摘要
利用地统计学方法结合GIS空间分析技术，对徐州市城区表层土壤（0-10cm）pH的空间变异特征进行了深入研究。结果表明，土壤pH变幅为6．47～8．48，不同区域差异较大。数据组服从正态分布，半方差函数的最佳理论模型为球状模型，块金系数为21％，变程9500m。由市中心向外，土壤pH呈低一高一低变化。自然因素对土壤酸碱度起主导作用，但人为因素的影响已较为明显。
Variation of soil pH value which reflected soil quality was investigated based on a soil survey involving soil sampling and analysis in urban area of Xuzhou during the period from Sept. 25 to Oct.5, 2010. Geo-statistics incorporated with GIS spatial technology was applied to analysis of the spatial variability of pH values ranging from 6.47 to 8.48 over the study area. The results showed that soil pH dataset was basically congruent with the normal distribution, and the semi- variogram could be best depicted by the spherical model with nugget/still ratio of 21% and the spatial heterogeneity of 9 500 m. In general, soil pH spatial distribution was characterized by an outward trend of low-high-low from the central part of the city, implying the influences of human activities though still less than the natural ones.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2013年第8期77-80,共4页
Environmental Science & Technology
基金
国家自然科学基金项目资助(20977040)
