Distribution of microplastics in soil aggregates after film mulching

Microplastic distribution is non-homogeneous in agricultural soil following plastic film degradation. However, the of microplastics by shape and particle size different aggregates remains unknown. To elucidate microplastic shapes sizes with increasing years mulching, four paired fields mulching (FM) no (NM) were examined at 1, 5, 10, 20 after continuous mulching. An increase 0.053–0.25 mm diameter was observed; however, organic carbon content decreased long-term FM. Microplastics primarily combined 0.053–2 aggregates. Specifically, FM associated dominance film- fiber-shaped 0.25–2 diameter, respectively. Fiber- granule-shaped 0.25–1 aggregates, Film-shaped > 1 0.05–0.25 Therefore, can be used to monitor health quality, greatly enhancing our understanding risk posed environment.