摘要
以山东省龙口市北马镇1000hm2的科技示范区为研究区,在地理信息系统平台ArcGIS上,采用GeostatisticalAnalyst地统计分析模块中的Kriging插值方法研究土壤养分的空间变异性。该分析过程中,发现影响分析工作结果精度的是Kriging插值模型的选择及Cross Validation交叉验证法的检验与系数修正。数据分析结果表明,龙口市北马镇0～20cm耕层土壤中碱解氮、速效钾含量空间相关性中等,速效磷含量具有强烈的空间相关性,有机质含量空间相关性较弱。
The spatial variability of soil nutrients was studied based on Kriging method handled by ArcGIS in a pilot region which located in Longkou county,Shandong Province.Choosing proper Kriging model,verifying of the Cross-Validation and correcting the parameters are important factors influcening accurate analysis. According to this study, the spatial correlations of available N and available K is moderate,the spatial correlation of available P is sharp and that of O.M.is weak.
出处
《安徽农业大学学报》
CAS
CSCD
北大核心
2004年第1期76-81,共6页
Journal of Anhui Agricultural University
基金
国家科技部生态农业技术体系研究与示范项目资助。
