摘要
生态系统中生物或非生物因子在空间分布上普遍具有空间异质性。本文应用地统计学的基本原理与方法（半方差分析和无偏插值）对研究区域内的草原土壤有机碳（ＳＯＣ）和全氮（ＴＮ）空间异质性进行了分析。研究结果表明：ＳＯＣ和ＴＮ的平均含量分别为１．５５５％和０．１３３３％，平均变异系数分别为１１．２％和１２．４％，二者在空间分布方面均具有明显的空间相关性，其空间相关尺度分别为８．１９ｍ和８．６９ｍ。在此基础上，应用空间局部内插法，绘制了两个因子的空间等值分布图。
The spatial distribution of bio and abiotic factors in ecosystem has the features of spatial heterogeneity in general. In this paper, the spatial heterogeneity of soil organic carbon and total nitrogen was examined using geostatistical tools, such as variograms, kriging. The means of the SOC and the TN were 1 555% and 0 1333% respectively with variance coefficient of 11 2% and 12 7% respectively. The two properties of soil were found spatially dependent significantly and their range of spatial dependence were 8 19m, 8 69m, respectively. With the kriging in the area of sampling,the contour maps for soil organic carbon and total nitrogen were drawn also.
出处
《植物生态学报》
CAS
CSCD
北大核心
1998年第5期409-414,共6页
Chinese Journal of Plant Ecology
基金
中国科学院生物科学与技术特支费
中国科学院内蒙古草原生态系统定位研究站基金
关键词
地统计学
空间异质性
土壤
有机碳
氮素
草原
Geostatistics,Spatial heterogeneity,Soil organic carbon,Total nitrogen
