摘要
基于GIS技术和地统计学方法,研究了1981～2006年25年来辽宁省瓦房店市北部地区5个乡镇土壤表层(0～20cm)有机质、速效磷和速效钾3个指标时空变化规律。配对t检验以及kriging插值的结果表明:25年土壤有机质的平均含量下降了8.91%,但其含量变化未达到差异性显著水平;速效磷的平均含量增加了49.94%,其含量变化差异性达到极显著水平;速效钾的平均含量增加了17.39%,其含量变化达到差异性达到显著水平。3个指标的C0(/C+C0)值1981年分别为93.6%、17.4%、85.4%;2006年分别为95.2%、93.8%、88.3%,研究结果说明了施肥等人为因素是引起土壤养分时间变化的主要原因。
The paper deals with the rule of temporal-spatial variation of three indicators- SOM, AP and AK in surface soil （0-20cm） in five towns （Wanjialing, Xutun, Tucheng, Lignan and Songshuling） of the northern part of Wafangdian, Liaoning Province in 1981 and 2006, based on the method of GIS and geo-statistics. The results of Paired samples t-test with Kriging interpolation showed that the average content of SOM declined 0.874g kg^-1, by a decrease of 8.91%, and the change did not reached the level of significant difference. The average content of AP increased 17.441mg kg^-1, by an increase of 49.94 %, and the difference of the change was extremely significant. The average content of AK increased 8.664mg kg, by an increase of 17.39 % and the change has not reached the level of significant difference. The values of C0/（C＋C0） of the SOM, AP and AK were 93.6, 17.4, and 85.4% in 1981, and 95.2, 93.8, and 88.3% in 2006 respectively. It＇s shown that the change of the measures of fertilization and cultivation and the change of land utilization due to human behave are the mainly reason that cause soil nutrient change.
出处
《土壤通报》
CAS
CSCD
北大核心
2009年第1期60-65,共6页
Chinese Journal of Soil Science
基金
大连瓦房店市土壤资源信息系统的建立横向课题
关键词
瓦房店市北部地区
GIS
地统计学
土壤养分
时空变化
The northern part of Wafangdian
GIS
Geo-statistics
Soil nutrient
Spatial and temporal variation
