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Solubilization of Purulia Rock Phosphate Through Organic Acid Loaded Nanoclay Polymer Composite and Phosphate Solubilizing Bacteria and its Effectiveness as P-fertilizer to Wheat

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Title Solubilization of Purulia Rock Phosphate Through Organic Acid Loaded Nanoclay Polymer Composite and Phosphate Solubilizing Bacteria and its Effectiveness as P-fertilizer to Wheat
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Creator Trisha Roy
D. R. Biswas
S.C. Datta,
B.S. Dwivedi,
, Lata
, K.K. Bandyopadhyay
Abhijit Sarkar,
B.K. Agarwal
D.K. Shahi
 
Subject Rock phosphate, NCPCs , organic acids, phosphate solubilizer, yield and P uptake, P fractions.
 
Description Not Available
Rock phosphate (RP) reserves across the globe stand out to be a major non-renewable resource and the cost
of phosphatic fertilizers is shooting up causing a burden on the farmers. This study was undertaken with the
purpose of developing a strategy to solubilize low-grade RP from Purulia district of West Bengal, India
through organic acids loaded nanoclay polymer composites (NCPC) and phosphate solubilizing bacteria
(PSB) and to see their effectiveness as P source against commercial diammonium phosphate (DAP) using wheat as the test crop. Oxalic acid and citric acid were loaded @ 2% (w/w) in NCPC (2-mm sieved) having 10% clay (NCPC-OA and NCPC-CA). Organic acid loaded NCPC (2 g kg soil was mixed with powdered RP (100 mesh size) at three rates of P (0, 50 and 100 mg P soil) containing 40 mg acid kg soil) with and without inoculation of PSB (Pseudomonas striata) and tested as source of P to wheat in a greenhouse experiment. An absolute control (without fertilizer material) and a standard P-fertilizer (DAP @ 50 mg P kg soil) were also included for comparison. Results revealed that Purulia RP along with oxalic acid loaded NCPC and PSB inoculation performed significantly better than other treatments in terms of yield of wheat, P uptake and available P in soil. All the P fractions in soil showed an increasing trend due to application of Purulia RP along with organic acid loaded NCPC and PSB. The Fe-P fraction was more dominant in soil compared to other fractions. However, the Ca-P fraction showed a higher value with the increase in levels of P application. The oxalic acid loaded NCPC performed better in most of the cases compared to citric acid loaded NCPC and proved to be a more efficient solubilizer of P from RP. This study could help to utilize Purulia RP as a P source for wheat, with the interventions of organic acids and PSB and reduce the
dependence on commercial fertilizers like DAP.
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Date 2020-05-21T09:29:15Z
2020-05-21T09:29:15Z
2015-01-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/35995
 
Language English
 
Relation Not Available;
 
Publisher Not Available