ABSTRACT

A modem wheat variety BARI GAM-19 (Sourov) was grown with six rates of flobond, a chemical water retainer, viz., 0.0, 0.5, 1.0, 2.0, 4.0 and 8.0 g pot-1 under three levels of irrigation viz., control, one irrigation at 18 DAS (days after sowing), two irrigations at 18 DAS and 55 DAS, three irrigations at 18 DAS, 55 DAS and 80 DAS at the net house of the Department of Agronomy, Bangladesh Agricultural University, Mymensingh. Rate of flobond and irrigation level and their interaction exerted significant influence on yield, yield contributing and other crop characters. It was observed that the highest grain yield (3.06 t ha-1) was obtained with 2 g flobond pot-1 (332 kg ha-1). It was the outcome of the highest effective tillers plant-1 and highest number of grains spike-1. Grain yield showed an increasing trend up to 2 g flobond pot-1 (332 kg ha-1) and thereafter, it may identical.  Considering, irrigation frequencies the highest grain yield (3.41 t ha-1) was obtained with two irrigations. Interaction of rate of flobond as chemical water retainer and level of irrigation had significant effect on yield, yield contributing and other crop characters except plant height, spike length, 1000-grain weight. However, the highest grain yield (3.58 t ha-1) was obtained with two irrigations coupled with 2 g flobond pot-1 (332 kg ha-1) as chemical water retainer and the lowest one (1.37 t ha-1) was obtained in no flobond and no irrigation.

Key words: Flobond, irrigation, wheat, yield.

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