Evaluation of agricultural non-point source pollution infiltration on clogging and nitrogen leaching effects in BRCs with different plants in dryland areas.

Autor: Zhang S; College of Landscape Architecture and Arts, Northwest A&F University, Yangling, 712100, PR China., Ma L; College of Landscape Architecture and Arts, Northwest A&F University, Yangling, 712100, PR China., Gao T; College of Landscape Architecture and Arts, Northwest A&F University, Yangling, 712100, PR China., Fu X; College of Landscape Architecture and Arts, Northwest A&F University, Yangling, 712100, PR China. Electronic address: fuxinuc@outlook.com., Zhang B; College of Landscape Architecture and Arts, Northwest A&F University, Yangling, 712100, PR China. Electronic address: zhangbei94@nwafu.edu.cn.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2024 Nov; Vol. 368, pp. 143750. Date of Electronic Publication: 2024 Nov 20.
DOI: 10.1016/j.chemosphere.2024.143750
Abstrakt: As high-standard farmland rapidly expands, agricultural non-point source pollution has emerged as a main environmental issue in China. To tackle nitrogen pollution, green infrastructure (GI), especially bioretention cells (BRCs), has been extensively adopted. However, the long-term effectiveness of these systems may be hindered by clogging and nitrogen leaching. In this study, we designed three BRCs simulation devices to investigate the effects of different plants on the removal of TSS TN and NO 3 -N from runoff through simulated pollutant infiltration experiments. To address this issue, laboratory research has explored the contributions of woody plants like Buxus and herbaceous plants such as Ophiopogon in BRCs, concentrating on their impact on system clogging and nitrogen leaching. The results indicated that, although the total suspended solids (TSS) removal rates in the Buxus and Ophiopogon treatment groups were slightly lower than in the control group, permeability experienced a notable enhancement, with the Buxus group showing a 24.47% increase in permeability. The removal rates of TN and NO 3 -N in the Buxus group were significantly reduced, decreasing by 31.82% and 41.25%, respectively, in comparison to the control group. After five months, Ophiopogon demonstrated considerably better root growth, with its root length, volume, and surface area all significantly exceeding those of the Buxus group. The choice of plants significantly influenced nitrogen cycling and system clogging, with the reduced removal rates in the Buxus group potentially linked to its weaker root system, lower abundance of actinomycetes, and reduced soil enzyme activity.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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Databáze: MEDLINE
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