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 |
Field experiments were conducted during kharif 2014 and 2015 at Agricultural Research Institute, Rajendranagar to determine the optimum irrigation schedule and nitrogen level for Bt cotton in alfisols in Southern Telangana. Irrigation at 0.8 IW/CPE recorded significantly higher plant height (97 cm), drymatter at first picking (220 g plant-1), bolls plant-1 (19), seed cotton yield (1700 kg ha-1), lint yield (626 kg ha-1), stalk yield (2282 kg ha-1) and nitrogen uptake (91 kg ha-1) and was not differed significantly with 0.4 IW/CPE and these were significantly superior to rainfed cotton. Among nitrogen levels, significantly higher plant height (109 cm), drymatter at first picking (247 g plant-1) stage, days to reach boll development (94 days) stage, bolls plant-1 (19), boll weight (4.7 g), seed index (9.1 g), seed cotton yield (1700 kg ha-1), lint yield (626 kg ha-1) and stalk yield (2282 kg ha-1) were found with application of nitrogen at 225 kg ha-1 was comparable with 150 kg N ha-1 and were significantly superior over lower levels of nitrogen application. The substantial increase in yield and yield attributes might be due to favorable effect on growth attributes like plant height, increased bolls plant-1, drymatter accumulation plant-1 and its subsequent translocation towards sink improved the seed cotton yield. It can be concluded that, higher seed cotton yield with higher net returns can be obtained with the irrigation scheduled at 0.4 IW/CPE and application of nitrogen at 150 kg ha-1 in Bt cotton grown in alfisols.
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