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A field experiment was conducted on a clay loam soil at Indian Institute of Rice Research (IIRR) formerly Directorate of Rice Research (DRR), Rajendranagar, Hyderabad, Telangana during the kharif seasons of 2017 and 2018. to study the “productivity and water use efficiency of rice cultivars under different irrigation regimes and systems of cultivation” The treatments consisted of two irrigation regimes Alternate wetting and drying and Saturation as main plot treatments, three establishment methods System of Rice Intensification (SRI), Drum Seeding (DS) and Normal transplanting (NTP) as sub plot treatments and four Cultivars namely DRR Dhan 42, DRR Dhan 43, MTU-1010 and NLR-34449 as sub-sub plot treatments summing up to 24 treatment combinations laid out in split-split plot design with three replications. Among all cultivars NLR-34449 produced the highest leaf area index (4.22, 4.11 and 4.16) at 90 DAT, DRR Dhan 42 produced the significantly higher AGR at 30-60 DAT (0.39, 0.42 and 0.40) a n d NLR34449 produced the significantly lower CGR at 30-60 DAS/DAT (8.96, 9.24 and 9.10) during 2017, 2018 and in pooled means, respectively. Among all rice cultivars, RGR at all the crop growth stages in both the years of study and in pooled means was statistically non-significant. The growth analysis, viz., LAI, AGR, CGR, and RGR were significantly recorded higher in SRI than DS and NTP during both the years of study.

Influence of Different Irrigation Regimes and Systems of Cultivation on Physiological Growth Parameters of Rice Cultivars