Manure-residue co-application drives SOC sequestration through differential microbial strategist selection

verfasst von

Fan Huang, Hailun Wang, Sajjad Raza, Kazem Zamanian, Yinku Liang, Xiaoning Zhao

Abstract

This study investigated how fertilizer affects microbial communities and carbon storage in soils with contrasting organic carbon levels (16.3 % vs. 1 % SOC). Soils were incubated for 67 days (25°C, 60 % water-filled pores) under four treatments: (NH₄)₂SO₄, manure, (NH₄)₂SO₄ with garlic stalk (RGS), and manure with RGS. The results reveal that alone (NH₄)₂SO₄ increased Proteobacteria relative abundance by 129 % (significantly higher than alone manure's 51 %) in high SOC soil (16.3 %). Manure combined with RGS enhanced K-strategists (+33 %), reduced r/K ratio, stabilized carbon pools, and achieved the highest SOC increment (+21 mg g⁻¹). In low SOC soil (1 %), RGS amended treatments triggered explosive growth of Firmicutes (+382–615 %), amplified r-strategists (+13 %) with elevated r/K ratios (39−47), driving soil organic carbon accumulation (+25 mg g⁻¹). The findings demonstrate that coordinated manure application with residues optimizes soil carbon through divergent microbial strategies - reinforcing K-strategists for carbon stabilization in high-SOC soils while activating r-strategists for carbon formation in low-SOC soils, achieving soil carbon pool enhancement.

Organisationseinheit(en)

Institut für Erdsystemwissenschaften

Externe Organisation(en)

Shaanxi University of Science and Technology
Hunan Women’s University (HWU)
University of Nottingham

Typ

Artikel

Journal

Environmental Technology and Innovation

Band

38

ISSN

2352-1864

Publikationsdatum

25.02.2025

Publikationsstatus

Elektronisch veröffentlicht (E-Pub)

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Allgemeine Umweltwissenschaft, Bodenkunde, Pflanzenkunde

Ziele für nachhaltige Entwicklung

SDG 2 – Kein Hunger

Elektronische Version(en)

https://doi.org/10.1016/j.eti.2025.104109 (Zugang: Offen)