Effects of elevated temperature and atmospheric carbon dioxide concentration on the emissions of methane and nitrous oxide from Portuguese flooded rice fields

Pereira, José; Figueiredo, Nuno; Goufo, Piebiep; Carneiro, J.P.; Morais, Raul; Carranca, Corina; Coutinho, João

doi:10.1016/j.atmosenv.2013.08.045

Cited by 51 publications

(30 citation statements)

References 29 publications

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“…The rice field experiment was conducted in two consecutive years (2011 and 2012) in Salvaterra de Magos (central Portugal; latitude, 39°2.2015′N; longitude, 8°44.257′W; and elevation, 18 m above mean sea level) on a clay loam soil (197 g/kg of sand, 269 g/kg of silt, and 534 g/kg of clay). Six open-top chambers (4.0 m diameter, 2.5 m height, 3.2 m open-top diameter) covered with a polyethylene film (75% light transmittance) were used in the field and constructed as described elsewhere (Pereira et al 2013;Goufo et al 2014b). 1).…”

Section: Methodsmentioning

confidence: 99%

Effect of Elevated Carbon Dioxide Concentration on Rice Quality: Proximate Composition, Dietary Fibers, and Free Sugars

et al. 2014

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Cereal Chem. 91(3):293-299Little is known regarding the impact of elevated carbon dioxide concentration ([CO 2 ]) on the chemical composition of rice grains. A field experiment was conducted with open-top chambers with rice (Oryza sativa L. cv. Ariete) grown at two levels of atmospheric CO 2 (375 and 550 μmol/mol), and their effects were monitored on the proximate composition and carbohydrate contents of the grains. Following exposure to elevated [CO 2 ], soluble dietary fiber increased by 136, 82, and 77% in brown rice, white rice, and bran, respectively. Increases of a lower magnitude (8%) were observed for insoluble dietary fiber in the bran and brown rice.* The e-Xtra logo stands for "electronic extra" and indicates that Figure 2 appears in color online.

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Section: Methodsmentioning

confidence: 99%

Effect of Elevated Carbon Dioxide Concentration on Rice Quality: Proximate Composition, Dietary Fibers, and Free Sugars

et al. 2014

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“…The field experiment was conducted over two consecutive years (2011 and 2012) in Salvaterra de Magos, Portugal (latitude, 39°2.2015′N; longitude, 8°44.257′W; and elevation, 18 m above mean sea level) on clay loam soils. Six open-top chambers (4.0 m diameter, 2.5 m height, and 3.2 m open-top diameter) covered with a polyethylene film (75% light transmittance) were used in the field and constructed as described by Goufo et al (2014b) and Pereira et al (2013). The experimental design consisted of two individual treatments, each consisting of three replicates, which were arranged in completely randomized blocks.…”

Section: Methodsmentioning

confidence: 99%

Effect of Elevated Carbon Dioxide Concentration on Rice Quality: Nutritive Value, Color, Milling, Cooking, and Eating Qualities

Goufo

Falco²,

Brites

et al. 2014

Cereal Chem

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Increase in the atmospheric carbon dioxide concentration ([CO2]) enhanced the concentration of carbohydrates in rice grains, according to results of a previous study. However, its impact on other quality traits is little known. To investigate the effect of CO2 levels (375 and 550 μmol/mol) on rice quality, a field experiment was conducted with open‐top chambers. Elevated [CO2] affected several nutritional parameters of the grain. Whereas the concentration of α‐linolenic acid increased, that of linoleic and γ‐linolenic acids decreased. For example, reductions of 9 and 28% were observed for linoleic acid in the brown rice and for γ‐linolenic acid in the husk, respectively. Phytic acid concentration and zinc bioavailability were unaffected. Whereas iron bioavailability decreased in the brown rice (22%), calcium bioavailability increased in the bran and husk (5–11%). The concentrations of essential amino acids were also reduced; for example, the amount of isoleucine in the white rice, tyrosine in the brown rice, and phenylalanine in the bran decreased by 40, 57, and 23%, respectively. In contrast, elevated [CO2] resulted in improved grain whiteness (3%) and starch viscosity (11%), with no effect on the milling quality. These data indicate that increased [CO2] has both positive and negative effects on quality, depending on the specific end use of the rice grain.

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“…Most studies with increased temperatures in the laboratory (incubation studies) (Devevre & Horwath, ; Fey & Conrad, ), in greenhouses and open‐top chambers (Ziska et al ., ; Allen et al ., ), in temperature‐controlled growth chambers (Gaihre et al ., ) and in fields (Tokida et al ., ) have shown increased CH 4 emissions with increased temperatures up to 34–37°C. On the other hand, some studies have reported a small (Yun et al ., ; Pereira et al ., ) to no effect (Gaihre et al ., ) on emissions. Decreased emissions with increasing temperature have also been reported, particularly above 37°C in a laboratory incubation experiment (Yang & Chang, ), at 4°C above ambient temperature in a greenhouse and in an open‐top chamber (Ziska et al ., ; Schrope et al ., ), and at a soil temperature above 34.5°C in the field (Parashar et al ., ).…”

Section: Introductionmentioning

confidence: 99%

Effects of increased temperatures and rice straw incorporation on methane and nitrous oxide emissions in a greenhouse experiment with rice

Gaihre

Waßmann

Villegas-Pangga

et al. 2016

European J Soil Science

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We investigated the effect of increased temperatures of water and soil, together with the incorporation of rice straw, on emissions of methane (CH4) and nitrous oxide (N2O), and the daily variation in CH4 emissions. Three temperature treatments (floodwater temperature), ambient, ambient +2°C and ambient +4°C, and two amounts of rice straw (0 and 6 t ha−1) were arranged in a randomized complete block design with four replications. The emissions of CH4 and N2O and the soil's redox potential (Eh) were measured weekly for two crop cycles. Daily variation in CH4 emission rates was measured with and without rice straw incorporation in planted and unplanted soil (with no warming treatments) during four growth stages of the crop. Methane emissions increased by as much as 91% with increasing amounts of water and soil temperature (+2 and +4°C), up to 34–35°C. Increases in temperature (+2 and +4°C above ambient) above 34–35°C decreased emissions by 30–36%. A decrease in soil Eh to < −100 mV and in CH4 emissions was observed earlier in the pots containing rice straw than in those without straw. Methane emissions varied daily; they were larger from 11:00 to 14:00 hours, particularly in unplanted soil. They showed positive correlations with the temperatures of both soil and air. In contrast, N2O emissions were negligible throughout the growing season. The emissions of CH4 evidently depend on the background temperature range; in our experiment, CH4 emissions increased up to 34°C and then they decreased above that. Highlights: GHG emissions were measured from flooded rice soil under elevated temperatures. Temperature, straw incorporation and rice plants affected daily variation in methane emissions. An increase in temperature increased methane emission by up to 91%. Increased temperature decreased methane emissions when background temperature was above 34–35°C.

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Effects of elevated temperature and atmospheric carbon dioxide concentration on the emissions of methane and nitrous oxide from Portuguese flooded rice fields

Cited by 51 publications

References 29 publications

Effect of Elevated Carbon Dioxide Concentration on Rice Quality: Proximate Composition, Dietary Fibers, and Free Sugars

Effect of Elevated Carbon Dioxide Concentration on Rice Quality: Proximate Composition, Dietary Fibers, and Free Sugars

Effect of Elevated Carbon Dioxide Concentration on Rice Quality: Nutritive Value, Color, Milling, Cooking, and Eating Qualities

Effects of increased temperatures and rice straw incorporation on methane and nitrous oxide emissions in a greenhouse experiment with rice

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