Effect of combined application of inorganic nitrogen and phosphorus to an organic-matter poor soil on soil organic matter cycling
Contrary to literature, P addition stimulated soil C mineralization very briefly at start of incubation period and released similar total cumulative CO<sub>2</sub>-C as in control soil. We attributed this to low organic C content of the soil as P addition could desorb very low amounts of labile C for microbial use. Adding N with litter built up the largest microbial biomass (144% higher) without inducing any further increase in CO<sub>2</sub>-C release compared to litter only addition. However, adding P with litter did not induce any increase in microbial biomass. Co-application of inorganic N and P significantly increased C mineralization in presence (19% with respect to only litter amended) as well as absence (41% with respect to control soil) of litter. Overall, our study indicates that the combined application of inorganic N and P stabilizes added organic matter while depletes the already unamended soil.
Authors
- Tanvir Shahzad (ORCID: https://orcid.org/0000-0002-7703-4669)
- Sabir Hussain (ORCID: https://orcid.org/0000-0002-5720-7120)
- Faiza Anwar (ORCID: https://orcid.org/0000-0002-5932-4099)
- Muhammad Sanaullah (ORCID: https://orcid.org/0000-0002-9842-077X)
- Hayssam M. Ali (ORCID: https://orcid.org/0000-0001-6801-4263)
- Zubda Zahid
- Faisal Mahmood (ORCID: https://orcid.org/0009-0002-7695-7741)
Institutions
- Government College University, Faisalabad (PK)
- Czech University of Life Sciences Prague (CZ)
- King Saud University (SA)
- University of Agriculture Faisalabad (PK)
Publication Details
- Journal
- PeerJ
- Published
- 2024-09-05
- DOI
- https://doi.org/10.7717/peerj.17984
- Citations
- 3
- Primary Topic
- Soil Carbon and Nitrogen Dynamics
- Type
- article
- Field-Weighted Citation Impact
- 1.00
Funders
- King Saud University