Effect of combined application of inorganic nitrogen and phosphorus to an organic-matter poor soil on soil organic matter cycling.

ABSTRACT:

Background

Sequestering carbon dioxide (CO₂) in agricultural soils promises climate change mitigation as well as sustainable ecosystem services. In order to stabilize crop residues as soil carbon (C), addition of mineral nutrients in excess to crop needs is suggested as an inevitable practice. However, the effect of two macronutrients i.e., nitrogen (N) & phosphorus (P), on C cycling has been found contradictory. Mineral N usually decreases whereas mineral P increases the soil organic C (SOC) mineralization and microbial biomass. How the addition of these macronutrients in inorganic form to an organic-matter poor soil affect C cycling remains to be investigated.

Methods

To reconcile this contradiction, we tested the effect of mineral N (120 kg N ha^-1</

SUBMITTER: Anwar F 

PROVIDER: S-EPMC11380837 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature