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Journal of Applied Sciences
  Year: 2019 | Volume: 19 | Issue: 7 | Page No.: 654-661
DOI: 10.3923/jas.2019.654.661
 
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Effect of Seeding Depth and Weed Management Options on Weed Control and Yield Performance of Dry Direct Seeded Rice

Md. Moshiur Rahman and Md. Mehedi Masood

Abstract:
Background and Objective: Rice cultivation using the conventional puddled transplanted system is no longer sustainable in Bangladesh due to shortage of irrigation water. Dry direct seeding is an alternative system that provides the avenue of rice cultivation using less than 50% irrigation water. However, weed is the major constraint to the adoption of dry direct seeded rice (DDSR) system. Manual weeding is tedious and costly. Herbicidal weed control is very easy and economic. However, reliance on only herbicide creates environmental hazard. In this situation, integration of cultural, mechanical and chemical methods for controlling weed is required to reduce weeding cost and dependency on herbicide. Materials and Methods: Three seeding depths viz. 2 cm (D1), 5 cm (D2) and 8cm (D3) and (b) seven weed management options viz., no weeding ( M1), Four hand weeding at 20, 35, 50 and 65 DAS (M2), Blade weeding plus three hand weeding at 20, 35 and 50 DAS (M3), Blade and rake plus three hand weeding at 20, 35 and 50 DAS (M4), Sirius 10 wp (Pyrazosulfuron-ethyl) at 125 g ha1 with one hand weeding at 20 DAS fb Sirius (M5), Top (Pretilachlor) at 1 L ha1 with one hand weeding at 20 DAS fb Top (M6), Panida (Pendimethalin) at 2.5 L ha1 with one hand weeding at 20 DAS fb Panida (M7) were included in a split-plot design with three replications. Results: The results revealed that seeding depth and weed management options had significant interaction effect on grain yield and weed density and dry matter. The lowest weed density and dry matter was found with seeding of rice seed at 5 cm and application of Pendimethalin at 1 DAS followed by one hand weeding at 20 DAS plus application of Pendimethalin again just after weeding gave the lowest weed density and matter and resulted in highest rice yield among the treatment combinations. Conclusion: It may be concluded that sowing at 5 cm depth and pre-emergence application of Pendimethalin followed by a hand weeding at 20 DAS fb Pendimethalin application could be considered as the best way to control weeds in dry direct seeded rice.
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How to cite this article:

Md. Moshiur Rahman and Md. Mehedi Masood, 2019. Effect of Seeding Depth and Weed Management Options on Weed Control and Yield Performance of Dry Direct Seeded Rice. Journal of Applied Sciences, 19: 654-661.

DOI: 10.3923/jas.2019.654.661

URL: https://scialert.net/abstract/?doi=jas.2019.654.661

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