生态环境学报2023，Vol.32Issue(11)：1964-1977,14.DOI:10.16258/j.cnki.1674-5906.2023.11.007
可生物降解PBAT微塑料对土壤理化性质及上海青生理指标的影响
Effects of Biodegradable PBAT Microplastics on Soil Physical and Chemical Properties and Physiological Indicators of Brassica chinensis
摘要
Abstract
With the increasing problem of"white pollution"caused by traditional plastic products,biodegradable plastics have emerged and given rise to new biodegradable microplastic(MPs)pollution.The toxic effects of biodegradable MPs on soil ecosystems and crop growth are poorly understood.In this study,biodegradable polybutylene terephthalate-adipate microplastics(PBAT-MPs)were used as the research object,and the non-degradable polypropylene MPs(PP-MPs)were used as control.Pot experiments were conducted to investigate the morphological changes of MPs before and after landfill,meanwhile,the effects of MPs on soil physicochemical properties and physiological indexes of Brassica chinensis L.were evaluated.The results showed that PBAT-MPs degraded in the soil,but the surface morphology of PP-MPs hardly changed.The addition of PP-MPs decreased TN content in the soil,and the TP content first decreased and then increased.The PBAT-MPs addition increased the TN content in soil,and the TP content first decreased and then recovered.The addition of the two types of MPs increased the content of water-stable aggregates and affected particle size distribution of the aggregates in soil.The effects of MPs on Brassica chinensis L.were weakened with the self-regulation of plants,and this influence on plant physiological indexes was dynamic.Correlation analysis showed that TP of soil treated with PBAT-MPs was positively correlated with plant germination rate,root activity,root length and stem length,while the MDA content was negatively correlated with germination rate,root activity and stem length.Compared with non-degradable PP-MPs,biodegradable PBAT-MPs didn't have significant adverse effects on soil and Brassica chinensis L.due to their self-degradation.It is promising to replace traditional non-degradable films in agricultural production to reduce white pollution.The results of this study are of great significance for evaluating the toxic effects of biodegradable MPs on soil-plant system.关键词
聚对苯二甲酸-己二酸丁二醇酯/微塑料/土壤/生物降解/植种子发芽/幼苗生长Key words
polybutylene terephthalate-adipate/microplastics/soil/biodegradation/physical and chemical properties of soil/seed germination/seedling growth分类
资源环境引用本文复制引用
李成涛,吴婉晴,陈晨,张勇,张凯..可生物降解PBAT微塑料对土壤理化性质及上海青生理指标的影响[J].生态环境学报,2023,32(11):1964-1977,14.基金项目
西安市社会发展科技创新示范项目(21SFSF0005) （21SFSF0005）
陕西省重点研发计划项目(2020NY-115) （2020NY-115）
