Pathways of N2O emission from rice paddy soil

Yan, Xiaoyuan; Shi, Sixue; Du, Liuying; Xing, Guangxi

doi:10.1016/s0038-0717(99)00175-3

Cited by 87 publications

(52 citation statements)

References 11 publications

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“…The higher rice biomass of the NG than CY cultivar might explain the higher cumulative N 2 O emissions, which supports the hypothesis of plant sources of N 2 O (Chen et al 2003). This finding also supports the results of Yan et al (2000) and Xing et al (2009) that N 2 O is emitted mainly through rice plants in the presence of floodwater and through soil surface in the absence of floodwater.…”

Section: Results and Analysissupporting

confidence: 91%

Greenhouse gas emissions during the seedling stage of rice agriculture as affected by cultivar type and crop density

Wang

Zhou

et al. 2012

Biol Fertil Soils

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Methane (CH 4 ) and nitrous oxide (N 2 O) emissions from a paddy nursery at the rice seedling stage were measured on a daily basis by using the conventional rice cultivar Nangeng 56 under both conventional (NG-C) and reduced (NG-R) sowing density, and the hybrid rice Changyou 3 under both conventional (CY-C) and reduced (CY-R) sowing density. High N 2 O and CH 4 emissions were observed during the first and last 2 weeks, respectively. Cumulative CH 4 emissions were significantly (P < 0.001) affected by sowing density rather than by the rice cultivar. Cumulative CH 4 emissions reached 68.2 kg C ha −1 in the CY-C treatment and 121.6 kg C ha −1 in the NG-C treatment, which were significantly (P<0.001) higher than the emissions at reduced sowing densities (15.9 kg C ha −1 in the CY-R treatment and 20.9 kg C ha −1 in the NG-R treatment). Under the conventional sowing density, cumulative CH 4 emissions during the seedling stage were comparable to data of ricegrowing season. Both the rice cultivar and the sowing density significantly (P<0.05-0.01) affected cumulative N 2 O emissions. Relative to the CY cultivar, the NG cultivar increased global warming potential (GWP) over a 100-year horizon by 62.1% and 70.7% under the reduced and conventional sowing densities, respectively. The GWP of N 2 O and CH 4 during the seedling stage was equivalent to the GWP of the entire ricegrowing season in this region, indicating that the seedling stage is an important greenhouse gas emission source of rice agriculture.

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Section: Results and Analysissupporting

confidence: 91%

Greenhouse gas emissions during the seedling stage of rice agriculture as affected by cultivar type and crop density

Wang

Zhou

et al. 2012

Biol Fertil Soils

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“…NO 3 --N served as a substrate for denitrification by the denitrifiers and resulted in N 2 O emission. Previous studies have confirmed our results that soil moisture is the most sensitive factor in regulating N 2 O emissions from croplands (Zheng et al, 2000;Yan et al, 2000).…”

Section: Nitrous Oxide Emissionsupporting

confidence: 91%

Sobering Rice Production from Conventional to Climate Smart

Krishnan¹,

Lakshmanan²,

Ajith³

et al. 2017

Int.J.Curr.Microbiol.App.Sci

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“…Increasing root length also helps the nitrification process by supplying sufficient O 2 to the rhizosphere and thereby increasing the NO − 3 content in the rice rhizosphere (Pathak, 1999). It was reported that plants can serve as a conduit for dissolved gases from the root zone to the atmosphere, and nitrous oxide as a water-soluble molecule can hence be taken up by plant roots and transported to leaves via the transpiration stream (Yan et al, 2000). The higher seasonal emission in the rice varieties Phorma and Siana with higher root biomass observed in our study might be contributed by the greater root surface area for gas transportation.…”

Section: Resultsmentioning

confidence: 48%

“…It has been elucidated that the availability of nitrate, labile C compounds and O 2 is greatly affected by the existence of growing plants and hence affects N 2 O production in soil. Contribution of rice plants to the emission of N 2 O from paddy soil is also reported by Mosier et al (1990) and Yan et al (2000). The main pathway of N 2 O transport is along the transpiration stream and is released through open stomata (Ferch and Romheld, 2001), The larger accumulation of biomass due to plant growth stimulation may increase the availability of C and N substrate in soil and hence accelerate N 2 O formation (Jiang et al, 2006).…”

Section: Introductionmentioning

confidence: 76%

N2O emission in relation to plant and soil properties and yield of rice varieties

Baruah

Gogoi

et al. 2010

Agron. Sustain. Dev.

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-Nitrous oxide (N 2 O) is a major greenhouse gas contributing to global warming. Rainfed rice fields are considered to be a notable source of atmospheric N 2 O emission. To investigate the dynamics of N 2 O emission and the relationship of plant and soil properties with emission of N 2 O in rice, a field experiment was conducted. The five popularly grown rice varieties Luit, Disang, Kapilli, Siana and Phorma were grown in the fall season under rainfed conditions. N 2 O emission was measured at seven-day intervals starting from the day of transplanting for the whole crop growing season. We also measured soil parameters, e.g. soil pH, soil temperature, soil organic carbon, soil NO

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Pathways of N2O emission from rice paddy soil

Cited by 87 publications

References 11 publications

Greenhouse gas emissions during the seedling stage of rice agriculture as affected by cultivar type and crop density

Greenhouse gas emissions during the seedling stage of rice agriculture as affected by cultivar type and crop density

Sobering Rice Production from Conventional to Climate Smart

N2O emission in relation to plant and soil properties and yield of rice varieties

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