title: [Effects of simulated nitrogen deposition on soil available nitrogen forms and their contents in typical temperate forest stands].
abstract: An indoor experiment was conducted to study the effects of simulated nitrogen deposition on the soil available N in typical temperate forest stands. During the experiment period, nitrogen deposition increased the soil NH4+ -N, NO3- -N, and available N contents, as compared with the control, but the increments differed with stand types, soil layers, nitrogen treatment types, and treatment duration. Mixed forest soil had weaker responses in its available N contents to the nitrogen deposition than broad-leaved forest soil but stronger responses than artificially pure coniferous forest soil, and soil A horizon was more sensitive to nitrogen deposition than soil B horizon. Ammonium nitrogen deposition had larger effects on soil NH4+ -N content, nitrate nitrogen deposition had larger effects on soil NO3- -N content, while mixed ammonium and nitrate nitrogen deposition increased the contents of both soil NH4+ -N and soil NO3- -N, and the increments were higher than those of ammonium nitrogen deposition and nitrate nitrogen deposition, suggesting the additive effects of the mixed ammonium and nitrate nitrogen deposition on the forest soil available N.
authors.affiliation: College of Forestry, Northeast Forestry University, Harbin 150040, China. lxchen88@163.com
authors.forename: Li-xin
authors.initials: LX
authors.lastname: Chen
authors.forename: Wen-biao
authors.initials: WB
authors.lastname: Duan
mesh_terms: D002681:China; D003198:Computer Simulation; D017753:Ecosystem; D009566:Nitrates / Q000032:analysis / Q000737:chemistry; D009584:Nitrogen / Q000032:analysis / Q000737:chemistry / Q000494:pharmacology*; D000644:Quaternary Ammonium Compounds / Q000032:analysis / Q000737:chemistry; D012987:Soil / Q000032:analysis*; D014197:Trees / Q000254:growth & development*
chemical_list: D009566:Nitrates; D000644:Quaternary Ammonium Compounds; D012987:Soil; D009584:Nitrogen