Xu Zhe, Zhang Lin, Jiang Guangyang, Ding Xingyi, Guo Yidong, Tian Yongqiang
College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, People's Republic of China.
Key Laboratory of Leather Chemistry and Engineering, Ministry of Education, Sichuan University, Chengdu, 610065, People's Republic of China.
Environ Geochem Health. 2025 Jul 29;47(9):345. doi: 10.1007/s10653-025-02651-1.
With the extensive use of mulch films, problem of pollution by mulch film residues has become increasingly serious. Mulch film residues can affect soil physicochemical properties and enzyme activities, reduce soil quality, and may pose ecological risks. In this study, we used three different agricultural soils with different properties collected from three important agricultural production bases in China to reveal the differences in the degradation effects of low-density polyethylene (LDPE) mulch film and biodegradable mulch film (BDM) in soils under laboratory conditions. The effects of mulch film residues on soil properties and the ecotoxicology they pose to environmental were also assessed. BDM started to degrade significantly within one month and degraded fastest in the Black Soil, in which it degraded almost completely after 180 days. LDPE mulch film residues had less interference with the physicochemical properties of the soil than the BDM residues. The cation exchange capacity, total carbon and total organic carbon of the soil were less disturbed by the mulch film residues. Extracts from soils treated with both types of mulch film residues did not adversely affect Triticum aestivum L. seed germination and normal growth of Raphidocelis subcapitata and L929 cells. This study provides important data on the degradation of BDM in different soils, its impact on soil properties, and its ecotoxicological effects, and compares these findings with LDPE mulch film. The findings help advance the understanding of BDM's environmental impact and support its sustainable agricultural application.
随着地膜的广泛使用，地膜残留污染问题日益严重。地膜残留会影响土壤理化性质和酶活性，降低土壤质量，并可能带来生态风险。在本研究中，我们使用了从中国三个重要农业生产基地采集的三种性质不同的农业土壤，以揭示低密度聚乙烯（LDPE）地膜和可生物降解地膜（BDM）在实验室条件下在土壤中的降解效果差异。还评估了地膜残留对土壤性质的影响及其对环境造成的生态毒理学影响。BDM在一个月内开始显著降解，在黑土中降解最快，180天后几乎完全降解。LDPE地膜残留对土壤理化性质的干扰比BDM残留小。土壤的阳离子交换容量、总碳和总有机碳受地膜残留的干扰较小。两种地膜残留处理过的土壤提取物对小麦种子萌发以及月牙藻和L929细胞的正常生长均无不利影响。本研究提供了关于BDM在不同土壤中的降解、其对土壤性质的影响及其生态毒理学效应的重要数据，并将这些结果与LDPE地膜进行了比较。这些发现有助于增进对BDM环境影响的理解，并支持其在可持续农业中的应用。
