中文摘要：

目的研究兰州市蔬菜基地土壤和蔬菜体内的铅（Pb）含量，了解蔬菜的Pb富集水平，为无公害蔬菜基地建设和Pb污染控制提供理论依据。方法于2008年4和7月，在兰州市A县、B县、C县和A区、B区、C区、D区、E区共8个蔬菜基地，采集土豆、茄子、西红柿、辣椒、豆角、白菜和大葱7种蔬菜，同时对应蔬菜样品分别采集0．20cm和20～40cm深度的土壤样品，测定土壤和蔬菜中的Pb含量。结果兰州市各蔬菜基地土壤中的Pb含量均未超标。B区、C区、D区和A县的西红柿，E区的辣椒，B县的白菜，C县的西红柿、茄子、豆角和白菜未超标，其余几种蔬菜的Pb含量均超标。同一蔬菜基地7种蔬菜体内的Pb含量差异有统计学意义（P〈0．05）。兰州市C区蔬菜基地的茄子、辣椒和大葱体内的Pb含量明显高于其他各区（P〈0．05），C县的豆角和白菜体内的Pb含量最低（P〈0．05）。每种蔬菜体内的Pb含量在不同蔬菜基地之间的差异有统计学意义（P〈0．05），蔬菜体内Pb含量与土壤Pb含量呈显著正相关性（P〈0．05）。结论本次调查的兰州市区蔬菜基地蔬菜体内的Ph污染较严重。大葱对土壤中的Pb具有较强的富集能力，而西红柿的富集能力最弱。

英文摘要：

Objective To study lead- （Pb） pollutionofsoil and cumulative level of Pb in vegetables growing in vegetable base of Lanzhou. The results were helpful to the construction of safe vegetable base of Lanzhou city and control of heavy metal pollution. Methods The data of Pb contents were gain by measurements and investigation of plants and soil, the data were analyzed through one-way analysis of variance （ANOVA） and multiple comparison tests to determine the statistical significance of the differences. Results The lead level in soil of the vegetable bases was lower than the related standard limit. The Pb content in Solarium tuberosum, S. melongena, Lycopersicon eslentum, Capsim annuum, Phaseolus vulgaris, Beassica pekinensis and A llium fistulosum in vegetable base of Lanzhou showed significant differences. The Pb content of A lliumfistulosum was significantly higher than that of the other vegetables, Lycopersicon eslentum was the lowest. The Pb content of vegetables and soil showed positive correlation. Conclusion Alliumfistulosum and Lycopersicon eslentum has the highest and lowest cumulative ability of lead respectively. There is severe Pb pollution in vegetables in vegetable base of Lanzhou.