Methane and nitrous oxide emissions from rice and maize production in diversified rice cropping systems

Weller, Sebastian; Kraus, David; Ayag, Kevin Ray; Waßmann, Reiner; Alberto, Ma. Carmelita R.; Butterbach‐Bahl, Klaus; Kiese, Ralf

doi:10.1007/s10705-014-9658-1

Cited by 79 publications

(56 citation statements)

References 49 publications

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“…Rice roots are colonized by a community of anaerobic bacteria and methanogenic archaea that are able to produce CH 4 , most probably not only from soil organic matter but also from root exudates derived from photosynthetically fixed carbon (Pump and Conrad 2014;Watanabe et al 1999;Yuan et al 2012). Maize fields, however, that are cultivated under drained upland conditions do not show Archaea Bacteria production and emission of CH 4 as seen on the experimental fields in our study Weller et al 2015). Although both maize as well as rice roots contained archaeal OTUs from all major methanogenic taxonomic orders, the absolute abundance of methanogenic archaea was lower on maize than on rice roots.…”

Section: Discussioncontrasting

confidence: 42%

“…This work was part of the interdisciplinary project BIntroducing Non-Flooded Crops in RiceDominated Landscapes: Impact on Carbon, Nitrogen, and Water Cycles (ICON)^. A detailed description of the field experiment can be found in Weller et al (2015). The experiment consisted of a flooded rice-maize crop rotation (MR) and a control with only flooded rice (RR).…”

Section: Sampling Site and Sample Processingmentioning

confidence: 99%

“…1). The field plots were adjacent on the same soil as described before (Breidenbach et al 2016a;Weller et al 2015). …”

Section: Microbial Abundancementioning

confidence: 99%

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The effect of crop rotation between wetland rice and upland maize on the microbial communities associated with roots

et al. 2017

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Background and aims Microorganisms colonize plant roots for mutual benefits. Colonization is initiated by the soil microbial community but is also affected by soil conditions and plant type. Rice typically grows under wetland conditions that are anoxic, thus being supportive for an anaerobic methanogenic microbial community. Maize, however, grows under upland conditions that are oxic, thus being supportive for an aerobic microbial community. Crop rotation between wetland rice and upland maize is not uncommon, but the effect of this management on microbial colonization of plant roots is largely unknown and was the aim of our study. Methods We used the roots of rice and maize from a two-year study in the Philippines, where on the same soil wetland rice was cultivated either in both wet and dry season or was rotated with upland maize in the dry season. The microbial colonization of the root ecto-and endorhizosphere was assessed by using quantitative PCR and illumina sequencing of the bacterial and archaeal 16S rRNA genes. Results The data showed that maize roots had completely different microbial community structures than the rice roots from continuous wetland cultivation, while rice roots from crop rotation were in-between. These effects of management were seen for each of the different bacterial phyla. For example, among the most abundant operational taxonomic units (OTUs) Firmicutes, Deltaproteobacteria and the methanogenic Methanocella spp. were less abundant while Alphaproteobacteria and the methanogenic Methanobacterium spp. were more abundant on maize than on rice roots. Conclusions Our study showed that root colonization by Archaea and Bacteria was strongly affected by crop rotation between wetland rice and upland maize.

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Section: Discussioncontrasting

confidence: 42%

Section: Sampling Site and Sample Processingmentioning

confidence: 99%

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The effect of crop rotation between wetland rice and upland maize on the microbial communities associated with roots

et al. 2017

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“…Weller et al [29] investigated and compared differences in N 2 O and CH 4 emissions from traditional paddy rice, upland 'aerobic' rice, and maize systems in a dry subtropical climate by employing an automated static chamber method of GHG emission measurement. The study concluded that though CH 4 emissions from the upland rice were lower than the paddy rice system, yield was below average, and also a shift from the paddy system to the upland system will only amount to pollution swapping since N 2 O emissions were higher in the upland system.…”

Section: Research In Other Continentsmentioning

confidence: 99%

“…The physiology of rice plants regulates methane emissions by making available sources of methanogenic substrates through carbon in the roots, including exudates, and also by transporting CH 4 emissions through the aerenchyma [11,[31][32][33][34]. Several studies have confirmed variations in the emission levels of different rice cultivars [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39].…”

Section: Rice Cultivar (Variety) Impact On Ghg Emissionsmentioning

confidence: 99%

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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Diurnal patterns of methane emissions from paddy rice fields in the Philippines

Weller

Kraus

Butterbach‐Bahl

et al. 2015

J. Plant Nutr. Soil Sci.

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Methane (CH 4 ) emissions from rice paddies often show significant diurnal variations, most likely driven by diurnal changes of radiation and temperature in air, floodwater, and soil. Field measurements, however, are often scheduled at a fixed time of a given measuring day, thereby neglecting sub-daily variations of CH 4 emissions. Here we evaluated diurnal patterns of CH 4 emissions from traditional paddy rice production as observed during field measurements in the Philippines. Field emissions were measured during three consecutive cropping seasons using an automated chamber and gas sampling system with fluxes being obtained every 4 h. Methane fluxes were monitored with a total of nine chambers during the dry seasons in 2012 and 2013 and 27 chambers during the wet season in 2012. Significant and consistent diurnal patterns of CH 4 emissions were mainly observed from the start of field flooding until the middle of cropping periods, i.e., periods with low leaf area of the rice crop. Our data show that disregarding the diurnal variability of fluxes results in an average overestimation of seasonal CH 4 emissions of 22% (16-31%) if measurements were conducted only around noon. Scheduling manual sampling either at early morning (7:00-9:00) or evening (17:00-19:00) results in estimations of seasonal emissions within 94-101% of the ''true'' value as calculated from multiple daily flux measurements. Alternatively, uncertainties of seasonal emissions can be reduced to an average of 3% by applying sinus function or Gauss function-based correction factors. Application of correction factors allows the performance of flux measurements at any time of day. We also investigated N 2 O emissions from rice paddies with respect to diurnal variations, but did not find, as in the case of CH 4 , any significant and persistent diurnal pattern.

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Methane and nitrous oxide emissions from rice and maize production in diversified rice cropping systems

Cited by 79 publications

References 49 publications

The effect of crop rotation between wetland rice and upland maize on the microbial communities associated with roots

The effect of crop rotation between wetland rice and upland maize on the microbial communities associated with roots

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

Diurnal patterns of methane emissions from paddy rice fields in the Philippines

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