Methane emissions from rice fields: Effect of soil properties

Sass, Ronald L.; Fisher, Frank M.; Lewis, Sandra Tracey; Jund, M. F.; Turner, Fred

doi:10.1029/94gb00588

Cited by 94 publications

(62 citation statements)

References 13 publications

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“…Though hourly CH 4 fluxes were greater at 1200 and 2300 hours, which did not differ, than at 300 hours, estimated daily emissions from 300, 1200, and 2300 hours were all similar to the all-times mean estimated daily CH 4 from the silt-loam soil (Table 3), which characterized fluxes from relatively lowemissions soils [47]. Though not formally assessed, the numerically lower emissions from the clay compared to the silt-loam soil are consistent with previous reports [16] [18] [19]. It is generally understood that lower gas diffusion rates associated with finer-(i.e., clays) compared to coarser-textured soils (i.e., silt loams) allow for greater CH 4 oxidation before being emitted to the atmosphere, thereby reducing CH 4 emissions [19].…”

Section: Hourly Ch4 Fluxes and Estimated Daily Emissionssupporting

confidence: 80%

“…However, numerous studies have also reported no significant difference in CH 4 emissions between day and night [6] [14] [15]. Differences between cultivars have generally been consistent given the multitude of factors that have been shown to affect CH 4 fluxes and emissions throughout a growing season, such as soil texture [16] [17] [18] [19], fertilizer nutrient source [20], organic soil amendments [8] [12], residue management/previous crop [21] [22] [23] [24], water management scheme [8] [25] [26], and production system [27]. Typically, hybrid rice cultivars have lower season-long CH 4 emissions than do pure-line cultivars [23] [24] [28] [29].…”

Section: Introductionmentioning

confidence: 99%

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Diurnal Methane Fluxes as Affected by Cultivar from Direct-Seeded, Delayed-Flood Rice Production

Brye¹,

Smartt²,

Norman³

2017

JEP

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Methane (CH 4 ) emissions are known to differ between rice (Oryza sativa L.) cultivars, where CH 4 emissions from pure-line cultivars are often greater than from hybrids. Numerous field studies have shown that CH 4 emissions follow a diurnal pattern, typically reaching their maximum during afternoon hours. However, it is unknown whether cultivar affects CH 4 fluxes/emissions at various measurement times of day or how those cultivar effects may differ spatially across soil textures and temporally throughout the rice growing season. The objective of this field study was to evaluate the effects of time of day (300, 800, 1200, 1800, and 2300 hours) and cultivar (one hybrid and one pure-line) on CH 4 fluxes before and after heading from a silt-loam and clay soil in a direct-seeded, delayed-flood rice production system. Enclosed headspace chambers, 30 cm in diameter, were used for CH 4 gas sampling on 22 July and 19 August at a silt-loam site and on 29 July and 26 August, 2014 at a clay-soil site in the Lower Mississippi River delta region of eastern Arkansas. Methane fluxes measured pre-and post-heading ranged from 0.7 to 2.2 mg CH 4 -C m −2• hr −1 from the clay soil and from 2 to 7 mg CH 4 -C m −2•hr −1 from the silt-loam soil. Hourly CH 4 fluxes and estimated daily emissions differed among measurement times of day (P < 0.05) for a given cultivar or averaged across cultivars and differed between cultivars (P < 0.05) from the silt-loam soil, but not the clay soil. Results suggested that the optimum measurement time of day to capture either minimum, maximum, or average hourly CH 4 flux or daily emissions for a given day differs by soil texture and rice growth stage, but conducting CH 4 flux measurements around late morning to mid-day appear to be optimum to best capture the mean CH 4 emissions for the day.

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Section: Hourly Ch4 Fluxes and Estimated Daily Emissionssupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Diurnal Methane Fluxes as Affected by Cultivar from Direct-Seeded, Delayed-Flood Rice Production

Brye¹,

Smartt²,

Norman³

2017

JEP

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“…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. Lower emissions measured in this study relative to those reported by Rogers et al [30] may be due to a combination of lower sand content or greater extractable soil P, both of which have been shown to result in reduced emissions [72,73]. Results obtained by AdvientoBorbe et al [54], where emissions from CLXL745 averaged 44 kg CH 4 -C ha -1 season -1…”

