Weed management through oxyfluorfen in direct seeded rice and its impact on soil micro-organisms and succeeding crops

摘要

A field experiment was conducted during rainy seasons of 2009 and 2010 at Kalyani C-Block Fam of BCKV, Mohanpur, West Bengal, to evaluate the bio-efficacy of oxyfluorfen and its impact on soil micro-organisms and succeeding crop in direct seeded rice. The experiment was carried out with 7 treatments viz. Control (no weeding); Check-oxyfluorfen @ 200 g/ha; T_3, Oxyfluorfen @ 150 g/ha; T_4, Oxyfluorfen @ 200 g/ha; T_5, Oxyfluorfen @ 250 g/ha; T_6, Oxyfluorfen @ 300 g/ha; T_7, Oxyfluorfen @ 400 g/ha. The results showed that the treatment T_7 controlled the weeds most effectively which produced the highest seed yield. The micro-flora population was affected after application of herbicides, but later it reached to a higher level. There was no influencedon the succeeding crop in terms of plant population, but T_4treatment resulted in higher yield of all the succeeding crops.