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中文摘要：
采用温室模拟试验,施用农业生产中广泛使用的无机氮肥和有机肥,以花红苋菜为典型叶菜类蔬菜,研究了不同施肥对老化污染土壤中PAHs可提取态浓度的影响.结果表明,有机肥处理与无机氮肥处理相比较,土壤中菲、荧蒽和苯并（b）荧蒽的可提取态浓度显著降低（p〈0.05）;在相同的采样时间及处理下,3种PAHs的可提取浓度与其在老化污染土壤中初始浓度的比值顺序为：苯并（b）荧蒽〈荧蒽〈菲（p〈0.05）,说明不同PAHs与土壤组分之间的吸附因其不同的理化特性而存在差异;裸土处理中3种PAHs的可提取浓度均显著高于根际土壤中的对应浓度（p〈0.05）.
英文摘要：
This study was conducted with amaranth as a representative leafy vegetable to elucidate the effects of application of different fertilizers such as inorganic nitrogen and organic fertilizers, which were widely used in agricultural production, on the extractable concentrations of polycyclic aromatic hydrocarbons （PAHs） in aged contaminated soil under a greenhouse incubation experiment. The results show that the extractable concentrations of phenanthrene （Phe）, fluoranthene （Fit） and benzo（b）fluoranthene （BbF） decrease significantly in organic fertilizer treatments than those in inorganic nitrogen fertilizer treatments （p 〈 0.05）. In the same sampling time and treatment, the ratios of extractable concentrations to primary concentrations in aged contaminated soil of three PAHs increase in an order, BbF 〈 Flt 〈 Phe （p 〈 0.05）, showing that the adsorption of PAHs among soil components varies clearly with their physicochemical properties. The extractable concentrations of three PAHs are significantly higher in unvegetated soil than those in rhizosphere soil （p 〈 0.05）.
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