Influence of sodium para nitrophenolate 0.3% SL on growth and yield of rice in new Alluvial Zone (NAZ) of West Bengal

Abstract

Plants produce their own plant growth regulators (PGRs); however various studies have shown that plants may respond to exogenously applied growth hormones. Field experiments were conducted in rabi and kharif seasons of 2017-18 & 2018-19 at Kalyani D block Farm, Kalyani, Nadia under Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal with total six (6) treatments; T 1 : Sodium para-nitrophenolate 0.3% SL @5 ml L -1 , T 2 : Sodium para-nitrophenolate 0.3% SL @10 ml L -1 , T 3 : Sodium para-nitrophenolate 0.3% SL @20 ml L -1 , T 4 : Triacontanol 0.1% EW @250 ml ha -1 , T 5 : Gibberellic acid 0.001%L @180 ml ha -1 and T 6 : Untreated control; to evaluate the bio-efficacy of Sodium para-nitrophenolate 0.3% SL (PGR) on boro and kharif rice at New Alluvial Zone (NAZ) of West Bengal. All the plant growth regulators (PGRs) were applied as foliar spray at three times in both the seasons i.e. 1 st spray at 20-25 DAT, 2 nd spray at 45-50 DAT and 3 rd spray at 65-70 DAT. Results from the experiment revealed that the application of Sodium para-nitrophenolate 0.3% SL @2% a.i., i.e., 20 ml L -1 formulation significantly increased the growth attributes i.e. height of hill (cm) and number of effective tillers per sq.m., yield attributes i.e. length of panicle (cm), number of filled grains per panicle and 1000 seed wt. (g) and ultimately grain yield and straw yield (t ha -1 ) of both boro and kharif rice in both the year while effect on days to maturity and days to 50% flowering of crop remain same instead of application of plant growth regulators.