Carbon components in organic amendments drive nitrogen metabolism in one-year-long anaerobic soil microcosms.

ABSTRACT:

Introduction

Long-term studies on the dynamic changes in nitrogen metabolism and functional microbial communities under anaerobic conditions, particularly those driven by organic amendments, remain scarce.

Methods

We conducted a year-long anaerobic microcosm experiment using three organic amendments-aerobically fermented pig-manure digestate (ACM), compost (ACP) and straw powder (ACS)-alongside an inorganic fertilizer-only control (ACN).

Results

Temporal shifts revealed that organic amendments drove distinct nitrogen metabolism pathways. Amendments of digestate and compost promoted the proliferation of nitrogen-mineralizing bacteria such as Ramlibacter and Lysobacter, leading to significant ammonium accumulation. After 12-month incubation, the ACM treatm

SUBMITTER: Ma Y 

PROVIDER: S-EPMC12177738 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature