Vol. 6, Issue 4 (2018)
Studies of yield and economic parameters as influnced by planting densities and growth regulators in Bt cottonx`
Author(s): OS Khetre, VS Shinde, BV Asewar and Mirza IAB
Abstract: A field research trial was conducted at Agronomy farm, Department of Agronomy, VNMKV, Parbhani during during 2014-15 and 2015-16. Present investigation was carried out to Studies of yield and economic parameters as influenced by planting densities and growth regulators in Bt cotton. The soil of the experimental plot was clayey in texture, low in available nitrogen, medium in available phosphorus and high in available potassium and slightly alkaline in reaction. The experiment was laid out in split plot design with four plant densities i.e. S1-120 x 45 cm (18518 plants ha-1), S2-90 x 45 cm (24691 plants ha-1), S3-90 x 30 cm (37037 plants ha-1) and S4-90 x 15 cm (74074 plants ha-1) and six growth regulator treatments G1- CCC (60 ppm) at square formation and flowering, G2- CCC (60 ppm) at flowering and boll formation, G3- Mepiquat chloride (50 g ha-1) at square formation and flowering, G4- Mepiquat chloride (50 g ha-1) at flowering and boll formation, G5- Nitrobenzene (400 ppm) at square formation and flowering, G6- Nitrobenzene (400 ppm) at flowering and boll formation. Study revealed that the plant spacing of 120 x 45 cm recorded significantly increased yield contributing characters i.e. number of picked bolls per plant, boll weight (g), seed cotton yield per plant (g) over rest of the spacings. Similarly maximum seed cotton yield (kg ha-1), GMR NMR and B;C ratio were recorded with plant spacing of 90 x 30 cm than plant spacing’s of 90 x 45 cm, 120 x 45 cm and 90 x 15 cm.. Significantly higher number of picked bolls, seed cotton yield per plant (g) and boll weight were improved due to application of mepiquat chloride (50 g ha-1) at square formation and flowering (G3) as compared with other growth regulator. While significantly higher seed cotton yield per ha, GMR NMR and B;C ratio was recorded with application of mepiquat chloride (50 g ha-1) at square formation and flowering (G3) as compared to other growth regulators treatments.
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How to cite this article:
OS Khetre, VS Shinde, BV Asewar, Mirza IAB. Studies of yield and economic parameters as influnced by planting densities and growth regulators in Bt cottonx`. Int J Chem Stud 2018;6(4):711-714.
