Emissions of CH4 and N2O under Different Tillage Systems from Double-Cropped Paddy Fields in Southern China
作者： Hai-Lin Zhang , Xiao-Lin Bai , Jian-Fu Xue , Zhong-Du Chen , Hai-Ming Tang
DOI: 10.1371/JOURNAL.PONE.0065277
关键词:
摘要: Understanding greenhouse gases (GHG) emissions is becoming increasingly important with the climate change. Most previous studies have focused on assessment of soil organic carbon (SOC) sequestration potential and GHG from agriculture. However, specific experiments assessing tillage impacts emission double-cropped paddy fields in Southern China are relatively scarce. Therefore, objective this study was to assess effects systems methane (CH4) nitrous oxide (N2O) a double rice (Oryza sativa L.) cropping system. The experiment established 2005 Hunan Province, China. Three treatments were laid out randomized complete block design: conventional (CT), rotary (RT) no-till (NT). Fluxes CH4 different followed similar trend during two years, single peak for early season late season. Compared other treatments, NT significantly reduced among growing seasons (P<0.05). much higher variations N2O observed across due vulnerability external influences. amount relative emission. Conversion CT cumulative both compared mean value global warming potentials (GWPs) over 100 years order NT
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