Effect of macronutrients and manipulation of Morphoframe on yield, quality parameters, nutrient uptake and economics of Bt cotton (Gossypium hirsutum L.)

Abstract

A field experiment was conducted during the Kharif 2016 at Agricultural College farm, Raichur. The results of this experiment revealed that application of 125 per cent RDF recorded significantly higher seed cotton yield (3420 kg ha-1), nutrient uptake (154.24, 34.02 and 174.55 kg N, P and K ha-1) and BC ratio (3.22) compared to 100 per cent RDF (3088 kg ha-1, 138.97, 30.74 and 156.93 kg N, P and K ha-1 and 3.04, respectively), and 75 per cent RDF (2517 kg ha-1, 114.06, 25.44 and 127.81 kg N, P and K ha-1 and 2.60, respectively). Foliar spray of mepiquat chloride @ 100ppm along with boron @ 0.1% at 70 and 90 DAS recorded significantly higher seed cotton yield (3318 kg ha-1), nutrient uptake (148.69, 32.91 and 168.49 kg N, P and K ha-1) and BC ratio (3.52) compared to other morphoframe manipulations except foliar spray of boron @ 0.1 % with nipping during 85-95 DAS (3274 kg ha-1, 147.76, 32.52 and 167.38 kg N, P and K ha-1 and 3.51, respectively).