Hydrochar and microplastics disturb soil dissolved organic matter and prominently mitigate ammonia volatilization from wheat growing soil

Y. Feng; S. Chen; L. Han; B. Wang; H. Sun; W. Xie; Q. Lu; G.E.J. Poinern; L. Xue

doi:10.1016/j.apsoil.2022.104552

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Hydrochar and microplastics disturb soil dissolved organic matter and prominently mitigate ammonia volatilization from wheat growing soil

Journal article

Peer reviewed

Hydrochar and microplastics disturb soil dissolved organic matter and prominently mitigate ammonia volatilization from wheat growing soil

Y. Feng, S. Chen, L. Han, B. Wang, H. Sun, W. Xie, Q. Lu, Y. Feng, G.E.J. Poinern and L. Xue

Applied Soil Ecology, Vol.178, Art. 104552

2022

DOI: https://doi.org/10.1016/j.apsoil.2022.104552

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Abstract

The impacts of microplastics (MPs) pollution on the nitrogen (N) cycle in soil ecosystems have attracted worldwide attention. Meanwhile, dissolved organic matter (DOM)-rich hydrochar (HBC) is being tried as an emerging soil conditioner for gaseous N reduction load to the atmosphere. However, the influence of MPs and HBC on soil DOM and ammonia (NH3) volatilization in wheat soils remains poorly understood. In this study, a soil column experiment was established in wheat growing soils to determine the impacts of HBC, MPs (i.e., polyethylene and polyacrylonitrile), and the co-occurrence of HBC and MPs (HBC + MPs) on soil NH3 volatilization, physicochemical properties and wheat growth. In comparison with the control (CK, without MPs or HBC), HBC, MPs, and HBC + MPs reduced cumulative NH3 volatilization by 45.4%, 66.7–67.4% and 29.8–58.7%, respectively. Soil DOM fulvic acid-like and humic aid substance abundances of the other treatments were increased by 18.5–56.2% and 12.7–39.3%, respectively, compared to CK. Besides, soil NH3 fluxes were positively correlated to soil NH4+-N concentration at basal fertilization and soil NO3−-N concentration at first supplementary fertilization. HBC, MPs and HBC + MPs treatments promoted soil urease activity and plant N uptake by 6.5–24.2% and 31.9–74.3%, respectively, compared to CK. This study provides an insight into the variation of NH3 volatilization caused by anthropogenic carbon in wheat soil ecosystems.

Details

Title: Hydrochar and microplastics disturb soil dissolved organic matter and prominently mitigate ammonia volatilization from wheat growing soil
Authors/Creators: Y. Feng (Author/Creator) - Ministry of Agriculture and Rural Affairs
S. Chen (Author/Creator)
L. Han (Author/Creator)
B. Wang (Author/Creator)
H. Sun (Author/Creator)
W. Xie (Author/Creator)
Q. Lu (Author/Creator)
Y. Feng (Author/Creator) - Ministry of Agriculture and Rural Affairs
G.E.J. Poinern (Author/Creator)
L. Xue (Author/Creator)
Publication Details: Applied Soil Ecology, Vol.178, Art. 104552
Publisher: Elsevier BV
Identifiers: 991005542713307891
Copyright: © 2022 Elsevier B.V.
Murdoch Affiliation: Murdoch Applied Nanotechnology Research Group
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Citation topics: 3 Agriculture, Environment & Ecology; 3.60 Herbicides, Pesticides & Ground Poisoning; 3.60.2078 Microplastics
Web Of Science research areas: Soil Science
ESI research areas: Agricultural Sciences