Work

Antagonistic Effect of Microplastic Polyvinyl Chloride and Nitrification Inhibitor on Soil Nitrous Oxide Emission: An Overlooked Risk of Microplastic to the Agrochemical Effectiveness

Year: 2024

Type: article

Abstract: Microplastics are widely persistent in agricultural ecosystems and may affect soil nitrous oxide (N 2 O) emissions. Nitrification inhibitor 3,4-dimethylpyrazole phosphate (DMPP) is applied to decelerate nitrification and reduce soil N 2 O emission. Nevertheless, the interactive effects of nitrification inhibitors and microplastics on soil N 2 O emissions have not been investigated. Sole DMPP, polyvinyl chloride (PVC), and polystyrene (PS) substantially reduced agricultural soil N 2 O emission rates by 25.93%, 69.04%, and 73.89%, respectively. Nevertheless, PVC and DMPP had antagonistic effects on the N 2 O emission rates. The observed reductions in N 2 O emissions could be attributed to variations in soil oxygen availability, electron transport system activities, and Firmicutes, nap, and GDH genes. Moreover, the DMPP, PVC, and PS alone or copresences significantly enhanced the soil ecosystem multifunctionality (EMF). The findings shed light on the role of microplastics in soil N 2 O emission, EMF, and the microbial community, expanding the understanding of microplastics’ effects on agrochemical effectiveness.

Source: Journal of Agricultural and Food Chemistry

DOI: 10.1021/acs.jafc.4c06528

Authors: Bin Ma, Iman Tahmasbian, Tao Guo, Minzhe Zhou, Wenhui Tang, Manyun Zhang

Institutions: Hunan Agricultural University, Griffith University, Queensland Government, Department of Primary Industries

Language: English

Topic: Microplastics and Plastic Pollution

Subfield: Pollution

Field: Environmental Science

Domain: Physical Sciences

SDGs: Life on land, Climate action

Open Access status: green

Funders: National Natural Science Foundation of China, Hunan Agricultural University