中文摘要：

运用地理信息系统和地统计学相结合的方法研究了20年来吉林省公主岭地区土壤主要养分指标-有机质、速效氮、速效磷、速效钾的时空变异规律。结果表明，20年来除了速效磷含量增加外，有机质、速效氮、速效钾含量都有所降低。2000年速效磷的变异最大，其次是有机质、速效钾、速效氮；1980年变异最大的是速效磷，其次是速效氮、速效钾、有机质。这主要是人为管理及施肥差异造成的。

英文摘要：

Geographical information system （GIS） combined with, Geostatistics was applied to reveal the spatio-temporal variability of soil nutrients i. e. , organic matter,available N available P and available K in Gongzhuling area of Jilin province during twenty years. The results showed that the average content of organic matter, available N available K decreased except for available P. The great difference of nutrients is available P and the less differences are organic matter, available K and available N in 2000. The great difference was available P; the less differences were available N, available K and organic matter in 1980. The reason was mainly contributed to the application of fertilizers and the people management.