Trends in water requirements of wheat crop under projected climates in India

Authors

  • V.P. PRAMOD ICAR-Central Research Institute for Dryland Agriculture, Santosh Nagar, Hyderabad-500059, India.
  • B. BAPUJI RAO ICAR-Central Research Institute for Dryland Agriculture, Santosh Nagar, Hyderabad-500059, India.
  • S.S.V.S. RAMAKRISHNA Department of Meteorology and Oceanography, Andhra University, Visakhapatnam - 530 004
  • V.M. SANDEEP ICAR-Central Research Institute for Dryland Agriculture, Santosh Nagar, Hyderabad-500059, India.
  • N. R. PATEL Indian Institute of Remote Sensing, Dehradun- 248 001
  • M.A. SARATH CHANDRAN ICAR-Central Research Institute for Dryland Agriculture, Santosh Nagar, Hyderabad-500059, India.
  • V.U.M. RAO ICAR-Central Research Institute for Dryland Agriculture, Santosh Nagar, Hyderabad-500059, India.
  • P. SANTHIBHUSHAN CHOWDARY ICAR-Central Research Institute for Dryland Agriculture, Santosh Nagar, Hyderabad-500059, India.
  • P. VIJAYA KUMAR ICAR-Central Research Institute for Dryland Agriculture, Santosh Nagar, Hyderabad-500059, India.

DOI:

https://doi.org/10.54386/jam.v20i2.520

Keywords:

Water requirement, irrigation requirement, crop growing period, climate change, trends, future scenarios

Abstract

Various global circulation models predict a change in net irrigation requirements worldwide due to the impacts of climate change and in India, depending upon the region, irrigation requirements are likely to change by different magnitudes. The spatial distribution of trend in crop and irrigation water requirements of wheat projected for two climatic periods (2021-50 and 2051-80) across major wheat
growing districts of the country were analyzed, making use of climate change projection data from  NorESM1-M model of the CMIP5 in combination with RCP 4.5. Decreasing trends in water requirements were projected over 90 per cent of wheat growing districts in 2021-50, whereas increasing trends in crop and irrigation water requirement are expected over 95.4 per cent and 62.4 per cent areas, respectively in 2051-80 climatic periods. Results showed that decreasing/increasing trends projected in water requirements of wheat crop is due to change in crop growing period, which is projected to decrease across entire wheat growing area in 2021-50, whereas it is likely to increase over 78.2 per cent in 2051-80 climatic periods.

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Published

01-06-2018

How to Cite

V.P. PRAMOD, B. BAPUJI RAO, S.S.V.S. RAMAKRISHNA, V.M. SANDEEP, N. R. PATEL, M.A. SARATH CHANDRAN, V.U.M. RAO, P. SANTHIBHUSHAN CHOWDARY, & P. VIJAYA KUMAR. (2018). Trends in water requirements of wheat crop under projected climates in India. Journal of Agrometeorology, 20(2), 110–116. https://doi.org/10.54386/jam.v20i2.520

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Section

Research Paper

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