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[目的]研究乌鲁木齐市蔬菜基地土壤有效态铅的空间变异特征。[方法]以乌鲁木齐市北郊蔬菜基地为典型区,对干旱区绿洲城市郊区土壤有效态铅含量的结构特征进行分析,得到该地区有效态铅的空间分布格局并揭示了引起这种分布格局的成因和污染来源。[结果]乌鲁木齐市北郊蔬菜基地有效态铅属中等变异。半方差函数模型拟合表明有效态铅含量可以用指数函数拟合,且在一定范围内存在空间相关性。采用Kriging最优内插法得到了有效态铅含量的空间分布格局,表明土壤有效态铅含量与工业活动、污水灌溉和大气降尘密切相关。[结论]该研究为该区域铅空间污染源的识别,污染风险评估和污染治理提供了科学依据,对于创造安全、清洁的生产环境和选择合理的蔬菜种植区具有重要意义。
[Objective] The research aimed to study the spatial variability of soil available Pb in vegetable bases in Urumqi. [Method] Taking the vegetable base in the northern suburb of Urumqi as a typical area, the structural characteristics of available lead in the suburbs of oasis urban area in arid area were analyzed. The spatial distribution pattern of available lead in the area was obtained and the distribution pattern of the lead Cause and source of pollution. [Result] The available lead species in vegetable base in northern suburb of Urumqi was moderately variant. The fitting of the semi-variance function model shows that the available lead content can be fitted by exponential function, and there is spatial correlation within a certain range. The Kriging optimal interpolation method was used to obtain the spatial distribution pattern of available Pb, indicating that the available Pb content in soil is closely related to industrial activities, sewage irrigation and atmospheric dustfall. [Conclusion] The study provided a scientific basis for the identification of lead pollution source, pollution risk assessment and pollution control in the region, which is of great significance for creating a safe and clean production environment and selecting a reasonable vegetable planting area.