Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges &
Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
Thorat Deepak S, Sahoo P. K, Dipankar De and Mir Asif Iquebal. 2014. Design and
Development of Ridge Profile Power Weeder. J. Agric. Eng., 51 (4)
Veerangouda M, Anantachar M and Sushilendra. 2010. Performance evaluation of weeders in
cotton. Karnataka J. Agric. Sci., 23(5): 732-736.
T5-09R-1101
Sorghum Yield Response to Future Climate in a Semi-Arid Environment
M. A. Sarath Chandran* and A. V. M. Subba Rao
ICAR-Central Research Institute for Dryland Agriculture, Hyderabad – 500059, Telangana, India
*ma.sarath@icar.gov.in
Sorghum is a key dryland cereal crop that is highly adaptable to various extreme weather
events, especially drought. The industrial demand for sorghum has been on the rise, considering
the requirement in the food industry. Hence, the response of sorghum to projected climate is a
topic of interest in semi-arid regions of the world. Climate, with its spatial and temporal
variability, is a major influencing factor in crop production. Thus, any change in climatic
elements is bound to have either positive or negative impacts on crop production. While the
increase in temperature during crop growing season reduces the yield, the CO 2 fertilization
effect to an extent can reduce its negative impact. Very little literature is available in the Indian
context regarding the response of various sorghum cultivars to projected climate using crop
modelling. This present study was undertaken with the objectives to calibrate the CERES-
Sorghum-DSSAT model for the semi-arid region of India, validating the CERES-Sorghum-
DSSAT model for sorghum and quantifying the impact of projected climate on growth and
yield of sorghum in the semi-arid region of India.
Methodology
A field experiment was conducted in Gunegal Research Farm of ICAR-CRIDA during the
Kharif seasons of 2016-2018 in a split-plot design with three dates of sowing as the main plot
treatment and three sorghum cultivars (CSV-20, CSV-23 and CSV-27) as sub-plot treatments.
The data during the first two years was used for calibration of the CERES-Sorghum model in
DSSAT v4.7.0 and the third-year data was used for model validation. The future climate was
derived from an ensemble of 29 general circulation models (GCMs). The simulation was
conducted for three time periods viz., near-century (2010-39), mid-century (2040-69) and endcentury
(2070-99) under emission pathways of RCP4.5 and RCP8.5. The mean changes in days
to anthesis, total crop duration, and yield during the future time periods compared to that of
baseline (1980-2009) were estimated.
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