Microbial Proxies for Anoxic Microsites Vary with Management and Partially Explain Soil Carbon Concentration.

ABSTRACT: Anoxic microsites are potentially important but unresolved contributors to soil organic carbon (C) storage. How anoxic microsites vary with soil management and the degree to which anoxic microsites contribute to soil C stabilization remain unknown. Sampling from four long-term agricultural experiments in the central United States, we examined how anoxic microsites varied with management (e.g., cultivation, tillage, and manure amendments) and whether anoxic microsites determine soil C concentration in surface (0-15 cm) soils. We used a novel approach to track anaerobe habitat space and, hence, anoxic microsites using DNA copies of anaerobic functional genes over a confined volume of soil. No-till practices inconsistently increased anoxic microsite extent compared to conventionally tilled so

SUBMITTER: Lacroix EM 

PROVIDER: S-EPMC11223465 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature