Vol. 6, Issue 4 (2018)
Response of growth and yield of Bt cotton to planting densties as influnced by growth regualtors
Author(s): OS Khetre, VS Shinde, BV Asewar and Mirza IAB
Abstract: The present investigation was carried out at Department of Agronomy, Parbhani to study Response of growth and yield of Bt cotton to planting densties as influnced by growth regualtors during 2014-15 and 2015-16. 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 growth attributes i.e., number of functional leaves, dry matter per plant (g), number of monopodial and number of sympodial branches per plant and 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. The significantly taller plants was recorded with plant spacing of 90 x 15 cm as compared to other plant spacing’s. Similarly maximum seed cotton yield (kg ha-1) was 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. The plant height was significantly lower with application of mepiquat chloride (50 g ha-1) at square formation and flowering (G3) as compared to other growth regulator treatments. Significantly higher number of sympodial branches per plant, 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 number of functional leaves per plant and dry matter accumulation per plant were recorded with application of nitrobenzene (400 ppm) at square formation and flowering (G5).
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How to cite this article:
OS Khetre, VS Shinde, BV Asewar, Mirza IAB. Response of growth and yield of Bt cotton to planting densties as influnced by growth regualtors. Int J Chem Stud 2018;6(4):485-488.
