土壤中硝态氮的空间变异研究  

The Spatial Variations of NO_3^--N in Soil

作　　者：邢永强[1] 李金荣[2] 李金玲[3] 常秋玲[1] 贺传阅[1] 

机构地区：[1]河南省国土资源科学研究院,郑州450016 [2]郑州大学环境与水利学院,郑州450001 [3]河南省地质调查院,郑州450007

出　　处：《灌溉排水学报》2008年第3期106-108,共3页Journal of Irrigation and Drainage

摘　　要：对10 m×10 m面积内的100个土壤样点取样分析其硝态氮含量,用地质统计学中的区域化变量理论和半方差函数分析,研究结果表明2种含水率土壤中硝态氮含量在一定范围内均具有空间变异性,属于中等程度变异;硝态氮含量的半方差随着取样间距的增加而增加,最后趋于稳定,存在着空间变异结构,对其进行拟合,确定其变异程度及空间相关尺度。One hundred soil samplers at a plot of 10 m×10 m were made at an interval of 1 m with different soil moisture and different time. The NO3^--N in surface soil （10 to 15 cm） were measured. The author analyzed experimental data by the theory of regionalized variable theory and studied the spatial variations of NO3^--N in the field. The results showed that the NO3^--N at different soil moisture had spatial variability in a given spatial range. The semi-variances of NO3^--N were increased with the increase of the lag（h）. Fitting the results with linear regressions, the parameters of the semi-variograms were estimated, and their variable extent and space correlative scale were made.

关 键 词：硝态氮 空间变异 区域化变量 半方差分析 

分 类 号：S158[农业科学—土壤学]