长白山阔叶红松林土壤无机氮空间异质性  

Spatial heterogeneity of soil inorganic nitrogen in a broadleaved-Korean pine mixed forest in Changbai Mountains of Northeast China

作　　者：徐媛[1,2] 张军辉[1] 韩士杰[1] 王树堂[1] 王存国[1] 王树起[1] 

机构地区：[1]中国科学院沈阳应用生态研究所,沈阳110016 [2]中国科学院研究生院,北京100049

出　　处：《应用生态学报》2010年第7期1627-1634,共8页Chinese Journal of Applied Ecology

基　　金：中国科学院知识创新工程重要方向项目(KSCX-YW-Z-1022;KZX2-YW-416);国家自然科学基金项目(40975071;40930107)资助

摘　　要：利用地统计学方法,研究了长白山阔叶红松林内土壤表层(0～10cm)铵态氮和硝态氮的空间异质性.结果表明:长白山阔叶红松林内土壤表层铵态氮和硝态氮的半方差函数可用球状模型或高斯模型拟合.土壤表层铵态氮和硝态氮的空间分布均呈现中等程度的空间自相关,结构比范围分别在0.70%～41.47%和32.26%～52.66%;铵态氮的空间自相关尺度小于硝态氮,变程分别为8.87和9.76m.土壤表层铵态氮和硝态氮在空间上呈斑块状分布;铵态氮的空间异质性程度高于硝态氮,硝态氮与土壤水分呈显著负相关关系(r=-0.3743,P<0.05),而铵态氮与土壤水分无显著的相关关系.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.

关 键 词：阔叶红松林 铵态氮 硝态氮 空间异质性 长白山 

分 类 号：S718.5[农业科学—林学]