中文摘要：

在乌鲁木齐市，按不同用地类型和空间分布的均匀性，采集45个表土样品。分析了土地利用类型引起的市、郊区土壤磁性参数的差异，研究了土壤磁性参数空间变异性和分布特征，并初步探讨了其人为影响因素。结果表明：除了xm以外，市区土壤XLF、Soft IRM和HIRM均值高于郊区。研究区土壤以亚铁磁性矿物主导，并伴有少量不完全反铁磁性矿物，市区土壤超顺磁性矿物颗粒含量低于郊区。土地利用类型是导致市、郊区土壤磁性参数差异的重要因素。从变异系数看，4种磁性参数都属于中等变异程度。空间变异性分析表明，各磁性参数的最优拟合模型是球状和指数模型，变程介于15～18km之间。从Q值结果看，xⅡhSoftIRM属于高度空间变异性，XIF为中度变异性，HIRM变异程度最低。空间分布特征表明，XIF SoftIRM值基本以工业区为中心，向外围递减。XFD分布趋势大致与其他参数相反。HIRM分布呈东、西部高，中部低且向南北方向递减的趋势。人为因素是影响乌鲁木齐市土壤磁性空间变异的关键因素。

英文摘要：

In Urumqi, according to different types of land use and spatial uniformity, 45 topsoil samples were collected to analyze the effect of land use type on the soil magnetic parameters of urban and suburban areas, and spatial variability and distribution characteristics of soil magnetic parameters, meanwhile explored influence factors of spatial variability by using the magnetic measurement, statistical and geostatistical methods. The results showed that the average values of X LF, Soft IRM and HIRM in urban soil were greater than them in suburban except for the X FD. Magnetic mineralogy suggested the topsoil was dominated by ferrimagnetic minerals accompanied with a little amount of incomplete antiferromagnetic minerals. The content of superparamagnetism minerals of urban soil was less than it of suburban. Land use types were the important factors which caused soil magnetic parameters differences between the city and suburban. The coefficient of variation of four kinds of magnetic parameters indicated moderate variation. Spatial variability analysis showed that the optimal fitting models for magnetic parameters were spherical and exponential model with the range between 15-18 kin. The results of Q value showed that X FD or Soft IRM belonged to a highly spatial variability, ~ LF belonged to moderate variability, while HIRM belonged to the lowest variability. Spatial distribution characteristics indicated the high values of X LF and Soft IRM mainly were located in the industrial area as the center, decreasing gradually away from the center, while spatial distribution trends of X FD was roughly opposite with other parameters. HIRM distribution presented high in the east and west, and low in the middle area, gradually decreasing towards north and south. Human factors were the key factor that affected the spatial variability of soil properties in Urumqi.