中文摘要：

本文通过采集崇明岛0～20、20～40cm和40～60cm的三层土壤,利用地统计学方法研究崇明岛的土壤酶和有机质的空间分布特征,为合理利用崇明岛土地和提高其土壤质量提供参考依据。研究结果表明：不同土地利用方式下,工业用地的土壤有机质含量最高,河道旁、林地和农业用地的土壤有机质含量随土壤深度增加显著减少,其中农业用地的土壤有机质含量随土壤深度的变化要小于林地和河道旁。通过半变异函数和Moran′sI函数方法研究发现,崇明岛的土壤酶空间变异主要是由随机因素引起的,异性变异以崇明岛东西走向为主,而崇明岛南北方向发生异性空间变异要小于东西方向;通过空间插值方法研究发现,土壤酶活性主要由中部的镇中心以及居民和工业区向东部的东滩湿地以及北沿农场逐渐降低,并且随土层深度增加土壤酶高活性的区域逐渐减小。

英文摘要：

The paper present spatial distribution characteristic of soil enzymes and organic matter under different land use managements using a geostatistics method, which provide the scientific basis for soil utilization and facilitate soil quality. The 0~20 cm, 20~40 cm and 40~60 cm soil layer in Chongming Island were sampled. The results showed that, under different land use management, the organic matter content was highest in industrial soil, and the organic matter content in river way, forestry and farmland decreased significantly with increasing soil depth. Through semivariogram and Moran＇sI analysis, we found that soil enzymes spatial variability in Chongming Island were mostly due to random factor, and anisotropic correlogram occur at west-east direction, in which anisotropic spatial variability was smaller from north-south than from west-east direction. Through spatial interpolation analysis, we found that soil enzymes gradually decreased from Chongming midland, living area and industrial districts to eastern wetland and northern farmland. In addition, the soil enzyme activities and high activity area gradually decreased with increasing soil depth.