Xu Yuan, Zhang Jun-hui, Han Shi-jie, Wang Shu-tang, Wang Cun-guo, Wang Shu-qi
Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
Ying Yong Sheng Tai Xue Bao. 2010 Jul;21(7):1627-34.
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.
运用地统计学方法研究了中国东北长白山阔叶红松混交林表层土壤（0 - 10 cm）铵态氮和硝态氮的空间异质性。土壤铵态氮和硝态氮的半变异函数可用球状模型或高斯模型较好拟合。土壤铵态氮和硝态氮的空间分布均表现出中等程度的自相关性，结构比例分别为0.70% - 41.47%和32.26% - 52.66%，且土壤铵态氮的自相关程度小于土壤硝态氮，变程分别为8.87 m和9.76 m。在空间上，土壤铵态氮和硝态氮呈斑块状分布，土壤铵态氮的空间异质性高于土壤硝态氮。土壤硝态氮与土壤含水量之间存在显著负相关，而土壤铵态氮与土壤水分的相关性较小。
