DOI: 10.18393/ejss.1585148 ISSN: 2147-4249

Zeolite-based nano phosphatic fertilizer for enhancing phosphorus availability in acidic soils of Assam, India

Sukanya Pachani, Gayatri Goswami Kandali, Binoy Kumar Medhi, Lakshi Saikia, Anjali Basumatary, Mahima Begum, Samikhya Bhuyan
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Considering the fixation and low availability of conventional phosphatic fertilizer in acidic soil, zeolite based nano phosphatic fertilizer was synthesized to investigate its release characteristics in acidic soil system via invitro studies. Result revealed that surface modification through a cationic surfactant improved the adsorption capacity of zeolite for phosphorus by 60%. Under the incubation study, the zeolite based nano phosphatic fertilizer sustained the release of phosphorous up to 90 days of incubation against 32 days under conventional SSP. The 100% replacement of RDP through nano fertilizer registered the maximum release of P in soil up to 9.36 mg/kg which was 23.80% higher than conventional SSP (7.56 mg/kg). The study release kinetics also revealed parabolic diffusion equation (3.012 µg/g/day) as the most suitable module for describing the P release as compared to other kinetic modules. Thus, zeolite can be used as carrier material for preparation of nano fertilizer for sustainable release of P for longer period of time under acidic soil.

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