Productivity, Quality and Economics of Bt Cotton Hybrids as Influencedby Planting Density

摘要

A field experiment carried out during Kharif, 2006-07 at Agricultural College Farm, Bapatla revealed that Bt cotton hybrids (RCH-20 Bt, Mallika Bt, Bunny Bt) recorded significantly higher seed cotton yield over Bunny non-Bt hybrid. Mallika Bt and Bunny Bt hybrids recorded significantly higher seed cotton yield hectare~(-1) over RCH-20 Bt and Bunny non-Bt. The highest plant density of 37,037 plants ha~(-1) recorded the highest seed cotton yield ha1, gross returns, net returns and BCR. The quality parameters viz., ginning percentage, 2.5% span length and fibre strength were not significantly influenced by either cotton hybrids or plant densities. Mallika Bt with the plant density of 37,037 plants ha~(-1) gave the highest yield, net returns and B:C ratio than the remaining treatment combinations of Bt cotton hybrids and plant densities.