Contrasting response of fungal versus bacterial residue accumulation within soil aggregates to long-term fertilization

• Published in: Scientific reports 2022-10, Vol.12 (1), p.17834-17834, Article 17834
• Main Authors: Xu, Yingde, Sun, Liangjie, Gao, Xiaodan, Wang, Jingkuan
• Format: Article
• Language: English
• Subjects: 631/158/47; 704/158/47; 704/47/4113; Accumulation; Aggregates; Agrochemicals; Amino Sugars; Bacteria; Biomarkers; Carbon; Carbon cycle; Community structure; Fertilization; Fertilizers - analysis; Glucosamine; Humanities and Social Sciences; Lipids; Manure; Microbial activity; Microorganisms; multidisciplinary; Muramic Acids; Organic soils; Residues; Science; Science (multidisciplinary); Soil - chemistry; Soil aggregates; Soil Microbiology; Soil microorganisms; Soils; Spatial distribution
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-022-22064-9

Soil microorganisms are critical for soil carbon (C) cycling. They primarily regulate the turnover of the soil organic C (SOC) by adjusting their community structure, and contributing residues with a considerable amount to the resistant SOC. Nevertheless, how long-term fertilization (e.g., the combination of manure and chemical fertilizer) affects the spatial distribution of both living microbial communities and dead microbial residue within soil aggregate fractions remains largely unclear. In this study, we analyzed changes in microbial community (lipid biomarkers) and microbial residue retention (amino sugar biomarkers), and also calculated the contribution of microbial residue to organic C in bulk soil and different soil aggregates (> 2 mm, 1–2 mm, 0.25–1 mm, and  2 mm vs. 9.2% for  2 mm vs. 35.7% for