V.K. Phogat, M.D. Parihar*, Rita Dahiya, M.K. Sharma and Sushil Kumar Singh
Department of Soil Science, CCS Haryana Agricultural University, Hisar
Received-09.08.2021, Revised-18.08.2021, Accepted-27.08.2021
Abstract: Field experiments were conducted during kharif 2016 and 2017 at the Research Farm of the Department of Soil Science, CCS Haryana Agricultural University, Hisar, to study the seed cotton yield and water productivity (WP) of Bt (Bio-6588, RCH-650) and non-Bt (H-1098 (I) cotton cultivars under different irrigation schedules. The irrigation schedules were: first irrigation at 40 days after sowing (DAS) and subsequent irrigation based on IW/CPE of 0.60, 0.75 and 0.90. In addition, first irrigation at 50 DAS followed by subsequent irrigation at IW/CPE of 0.60, 0.75 and 0.90. Thus, a total of six irrigation schedules were kept. Irrespective of irrigation schedules, there was no significant difference in seed cotton yield ofBt cotton cultivars but their yields were significantly higher than the seed cotton yield of non-Bt cotton (H-1098 (I) during both the years. Due to frequent rains during the crop growing season, the proposed irrigation schedules could not be followed precisely, hence, no influence on the seed cotton yield of the both Bt and non-Bt cotton cultivars during both the years. Hence, irrigation scheduling based on IW/CPE considering both the time and amount of rainfall for cotton or may be for other kharif crops during rainy season did not found suitable/applicable for managing irrigation water efficiently.
Keywords: Cotton cultivars, seed cotton yield, irrigation, water productivity
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