The content of PAEs in field soils caused by the residual film has a periodical peak
The content of PAEs in field soils caused by the residual film has a periodical peak
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残膜造成的田间土壤PAEs含量出现周期性峰值
DOI：
10.1016/j.scitotenv.2022.161078
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发表时间：
2022
影响因子：
9.8
通讯作者：
Shi Mei
中科院分区：
文献类型：
--
作者：
Sun Qing;Zhang Xinxin;Liu Chenrui;A Nier;Ying Shan;Zhang Junxin;Zhao Yujie;Zhang Yutong;Wang Zhaohui;Shi Mei
塑料薄膜覆盖的广泛使用导致了邻苯二甲酸酯（PAEs）的释放，严重威胁土壤环境和农作物生产安全。但目前尚不清楚塑料薄膜残留物诱导土壤PAEs累积是否存在最大阈值，田间条件下土壤PAEs的动态变化也尚不清楚。针对这些问题，通过田间试验研究了地膜残留对土壤邻苯二甲酸酯含量的影响及其对土壤微生物群落结构的响应。结果表明，在一年的观察期内，土壤邻苯二甲酸酯含量呈波动趋势，冬、夏季出现周期性峰值，并随着塑料薄膜老化程度和残留量的增加而加剧。黑膜土壤中PAEs含量高于美国土壤允许标准。高通量测序分析表明，残膜的添加显著增加了细菌群落的α多样性，改变了细菌群落的结构，并对细菌功能产生了显著的干扰。此外，残膜吸收了更多与塑料膜和PAEs降解相关的微生物群。研究结果揭示了塑料薄膜残留对土壤PAEs的影响规律，对评价塑料薄膜残留对土壤和农作物的污染风险具有重要意义。
The wide use of plastic film mulch has led to the release of phthalate esters (PAEs), which seriously threatens the soil environment and the safety of crop production. However, it is unknown whether there is a maximum threshold of soil PAEs accumulation induced by plastic film residue, and the dynamic changes of soil PAEs under field conditions are still unclear. To address these issues, a field experiment was conducted to investigate the temporal fluctuations of soil PAEs content and the response of microbial community structure in the field with plastic film residue. Results showed that the content of soil PAEs fluctuated during an observation period of one year, had a periodical peak in winter and summer, and was exacerbated by the increase in the aging degree and residual amount of plastic films. The PAEs content in soil with black films was higher than the US soil allowable criteria. High-throughput sequencing analysis showed that the addition of residual film significantly increased the alpha diversity of bacterial communities, changed the structure of bacterial community, and generated significant disturbances in bacterial function. Besides, the residual film recruited more microbiota related to plastic film and PAEs degradation. Results of the present study provide insight into the dynamic variation of soil PAEs caused by plastic film residue in one year, which is important to help evaluate the pollution risk of PAEs on soils and crops caused by residual plastic film.