Comparative Scheduling of Phosphorus Application for Enhancing Rice Yield and Efficiency Indices
Comparative Scheduling of Phosphorus Application for Enhancing Rice Yield and Efficiency Indices
Fayyaz Hussain*, Raza Ullah Khan, Asim Hayat, Humair Ahmed and Ahmad Khan
ABSTRACT
Field experiments were conducted on farmers field at two locations aimed at exploring the response of phosphorus (P) applied to rice at different growth stages.Phosphorus was applied in three interval i.e. at transplanting (0 DAT), 15 days after transplanting (15 DAT), and 25 days after transplanting (25 DAT), in addition to control (no P), and farmer fertilizer practice (FFP).Results show that mean paddy yield across both sites range from 2.972 to 4.334t ha-1, and maximum with P applied at 15 DAT, and contrarily the lowest with control treatment.Paddy yield increase over control was 37.3%at Sadhoke (location 1) and 40.1% at Mannoabad (location 2).Other growth parameters such as harvest index (HI) range from 37.9% to 41.7%, agronomic efficiency(AE) from 30.3 to 39.5 kg paddy yield increase kg-1 P applied and total P uptake (TPU)range from 12to 21.2 kg P ha-1, P harvest index (PHI)ranges from 65% to 70% and Phosphorus Recovery Efficiency (PRE) range from 27% to 30%. On average the achieved paddy yield, HI, AE, TPU, PHI and PRE were statistically higher whereP applied at 15 DAT.On overall, significant differences were found in different parameters between locations.
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