Abstract Petroleum pollution is a global problem that requires effective and accessible remediation strategies that takes ecosystem functioning into serious consideration. Bioremediation can be an effective tool to address the challenge. In this study, we used a mesocosm experiment to evaluate the effects of locally sourced and community produced biochar and compost amendments on diesel-contaminated soil. At the end of the 90-day experiment, we quantified the effects of the amendments on total petroleum hydrocarbons (C9-C40) (TPH) and soil pH, organic matter, aggregate stability, soil respiration, extractable phosphorus, extractable potassium, and micronutrients (Mg, Fe, Mn, and Zn). We observed significantly higher TPH degradation in compost-amended soils than in controls and soils amended with biochar. We propose that the addition of compost improved TPH biodegradation by augmenting soil nutrient content and microbial activity. Our results suggest that community-accessible compost can improve TPH biodegradation, and that implementation is possible at the community level.

中文翻译：

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社区可及的生物炭和堆肥对柴油污染土壤的影响

摘要 石油污染是一个全球性问题，需要有效且可访问的修复策略，并认真考虑生态系统功能。生物修复可以成为应对挑战的有效工具。在这项研究中，我们使用中观实验来评估本地来源和社区生产的生物炭和堆肥改良剂对柴油污染土壤的影响。在为期 90 天的实验结束时，我们量化了这些改良剂对总石油烃 (C9-C40) (TPH) 和土壤 pH 值、有机质、团聚体稳定性、土壤呼吸、可提取磷、可提取钾和微量营养素的影响（镁、铁、锰和锌）。我们观察到堆肥改良土壤中的 TPH 降解明显高于对照和用生物炭改良的土壤。我们建议添加堆肥通过增加土壤养分含量和微生物活性来改善 TPH 生物降解。我们的结果表明，社区可获得的堆肥可以改善 TPH 生物降解，并且可以在社区层面实施。