【作者】 包亮； 王耀强； 周海蓉； 徐爱国；

【Author】 Bao liang~1 Wang Yaoqiang~1 Zhou Hairong~1 Xu Aiguo~2 (1.Inner Mongolia Agriculture University,Ecology and Environment College; 2.Inner Mongolia Agriculture University,Water Conservancy and Civil Engineering College; 3.Chinese Academy of Agricultural Sciences,Agricultural Resources and Regional Planning Institute)

【机构】 内蒙古农业大学生态环境学院； 内蒙古农业大学水利与土木建筑工程学院； 中国农科院农业资源与区划研究所；

【摘要】 运用地统计学与 GIS 结合的方法初步研究了河南省许昌县的土壤养分(pH、P、K、有机质)的时空变异情况,发现河南省许昌县土壤 pH、速效磷、速效钾具有强烈的空间变异性,有机质中等空间变异。与80年代相比,2001年土壤有机质含量和分布的变化不大。速效钾有所减少致使该地区中等含量速效钾土壤所占面积最大。速效磷含量普遍减少导致该地区土壤速效磷以中等和较缺乏等级为主,这与该地区常年种植的作物一级耕作制度有关,应该采取必要措施阻止速效磷的进一步减少。更多还原

【Abstract】 In this study,the spatial-temporal variability of soil nutrients in XuChang county was analyzed by Geostatistics method in the GS~+ software environment.The result showing:there is intense space variability among soil pH,available phosphorus and available potassium,the organic matter has the medium spatial variability.Compared to 1980s,the contention and distribution of organic matter is almost same in 2001,available potassium generally reduced,this lead to the soil of medium available potassium content take the most part.The available phosphorus is generally reduced,this make the soil of the middle and lesser grade available phosphorus content take the biggest area in 2001,the reason of this phenomena maybe has relation with the always Same farming system in Xuchang region,it suggests that some useful measures should be taken to avoid this situation deteriorate moreover.更多还原