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《Resources and Environment in the Yangtze Basin》 2006-06
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SPATIAL AND TEMPORAL VARIABILITY OF SOIL ACIDITY IN TYPICAL AREAS OF TAIHU LAKE REGION IN THE LAST 20 YEARS

LIU Fu-cheng~1,SHI Xue-zheng~2,YU Dong-sheng~2(1.Department of Spatial Information Science,Huaihai Institute of Technology,Lianyungang 222001,China;2.Institute of Soil Science,The Chinese Academy of Sciences,Nanjing 210008,China)  
A geo-statistic method in combination with GIS was applied to characterize and map the spatial-temporal variability of soil pH in the typical area of Taihu Lake Region.The soil of the studied area appeared to be acid with about 85% of the total area showing a trend of decline in soil pH and its average decline extent being about 0.56 pH units.Since the Second Soil Survey,the soil pH spatial auto-correlation has become stronger and its auto-correlated distance has turned shorter,indicating that the soil pH distribution pattern has become complex.Based on the background information,it could be deduced that these changes had resulted from continual application of chemical fertilizers and large amount of acidic waste materials discharged from factories over last 20 years.
【Fund】: 国家重点基础研究规划项目(G1999011810);; 淮海工学院自然科学基金和科研启动基金项目资助
【CateGory Index】: X53
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