DOI: 10.1016/j.atmosenv.2015.01.018
Scopus记录号: 2-s2.0-84936766430
论文题名: Increase in CH<inf>4</inf> emission due to weeds incorporation prior to rice transplanting in a rice-wheat rotation system
作者: Zhang G ; , Zhang W ; , Yu H ; , Ma J ; , Xu H ; , Yagi K
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 116 起始页码: 83
结束页码: 91
语种: 英语
英文关键词: CH4 oxidation
; CH4 production potential
; China
; Jiangsu
; Paddy fields
; Stable carbon isotopes
Scopus关键词: Budget control
; Carbon
; Isotopes
; Oxidation
; Soil moisture
; Soils
; China
; Jiangsu
; Jiangsu province
; Paddy fields
; Relative contribution
; Rice-wheat rotations
; Stable carbon isotopes
; Winter seasons
; Soil pollution
; ammonia
; methane
; nitrogen
; agricultural emission
; carbon isotope
; concentration (composition)
; crop rotation
; methane
; methanogenesis
; oxidation
; paddy field
; rice
; seasonal variation
; soil chemistry
; weed
; wheat
; agriculture
; Article
; carbon footprint
; China
; crop rotation
; priority journal
; rice
; soil
; weed
; wheat
; China
; Jiangsu
; Triticum aestivum
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Planting winter wheat with rice straw application (WS) after rice harvest is a typical practice in Jiangsu Province, China. However, in the past decades quite a large area of paddy fields appeared to be left in fallow in the winter season, letting abundant weeds incorporated prior to rice transplanting (FSW) during the following rice season. Little is known about the effects of WS and FSW on the process of CH4 emission and on relative contribution of acetate to total CH4 production (Fac ) and fraction of CH4 oxidized (Fox ). Results show that FSW significantly increased CH4 production potential of paddy soil, CH4 concentration in soil solution, and CH4 emission from the fields (P<0.01) but WS played a slight role. CH4 oxidation was more influenced by soil NH4+-N content and temperature rather than FSW and WS. The total CH4 emission from paddy fields in the Jiangsu Province during the rice season were estimated to increase by 0.30-0.37 and 0.14-0.21Tg CH4 in 2008 and 2009, respectively, as a result of FSW. Similar δ13C-values of CH4 production and emission, and CH4 dissolved in soil solution over the season suggest that FSW and WS played a minor role in Fac and Fox . Generally, acetoclastic methanogenesis was dominated (~80%) at the beginning and the end of the season while Fox was very high (over 65%) throughout most of the rice season. The findings indicate that FSW significantly increased CH4 emission. If this fact is not taken into account seriously, budget of regional CH4 emission from paddy fields will be significantly underestimated. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81610
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China; University of Chinese Academy of Sciences, Beijing, China; National Institute of Agro-Environmental Sciences, 3-1-3 Kannondai, Tsukuba, Ibaraki, Japan
Recommended Citation:
Zhang G,, Zhang W,, Yu H,et al. Increase in CH<inf>4</inf> emission due to weeds incorporation prior to rice transplanting in a rice-wheat rotation system[J]. Atmospheric Environment,2015-01-01,116