Calibration and validation of CROPGROW -chickpea model under semiarid condition
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Date
2021-09
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CCSHAU, Hisar
Abstract
Field experiment entitle “Calibration and validation of CROPGROW-chickpea model under semiarid condition” was conducted during Rabi season 2020-21 at research farm of Department of Agricultural Meteorology, CCS HAU, Hisar (290 10’ N, 750 46’ E and altitude 215.2 m). The experiment consisted of four date of sowings as main plot treatments namely, D1-13th October, D2-1st November, D3-15th November, D4- 2nd November; sub plot treatments comprised of three varieties viz. (V1)- HC 1, (V2)- HC 7 and (V3)- HC 5. The experiment was laid out in split plot design with three replications. Relative humidity and temperature at morning hours was maximum at the bottom of canopy and it decreased towards the top at flowering and pod initiation stage while at maturity stage temperature increased towards the canopy top and relative humidity decreased towards the top of canopy. Accumulated intercepted PAR was maximum for (D1-13th October) and variety HC 7. Yield and yield attributes were highest for (D1- 13th October) and variety HC 7. Plant height was maximum in variety HC 5 and (D1-13th October). Crop growth observations except plant height were highest for (D1-13th October) and HC 7 while plant height was observed maximum in (D1-13th October) and variety HC 5. DSSAT model was simulated and compared with observed values and results have revealed that simulated days to flowering, days to pod initiation, days to physiological maturity and seed yield were in good agreement with observed values. Model overestimated days to flowering, days to pod initiation, days to physiological maturity and underestimated the seed yield and leaf area index. The model can be used satisfactorily for prediction of phenology and seed yield.