title: [Effects of no-tillage and fertilization on paddy soil CH4 and N2O emissions and their greenhouse effect in central China].
abstract: By using static chamber-gas chromatographic techniques, the CH4 and N2O emissions from the paddy soil in southeast Hubei were measured. Four treatments were installed, i.e., no-tillage plus no-fertilization (NT0), conventional tillage plus no-fertilization (CT0), no-tillage plus fertilization (NTC), and conventional tillage plus fertilization (CTC). In all treatments, the CH4 emission had a seasonal variation of increasing first and decreasing then, while the N2O emission had no significant seasonal variation. Fertilization increased the CH4 and N2O emissions significantly. NT0 increased the CH4 emission and decreased the N2O emission significantly, compared with CT0; NTC only decreased the CH4 emission and increased the N2O emission slightly, compared with CTC. The analysis on the integrated greenhouse effect of CH4 and N2O showed that NT0 increased the effect by 25.9%, compared with CT0, while NTC decreased the effect by 10.1%, compared with CTC. Therefore, a reasonable arrangement of fertilization and no-tillage could reduce the integrated greenhouse effect of CH4 and N2O from paddy field.
authors.affiliation: Ministry of Agriculture Key Laboratory of Huazhong Crop Physiology, Ecology and Production, Huazhong Agricultural University, Wuhan 430070, China. gzdai1111@yahoo.cn
authors.forename: Guang-zhao
authors.initials: GZ
authors.lastname: Dai
authors.forename: Cheng-fang
authors.initials: CF
authors.lastname: Li
authors.forename: Cou-gui
authors.initials: CG
authors.lastname: Cao
authors.forename: Ming
authors.initials: M
authors.lastname: Zhan
authors.forename: Le-ga
authors.initials: LG
authors.lastname: Tong
authors.forename: Shao-hua
authors.initials: SH
authors.lastname: Mei
authors.forename: Zhong-bing
authors.initials: ZB
authors.lastname: Zhai
authors.forename: Duan-yang
authors.initials: DY
authors.lastname: Fan
mesh_terms: D000383:Agriculture / Q000379:methods; D002681:China; D005308:Fertilizers; D017752:Greenhouse Effect; D000432:Methanol / Q000032:analysis*; D009609:Nitrous Oxide / Q000032:analysis*; D012275:Oryza / Q000254:growth & development* / Q000378:metabolism; D012987:Soil / Q000032:analysis*
chemical_list: D005308:Fertilizers; D012987:Soil; D009609:Nitrous Oxide; D000432:Methanol