Impact of temperature increase on performance of kharif rice at Kalyani, West Bengal using WOFOST model

Abstract

WOFOST model (version 7.1.2) was used to study the impacts of elevated thermal environment on kharif rice at Kalyani situated in lower Gangetic region of West Bengal. The model was calibrated and validated with experimental data collected during kharif season of 2010 to 2013. The simulated yield data was well matched with actual data. The sensitivity analysis for effect of temperature change on crop maturity showed that if temperature was increased by 10C and 20C the maturity period was delayed by 3 and 7 days respectively. The range of simulated yield was 3150 kgha-1 to 5046 kg ha-1 whereas the actual yield in the experimental field ranged from 2907 kg ha-1 to 5495 kg ha-1. The model shows 96 per cent accuracy to predict rice yield with R2 value 0.82 and RMSE value 337.87. It was also observed that the sowing should be done before 15th July to obtain higher yield of kharif rice in the study region.

Crop models and their use in assessing crop production and food security: A review

“…WOFOST has most commonly been applied in Asia and Europe for crop simulations (Table 9). Researchers mostly use this model to analyze climatic yield potential and yield gaps, nitrogen uptake, rice response to fertilizer management and nitrogen use efficiency in long‐term crop cultivation (Dobermann et al, 2000); crop growth, yield (Bussay et al, 2015; Shekhar et al, 2008) and soil‐crop water balance (Bussay et al, 2015); crop phenology response to different sowing dates and varieties (Wu et al, 2017); crop response to rising temperatures (Biswas et al, 2018); crop quality, development, and yield during low, medium, and high‐yielding years under extreme events (van der Velde et al, 2018).…”