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An experiment was conducted to determine the response of three rice varieties to different water management systems. The rice varieties V1 (Binadhan-8), V2 (Binadhan-10), and V3 (BRRI dhan28) were grown with maintaining four Alternate Flooding and Wetting (AFW) irrigation treatments i.e I1 (Continuous saturation), I2 (Alternate flooding and wetting at 6 days after disappearance of 4 cm water), I3 (Alternate flooding and wetting at 9 days after disappearance of 4 cm water), and I4 (Alternate flooding and wetting at 12 days after disappearance of 4 cm water). The treatments were arranged in a split-plot design (SPD) with three replications. Varieties and water management systems exerted the significant effect on the plant growth, yield, and yield contributing characters of rice. The highest grain yield (6.84 t ha-1) was obtained in V2 (Binadhan-10). In respect of water management systems, alternate flooding and wetting at 9 days after the disappearance of 4 cm water (I3) produced maximum grain yield (6.92 t ha-1). It was also found that the rice grown at continuous saturation (I1) treatment did not increase the yield, rather caused the wastage of irrigation water. The highest (0.278 t ha-1 cm-1) water productivity was found in treatment I4 but not grain yield. In treatment I4, irrigation was applied only at critical stages of rice consequently, the minimum amount of water was used and decreased the yield. On the contrary, the highest yield (6.92 t ha-1) was observed in I3 treatment because of the optimum use of water and non-stress condition.
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