Performance of CERES-rice model for prediction of different rice cultivars at Navsari

Abstract

Filed experiment was conducted during kharif season of 2012 at college farm of Navsari Agricultural University, (Gujarat) to investigate the CERES-Rice model validation for three rice cultivars, viz., V₁ - Jaya, V₂ - Gurjari and V₃ - GNR-2 with three different dates of transplanting, viz., D₁- 12 July, 2012, D₂- 27 July, 2012 and    D₃-11 August, 2012 and two nitrogen levels, viz., N₁-75 kg/ha and N2-100 kg/ha. The experiment was laid out in a split plot design. The model was subsequently validated against observed data from field experiment. From the response of CERES-Rice model it was found that among the genotypes prediction accuracy for cv. Gurjari at third date of transplanting at 100 kg N level was better in respect to panicle initiation with percent error PE (-4.25%), anthesis  (-3.40%) and beginning of grain filling (1.05%). But for physiological maturity stage, cv. GNR-2 was found better at third date of transplanting at same N level with PE (-0.97%) as comparison to other treatments.