Vol. 10, Issue 12 (2021)

Author(s):
Shipra Yadav, RB Yadav, RK Naresh, M Sharath Chandra and Rahul Kumar

Abstract:
A field experiment was conducted at Crop Research Center of Sardar Vallabhbhai Patel University of Agriculture & Technology, Meerut (U.P.), to study the effect of crop establishment methods and weed management options on weed dynamics and performance of Basmati rice (Oryza Sativa L.) during the kharif season of 2019 and 2020. The experiment was laid out in split plot design with three main factors viz., (1) Conventional Puddled Transplanting (CPT), (2) Unpuddled Flat (UPF) and (3) Furrow Irrigated Raised Beds (FIRB) and five sub factors viz., (1) Pretilachlor @ 0.75 Kg ha^-1 PE fb Bispyribac sodium @ 20 g a.i. ha^-1 POE at 20 DAT, (2) Almix 4 g a.i. ha^-1 + Bispyribac sodium @ 20 g a.i. ha^-1 POE at 20 DAT, (3) Bispyribac sodium @ 25 g a.i. ha^-1 POE at 20 DAT, (4) Two hand Weedings and (5) Weedy check, the experiment was replicated by four replications. The effect of different crop establishment methods at different observation dates was significant. Yield, nutrient uptake and economics of rice was significantly influenced by crop establishment methods and weed management practices. Higher yield was found under conventional puddled transplanting which was significantly higher than the unpuddled flat and at par with furrow irrigated raised bed method during both the years. Among the weed management practices the highest yield was obtained with pretilachlor @ 0.75 Kg ha^-1 fb Bispyribac sodium @ 20 g a.i. ha^-1 which was statistically at par with Almix 4 g a.i. ha^-1 + Bispyribac sodium @ 20 g a.i. ha^-1 and two hand Weedings followed by Bispyribac sodium @ 25 g a.i. ha^-1 in both the years. However lowest rice yield was obtained in weedy check. Highest NPK uptake was recorded under conventional puddled transplanting with the application of Pretilachlor @ 0.75 Kg ha^-1 fb Bispyribac sodium @ 20 g a.i. ha^-1. The higher net return and B: C ratio was associated with the rice transplanted on furrow irrigated raised beds with Pretilachlor @ 0.75 Kg ha^-1 fb Bispyribac sodium @ 20 g a.i. ha^-1 was applied.