Impact of projected climate (2021-2030) on Bt Cotton hybrids in North Interior Karnataka

R.  DIVYA; K. G.   SUMESH; R. H.  PATIL; B. S.  PATIL

doi:10.61475/jfm.v35i04.41

R. DIVYA Department of Agricultural Meteorology University of Agricultural Sciences, Dharwad - 580 005, Karnataka, India
K. G. SUMESH Department of Agricultural Meteorology University of Agricultural Sciences, Dharwad - 580 005, Karnataka, India
R. H. PATIL Department of Agricultural Meteorology University of Agricultural Sciences, Dharwad - 580 005, Karnataka, India
B. S. PATIL Department of Agricultural Meteorology University of Agricultural Sciences, Dharwad - 580 005, Karnataka, India

DOI: https://doi.org/10.61475/jfm.v35i04.41

Keywords: Ankur_3028, ATM, Brahma, Cotton, DSSAT, Projected climate, RCH-659, Simulated yield, Vada Basant, Vada Sai Kiran

Abstract

Cotton is one of the important fibre crops of north interior Karnataka (NIK) grown under both rainfed andirrigated conditions. However, the productivity of the crops including cotton is being threatened by climate change due tothe increase in temperature and variable rainfall patterns. A study was taken up to find the effect of projected climate for theperiod from 2021 to 2030 on the productivity of selected Bt. Cotton hybrids across NIK. Experimental data required tocalibrate, validate and run the model were collected from experiments conducted 2018 and 2019 at KVK Jalna, Kharpudi,Maharashtra as part of a WWF (World Wide Fund) project. CROPGRO model was used to run simulations under current(2011-2020) and projected climate (2021-2030) following recommended practices of UAS, Dharwad on black clay soil ofeach district of NIK. The maximum yield enhancement under the projected climate (2021-2030) was observed in Ankur_3028(7.5 %) followed by ATM (4.6 %), Vada Sai Kiran (4.4 %), Vada Basant (3.7 %). The highest yields were simulated inBelgaum district among all the districts of NIK, and hybrid Ankur_3028 simulated the highest increment of 33.6 %,followed by ATM (30.6 %), RCH-659 (22 %), Brahma (18.2 %), Vada Basant (15.5 %) and Vada Sai Kiran (12.6 %).