Vol. 12, Issue 9 (2023)

Author(s):
Ningthoujam Babulu and N Surbala Devi

Abstract:
A pot experiment was conducted to examine the influence of Single Super Phosphate (SSP), Rock Phosphate (RP) and Phosphorus Solubilising Bacteria (PSB) on availability of phosphorus and its uptake by paddy (CAU-R1) in an acid soil. In comparison to the untreated control, all instances of phosphorus-treated soil exhibited notably higher levels of available phosphorus and its uptake at different stages of crop growth. Comparing with the untreated control all phosphorus treated soil gave significantly higher available P and its uptake at different stages of crop growth. Significantly higher available P was observed in soil treated with 50%SSP + 50%RP + PSB. Relatively more phosphorus uptake was recorded in paddy grown in 50%SSP + 50%RP + PSB followed by 25% SSP + 75% RP + PSB. Application of SSP and RP at 50:50 in combination with PSB maintains a constant pool of phosphorus for availability and agronomic effectiveness. PSB enhances the efficiency of the applied SSP and RP thereby increasing phosphorus availability to the crop which can ultimately boost the yield of paddy in the acid soil.