ABSTRACT
A 90-day incubation experiment in the laboratory with five treatments was used to assess the rate of dissolution of various forms of Phosphorus (P) sources in alluvial soil. viz. 0% RDP (Recommended Dose of Phosphorus); 100% of RDF (Recommended Dose of Fertilizer) NPK; VC (Vermicompost) @ 100% of the RDP; REVC (Rock phosphate Enriched Vermicompost) @ 100% of the RDP and 50% RDP+REVC @ 50% of the RDP. The phosphorus release pattern was determined for every treatment at 30 days interval. The integrated treatment of a 50:50 combination of EVC and P-fertilizer performed better than the other treatments. In soil, this combination produced more labile P (16.05 mg kg−1), whereas Fe-Al-bound P (53.86 mg kg−1), Ca-bound P (163.06 mg kg−1), and residual-P (169.78 mg kg−1) in 100% rock phosphate enriched vermicompost. It may be inferred that enriched vermicompost (50%) combined with reduced inorganic P fertilizer treatment (50%) could be highly beneficial in supplementing plant P requirements by boosting P release and availability under naturally P deficient situations.
Acknowledgement
The authors gratefully acknowledge the contributions of laboratory and field technicians from the Bihar Agriculture University Sabour that made this research possible. Director Research, BAU, for his support and critical suggestions. B. A. U. SABOUR COMMUNICATION NO. is 1027/210826.
Disclosure statement
No potential conflict of interest was reported by the author(s).