Polymer coated novel controlled release rock phosphate formulations for improving phosphorus use efficiency by wheat in an Inceptisol
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Title |
Polymer coated novel controlled release rock phosphate formulations for improving phosphorus use efficiency by wheat in an Inceptisol
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Creator |
Abhijit Sarkara
Dipak Ranjan Biswas Samar Chandra Datta, Trisha Roy Chandra Moharana Siddhartha Sankar Biswas Avijit Ghosh |
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Subject |
Controlled release fertilizer Rock phosphate Coating agent Phosphorus use efficiency Wheat
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Description |
Not Available
Non-renewable nature of rock phosphate (RP) reserves coupled with low use efficiency of applied phosphorus (P) fertilizers in the soil system results in irreversible loss of huge quantity of P to the environment. The technology of controlled release fertilizers which harmonizes crop demand and release of P from fertilizers are promising to prevent the loss as well as improve the P use efficiency. This article aimed to synthesize and assess some polymer coated novel controlled release rock phosphate formulations to synchronize P release with crop demand and increasing P recovery by wheat. Polymer coated novel products were synthesized by partially acidulating RP with sulphuric and phosphoric acids followed by coating with polyvinyl alcohol and liquid paraffin @ 2 and 3% levels of coating. These products were characterized through X-ray diffraction, fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Phosphorus release pattern from novel coated fertilizers were monitored under controlled conditions in a laboratory incubation experiment at different moisture and temperature regimes. The products were also evaluated for their P supplying capacity to wheat in a greenhouse experiment. Results emanated from incubation study in a P-deficient Typic Haplustept revealed higher release of P at 20% moisture regime and 30 oC temperature. Phosphoric acid based coated products produced greater biomass yield than commercial diammonium phosphate and sulphuric acid formulated products. Product coated with polyvinyl alcohol @ 2% coating released P gradually that synchronized well with the plant P demand and resulted in greater biomass yield, P uptake and recovery by wheat than that of liquid paraffin and 3% level of coating. It can be concluded that novel technology of controlled release RP formulations using different coating agents could be exploited commercially as the alternative to water solubleP-fertilizers for enhancing P use efficiency. Not Available |
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Date |
2020-06-12T09:35:17Z
2020-06-12T09:35:17Z 2018-02-20 |
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Type |
Research Paper
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Identifier |
Not Available
Not Available http://krishi.icar.gov.in/jspui/handle/123456789/37120 |
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Language |
English
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Relation |
Not Available;
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Publisher |
Not Available
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