Ecology, Environment and Conservation Paper

YIELD AND YIELD COMPONENTS, QUALITY PARAMETERS, UPTAKE OF NUTRIENTS AND ECONOMICS OF IRRIGATED BT COTTON (GOSSYPIUM HIRSUTUML.) AS INFLUENCED BY MACRO NUTRIENTS AND LIQUID FERTILIZERS

Vinayak Hosamani, A.S. Halepyati and S.N. Vinodakumar

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 seed cotton yield (19.25 q ha -1 ), mean boll weight (4.13g), number of good and bad opened bolls (22.15 and 4.02 ), total number of bolls (26.19), ginning percentage (36.17), harvest index (0.34), seed index (9.93), 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 (17.04 q ha -1 , 94.86 g plant -1 , 3.89, 20.14, 4.31, 24.42, 35.62, 0.28, 9.88, 103.00 kg ha -1 26.80 kg ha -1 ,104.53 q ha -1 and Rs. 70,505 ha -1 and Rs.48,723 ha -1 , respectively). Among foliar spray of liquid fertilizers foliar spray of Bio 20 @ 3 mL/L recorded the highest seed cotton yield (18.10 q ha -1 ), mean boll weight (4.06 g), number of good and bad opened (21.17 and 3.70) bolls, total number of bolls (24.88), 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 ).