Vol. 11, Special Issue 8 (2022)

Author(s):
Mohammed Rizwan Saif, RH Patil, KG Sumesh and Basavaraj S Yenagi

Abstract:
Groundnut is a protein rich oilseed crop predominately cultivated in Dharwad district of Karnataka and varieties viz., JSP-39, KDG-123, TG-37-A, TGLPS-3 and JL-1085 are adapted to the Northern part of Karnataka as well as the neighbouring state of Maharashtra. Climate change with rising temperature and erratic rainfall patterns is threatening the productivity of this crop. Hence, study was taken up to find the response of summer groundnut varieties to the changing climate in Dharwad district of Karnataka using DSSAT model. Experimental data required to calibrate, validate and run the model were collected from experiments conducted during summer of 2019-2020 and 2020-2021 at AICRP-Groundnut, MARS, UAS, Dharwad. The seasonal analysis was done under current (1991-2020) and projected climate (2021-2050) following recommended package of practices for UAS, Dharwad and for representative black clay and red loam soils of Dharwad district, under irrigated conditions across five dates of sowing from 15, Dec to 15, Feb at 15 days interval. Thirty years average yield simulated on black clay soils under current climate in irrigated conditions was 30 per cent higher than on red loamy soil in irrigated conditions. Under projected climate crop duration was shortened by 5 days, but yield increased by 4 to 19 per cent across varieties compared to yield under current climate, which mostly masked the negative effects of climate change on crop in the projected period. Dharwad district differed in terms of optimum sowing window in irrigated situation under both current and projected climate. Under irrigated condition early sowing i.e., 15, Dec to 30, Dec simulated higher yields for TGLPS-3 variety.