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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.
The spatial heterogeneity of ammonium nitrogen and nitrate nitrogen in the soil surface (0 ~ 10cm) in the broad-leaved Korean pine forest in Changbai Mountains was studied by means of geostatistics.The results showed that the contents of ammonium nitrogen The semivariance function of nitrogen can be fitted by spherical model or Gaussian model.The spatial distribution of ammonium nitrogen and nitrate nitrogen in soil surface shows medium spatial autocorrelation with the range of structure ratio ranging from 0.70% to 41.47% and 32.26% 52.66% respectively. The spatial autocorrelation scale of ammonium nitrogen is smaller than that of nitrate nitrogen, and the variation ranges are 8.87 and 9.76m respectively. The distributions of ammonium nitrogen and nitrate nitrogen in soil are patchy in space. The spatial heterogeneity of ammonium nitrogen There was a significant negative correlation between nitrate nitrogen and soil moisture (r = -0.3743, P <0.05), while there was no significant correlation between ammonium nitrogen and soil moisture.