江西农业大学学报2025，Vol.47Issue(6)：1443-1451,9.DOI:10.3724/aauj.2025124
不同粒径聚乙烯微塑料对玉米幼苗光合、生物量和根系特性的影响
Effects of polyethylene microplastics with different particle sizes on photosynthesis,biomass and root characteristics of maize seedlings
摘要
Abstract
[Objective]With increasing plastic pollution,microplastics have become an important issue in the global environment.Understanding the effects of microplastics on plant growth can help to assess the potential threat of plastic pollution to agro-ecosystems,especially its long-term effects on crop growth and agricultural production.This study was conducted to investigate the effects of polyethylene(PE)microplastics of different particle sizes on the growth of maize(variety:Zhengdan 958)seedlings.[Method]Through soil pot experiment,the control group(CK),small particle size(13 μm,M1)and large particle size(150 μm,M2)PE microplastic treatment group were set up,and the microplastic mass concentration was 5%.The plant height,leaf area,chlorophyll content(SPAD),biomass accumulation,root traits and plant health index(PHI)of maize were measured to comprehensively evaluate the effects of microplastics on crop growth.[Result]The results showed that the SPAD values of maize seedlings were significantly reduced by 11.52%(P<0.05)under the treatment of small-sized microplastic(P<0.05).Although M1 and M2 did not significantly change plant height and leaf area,they both contributed to biomass accumulation,which showed that the biomass of organs in maize seedlings showed a trend of M1>M2>CK(P>0.05).The enhancing effect of M1 on the total root length,root volume,and root surface area was particularly significant,with increases of 148.87%,175.78%,and 104.29%respectively(P<0.05).M1 significantly increased the PHI of maize seedlings by 50.43%(P<0.05)compared with CK,indicating that small-sized microplastics have a positive effect on the growth and health of maize seedlings.The results of principal component analysis(PCA)showed that both M1 and M2 samples were significantly separated from CK,indicating that the two microplastic treatments significantly affected the growth of maize seedlings.In addition,the plant height,leaf area,biomass of each organ,total root length,root volume and root surface area were the important driving factors affecting the growth of maize seedlings with different particle sizes of microplastics.[Conclusion]In summary,the results of this study showed that polyethylene microplastics with different particle sizes had significant effects on the growth of maize seedlings,and the effect of small particle size was stronger than that of large particle size.In the future,the cumulative effects of long-term exposure to microplastics on soil health and plant growth should be considered in order to better assess the full impact of microplastic pollution on agroecosystems.关键词
聚乙烯/微塑料/微塑料粒径/植物健康指数/根系Key words
polyethylene/microplastics/microplastic particle size/plant health index/root system分类
农业科技引用本文复制引用
殷俊,段门俊,梁超,聂江文..不同粒径聚乙烯微塑料对玉米幼苗光合、生物量和根系特性的影响[J].江西农业大学学报,2025,47(6):1443-1451,9.基金项目
国家自然科学基金项目青年科学基金(32401972)Project supported by the National Natural Science Foundation of China(32401972) 湖北省教育厅科研计划青年项目(Q20231310)、长江大学湿地生态与农业利用教育部工程研究中心开放基金项目(KF202309)和长江大学创新创业训练计划(Yz2023198)同时对本研究给予了资助,谨致谢意! （32401972）
