Nitrogen fertilizer improves Salix matsudana growth and soil qualities

Nitrogen fertilizer improves Salix matsudana growth and soil qualities

IntroductionSoil contamination with heavy metals (e.g., Pb, Cd) poses severe environmental risks due to industrialization. Salix matsudana, a metal-tolerant woody plant, shows promise for phytoremediation, yet the synergistic role of nitrogen (N) fertilization in enhancing plant growth and soil reme...

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Main Authors: Qian Wang, Xiaoyun Niu, Shuo Huang, Dongliu Di, Beibei Su, Yangchen Yuan, Yumeng Wu, Dazhuang Huang
Format: Article
Language:English
Published: Frontiers Media S.A. 2025-08-01
Series:Frontiers in Microbiology
Subjects:
Salix matsudana
phytoremediation
nitrogen fertilization
rhizosphere microorganism
metabolomic
Online Access:https://www.frontiersin.org/articles/10.3389/fmicb.2025.1631852/full
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Summary:IntroductionSoil contamination with heavy metals (e.g., Pb, Cd) poses severe environmental risks due to industrialization. Salix matsudana, a metal-tolerant woody plant, shows promise for phytoremediation, yet the synergistic role of nitrogen (N) fertilization in enhancing plant growth and soil remediation remains unclear. This study aims to elucidate how N fertilization optimizes S. matsudana’s remediation efficiency.MethodsWe applied integrated physiological and multi-omics approaches to assess N fertilization effects on S. matsudana growth, Pb/Cd uptake, and rhizosphere properties. Physiological metrics (biomass, metal accumulation) were combined with microbial community analysis (16S rRNA sequencing) and metabolomic profiling (LC-MS/GC-MS) of rhizosphere soils under varying N concentrations.ResultsHigh N levels significantly increased plant biomass and Pb/Cd accumulation. Microbial diversity shifted, with enriched metal-mobilizing taxa. Metabolomics revealed elevated organic acids, correlating with improved metal bioavailability and soil health.DiscussionN fertilization synergistically enhances phytoremediation by: (1) stimulating plant growth and metal uptake, (2) reshaping rhizosphere microbiomes for metal mobilization, and (3) promoting chelating metabolite secretion. These findings provide actionable insights for optimizing N-assisted phytoremediation strategies.
ISSN:1664-302X

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