of smallholders who still employ rudimentary farming practices make it imperative for efficient farming systems which encourage optimal use of inputs to be developed.…”

Section: Yield-scaled Global Warming Potential (Greenhouse Gas Intensmentioning

confidence: 99%

“…Tarlera et al [19] also studied how water management impacts both CH 4 and N 2 O emissions from rice paddies under two irrigation systems viz conventional water management (continuous flooding) and an alternative system (controlled deficit irrigation allowing for wetting and drying, AWDI). The results of the study showed that the AWDI system emitted 55% less CH 4 emissions compared to the continuous flooding system.…”

Section: Water Management and Research Effortsmentioning

confidence: 99%

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Rice Cultivation and Greenhouse Gas Emissions: A Review and Conceptual Framework with Reference to Ghana

2017

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Abstract:Rice is an essential crop in Ghana. Several aspects of rice have been studied to increase its production; however, the environmental aspects, including impact on climate change, have not been studied well. There is therefore a gap in knowledge, and hence the need for continuous research. By accessing academic portals, such as Springer Open, InTech Open, Elsevier, and the Kwame Nkrumah University of Science and Technology's offline campus library, 61 academic publications including peer reviewed journals, books, working papers, reports, etc. were critically reviewed. It was found that there is a lack of data on how paddy rice production systems affect greenhouse gas (GHG) emissions, particularly emissions estimation, geographical location, and crops. Regarding GHG emission estimation, the review identified the use of emission factors calibrated using temperate conditions which do not suit tropical conditions. On location, most research on rice GHG emissions have been carried out in Asia with little input from Africa. In regard to crops, there is paucity of in-situ emissions data from paddy fields in Ghana. Drawing on the review, a conceptual framework is developed using Ghana as reference point to guide the discussion on fertilizer application, water management rice cultivars, and soil for future development of adaptation strategies for rice emission reduction.

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Section: Yield-scaled Global Warming Potential (Greenhouse Gas Intensmentioning

confidence: 99%

Section: Water Management and Research Effortsmentioning

confidence: 99%

Rice Cultivation and Greenhouse Gas Emissions: A Review and Conceptual Framework with Reference to Ghana

2017

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“…Previous studies found that AWD reduced water input and kept rice grain yield at normal level (or even increased) because of the enhancement in root growth, grain-filling rate, and remobilization of carbon reserves from vegetative tissues to grains (Yang et al 2007;Zhang et al 2008). Furthermore, while CH 4 emission was reduced by 40-70%, AWD could increase N0 2 emissions from paddy fields in the world (e.g., Wassmann et al 2000;Farooq et al 2009;Pandey et al 2014;Tarlera et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Impacts of alternate wetting and drying on greenhouse gas emission from paddy field in Central Vietnam

Tran

Hoang

Tokida

et al. 2017

Soil Science and Plant Nutrition

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Vietnam is the world's fifth largest rice producing country. Since methane (CH 4 ), a potent greenhouse gas (GHG), emission from the rice cultivation accounts for 14.6% of the national anthropogenic GHG emission, developing and disseminating mitigation options are the urgent need. Alternate wetting and drying (AWD) is the irrigation technique, in which a paddy field encompasses several soil-drying phases during the growth period, thereby reducing the CH 4 emission. However, field trials of the AWD's feasibility in Central Vietnam are limited so far. We therefore carried out a 3-year experiment in a farmer's field both in winter-spring season and summer-autumn season. CH 4 and nitrous oxide (N 2 O) emissions were compared among the three treatments of water management: continuous flooding (CF), AWD, and site-specific AWD (AWDS) that changed the degree of soil drying depending on the growth stage. The total water use including irrigation and rainfall was significantly (p < 0.05) reduced by AWD (by 15%) and AWDS (by 14%) compared to CF, but rice grain yield did not differ among the three treatments. The seasonal cumulative CH 4 emission was significantly reduced by AWD (26%) and AWDS (26%) compared to CF, whereas the seasonal cumulative N 2 O emission did not differ among treatments. The resultant global warming potentials (GWPs) of CH 4 and N 2 O under AWD and AWDS were 26% and 29% smaller than that under CF, respectively. The GWP of N 2 O was only 0.8% of the total GWP of CH 4 + N 2 O. The yield-scaled GWP and water productivity (i.e., the ratio of grain yield to water use) were also improved by AWD and AWDS. No significant differences in the measured items between AWD and AWDS were attributed to similar variation patterns in the surface water level. The results confirm the AWD's performance as a mitigation option for paddy GHG emission in Central Vietnam. ARTICLE HISTORY

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“…In particular, the mean rice yields on the CF30 plots were 11,171, 10,387, and 9803 kg per ha, during each of three crop seasons, while the mean seasonal yields on the AWDI plots were 10,170, 8700, and 8992 kg per ha, respectively [194]. The reductions in the mean yields are statistically significant in years two and three.…”

Section: Intermittent Drainage Vs Continuous Floodingmentioning

confidence: 89%

“…In a three-year experiment conducted in southeastern Uruguay, with an indica rice cultivar, Tarlera et al [194] compared the methane and nitrous oxide emissions on rice fields that were flooded continuously from 30 days after emergence (CF30), with fields that were irrigated intermittently from 30 days after emergence through 70 days after emergence (AWDI). The second set of fields was then flooded continuously for the remainder of the season.…”

Section: Intermittent Drainage Vs Continuous Floodingmentioning

confidence: 99%

Managing Water and Soils to Achieve Adaptation and Reduce Methane Emissions and Arsenic Contamination in Asian Rice Production

Wichelns

2016

Water

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Rice production is susceptible to damage from the changes in temperature and rainfall patterns, and in the frequency of major storm events that will accompany climate change. Deltaic areas, in which millions of farmers cultivate from one to three crops of rice per year, are susceptible also to the impacts of a rising sea level, submergence during major storm events, and saline intrusion into groundwater and surface water resources. In this paper, I review the current state of knowledge regarding the potential impacts of climate change on rice production and I describe adaptation measures that involve soil and water management. In many areas, farmers will need to modify crop choices, crop calendars, and soil and water management practices as they adapt to climate change. Adaptation measures at the local, regional, and international levels also will be helpful in moderating the potential impacts of climate change on aggregate rice production and on household food security in many countries. Some of the changes in soil and water management and other production practices that will be implemented in response to climate change also will reduce methane generation and release from rice fields. Some of the measures also will reduce the uptake of arsenic in rice plants, thus addressing an important public health issue in portions of South and Southeast Asia. Where feasible, replacing continuously flooded rice production with some form of aerobic rice production, will contribute to achieving adaptation objectives, while also reducing global warming potential and minimizing the risk of negative health impacts due to consumption of arsenic contaminated rice.

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Yield-scaled global warming potential of two irrigation management systems in a highly productive rice system

Cited by 43 publications

References 32 publications

Rice Cultivation and Greenhouse Gas Emissions: A Review and Conceptual Framework with Reference to Ghana

Rice Cultivation and Greenhouse Gas Emissions: A Review and Conceptual Framework with Reference to Ghana

Impacts of alternate wetting and drying on greenhouse gas emission from paddy field in Central Vietnam

Managing Water and Soils to Achieve Adaptation and Reduce Methane Emissions and Arsenic Contamination in Asian Rice Production

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