Seasonal Methane and Nitrous Oxide Emissions of Several Rice Cultivars in Direct-Seeded Systems

Simmonds, Maegen; Anders, Merle M.; Adviento-Borbe, Maria Arlene; Kessel, Chris van; McClung, Anna M.; Linquist, Bruce A.

doi:10.2134/jeq2014.07.0286

Cited by 58 publications

(59 citation statements)

References 53 publications

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“…, and Simmonds et al [31], where emissions from CLXL745 were 56 kg CH 4 -C ha -1 season -1 and three pure-line cultivars averaged 75 kg CH 4 -C ha -1 season -1 , however, were consistent with the results of this study. Similar to area-scaled emissions, yield-scaled CH 4 emissions differed among cultivars (P < 0.001; Table 3).…”

Section: Seasonal Methane Emissionssupporting

confidence: 92%

“…Similarly, Simmonds et al [31] observed a reduction in CH 4 emissions from the hybrid CLXL745 relative to the pure-line cultivar, Francis, following heading, while no differences in emissions were observed prior to heading. Although examining cultivars not typically grown in the US, in China, Ma et al [29] observed reduced dissolved CH 4 concentrations in the rhizosphere of hybrid rice as well as a 67% increase in CH 4 oxidation potential relative to pure-line cultivars, while no differences in CH 4 production potential were observed.…”

mentioning

confidence: 78%

“…The 30% reduction in CH 4 emissions from hybrid rice cultivars relative to a pure-line cultivar in this study is consistent with previous studies where Smartt et al [32] and Rogers et al [30] observed reductions of 31 and 37%, respectively, from CLXL745 relative to two pure-line cultivars on a clay and silt-loam soil, respectively. Similarly, Simmonds et al [31] measured a 25% reduction from CLXL745 relative to pure-line cultivars in Arkansas, while no differences in CH 4 emissions between hybrid and pure-line cultivars were detected in California. The magnitude of CH 4 emissions measured in this study were 56 to 60% less than emissions measured from similar treatments by Rogers et al [30] on a similar soil.…”

Section: Seasonal Methane Emissionsmentioning

confidence: 89%

“…The studies conducted in Arkansas observed reductions in CH 4 emissions ranging from 25 to 37% from a japonica/indica hybrid cultivar relative to pure-line conventional cultivars [30,31,32], while Simmonds et al [31] measured no difference in CH 4 emissions from the same hybrid cultivar (CLXL745) and pure-line cultivars in California. Although limited data have been collected in the US, cultivar selection has been shown to significantly impact CH 4 emissions from rice.…”

Section: Introductionmentioning

confidence: 97%

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Methane Emissions among Hybrid Rice Cultivars in the MidSouthern United States

A.D.¹,

K.R.²,

R.J.³

2018

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Abstract. Rice (Oryza sativa L.) production systems have a greater global warming potential than upland row crops due to methane (CH4) emissions resulting from anaerobic conditions associated with flood-irrigated soils. Based on recent research indicating the potential for hybrid cultivars to mitigate CH4 emissions from rice, the objective of this study was to determine the influence of several commonly grown hybrid rice cultivars on CH4 fluxes and emissions from a silt-loam soil. Four cultivars were evaluated: the three hybrids CLXL729, CLXL745, and XL753 and the pure-line cultivar Roy J. Methane fluxes were determined by measuring changes in headspace CH4 concentrations over a period of 1 hour using 30-cm-inner-diameter polyvinyl chloride chambers. Only minor differences in CH4 fluxes occurred among the three hybrid cultivars, while the pure-line cultivar (Roy J) generally had greater (P < 0.05) fluxes. Peak CH4 fluxes occurred just after heading and were greater (P < 0.05) from Roy J (7.9 mg CH4-C m -2 h -1) than from the three hybrid cultivars, which did not differ and averaged 5.1 mg CH4-C m -2 h -1. Seasonal CH4 emissions were greater (P < 0.05) from Roy J (74.8 kg CH4-C ha -1 season -1 ) than from CLXL729, XL753, and CLXL745, which did not differ, and averaged 55.3, 53.0, and 48.9 kg CH4-C ha -1 season -1, respectively. Results of this study indicate the use of common hybrid cultivars may have potential for mitigation of CH4 emissions from rice production on silt-loam soils in the mid-southern United States.Keywords: Methane emissions, rice cultivar, hybrid rice, methane mitigation IntroductionRice (Oryza sativa L.) is the world's only major row crop that substantially contributes to global methane (CH 4 ) emissions. While most crops are grown under aerated soil conditions and act as net sinks for atmospheric CH 4 , the majority of rice throughout the globe is produced in flooded fields [1] and acts as a net source of CH 4 into the atmosphere. The anoxic conditions resulting from flooded soils lead to the production and release of CH 4 , a greenhouse gas with a global warming potential (GWP) 25 times stronger than carbon dioxide (CO 2 ) [2]. Due to the production of CH 4 , rice cultivation has been estimated to have a GWP 2.7 and 5.7 times stronger than the production of maize (Zea mays L.) and wheat (Triticum aestivum L.), respectively, with 90% of the GWP of rice systems attributed to CH 4 [3,4]. It has been estimated, on a global scale, that approximately half of all anthropogenic CH 4 emissions to the atmosphere are a direct result of agricultural activities [5,6] and that 22% of those agricultural CH 4 emissions occur due to rice cultivation [7]. Arkansas is the leading rice-producing state in the US, representing over 49% of harvested area in 2014 and resulting in an estimated 39% of total CH 4 emissions from rice cultivation in the US in 2014 [8].Methane emissions from a rice cultivation system are governed by the magnitude and balance between the two microbial processes of methanogenesis, the prod...

