Effect of nutrient management practices on seed cotton yield (Gossypium hirsutum L.) and physiological disorders

Abstract

On vertisol at Agricultural College Farm, Raichur during 2010-11, field experiment was laid out with fertilizer levels in main-plots and foliar applications of nutrients in sub-plots with three replications in split-plot design. Effect of nutrient management practices differed significantly on physiological disorders and seed cotton yield. Fertilizer levels of 156.25:93.75:93.75 kg N:P2O5:K2O ha-1 with 12.5 t ha-1 of farm yard manure recorded significantly higher seed cotton yield (17.06 q ha-1) with higher reproductive structures and reduced physiological disorders over other fertilizer levels. Besides, foliar applications of 0.5 % tracel (Zn, Fe, Mn and B) recorded significantly higher seed cotton yield (17.52 q ha-1) with higher reproductive structures and reduced physiological disorders against control. In addition, interaction effect due to fertilizer levels of 156.25:93.75:93.75 kg N:P2O5:K2O ha-1 with 12.5 t ha-1 of farm yard manure and foliar applications of 0.5 % tracel recorded significantly higher seed cotton yield (19.88 q ha-1) with higher reproductive structures and reduced physiological disorders, besides it was on par with fertilizer levels of 156.25:93.75:93.75 kg N:P2O5:K2O ha-1 with 12.5 t ha-1 of farm yard manure and foliar applications of 10 ppm planofix when compared to rest of the other treatment combinations.