National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Recourses and Environment, Shandong Agricultural University, Taian, Shandong 271018, China.
Shandong (Linyi) Institute of Modern Agriculture, Zhejiang University, Linyi, Shandong 276041, China.
Ecotoxicol Environ Saf. 2024 Sep 15;283:116826. doi: 10.1016/j.ecoenv.2024.116826. Epub 2024 Aug 5.
The utilisation of coated controlled-release fertilizers (CRFs) leads to the persistence of residual plastic films in agricultural soils, posing a potential threat to crop health. This study investigates the impacts of four residual films (0.39 %, w/w) derived from CRFs in soil, including petrochemical polyether, bio-based polyether, castor oil polyester, and wheat straw polyester polyurethane on wheat growth. This study found that PecPEUR significantly reduced wheat plant height, stem diameter, leaf area, and aboveground fresh weight by 24.8 %, 20.2 %, and 25.7 %. Through an in-depth exploration of transcriptomics and metabolomics, it has been discovered that all residual films disrupted glycolysis-related metabolic pathways in wheat roots, affecting seedling growth. Among them, PecPEUR significantly reduced the fresh weight of aboveground parts by 20.5 %. In contrast, polyester polyurethane residue had no discernible impact on aboveground wheat growth. This was attributed to the enrichment of wheat root genes in jasmonic acid and γ-aminobutyric acid metabolic pathways, thus mitigating oxidative stress, enhancing stress resistance, and ensuring normal plant growth. This study, for the first time, provides comprehensive insights into the effects of polyurethane film residue on wheat seedling growth, underscoring its potential as a promising alternative to conventional plastics in soil.
控释肥包膜的使用导致农用土壤中残留塑料薄膜的持久性，对作物健康构成潜在威胁。本研究调查了四种源自控释肥的残留薄膜（土壤中 0.39%，w/w）对小麦生长的影响，包括石油基聚醚、生物基聚醚、蓖麻油聚酯和麦秆聚酯型聚氨酯。研究发现 PecPEUR 显著降低了小麦株高、茎直径、叶面积和地上部鲜重 24.8%、20.2%和 25.7%。通过对转录组学和代谢组学的深入研究，发现所有残留薄膜均破坏了小麦根中的糖酵解相关代谢途径，影响了幼苗生长。其中 PecPEUR 显著降低了地上部鲜重 20.5%。相比之下，聚酯型聚氨酯残留对地上部小麦生长没有明显影响。这归因于小麦根中富含茉莉酸和γ-氨基丁酸代谢途径的基因，从而减轻氧化应激，增强抗逆性，确保植物正常生长。本研究首次全面深入地研究了聚氨酯薄膜残留对小麦幼苗生长的影响，强调了其作为土壤中传统塑料的有前途替代品的潜力。
