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Comparing the phosphorus use efficiency of pre-treated (organically) rock phosphate with soluble P fertilizers in maize under calcareous soils.
- Source :
-
PeerJ [PeerJ] 2021 May 24; Vol. 9, pp. e11452. Date of Electronic Publication: 2021 May 24 (Print Publication: 2021). - Publication Year :
- 2021
-
Abstract
- In calcareous soils, phosphorus (P) availability to plant is impaired due to the formation of insoluble complexes with calcium and magnesium. Therefore, this study was executed to compare the P use efficiency (PUE) of four different P sources [rock phosphate (RP), acidulated rock phosphate (ARP), single super phosphate (SSP) and di ammonium phosphate (DAP)] alone or pre-treated with organic amendments (farm yard manure (FYM) enriched compost, simple compost and humic acid (HA)) along with control in maize crop under calcareous soils. All treatments irrespective of P sources received 90 kg P <subscript>2</subscript> O <subscript>5</subscript> ha <superscript>-1</superscript> . Phosphorus application regardless of its sources and combination with organic amendments significantly improved maize growth, yield as well as P uptake and PUE. Rock phosphate when applied alone was recorded inferior but its performance significantly improved with compost or its pre-addition with FYM and HA, that further enhanced upon acidulation. Maize grain yield increased by 21, 22.2, 67.9 and 94% with RP, ARP, ARP enriched compost and ARP+ compost respectively, over control. Similarly, PUE of DAP improved from 31.7 to 43.1 and 39 with sample and enriched compost correspondingly. Post-harvest soil and grain P were at par for SSP, ARP and DAP alone or in conjugation with organic amendments when averaged across the amendments. These results suggested that pretreatment of P sources with organic amendments is an economical and more feasible approach to improve maize yield and PUE. Moreover, on-farm acidulation of RP may give at par results with SSP and DAP with cheaper rate and hence recommended for P management in maize in alkaline calcareous soils.<br />Competing Interests: The authors declare that they have no competing interests.<br /> (© 2021 Mussarat et al.)
Details
- Language :
- English
- ISSN :
- 2167-8359
- Volume :
- 9
- Database :
- MEDLINE
- Journal :
- PeerJ
- Publication Type :
- Academic Journal
- Accession number :
- 34113489
- Full Text :
- https://doi.org/10.7717/peerj.11452