Contribution of winter cover crop amendments on global warming potential in rice paddy soil during cultivation

Kim, Sang Yoon; Lee, Chang Hoon; Gutierrez, Jessie; Kim, Pil Joo

doi:10.1007/s11104-012-1403-4

Cited by 79 publications

(41 citation statements)

References 56 publications

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“…To compare grain yield and GHG emissions in field studies, many researchers have used yield-scaled GHG as an indicator of the global warming impact of rice production (Mosier et al 2006;van Groenigen et al 2010;Kim et al 2012Kim et al , 2013. As suggested by Grassini and Cassman (2012), the yield-scaled metric is increasingly used to provide a measure of agronomic efficiency that begins to address both climate change and future food supply concerns.…”

Section: Yield-scaled Methane Emissionmentioning

confidence: 99%

Effect of rice cultivars on yield-scaled methane emissions in a double rice field in South China

Qin

Wang

et al. 2015

Journal of Integrative Environmental Sciences

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Section: Yield-scaled Methane Emissionmentioning

confidence: 99%

Effect of rice cultivars on yield-scaled methane emissions in a double rice field in South China

Qin

Wang

et al. 2015

Journal of Integrative Environmental Sciences

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“…Por outro lado, o aporte exclusivo de azevém resultou nos menores fluxos de N 2 O, provavelmente pela reduzida disponibilidade de N no solo em virtude da imobilização microbiana decorrente da elevada relação C/N dos resíduos dessa planta. Além disso, resíduos com elevada relação C/N intensificam as condições anaeróbias do solo com a redução do N 2 O a N 2 (Kim et al, 2013).…”

Section: Resultsunclassified

“…O aporte de resíduos vegetais previamente ao cultivo do arroz irrigado altera as condições de oxirredução do solo e pode ter efeitos distintos sobre as emissões de CH 4 e N 2 O pelo solo (Kim et al, 2013). A adição de material orgânico, além de favorecer processos de redução no solo, também intensifica as emissões de CH 4 pela disponibilização de C lábil para microrganismos metanogênicos (Kim et al, 2012).…”

Section: Introductionunclassified

Impacto de plantas de cobertura e da drenagem do solo nas emissões de CH 4 e N 2 O sob cultivo de arroz irrigado

Zschornack

Rosa

Camargo

et al. 2016

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar o impacto das plantas de cobertura de inverno azevém (Lolium multiflorum) e azevém+cornichão (Lotus corniculatus), bem como da drenagem parcial do solo, nas emissões de CH 4 e N 2 O em um Planossolo cultivado com arroz irrigado. Amostras de ar foram coletadas semanalmente com câmara estática fechada, parcialmente inserida no solo (0,05 m). Calcularam-se o potencial de aquecimento global parcial (PAGp=CH 4 ×25+N 2 O×298) e o PAGp por unidade de produtividade de grãos (PAGpPG). A drenagem parcial foi estabelecida pela suspenção temporária da irrigação por períodos de 8 a 15 dias, durante três ocasiões ao longo do ciclo da cultura. O aporte de resíduos pelas plantas de cobertura intensificou os fluxos de CH 4 do solo, que excederam em dez vezes a emissão acumulada do solo em pousio invernal. As emissões de N 2 O foram maiores com o consórcio azevém+cornichão, em comparação ao azevém e ao pousio. O cultivo de plantas de cobertura elevou o índice PAGpPG (0,35 kg de CO 2 eq por quilograma de arroz), comparativamente ao pousio (0,06 kg kg -1 ). Nos tratamentos com cobertura de inverno, as estratégias de mitigação devem focar principalmente no CH 4 , que foi responsável pela maior porção (80%) do PAGp. A drenagem parcial reduziu em até 50% o PAGp e apresenta grande potencial para mitigar as emissões de gases em sistemas de produção de arroz irrigado.Termos para indexação: Oryza sativa, gases de efeito estufa, irrigação intermitente, manejo da água, potencial de aquecimento global, resíduos culturais. Impact of cover crops and soil drainage in CH 4 and N 2 O emissions under irrigated rice cultivationAbstract -The objective of this work was to evaluate the effect of the winter cover crops ryegrass (Lolium multiflorum) and ryegrass+birdsfoot trefoil (Lotus corniculatus), as well as of partial soil drainage, on CH 4 and N 2 O emissions in an Alfisol cultivated with paddy rice. Air samples were collected weekly using static closed chambers partially inserted in the soil (0.05 m). Partial global warming potential (pGWP= CH 4 ×25+N 2 O×298) and yield-scaled pGWP were calculated. Partial soil drainage was established with temporal suspensions of the irrigations for periods of 8 to 15 days, during three occasions throughout the crop cycle. Biomass input by cover crop residues increased CH 4 fluxes, which exceeded ten times the accumulated emissions of fallow soil. N 2 O emissions were higher in the ryegrass+birdsfoot trefoil treatment, compared with ryegrass and fallow. Cover crops increased yield-scaled pGWP (0.35 kg CO 2 eq per kilogram of rice) compared with fallow (0.06 kg kg -1). In the treatments with winter crops, mitigation strategies should focus mainly on CH 4 , which was responsible for the greater portion (80%) of pGWP. Partial drainage reduced pGWP up to 50% and has great potential for mitigating gas emissions in subtropical irrigated rice production systems.

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“…Greenhouse gas (GHG) emissions mainly take place from decomposing organic materials and microbial transformations of nitrogen (N) in soils under reduced conditions (Takai 1961;Garcia et al 2000;Janzen 2004;Oenema et al 2005). Moreover, addition of organic materials can promote GHG emission by providing readily available carbon (C) and substrates for nitrifying microorganisms (Neue et al 1997;Lee 2010;Hadi et al 2010;Kim et al 2013;Haque et al 2013Haque et al , 2015a. So, it is likely that improved crop production strategies could reduce GHG emission from rice fields.…”

Section: Introductionmentioning

confidence: 99%

Intermittent drainage in paddy soil: ecosystem carbon budget and global warming potential

Haque

Biswas

Kim

et al. 2016

Paddy Water Environ

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Intermittent drainage of rice fields alters soil redox potential and contributes to the reduction of CH 4 emission and thus may reduce net global warming potential (GWP) during rice cultivation. Incorporation of green biomass helps maintaining soil organic matter, but may increase CH 4 emission. We investigated net ecosystem carbon budget (NECB) and net GWP under two water management regimes-continuous flooding and intermittent drainage-having four biomass incorporation levels (0, 3, 6 and 12 Mg ha -1 ). Water management and biomass incorporation level demonstrated significant (P \ 0.05) interaction effect on the NECB and GWP. Intermittent drainage decreased the NECB by ca. 6-46 % than continuous flooding under same rates of cover crop biomass (CCB) incorporation. Moreover, intermittent drainage reduced seasonal CH 4 -C fluxes by ca. 54-58 % and net GWP by 35-58 % compared to continuous flooding. There was also no significant reduction in rice yield because of intermittent drainage under similar CCB. This implies that incorporation of 3 Mg ha -1 CCB and intermittent drainage could be a good option for reducing net GWP and higher grain yield.

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Contribution of winter cover crop amendments on global warming potential in rice paddy soil during cultivation

Cited by 79 publications

References 56 publications

Effect of rice cultivars on yield-scaled methane emissions in a double rice field in South China

Effect of rice cultivars on yield-scaled methane emissions in a double rice field in South China

Impacto de plantas de cobertura e da drenagem do solo nas emissões de CH 4 e N 2 O sob cultivo de arroz irrigado

Intermittent drainage in paddy soil: ecosystem carbon budget and global warming potential

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