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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
Not Available
 
Creator Sarkar, A., Biswas, D.R., Datta, S.C., Roy, T., Moharana, P.C., Biswas, S.S. and Ghosh, A
 
Subject Controlled release fertilizer,Rock phosphate, Coating agent, Phosphorus use efficiency, Wheat
 
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 o
C
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 soluble P-fertilizers for enhancing P use efficiency
Not Available
 
Date 2018-11-20T07:00:40Z
2018-11-20T07:00:40Z
2018-08
 
Type Research Paper
 
Identifier Sarkar, A., Biswas, D.R., Datta, S.C., Roy, T., Moharana, P.C., Biswas, S.S. and Ghosh, A. 2018. Polymer coated novel controlled release rock phosphate formulations for improving phosphorus use efficiency by wheat in an inceptisol. Soil and Tillage Research, 180: 48-62.
0167-1987
http://krishi.icar.gov.in/jspui/handle/123456789/12282
 
Language English
 
Relation Not Available;
 
Publisher Elsevier