title: [Spatial heterogeneity of soil inorganic nitrogen in a broadleaved-Korean pine mixed forest in Changbai Mountains of northeast China].
abstract: Geostatistic methods were applied to study the spatial heterogeneity of top soil (0 - 10 cm) ammonium N and nitrate N in a broadleaved-Korean pine mixed forest of Changbai Mountains, Northeast China. The semi-variogram of soil ammonium N and nitrate N could be well fitted by spherical or Gaussian model. The spatial distribution of soil ammonium N and nitrate N all exhibited moderate autocorrelation, with the structural ratio being 0.70% - 41.47% and 32.26% - 52.66%, and the autocorrelation degree of soil ammonium N was smaller than that of soil nitrate N, with the variation distance being 8.87 and 9.76 m, respectively. Spatially, soil ammonium N and nitrate N were distributed in patches, and the spatial heterogeneity of soil ammonium N was higher than that of soil nitrate N. There was a significant negative correlation between soil nitrate N and soil moisture content, while soil ammonium N had less correlation with soil moisture.
authors.affiliation: Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China. xy07012390@126.com
authors.forename: Yuan
authors.initials: Y
authors.lastname: Xu
authors.forename: Jun-hui
authors.initials: JH
authors.lastname: Zhang
authors.forename: Shi-jie
authors.initials: SJ
authors.lastname: Han
authors.forename: Shu-tang
authors.initials: ST
authors.lastname: Wang
authors.forename: Cun-guo
authors.initials: CG
authors.lastname: Wang
authors.forename: Shu-qi
authors.initials: SQ
authors.lastname: Wang
mesh_terms: D002681:China; D017753:Ecosystem; D009566:Nitrates / Q000032:analysis / Q000737:chemistry; D009584:Nitrogen / Q000032:analysis*; D028223:Pinus / Q000254:growth & development*; D000644:Quaternary Ammonium Compounds / Q000032:analysis / Q000737:chemistry; D012987:Soil / Q000032:analysis*; D032384:Tilia / Q000254:growth & development
chemical_list: D009566:Nitrates; D000644:Quaternary Ammonium Compounds; D012987:Soil; D009584:Nitrogen