Vol. 8, Issue 5 (2019)

Author(s):
Vimal Pandey, AK Singh, Krishna Deo, Adita Mishra and Gulab Singh

Abstract:
A field experiment was conducted during the Rabi season of 2011-12 to access the sensitivity analysis of growth and yield attributes of chickpea to the temperature under actual condition using DSSAT model in silty loam soil at student’s instructional Farm, N.D. University of Agriculture & Technology, Kumarganj, Faizabad. The experiment was conducted in split plot design and replicated 4 times with three dates of sowing viz. D₁ (26^th October), D₂ (10^th November) and D₃ (25^th November), and three varieties viz. V₁ (Pusa-362), V₂ (PG-186) and V₃ (Awarodhi). DSSAT crop growth simulation model used for calibration. The historical data of the year 2009-10 and 2010-11 used for improving model tuning. The yield and yield attributes, phonological stages, test weight, harvest index as simulated by model were compared with the observed data. The result revealed that the model underestimated the test weight, LAI, first pod initiation, physiological maturity and overestimated rest of the parameters. Decrease of maximum temperature and minimum temperature by 1⁰C over normal temperature increased the simulated grain yield of chickpea. Higher percent change 35.8% and 34.4% from base yield of 2340 kg^-1 was recorded with decrease of maximum temperature and minimum temperature respectively by 3 ⁰C over normal temperature obtained during the crop period.