This article Citation:

Yerradoddi Sindhu Sree, Anjan K. Sarmah and I.C. Barua . 2021. Organic weed management in wet-seeded and transplanted aromatic rice . Indian Journal of Weed Science : 53( 4) 426- 429.







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Volume Issue Publication year Page No Type of article
53 4 2021 426-429 Research note
Organic weed management in wet-seeded and transplanted aromatic rice

Yerradoddi Sindhu Sree, Anjan K. Sarmah and I.C. Barua

DOI: http://dx.doi.org/10.5958/0974-8164.2021.00078.2

Email: srisindhu4784@gmail.com
Address: Department of Agronomy, Assam Agricultural University Jorhat, Assam 785013, India

Keywords:

Aromatic rice, Inter cropping, Dhaincha, Organic weed management, Sesbania aculeata L., Transplanted rice, Wet-seeded rice



Abstract:

A field experiment was conducted during rainy (Sali) season of 2019 in organic block of Instructional-cum-Research farm of the Assam Agricultural University, Jorhat to study the effect of organic weed management practices on weeds, rice growth, yield attributes and yield of aromatic rice (Oryza sativa L. cv Kola Joha) established by wet-seeding and transplanting. The experiment was laid out in split-plot design with main plots of two rice establishment methods, i.e., direct wet-seeding (WSR), puddled transplanting (PTR) and sub plots of five organic weed management practices, viz. weedy check, hand weeding at 20 and 40 days after transplanting (DAT) / seeding (DAS), weeding with rotary weeder at 20 and 40 DAT/DAS, weeding with cono-weeder at 20 and 40 DAT/DAS and intercropping of Sesbania (Sesbania aculeata L.) and its incorporation at 40 DAT/DAS. The puddled transplanting method of rice establishment resulted significantly higher rice grain yield (1.82 t/ha), decreased weed density and biomass compared to the direct wet-seeding method. The hand weeding twice at 20 and 40 DAT/DAS produced the highest grain yield (2.19 t/ha), maximum weed control efficiency and weed control index. The next best was the intercropping of Sesbania and its incorporation at 40 DAT/ DAS (1.69 t/ha), which recorded the highest B:C ratio (2.61) under the puddled transplanting system of rice establishment.





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