污水灌溉作为缓解水资源匮乏地区农业用水紧张和实现污水资源化利用的有效途径,其所带来的环境问题、粮食安全问题、可持续发展问题等一系列科学和社会经济问题正得到人们越来越多的关注.选取小店区山前地带用清水灌溉的农田土壤作为背景点,以该点的7种重金属含量作为评价标准对研究区耕作层0～20 cm,20～40 cm,40～60 cm,60～100 cm等4个深度的土壤进行综合评价.根据评价结果对研究区的农田进行了土壤质量分级,划分为安全、警戒限、轻污染、中污染、重污染等5个等级.研究成果对于太原市污水的科学管理、污水的资源化利用、水资源的合理配置和农产品的安全生产具有重要的指导意义.%Sewage irrigation is an effective way to alleviate the shortage of irrigated water and recycle municipal sewage. A series of scientific, social and economical problems caused by sewage irrigation, such as environmental, food security and sustainable development etc. , are getting more concerns. The soil of freshwater irrigated farmland in piedmont of Xiaodian district is chosen as the control spot. The content of the seven heavy metals in control spot is used as the assessment standard. The soil in the depth of 0~20 cm, 20~40 cm, 40~60 cm, 60~100 cm is evaluated. Five grades (security, warning, light pollution, median pollution, serious pollution) are classified according to the assessment results. Therefore, the pollution status evaluation of the soil and wastewater is of great significance on guiding the scientific management, reusing for municipal sewage, rational allocation of resource and crops security.
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