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石油污染盐碱土壤的淋洗施肥修复

Keywords: 石油污染盐碱土壤,淋洗,施肥,修复,最大或然数,Biolog

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Abstract:

采用淋洗施肥修复方法处理石油污染盐碱土壤,评价该修复方法对石油污染盐碱土壤的修复效果,并且采用最大或然数法和Biolog方法对土壤微生物数量和微生物群落水平生理特性进行研究。结果表明,经过182d的培养,淋洗施肥处理中油和脂的降解率分别比对照处理和施肥处理高(19.7±4.3)%和(13.8±3.4)%,土壤盐分去除率分别比对照处理和施肥处理高(66.5±2.9)%和(41.3±6.2)%,说明该处理是一种修复石油污染盐碱土壤的有效方式。淋洗施肥处理明显提高异养细菌、石油烃降解菌、烷烃降解菌和多环芳烃降解菌数量和土壤微生物活性,促进了微生物对土壤中油和脂的降解。此外,淋洗施肥处理提高了土壤微生物Shannon多样性指数和Simpson指数,促进了微生物种群的稳定,这暗示着土壤微生物种群正在逐渐恢复。

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