Impact of direct seeding methods and weed management strategies on growth and yield of upland rice (Oryza sativa)
DOI:
https://doi.org/10.59797/ija.v70.i3.5628Keywords:
Growth, Herbicide, Line Sowing, YieldAbstract
A field experiment was conducted at the Research cum Instructional Farm, S.G. College of Agriculture and Research Station, Jagdalpur, IGKV, Chhattisgarh, during the kharif season of 2023 in a split-plot design. The treatments included three main plots: M1 (Broadcasting), M2 (Line sowing), and M3 (Semi-dry condition), and five subplots: W1 [Pre-emergence herbicide (Pretilachlor @ 750 g ai/ha) at 3 DAS + 1 hand weeding (HW) at 15 DAS], W2 [Post-emergence herbicide (Trifloxysulfuron + Ethoxysulfuron @ 67.5 g ai/ha) at 15 DAS + 1 HW at 30 DAS], W3 (W1+W2), W4 (weed-free), and W5 (weedy check). In terms of seeding techniques, all crop growth parameters and indices such as plant height, number of tillers, dry matter accumulation, leaf area index, and crop growth rate were recorded highest in the line sowing treatment, which was found to be statistically on par with the semi-dry condition. Data revealed that all yield-attributing characters, including panicle length, number of grains per panicle, test weight, grain yield, and straw yield were recorded significantly higher in the M2 (Line sowing) treatment, which was statistically on par with the M3 (Semi-dry condition) treatment. Among weed management practices, W3 treatment (Pre-emergence herbicide as Pretilachlor @ 750 g ai/ha + 1 HW at 15 DAS, followed by post-emergence herbicide Trifloxysulfuron + Ethoxysulfuron @ 67.5 g ai/ha + 1 HW at 30 DAS) recorded the highest growth and yield-attributing traits, which were on par with W2 (Post-emergence of Trifloxysulfuron + Ethoxysulfuron @ 67.5 g ai/ha + 1 HW at 30 DAS).
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