Vol. 7, Issue 3 (2019)
The rate of reaction of phosphate with soil: An evaluation through plant response in a phosphate deficient soil of West Bengal, India
Author(s): Swarbinay Mahanta, Ambika Prasad Mishra and Abhijit Debnath
Abstract: Phosphate sorption-desorption experiments were conducted in an acid soil (Alfisols) of West Bengal, having low inherent phosphorus (P) before and after incubation with P at 600C. Sorption of P in soil decreased with increasing level of phosphorus added to soil for incubation. The amount of phosphate sorbed at a given phosphate concentration was higher than that during desorption run, showing low desorptivity of sorbed phosphate, indicating high hysteresis and buffering capacity. Incubation with gradual higher levels of added P reduced the hysteresis ratio. The effectiveness of old and freshly applied P in soil was compared from the yields of Mustard (Brassica juncea cv. B9) grown immediately after application of P and that after incubation with P for 35 days at 600C using the Mitscherlich equation. There was a general decrease in the effectiveness of the applied P noted to the tune of 0.267 times due to incubation. This was due to continuing reaction of phosphate with in soil following sorption. For a soil to be less responsive to applied P, it is necessary to supply more phosphate than is removed in produce. However, after long-term phosphate fertilization, it is sufficient to only replace phosphate lost in produce.
Pages: 859-865 | 429 Views 73 Downloads
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How to cite this article:
Swarbinay Mahanta, Ambika Prasad Mishra, Abhijit Debnath. The rate of reaction of phosphate with soil: An evaluation through plant response in a phosphate deficient soil of West Bengal, India. Int J Chem Stud 2019;7(3):859-865.