N₂-fixing bacteria are more sensitive to microtopography than nitrogen addition in degraded grassland.

ABSTRACT:

Introduction

Soil bacteria play a crucial role in the terrestrial nitrogen (N) cycle by fixing atmospheric N₂, and this process is influenced by both biotic and abiotic factors. The diversity of N₂-fixing bacteria (NFB) directly reflects the efficiency of soil N fixation, and the diversity of NFB in degraded alpine meadow soil may change with different N fertilizing levels and varied slopes. However, how N addition affects the diversity of NFB in degraded alpine meadows, and whether this influence varies with slope, remain poorly understood.

Methods

We conducted an N addition field experiment at three levels (2, 5, and 10 g N·m^-2·a^-1) to study the effects of N addition on soil NFB diversity on two different slopes in a degraded mea

SUBMITTER: Li C 

PROVIDER: S-EPMC10540685 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature