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Asian Journal of Plant Sciences
Year: 2007  |  Volume: 6  |  Issue: 1  |  Page No.: 153 - 157

Response of Cotton Cultivars to Varying Irrigation Regimes

M.H. Siddiqui, F.C. Oad and U.A. Buriro    

Abstract: A field experiment was conducted to examine the effect of different irrigation regimes on the growth and yield of various cotton cultivars at Students Farm, Sindh Agriculture University Tandojam, Pakistan. Three irrigation regimes viz. 3, 5 and 7 irrigations were examined against three cultivars i.e., TH-41/83, TH-224/87 and NIAB-78. The results revealed that most of the quantitative characters of cotton varieties viz. plant height, number of sympodial branches, number of bolls plant-1, seed cotton yield plant-1 and seed cotton yield ha-1 were affected significantly (p<0.01), while non-significant effects were recorded in case of monopodial branches, GOT % and staple length. In case of 7 irrigations, the average values were highest for plant height (105.56 cm), monopodial branches (1.67) plant-1, sympodial branches (21.22) plant-1, bolls (54.44) plant-1, staple length (28.21 mm), while in case of 5 irrigations highest values were recorded for GOT (35.07 %), seed cotton yield plant-1 (39.46 g) and seed cotton yield (3323.52 kg ha-1). In case of cotton cultivars, TH-41/83 and TH-224/87 produced plant height of 109.22 and 109.22 cm, monopodial branches 1.69 and 1.44 plant-1, sympodial branches 16.89 and 18.22 plant-1, number of bolls 43.00 and 46.78 plant-1, GOT 34.69 and 34.69 %, staple length 27.94 and 28.11 mm, seed cotton yield plant-1 35.89 and 37.00 g, seed cotton yield ha-1 of 2600.55 and 2597.37 kg, respectively. While comparing the growth and yield contributing characters of above two cultivars with commercial cultivar NIAB-78, it produced plant height of 71.28 cm, monopodial branches 1.67 plant-1, sympodial branches 16.78 plant-1, number of bolls 47.20 plant-1, GOT 35.64%, staple length 27.90 mm, seed cotton yield plant-1 39.60 g and seed cotton yield ha-1 of 2823.13 kg, respectively. It was observed that cotton crop irrigated five times produced significantly economical overall performance as compared to 7 irrigations or 3 irrigations and though NIAB-78 was relatively a dwarf cultivar but it yielded significantly better than TH-41/83 and TH-224/87.

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