Climate change and global warming poses a significant threat to agriculture and global food security. The reported study aimed at investigating the impact of climate change on wheat yield and coping strategies using CERES-Wheat model of DSSAT v 4.0 in the West Midnapore district of West Bengal, India. The model was calibrated with the field experimental data for 2 years (2002-04). Subsequently simulation study was conducted using weather data for period of 27 years and the crop growth model. Results of the study revealed that grain yield decreases with increase in seasonal temperature. The model simulated yield was observed to decline by 284.8 kg/ha per degree celcious rise in average seasonal temperature. This reduction in yield is due to shorter maturity period at high temperatures which affect the spikelet sterility and hence reduces the grain yield. On the contrary, yield will increase by 4- 30% with increase in CO₂ level by 50-380 ppm over the present concentration. Increase in temperature by 0.5-2°C decreases grain yield by 8- 40%. The results of the study revealed that adverse effect of change in the parameters can be countered to a certain extent by adapting appropriate change in to management practices such as planting date, planting density and irrigation threshold. The results clearly indicate that the delay in sowing date under rising temperature condition is an appropriate strategy for achieving maximum benefits. It was observed that wheat yield increased with an increase in irrigation threshold value up to 35%. The highest grain yield was observed at plant density 200 plants/m2.
|Keywords:||Climate Change, CERES-Wheat, DSSAT v 4.0, Grain Yield, Calibration, Validation|
M Tech Student, Soil and water conservation Engineering, Kharagpur, West Bengal, India
Professor, Soil and water conservation Engineering, Kharagpur, West Bengal, India
West Bengal, India
There are currently no reviews of this product.Write a Review