title: N2O emissions from an apple orchard in the coastal area of Bohai Bay, China.
abstract: Using static chambers and gas chromatography, nitrous oxide (N2O) fluxes from an apple orchard soil in the Bohai Bay region of China were measured from February 2010 to February 2011. In this study, two nitrogen (N) fertilizer treatments were designed--without (CK) or with (SN) synthetic N fertilizers (800 kg N ha(-1)). The annual cumulative N2O emissions from CK and SN were 34.6 ± 3.0 (mean ± standard error) and 44.3 ± 6.0 kg N2O-N ha(-1), respectively. Such high emissions resulted from the intensive N fertilization in the experimental and previous years. The direct emission factor (EFd) of N2O induced by the applied synthetic N fertilizers was 1.2%. The EFd is within the range of previous studies carried out in other croplands, which suggests that it is reasonable to estimate regional N2O emissions from apple orchards using the EFd obtained in other croplands. In addition, significant positive correlations existed between N2O fluxes and soil temperatures or soil dissolved organic carbon contents.
authors: Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), Shandong Provincial Key Laboratory of Coastal Zone Environmental Processes, YICCAS, Yantai Shandong 264003, China.
authors: Baohua
authors: B
authors: Xie
authors: Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), Shandong Provincial Key Laboratory of Coastal Zone Environmental Processes, YICCAS, Yantai Shandong 264003, China.
authors: Junbao
authors: J
authors: Yu
authors: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China.
authors: Xunhua
authors: X
authors: Zheng
authors: Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), Shandong Provincial Key Laboratory of Coastal Zone Environmental Processes, YICCAS, Yantai Shandong 264003, China.
authors: Fanzhu
authors: F
authors: Qu
authors: Agricultural Resources and Environment Institute, Shandong Academy of Agricultural Sciences, 202 Gongyebei Road, Jinan 250100, China.
authors: Yu
authors: Y
authors: Xu
authors: Agricultural Resources and Environment Institute, Shandong Academy of Agricultural Sciences, 202 Gongyebei Road, Jinan 250100, China.
authors: Haitao
authors: H
authors: Lin
mesh_terms: D000383:Agriculture; D002681:China; D027845:Malus / Q000737:chemistry*; D009609:Nitrous Oxide / Q000737:chemistry*; D012987:Soil / Q000737:chemistry*
chemical_list: D012987:Soil; D009609:Nitrous Oxide