Influence of Weeding on the Performance of White Maize Varieties

摘要

The experiment was conducted at agronomy farm of Sher-e-Bangla Agricultural University, Dhaka from November 2017 to April 2018 to investigate the influence of weeding regimes on the performance of white maize varieties. The experiment comprised two varieties viz . YANGNUO-3000 and PSC-121, designated as V _( 1 ) and V _( 2 ) respectively combined with four weed control treatments viz. T _( 0 ) = No weeding, T _( 1 ) = One hand weeding at 60 DAS (days after sowing), T _( 2 ) = two hand weeding at 40 DAS and 60 DAS and T _( 3 ) = Weed free after 40 DAS. The experiment was laid out in RCBD (factorial) with three replications. PSC-121 showed the superior performance in terms of plant height, leaf number plant ~( -1 ) , number of grains cob ~( -1 ) (468.75), 100 grains weight (35.0837 g), grain yield (8.28 t ha ~( -1 ) ), stover yield (6.56 t ha ~( -1 ) ) and harvest index (55.58%) over YANGNUO-3000. In the case of weed control treatments, the highest plant height, leaf number plant ~( -1 ) , number of grains cob ~( -1 ) (464.54), 100 grains weight (37 g), grain yield (9.25 t ha ~( -1 ) ) and stover yield (7.46 t ha ~( -1 ) ) were reported from T _( 3 ) . All the parameters studied were found lowest with T _( 0 ) . However, in terms of interaction, no single interaction was superior to other alternatives. But in most of the cases V _( 2 ) T _( 3 ) showed the highest values regarding the maximum plant height, leaf number plant ~( -1 ) , number of grains cob ~( -1 ) (494.97) and 100 grains weight (38 g). V _( 2 ) T _( 3 ) showed the highest grain yield (9.33 t ha ~( -1 ) ), whereas, V _( 1 ) T _( 0 ) showed the lowest grain yield (5.49 t ha ~( -1 ) ). The lowest weed density and weed biomass (12.17 no. m ~( -2 ) and 4.33 g·m ~( -2 ) ) was recorded from T _( 3 ) . The highest weed control efficiency (94.38%) was also recorded from T _( 3 ) . In the case of variety V _( 2 ) showed better performance in terms of weed density, weed biomass and WCE (46.32%).