November 20, 2023 | Environmental Science & Technology |
Introduction: While iron oxides are thought to protect SOC in oxygen-deprived environments, the role of these oxides, biochar, and microbial interactions in SOC fate remained unclear. In a four-month experiment with rice seedlings under waterlogged conditions, researchers from Chinese Academy of Science investigated the complex interplay of iron oxides, biochar, and microbial communities in influencing soil organic carbon (SOC) dynamics.
Key findings: The study found that biochar significantly impacted soil enzyme activities, particularly in larger soil aggregates. Iron oxides and necromass were found to have negative associations with SOC levels. Notably, bacterial communities demonstrated strong connections with viral communities. Contrary to conventional beliefs, the increase in SOC was not primarily attributed to iron oxides; instead, it was strongly influenced by intricate interactions between bacteria and viruses, with specific keystone ecological clusters and taxa playing crucial roles.
Fig. | Graphical Abstract.