Higher carbon sequestration potential and stability for deep soil compared to surface soil regardless of nitrogen addition in a subtropical forest.

ABSTRACT:

Background

Labile carbon input could stimulate soil organic carbon (SOC) mineralization through priming effect, resulting in soil carbon (C) loss. Meanwhile, labile C could also be transformed by microorganisms in soil as the processes of new C sequestration and stabilization. Previous studies showed the magnitude of priming effect could be affected by soil depth and nitrogen (N). However, it remains unknown how the soil depth and N availability affect the amount and stability of the new sequestrated C, which complicates the prediction of C dynamics.

Methods

A 20-day incubation experiment was conducted by adding ¹³C labeled glucose and NH₄NO₃ to study the effects of soil depth and nitrogen addition on the net C sequestration. SOC was fraction

SUBMITTER: Liao C 

PROVIDER: S-EPMC7224229 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature