Nitrogen addition accelerated straw <i>in-situ</i> decomposition by promoting specific microbial taxa growth and straw decomposing enzyme activities.

ABSTRACT:

Introduction

Crop residue represents the largest input of organic carbon in agricultural ecosystems and its decomposition is fundamentally mediated by soil microbial communities. However, the mechanism of N fertilization regulating decomposition of the plant residue especially the associated key microbial taxa remain unclear.

Methods

To address this gap, we conducted a 100-day field decomposition experiment using the litterbag method to track temporal shifts in straw physicochemical properties and associated microbial communities under three N regimes: no nitrogen (N0), 200 kg N ha^-1 (N200), and 300 kg N ha^-1 (N300).

Results and discussions

Results showed that nitrogen addition significantly accelerated the decomposition of wheat straw, increasin

SUBMITTER: Guo T 

PROVIDER: S-EPMC12753900 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature