生态环境学报 ›› 2023, Vol. 32 ›› Issue (11): 1964-1977.DOI: 10.16258/j.cnki.1674-5906.2023.11.007
李成涛1,*(), 吴婉晴1, 陈晨1, 张勇1,2, 张凯3
收稿日期:
2022-11-08
出版日期:
2023-11-18
发布日期:
2024-01-17
通讯作者:
*作者简介:
李成涛(1981年生),男,副教授,博士,主要研究方向为环境生物技术。E-mail: lct515@163.com
基金资助:
LI Chengtao1,*(), WU Wanqing1, CHEN Chen1, ZHANG Yong1,2, ZHANG Kai3
Received:
2022-11-08
Online:
2023-11-18
Published:
2024-01-17
摘要:
伴随着传统塑料制品引发的“白色污染”问题日益严重,可生物降解塑料应运而生,同时引发了新的可生物降解微塑料污染,但有关可生物降解微塑料对土壤生态系统以及农作物生长的毒性效应尚未完全明确。该研究以可生物降解材料聚对苯二甲酸-己二酸丁二醇酯微塑料(PBAT-MPs)为研究对象,同时以不可降解聚丙烯微塑料(PP-MPs)为对照,通过发芽试验和盆栽试验探究了微塑料填埋前后的形态变化、对土壤理化性质及上海青(Brassica chinensis L.)生长过程中生理指标的影响。结果表明,PBAT-MPs在土壤中发生了降解,而PP-MPs表面形态几乎未发生变化;PP-MPs的添加会导致土壤中TN含量的下降,TP含量先降低后升高,而PBAT-MPs会增加土壤TN含量,TP含量先降低而后恢复;两种微塑料的添加整体会增加土壤中水稳性团聚体含量,影响团聚体粒径分布;MPs对上海青产生的影响会随着植物的自身调节作用减弱,对植物生理指标的影响呈动态变化;相关性分析结果表明,PBAT-MPs处理土壤总磷与植物发芽率、根系活力、根长和茎长呈现正相关,植物丙二醛含量与发芽率、根系活力和茎长呈现负相关。与不可降解微塑料相比,可生物降解微塑料PBAT未因其自身降解而对土壤、上海青产生显著的不良效应,有希望在农业生产中代替传统不可降解农膜以减轻白色污染问题。本研究结果对评价可生物降解微塑料对土壤-植物系统的毒性效应具有重要意义。
中图分类号:
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.
LI Chengtao, WU Wanqing, CHEN Chen, ZHANG Yong, ZHANG Kai. Effects of Biodegradable PBAT Microplastics on Soil Physical and Chemical Properties and Physiological Indicators of Brassica chinensis[J]. Ecology and Environment, 2023, 32(11): 1964-1977.
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