College of Life Sciences, Anhui Normal University, Wuhu, 241000, China.
Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China.
Chemosphere. 2019 Jun;224:265-271. doi: 10.1016/j.chemosphere.2019.02.148. Epub 2019 Feb 23.
Two common organic wastes from agriculture (rice straw) and forestry (sawdust) were applied to a petroleum-contaminated soil to estimate their effectiveness in the removal of total petroleum hydrocarbons (TPHs) and polycyclic aromatic hydrocarbons (PAHs). Rice straw was the more effective amendment than the other treatments in reducing TPH contents and addition of sawdust resulted in a significant decrease in PAH removal, particularly high-molecular-weight (5-6 ring) PAHs. Principal coordinates analysis (PCoA) indicates that rice straw treatment separated only the bacterial community but sawdust greatly affected both the soil bacterial and fungal communities. Moreover, the abundance of some petroleum degraders such as the bacteria Sphingomonas, Idiomarina and Phenylobacterium and the fungi Humicola, Wallemia and Graphium was promoted by inputs of the two agricultural and forestry wastes. These results highlight the potential of waste applications in accelerating hydrocarbon biodegradation which may be attributed to the enrichment of keystone taxa that show strong positive associations with hydrocarbon degradation.
两种常见的农业有机废弃物（稻草）和林业有机废弃物（木屑）被应用于受石油污染的土壤中，以评估它们在去除总石油烃（TPH）和多环芳烃（PAH）方面的有效性。稻草比其他处理方法更有效地减少 TPH 含量，而添加木屑会导致 PAH 去除显著减少，特别是高分子量（5-6 环）PAH。主坐标分析（PCoA）表明，稻草处理仅分离了细菌群落，但木屑极大地影响了土壤细菌和真菌群落。此外，一些石油降解菌的丰度如 Sphingomonas、Idiomarina 和 Phenylobacterium 以及真菌如 Humicola、Wallemia 和 Graphium 因两种农业和林业废弃物的投入而增加。这些结果突出了废物应用在加速烃类生物降解方面的潜力，这可能归因于与烃类降解具有强烈正相关关系的关键类群的富集。