Section: Seasonal Methane Emissionsmentioning

confidence: 30%

“…Methane oxidation in flooded-rice systems occurs at oxic-anoxic interfaces where a group of aerobic Proteobacteria, known as methanotrophs, utilize CH 4 or methanol as a source of energy and carbon [9]. Research has consistently indicated that up to 90% of CH 4 produced in rice cultivation systems is oxidized by methanotrophs [15,16,17,18,19] as CH 4 moves through the oxygenated zones of soil surrounding rice roots [20,21] and near the soil surface [19,22].…”

Section: Introductionmentioning

confidence: 99%

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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“…Os resultados obtidos podem estar refletindo muito mais condições especificas de amostragem que diferenças reais. Por exemplo, as emissões do CH 4 ocorridas nos meses de janeiro e maio (Tabela 13 e Figura 12) podem ser explicadas pelo fato de ter chovido na noite anterior e minutos antes da coleta, pois, a umidade é determinante na difusão e no fluxo desse gás (CRILL, 1991 (HUANG et al, 1997;SASS et al, 1994).…”

Section: (‰)unclassified

Emissão de gases de efeito estufa em solo cultivado com pastagem (Tifton 85) e irrigado com efluente de esgoto tratado

Santin¹

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Emissão de gases de efeito estufa em solo cultivado com pastagem (Tifton 85) e irrigado com efluente de esgoto tratado Roberta Clemente SantinDissertação apresentada para obtenção do título de Mestre em Ciências. Atualmente, os maiores desafios para a humanidade são a iminente escassez de água, o aumento da produção de alimentos e a busca de fontes alternativas de energia. O uso de efluentes de esgoto tratado (EET) para irrigação agrícola pode, além de fornecer água, nutrientes e matéria orgânica para produção agrícola, minimizar o impacto ambiental causado pela sua disposição nos corpos d'água e aumentar a disponibilidade de água para outros fins. Pode ainda, aumentar a produção agrícola em uma mesma área, conservando as áreas florestadas, reduzir as despesas do agricultor com fertilizantes nitrogenados, e atuar na redução dos gases de efeito estufa na atmosfera, pela maior produção de biomassa e pelo acúmulo de carbono no solo através da rizodeposição e deposição de resíduos vegetais. Apesar desses aspectos favoráveis, esta prática interfere no sistema soloplanta-água modificando as entradas e saídas de carbono e nitrogênio de seus diferentes reservatórios Até o presente momento, pouco foi investigado sobre os efeitos da irrigação com esgoto tratado nas emissões de CH 4 , CO 2 e N 2 O pelo solo. Desta forma, o presente trabalho teve como objetivo principal quantificar as emissões de CO 2 , CH 4 e N 2 O, por meio do estudo de um Argissolo Vermelho Distrófico Latossólico, cultivado com capim Tifton 85 e irrigado com efluente de esgoto tratado produzido por tratamento biológico do esgoto do Município de Lins, SP. Tem ainda como objetivo avaliar mudanças ocorridas na química do solo em relação as concentrações de sódio, carbono e nitrogênio e a produtividade da capim. As principais conclusões foram que (i) o capim Tifton 85 foi mais produtivo nos tratamentos que receberam irrigação com EET, quando comparados àqueles irrigados com água; (ii) a concentração de Na no solo apresentou um aumento significativo independente do tipo de irrigação utilizada (EET ou água); (iii) a irrigação com EET contribuiu para elevar as concentrações de carbono e nitrogênio no solo; (iv) as emissões de N 2 O e CO 2 dependem predominantemente da umidade do solo, da temperatura e das quantidades de fertilizantes nitrogenado mineral aplicados e menos do tipo de água utilizada na irrigação; (v) o CH 4 foi o único que não apresentou relação direta de suas emissões com a sazonalidade climática; (vi) as emissões de CO 2 , N 2 O e CH 4 pelos solos irrigados com EET não diferem de pastagens não irrigadas ou irrigadas com água, sendo mais influenciadas pelas práticas de manejo. Os resultados indicam que a irrigação de culturas com EET é uma pratica sustentável.

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Methane emissions from rice fields: Effect of soil properties

Cited by 94 publications

References 13 publications

Diurnal Methane Fluxes as Affected by Cultivar from Direct-Seeded, Delayed-Flood Rice Production

Diurnal Methane Fluxes as Affected by Cultivar from Direct-Seeded, Delayed-Flood Rice Production

Methane Emissions among Hybrid Rice Cultivars in the MidSouthern United States

Emissão de gases de efeito estufa em solo cultivado com pastagem (Tifton 85) e irrigado com efluente de esgoto tratado

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