Title: Response of Dry Seeded Rice to Sowing Dates, Irrigation Regimes and Cultivar Duration
Abstract:Direct dry-seeded rice (DSR) is a resource conservation technology as it consumes less water, incurs low labour expenses and is suitable for mechanization.The aim of this study was to examine the comb...Direct dry-seeded rice (DSR) is a resource conservation technology as it consumes less water, incurs low labour expenses and is suitable for mechanization.The aim of this study was to examine the combined effects of sowing time, irrigation regimes and cultivars on paddy yield and water productivity under dry-seeded rice in a semi-arid sub-tropical environment of north-west India.The treatments included combination of two sowing times (1 st and 20 th June) in main plots, three irrigation regimes -IW/Pan-E ratio of 2.4, 1.6 and -20 kPa matric potential in subplots and two cultivars (PR114/PR121 and PR115) in sub-sub plots.Paddy yield was 20 per cent higher with I 2.4 and I 20kPa irrigation regimes over I 1.6 while utilizing 248 mm more irrigation water.The cultivar PR115 was found to be suitable for dry direct seeding rice being highest yielder among tested cultivars under both of the sowing dates in addition to saving 110 mm irrigation water.PR115 accumulated higher biomass, and had more number of grains per panicle and grain weight compared to PR114.The irrigation water productivity was higher by 5.9 kg ha -1 mm -1 in PR115 than PR114/PR121 which registered 3.1/2.7 kg ha -1 mm -1 .Among irrigation regimes, it was higher in I 1.6 as compared with I 2.4 and I 20kPa .The optimum irrigation schedule for dry-direct seeded rice was found to be I 2.4 and I 20kPa in terms of paddy yield.Read More