微塑料(MPs)是农业土壤中普遍存在的污染物,然而,关于MPs和重金属对土壤-植物系统的综合影响的研究仍然有限。本研究调查了低密度聚乙烯(LDPE)微塑料(L:1mm,S:100μm,0.1%,1%)和Cd对土壤性质的影响,可用的Cd含量,玉米生长,通过盆栽实验,mazie积累Cd。研究结果揭示了治疗组的显着影响,即MP-L0.1%,MP-S0.1%,MP-L1%,和MP-S1%,关于土壤有机碳(SOC),玉米高度,过氧化氢酶(CAT)活性(P<0.05)。MPs用量显著影响玉米株高,MP-S0.1%治疗导致5.6%的减少,而其他组的影响不明显。粒径和用量对SOC和CAT有显著影响(P<0.01)。MP-L1%和MP-S1%组导致SOC增加121.5%和281.0%,分别。CAT减少了32.6%,62.8%,41.9%,MP-L0.1%为34.9%,MP-S0.1%,MP-L1%,和MP-S1%组,个别。Cd处理导致土壤阳离子交换能力(CEC)显着降低,玉米茎直径,和根长,伴随着玉米株高的显著增加,丙二醛(MDA),CAT,和超氧化物歧化酶(SOD)活性。LDPE和Cd联合污染对玉米株高和叶片中Cd含量有显著影响。具体来说,MP-L0.1%+Cd,MP-S0.1%+Cd,MP-L1%+Cd,MP-S1%+Cd使玉米高度降低4.1%,4.5%,8.7%,和13.8%,分别。LDPE和Cd的共存增加了土壤中有效Cd的含量,同时提高了玉米芽和根中Cd的浓度。与Cd组相比,MP-L1%Cd组的玉米叶片中Cd浓度显着增加了25.5%。此外,LDPE对土壤植物系统的影响取决于粒径和剂量。这项研究为评估土壤植物环境中MP和有毒金属的并发污染和潜在危险提供了重要视角。
Microplastics (MPs) are pervasive pollutants found in agricultural soils, yet research on the combined impacts of MPs and heavy metals on soil-plant systems remains limited. This study investigates the combined impact of low-density polyethylene (LDPE) microplastics (L: 1 mm, S: 100 μm, 0.1%, 1%) and Cd on soil properties, available Cd content, maize growth, and Cd accumulation by mazie through pot experiments. The findings unveiled notable impacts of the treatment groups, namely MP-L0.1%, MP-S0.1%, MP-L1%, and MP-S1%, on soil organic carbon (SOC), maize height, and catalase (CAT) activity (P < 0.05). The dosage of MPs significantly influenced maize height, MP-S0.1% treatment resulted in a 5.6% reduction, while the other groups had insignificant effects. Particle size and dosage significantly affected SOC and CAT (P < 0.01). The MP-L1% and MP-S1% groups resulted in increases of SOC by 121.5% and 281.0%, respectively. CAT reductions were 32.6%, 62.8%, 41.9%, and 34.9% in MP-L0.1%, MP-S0.1%, MP-L1%, and MP-S1% groups, individually. The Cd treatment induced a significant decrease in soil cation exchange capacity (CEC), maize stem diameter, and root length, accompanied by significant increases in maize plant height, malondialdehyde (MDA), CAT, and superoxide dismutase (SOD) activities. Combined LDPE and Cd contamination had significant effects on maize height and Cd content in leaves. Specifically, MP-L0.1%+Cd, MP-S0.1%+Cd, MP-L1%+Cd, and MP-S1%+Cd reduced maize height by 4.1%, 4.5%, 8.7%, and 13.8%, respectively. The co-presence of LDPE and Cd increased available Cd content in soil while elevating Cd concentration in maize shoots and roots, with a notable 25.5% increase in Cd concentration in maize leaves in the MP-L1%+Cd group compared to the Cd group. Furthermore, LDPE effects on soil-plant systems varied depending on particle size and dosage. This research provides important perspectives on evaluating the concurrent contamination and potential dangers of MPs and toxic metals in soil-plant environments.