Effect of source of irrigation water on yield performance of Boro rice

Abstract

Industrial wastewater is a major problem in Gazipur, Bangladesh which is very cheaply available in the surrounding area for crop production. An experiment was conducted at Farmer’s Field of Gazipur district to study the effect of irrigation water quality on yield of boro rice. The study comprised three varieties viz., BR14, BRRI dhan28 and BRRI dhan29 and three sources of irrigation water viz. fresh water irrigation, mixed water (fresh + industrial wastewater) irrigation, industrial wastewater irrigation. The experiment was laid out in a split-plot design with three replications where irrigation water was assigned in the main plot and rice varieties in the subplot. BRRI dhan29 produced the tallest plant (85.25 cm), the highest number of total tillers hill-1 (19.77), effective tillers hill-1 (17.64), grains panicle-1 (111.0), sterile spikelets panicle-1 (44.29), 1000-grain weight (22.43 g), grain yield (4.56 t ha-1) and straw yield (7.99 t ha-1). On the other hand, plant height (74.50 cm), total tillers hill-1 (19.82), effective tillers hill-1 (17.53), grains panicle-1 (131.7), sterile spikelets panicle-1 (35.50), 1000-grain weight (25.83 g), grain yield (5.05 t ha-1) were found highest when applied fresh water irrigation. The highest numbers of grains panicle-1 (119.14), 1000-grain weight (25.10 g), grain (5.54 t ha-1) and straw (7.93 t ha-1) yield were obtained in BRRI dhan29 with fresh water irrigation. Therefore, BRRI dhan29 with fresh water irrigation would be safe to use. However, if fresh water irrigation is not possible, conjunctive use of fresh and wastewater can be used as irrigation for BRRI dhan29.