Green Global
Foundation   Journal
...an emerging window for scientific research and publication across the globe

WEED COMPOSITION AND YIELD PERFORMANCE OF BORO RICE INFLUENCED BY TILLAGE METHODS AND WEEDING REGIME (Pages : 19 - 29)

Tillage has an important role in reducing crop weed competition and increasing crop yield. Therefore, an experiment was designed using split plot design to investigate the effect of tillage and weeding regimes on weed dynamics and yield of boro rice and repeated for three times. The experiment included four tillage methods viz. conventional tillage, false seedbed, stale seedbed and conservation tillage, assigned in the main plots and seven weeding regimes viz. no weeding, two hand weedings (HW) at 25 DAT and 50 DAT, super power as early post-emergence herbicide + HW at 25 DAT, granite as post-emergence herbicide + HW at 50 DAT, super power followed by (fb) granite, super power fb granite + HW at 50 DAT and weed free, assigned in sub plots. Total number of infested weeds were 29 belonging to 11 families of which Poaceae family was dominant. Irrespective of sampling dates, the plots under conventional tillage, false seedbed, stale seedbed and conservation tillage were infested with 24, 25, 22 and 27 weeds, respectively. Conventional tillage produced the highest yield (6.31 t ha-1) along with other yield contributing characters and the lowest yield (5.59 t ha-1) was obtained from conservation tillage. Besides, Super power fb Granite + HW at 50 DAT produced the highest yield (6.34 t ha-1). Considering interaction effect, combination of conventional tillage with Super power followed by Granite + HW at 50 DAT gave the best performance in terms of yield attributes and yield (6.5 t ha-1). Therefore, it may be concluded that conventional tillage with Super power fb Granite + hand weeding at 50 DAT could be the promising technology to manage weeds effectively and also to obtain higher yield of boro rice. However, further studies in different agro-ecological zones are needed to draw any concrete conclusions. Download