National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692 Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
A field experiment was conducted to study the influence of different agronomic practices on growth, yield attributes and yield of Bt cotton at the Main Agricultural Research Station, Raichur during Kharif 2016. Nine treatments comprising of normal spaced and fertilized non-Bt (cv. RAHH-455) and Bt hybrid (cv. Bindas) in addition to closer spacing Bt hybrid supplied with 125 % of recommended nutrients (187.5: 92.75: 92.75 kg N:P2O5:K2O ha-1), foliar spray of 1% MgSO4 twice and 1% KNO3 thrice, soil application of MgSO4 (25 kg ha-1) and FeSO4 (10 kg ha-1) and ZnSO4 (10 kg ha-1), foliar spray of 1% MgSO4 + 1% 19:19:19 or 1% KH2PO4 and polyethylene mulching replicated thrice. The results revealed that closer spaced Bt hybrid + 125 % RDF + 3 sprays of 1% each of MgSO4 and 19:9:19 and polyethylene mulching recorded significantly higher plant height (159.2 cm), monopodia (2.0), sympodia (27.7), total dry matter production (347.0g), leaf area index (1.81), number of bolls plant-1 (48.27) and seed cotton yield (4122 kg ha-1) compared to other nutritional treatments. It also registered higher net returns (₹ 1,59,296 ha-1), gross returns (₹ 2,22,588) and B:C ratio (3.52). It was followed by closer spaced Bt hybrid + foliar spray of 1% KH2PO4 thrice.
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