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Section: Seasonal Methane Emissionssupporting

confidence: 92%

mentioning

confidence: 78%

Section: Seasonal Methane Emissionsmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 97%

See 2 more Smart Citations

Methane Emissions among Hybrid Rice Cultivars in the MidSouthern United States

A.D.¹,

K.R.²,

R.J.³

2018

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“…Its cultivated area worldwide is 160 million hm 2 , and this accounts for 22.3% of the total crop planting area. The gross product of rice is 741 million t, and this accounts for up to 26.0% of global grain output [1] (FAO, 2017).…”

Section: Introductionmentioning

confidence: 99%

Review of precision rice hill-drop drilling technology and machine for paddy

Zhang

Wang

Luo

et al. 2018

International Journal of Agricultural and Biological Engineering

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Mechanized rice direct seeding is a cost-effective and efficient approach for rice cultivation. Recently, the use of rice direct seeding has been increasing rapidly owing to rural labour shortages and continuous increases in agricultural production costs. This article reviews the research and application progress of mechanized rice direct seeding including direct seeding technologies, precision rice seeding, precision rice seed-metering devices, key supporting agronomy technologies for mechanized rice direct seeding. South China Agricultural University developed precision rice hill-drop drilling (PRHDD) with synchronous furrowing and ridging technology and series machines for paddy that affords remarkable advantages in terms of saving time and labour, higher yield, and higher efficiency. In this approach, pre-germinated seeds are uniformly hill-dropped in the expected positions in puddled soil. It significantly improved the crop growth population and effectively solved the problems of high frequency of disease and pests caused by the irregular distribution of rice seeds with manual broadcasting, and generally reduces seed usage and increases the yield. Therefore, this technology has broad application prospects and great potential for promoting the development of mechanized rice direct seeding in China.

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Modeling methane and nitrous oxide emissions from direct‐seeded rice systems

Simmonds

Lee

et al. 2015

JGR Biogeosciences

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Process‐based modeling of CH4 and N2O emissions from rice fields is a practical tool for conducting greenhouse gas inventories and estimating mitigation potentials of alternative practices at the scale of management and policy making. However, the accuracy of these models in simulating CH4 and N2O emissions in direct‐seeded rice systems under various management practices remains a question. We empirically evaluated the denitrification‐decomposition model for estimating CH4 and N2O fluxes in California rice systems. Five and nine site‐year combinations were used for calibration and validation, respectively. The model was parameterized for two cultivars, M206 and Koshihikari, and able to simulate 30% and 78% of the variation in measured yields, respectively. Overall, modeled and observed seasonal CH4 emissions were similar (R2 = 0.85), but there was poor correspondence in fallow period CH4 emissions and in seasonal and fallow period N2O emissions. Furthermore, management effects on seasonal CH4 emissions were highly variable and not well represented by the model (0.2–465% absolute relative deviation). Specifically, simulated CH4 emissions were oversensitive to fertilizer N rate but lacked sensitivity to the type of seeding system (dry seeding versus water seeding) and prior fallow period straw management. Additionally, N2O emissions were oversensitive to fertilizer N rate and field drainage. Sensitivity analysis showed that CH4 emissions were highly sensitive to changes in the root to total plant biomass ratio, suggesting that it is a significant source of model uncertainty. These findings have implications for model‐directed field research that could improve model representation of paddy soils for application at larger spatial scales.

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Seasonal Methane and Nitrous Oxide Emissions of Several Rice Cultivars in Direct-Seeded Systems

Cited by 58 publications

References 53 publications

Methane Emissions among Hybrid Rice Cultivars in the MidSouthern United States

Methane Emissions among Hybrid Rice Cultivars in the MidSouthern United States

Review of precision rice hill-drop drilling technology and machine for paddy

Modeling methane and nitrous oxide emissions from direct‐seeded rice systems

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