Combined emission of CH4 and N2O from a paddy field was reduced by preceding upland crop cultivation

作者: Seiichi Nishimura , Hiroko Akiyama , Shigeto Sudo , Tamon Fumoto , Weiguo Cheng

DOI: 10.1080/00380768.2010.551346

关键词: Multiple croppingCrop cultivationGreenhouse gasCroppingCrop rotationNitrous oxideAgronomyUpland riceEnvironmental sciencePaddy field

摘要: Since crop rotation between paddy rice and upland crops is widely conducted in Japan other Asian countries, the effect of on greenhouse gas emission should be clarified. In this study, methane (CH4) nitrous oxide (N2O) fluxes were simultaneously measured for two years from 2004 to 2005 a field with three different cultivation histories, i.e. consecutive (PR), single cropping (UR), double soybean wheat (SW) preceding 2002 2003. 2004, cumulative CH4 emissions UR SW plots 511 2817 g CH4 m−2 y−1, which 8 46%, respectively, that PR (6092 g CH4 m−2 y−1). 2005, 5123 1331 g 87 23%, (5893 g CH4 m−2 y−1), although differences not statistically significant. The soil reduction/oxidation potential (Eh) p...

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