Impact of Climate Change on Dryland Sorghum in India

Boomiraj, K and Wani, S P and Agrawal, P K (2011) Impact of Climate Change on Dryland Sorghum in India. In: Use of High Science Tools in Integrated Watershed Management Proceedings of the National Symposium, 1–2 February 2010, NASC Complex, New Delhi, India.

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This paper presents results of climate change impacts on sorghumin semi arid tropics (SAT) regions of India and adaptation strategiesto overcome the impact. The main objective of the paper is how touse crop simulation model to assess the climate change impact andhow best we can reduce the impact through integrated watershedapproach. InfoCrop, a generic dynamic crop model, provides inte-grated assessment of the effect of weather, variety, pests, and soilmanagement practices on crop growth and yield, on soil nitrogen andorganic carbon dynamics in aerobic, anaerobic conditions, and alsogreenhouse gas emissions. The model has reasonably predictedphenology, crop growth yield. Sorghum crop was found to be sensitiveto changes in carbon dioxide (CO2) and temperature. Future climatechange scenario analysis showed that sorghum yields (CSH 16 andCSV 15) are likely to reduce at Akola, Anantpur, Coimbatore andBijapur. But yield of CSH 16 will increase little in Gwalior (0.1%) at2020 and there after it will reduce. At Kota, the sorghum yield is likelyto increase at 2020 (3.3 & 1.7% in CSH 16 and CSV 15, respectively)and no change at 2050 and yield will reduce at 2080 in both varieties.The increase in yield at Gwalior and Kota at 2020 will be due toreduction in maximum temperature and increase in rainfall from thecurrent. Adoption of adaptation measures like one irrigation (50mm)at 40-45 days after sowing would be better for rain-fed kharif sorghumin the selected location of the SAT regions. The yield gap betweendistrict average and simulated rain-fed potential is so wide at Akola,Anantpur, Bijapur and Kota compared with Coimbatore and Gwalior. Ifwe bridge the yield gap, we can overcome the climate change impact.Integrated Genetic and Natural Resource Management (IGNRM)through watershed management would be an appropriate method tobridge the yield gap to sustain the sorghum yield and food security

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: InfoCrop, Simulation, Watershed, Adaptation, Dry matter,Leaf area index, Maturity, India, SAT
Subjects: Mandate crops > Sorghum
Others > Watershed Management
Others > Climate Change
Depositing User: Mr Sanat Kumar Behera
Date Deposited: 02 Nov 2011 12:33
Last Modified: 02 Nov 2011 12:33
Acknowledgement: We acknowledge Sir Dorabji Tata Turst and Sir Ratan Tata Trust forproviding financial support for this study and NRC–Sorghum forproviding data for model calibration and validation
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