Manure-residue co-application drives SOC sequestration through differential microbial strategist selection
- authored by
- 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.
- Organisation(s)
-
Institute of Earth System Sciences
- External Organisation(s)
-
Shaanxi University of Science and Technology
Hunan Women’s University (HWU)
University of Nottingham
- Type
- Article
- Journal
- Environmental Technology and Innovation
- Volume
- 38
- ISSN
- 2352-1864
- Publication date
- 25.02.2025
- Publication status
- E-pub ahead of print
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- General Environmental Science, Soil Science, Plant Science
- Sustainable Development Goals
- SDG 2 - Zero Hunger
- Electronic version(s)
-
https://doi.org/10.1016/j.eti.2025.104109 (Access:
Open)
