Previous Crop and Cultivar Effects on Methane Emissions from Drill-Seeded, Delayed-Flood Rice Grown on a Clay Soil

Smartt, Alden D.; Brye, Kristofor R.; Rogers, Christopher W.; Norman, Richard; Gbur, Edward E.; Hardke, J. T.; Roberts, Trenton L.

doi:10.1155/2016/9542361

Cited by 36 publications

(46 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Gas sampling throughout the study occurred between 0800 and 1000 hours, similar to previous studies [30,32,48,49,51,52,53], in order to prevent excessive heating within the chambers during sampling. Gas samples for flux measurements occurred on approximately weekly intervals at 7,14,21,28,35,43,49,56,63,71, and 77 days after flooding (DAF) for the flooded duration of the study.…”

Section: Gas Sampling and Analysismentioning

confidence: 99%

“…Enclosed headspace chambers, as detailed by Livingston and Hutchinson [47] and similar to those used in previous studies [30,32,48,49], were used for collection of gas samples. This methodology is commonly used for measuring trace gas fluxes [50] and involves the use of 30-cm inner diameter (ID) polyvinyl chloride to create a permanent base collar, several sizes of chamber extensions to accommodate increasing plant growth over time, and a vented sampling cap to sample a portion of each plot.…”

Section: Gas Sampling and Analysismentioning

confidence: 99%

“…Gas samples for flux measurements occurred on approximately weekly intervals at 7,14,21,28,35,43,49,56,63,71, and 77 days after flooding (DAF) for the flooded duration of the study. Sampling intensity was increased after flood release to 80, 82, 83, 84, and 85 DAF [i.e., 2, 4, 5, 6, and 7 days after flood release (DAFR)] in an attempt to adequately quantify a post-flood-release pulse of CH4 that has commonly been observed in previous studies [32,48,49,51,54,55,56].…”

Section: Gas Sampling and Analysismentioning

confidence: 99%

“…Season-long total CH 4 emissions were determined for each chamber by linear interpolation between flux measurement dates. More detailed descriptions of gas sampling and analysis procedures used in this study have been previously reported [32,49].…”

Section: Gas Sampling and Analysismentioning

confidence: 99%

“…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%

See 4 more Smart Citations

Methane Emissions among Hybrid Rice Cultivars in the MidSouthern United States

A.D.¹,

K.R.²,

R.J.³

2018

View full text Add to dashboard Cite

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...

show abstract

Section: Gas Sampling and Analysismentioning

confidence: 99%

Section: Gas Sampling and Analysismentioning

confidence: 99%

Section: Gas Sampling and Analysismentioning

confidence: 99%

Section: Gas Sampling and Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

See 3 more Smart Citations

Methane Emissions among Hybrid Rice Cultivars in the MidSouthern United States

A.D.¹,

K.R.²,

R.J.³

2018

View full text Add to dashboard Cite

show abstract

Methane flux measurements in rice by static flux chamber and eddy covariance

Reba

Fong

Rijal

et al. 2020

Agrosystems Geosci & Env

View full text Add to dashboard Cite

Understanding methane (CH4) fluxes from rice (Oryza sativa L.) at the field scale is paramount to reducing environmental impacts while ensuring global food security. Greenhouse gas (GHG) measurements at the plot scale using static flux chambers (SFC) have long informed the understanding of flux dynamics and have largely been the basis of global flux estimates. However, in many parts of the world, the landscapes where agricultural fluxes are generated come from larger fields. Eddy covariance (EC) can measure trace gases on larger fields, but there are few studies available quantifying CH4 emissions under typical practices at a field scale. Furthermore, few of these studies are from the U.S. Midsouth, the largest producer of U.S. rice. This study compares and quantifies field‐scale SFC and EC flux measurements on a large commercial system in northeastern Arkansas during the 2015 and 2016 growing seasons, following typical producer practices. Daily measured SFC CH4 fluxes did not differ from EC‐daily CH4 fluxes (p = .108). Total season CH4 emissions, calculated as the sum of daily fluxes ranged from 50 to 156 kg CH4 ha−1 season−1, with SFC reporting greater emissions than EC. Although SFC and EC‐daily flux measurements were similar early (p = .382) and late (p = .543) in the season, they differed mid‐season (p < .001) with SFC consistently reporting greater fluxes than EC. The findings of this study help unify season long plot‐scale and field‐scale flux measurements and signify an advancement of our understanding of GHG fluxes from rice systems.

show abstract

Water regime and fertilizer‐phosphorus source effects on greenhouse gas emissions from rice

Della Lunga,

Brye,

Roberts

et al. 2024

Agrosystems Geosci & Env

Self Cite

View full text Add to dashboard Cite

Greenhouse gas (GHG) emissions from rice (Oryza sativa) systems have been correlated to water management practice, but to date, no study has directly evaluated three main GHGs (i.e., methane [CH4], nitrous oxide [N2O], and carbon dioxide [CO2]) under flood‐ and furrow‐irrigated conditions at the same time as affected by various fertilizer‐phosphorus (P) sources, in particular the reportedly slow‐release struvite‐P source. Therefore, the objective of this study was to evaluate the effect of water regime (flooded and furrow‐irrigated) and fertilizer‐P source (diammonium phosphate, chemically precipitated struvite, electrochemically precipitated struvite [ECST], triple superphosphate, and an unamended control) on GHG emissions and two‐ and three‐gas global warming potentials (GWP* and GWP, respectively) in the greenhouse. Methane emissions were 10 times greater (p < 0.05) under flooded (29.4 kg CH4 ha−1 season−1) than under furrow‐irrigated conditions (2.9 kg CH4 ha−1 season−1), and four times lower (p < 0.05) with ECST (3.4 kg CH4 ha−1 season−1) than other fertilizer‐P sources, while CO2 emissions were three times greater (p < 0.05) under furrow‐irrigated (23,428 kg CO2 ha−1 season−1) than under flooded (8290 kg CO2 ha−1 season−1) conditions. The GWP* under furrow‐irrigated conditions was almost 40% lower (p < 0.05) than under flooded conditions. Although N2O emissions were unaffected by fertilizer‐P source, the N2O contribution to GWP* was more than 80% under furrow‐irrigated conditions. Flood‐ and furrow‐irrigated water regimes require diversified approaches in GHG mitigation, where the best management for ECST needs to be more fully evaluated.

show abstract

Previous Crop and Cultivar Effects on Methane Emissions from Drill-Seeded, Delayed-Flood Rice Grown on a Clay Soil

Cited by 36 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

Methane flux measurements in rice by static flux chamber and eddy covariance

Water regime and fertilizer‐phosphorus source effects on greenhouse gas emissions from rice

Contact Info

Product

Resources

About