Quality, Uptake of Nutrients and Economics of Irrigated BT Cotton (Gossypium Hirsutum L.) as Influenced by Macro Nutrients and Liquid Fertilizers

Vinayak Hosamani, Halepyati AS

Abstract

A field experiment was conducted during kharif, 2011 at Agricultural College Farm, Raichur to study the effect of macro nutrients and liquid fertilizers on growth and yield of irrigated Bt cotton (Gossypium hirsutum L.). The results revealed that application of 125 per cent RDF recorded the highest lint index (5.60) ginning percentage (36.17), harvest index (0.34), uptake of nitrogen (107.81 kg ha-1), phosphorus (109.25 kg ha-1), potassium (30.08 kg ha-1), gross returns (Rs. 79,718 ha-1) and net returns (Rs.56,740 ha-1) over 100 per cent RDF ( 5.51,35.62,0.28, 9.88, 103.00 kg ha-1 26.80 kg ha-1,104.53 kg ha-1 and Rs. 70,505 ha-1and Rs.48,723 ha-1, respectively). Among foliar spray of liquid fertilizers foliar spray of Bio 20 @ 3 ml/l recorded the highest lint index (6.00),ginning percentage (37.00), harvest index (0.33), seed index (10.13), uptake of nitrogen (110.80 kg ha-1), phosphorus (112.25 kg ha-1), potassium (30.16 kg ha-1), gross returns (Rs. 75,022 ha-1) and net returns (Rs.51,964 ha-1).