Evaluation of potential rice (Oryza sativa L.) genotypes with different levels of N under rainfed shallow lowland situation

Abstract

A field experiment was conducted to evaluate the yield of potential rice genotypes during kharif season, 2012 and 2013 at Rice Research Station, Bankura, West Bengal, India on sandy loam soil of slightly acidic in reaction (pH: 5.7). This experiment was conducted in split-plot design with three replications. The results indicated that 105 kg N ha^-1, the yield attributes recorded maximum number of panicles m^-2 (307.9), panicle length (25.3cm), panicle weight (2.32g), number of filled grains per panicle (117.8), 1000-grains weight (24.5g) and finally recorded highest grain yield (4.80 t ha^-1) than lower fertilities. While, 70 kg N ha^-1 was remained closed to 105 kg N ha^-1 in number of panicles m^-2, panicle weight and number of filled grains per panicle. Among the potential rice varieties ‘Sampriti’ (IET 21987) recorded the highest grain yield (4.66 t ha^-1) under rainfed shallow lowland situation of red and laterite zone of West Bengal. The highest grain yield (4.80 t ha^-1) was obtained at 105 kg N ha^-1and it was statistically at par with 70 kg N ha^-1 (4.62 t ha^-1). Therefore, the increased in grain yield of rice by the varieties due to overall respective performance in growth and appreciable improvement in the yield attributing characters.