Response of mustard (Brassica napus L.) to irrigation at different stages of growth
1996
Razzaque, M.A.(Bangladesh Agricultural Research Institute, Gazipur (Bangladesh). Irrigation and Water Management Div.) | Islam, M.S.(Bangladesh Agricultural Research Institute, Gazipur (Bangladesh). Irrigation and Water Management Div.) | Khan, B.R.(Bangladesh Agricultural Research Institute, Gazipur (Bangladesh). Irrigation and Water Management Div.) | Mondal, M.R.I.(Bangladesh Agricultural Research Institute, Gazipur (Bangladesh). Irrigation and Water Management Div.)
Experiment was conducted to find the critical growth stages of mustard (Brassica napus L.), responsive to irrigation and the amount of irrigated water required by an advanced napus line of mustard in silty clay soil of Joydebpur and silty loam soil of Jessore during the dry seasons of 1992-94. There were seven treatments with different times of irrigation along with the control having three replications. Averaging over both locations and years, the treatment with 3 irrigations, each at vegetative, flowering and siliqua filling stages produced the highest yield (1217 kg/ha). In 1993-94, this treatment obtained the yield of 1658 kg/ha. The yield reduced with reduction of irrigation number. The next lower yield was with two irrigations, each at flowering and siliqua filling stages. With 3 irrigations, in Joydebpur and Jessore, the yields were 746 and 804 kg/ha, respectively, in 1992-93. In 1993-94, the corresponding yields were 1633 and 1984 kg/ha. The plots with no irrigation had the lowest yields for both years and locations (in Jessore, 157 and 418 kg/ha and in Joydebpur, 1833 and 391 kg/ha). The seed yield for both locations in the 1992-93 were much lower than the average yield because of aphid infestation and sterility problem. The amount of seasonal irrigated water applied in the two years to the crop were 252 mm at Joydebpur and 1663 mm at Jessore.
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