title: [Inorganic N deposition in the Bayinbuluk alpine grassland of the central Tianshan mountains].
abstract: N deposition has increased significantly with economic development and intensive human activities in China and has affected natural ecosystems in remote areas. To evaluate the atmospheric N deposition of the Bayinbuluk alpine grassland of the central Tianshan Mountains, the dry and wet N depositions were monitored from May 2010 to December 2011. Fluxes of HNO3, NH3, NO2, particulate ammonium and nitrate (pNH4+ and pNO3-) averaged at 1.47, 0.68, 0.13, 0.23 and 0.25 kg N x hm(-2) x a(-1), respectively. Wet depositions of NH(4+)-N and NO(3-)-N were 2.47 and 1.59 kg N x hm(-2) x a(-1), respectively. Total atmospheric inorganic N deposition fluxes averaged at 6.82 kg N x hm(-2) x a(-1), and the wet and dry depositions were 4.06 and 2.76 kg N x hm(-2) x a(-1), respectively. Nitrogen deposition fluxes showed a significant seasonal change, with 72.1% of dry N deposition occurring in spring and summer, and 78.3% of wet N deposition concentrating in summer and autumn.
authors.forename: Ping
authors.initials: P
authors.lastname: Yue
authors.forename: Wei
authors.initials: W
authors.lastname: Song
authors.forename: Kai-Hui
authors.initials: KH
authors.lastname: Li
authors.forename: Gui-Xiang
authors.initials: GX
authors.lastname: He
authors.forename: Xiao-Li
authors.initials: XL
authors.lastname: Wang
authors.forename: Xue-Jun
authors.initials: XJ
authors.lastname: Liu
mesh_terms: D001272:Atmosphere / Q000737:chemistry; D002681:China; D004784:Environmental Monitoring; D065948:Grassland; D009584:Nitrogen / Q000032:analysis*; D012621:Seasons
chemical_list: D009584:Nitrogen