Influence of Fertilization Levels on Growth Attributes at Different Growth Stages of Bt-Cotton

A field experiment was conducted during kharif, 2013 at Agricultural College Farm, Raichur to study the influence of fertilization levels on yield and yield attributes of Bt-cotton (Gossypium hirusutum L.) under irrigated condition. The experimental design was laid out in randomized complete block (RCBD) with nine treatments replicated thrice. The results indicate that application of higher doses of nutrients i.e. 150% RDF (225: 112.5: 112.5 NPK kg/ha) recorded significantly higher plant height, more number of monopodial and sympodial branches and higher leaf area index (LAI) was observed. Similarly, significantly higher yield and yield components were recorded with application of 150% RDF i.e. number of bolls per plant (51.0), boll weight (6.56 g) and seed cotton yield (3237 kg/ha) followed by 150% RDN, 100% RDN, 50% RDN, 50% RDFand0% RDN. The lowest values were observed for all parameters from application of STCR (Target 2.0 t/ha) (0: 25.5: 24.4 kg NPK/ha).