Intensive use of low-density polyethylene (LDPE) plastic films in agro-ecosystems has raised considerable concerns due to the increasing film residues in soils. It is unclear how the increased film residues affect soil properties and crop productivity and whether biodegradable (Bio) film can substitute LDPE. To address the issue, we designed a landfill experiment with different addition levels of plastic residue into soils of maize (Zea mays L.) field from 2018 to 2019. Six treatments were arranged as PMT1-T3/BioT1-T3, representing the low, medium, and high-level application of LDPE / Bio film fragments, with no residual film, applied as CK. Results show that, soil bulk density was significantly increased from 1.19 to 1.31 g/cm³ regardless of residue types. In contrast, soil porosity was lowered from 58.03% in CK to 57.36% in Bio and 56.12% in LDPE significantly (P<0.05). Increased residues improved soil nitrogen level and lowered the C/N ratio significantly. Also, it decreased microbial biomass C and N levels but with no change in C/N (P<0.05). Maize yield and WUE decreased, while soil water storage increased significantly. LDPE residues affected soil properties and productivity partly lower than Bio ones did, but the negative effects of them were similar in the maize field.

由于土壤中薄膜残留量的增加，在农业生态系统中大量使用低密度聚乙烯（LDPE）塑料薄膜引起了相当大的关注。尚不清楚增加的薄膜残留物如何影响土壤特性和农作物生产力，以及可生物降解的薄膜是否可以替代LDPE。为了解决这个问题，我们设计了一个垃圾填埋场实验，从2018年到2019年向玉米（Zea mays L.）田地土壤中添加了不同含量的塑料残渣。安排了6种处理方法，分别是PMT1-T3 / BioT1-T3，代表低，中等和高水平应用的LDPE /生物膜片段，无残留膜，用作CK。结果表明，土壤容重从1.19  g / cm ³显着增加到1.31 g / cm ³无论残留物类型如何。相比之下，土壤孔隙度从CK的58.03％降至Bio的57.36％和LDPE的56.12％（P <0.05）。增加的残留物改善了土壤氮含量，并显着降低了碳氮比。而且，它降低了微生物生物量的碳和氮水平，但碳/氮没有变化（P <0.05）。玉米产量和水分利用效率下降，而土壤水分存储显着增加。LDPE残留物对土壤特性和生产力的影响部分低于生物残留物，但其负面影响在玉米田中相似。