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Year : 2022, Volume : 14, Issue : 2
First page : ( 144) Last page : ( 153)
Print ISSN : 0975-2315. Online ISSN : 2394-4471. Published online : 2022 December 18.
Article DOI : 10.5958/2394-4471.2022.00029.6

Enhancing fibre yield and nutrient use efficiency of jute by managing diversified weed-flora in Eastern Himalayan foothill

Kheroar S1,*, Sarkar P1, Das S1, Mandal K1, Barman SK1, Mitra S2

1All India Network Project on Jute and Allied Fibres, Uttar Banga Krishi Viswavidyalaya, Cooch Behar, 736 165, (West Bengal), India

2ICAR-Central Research Institute for Jute and Allied Fibres (CRIJAF), Kolkata-700 120, (West Bengal), India

*S Kheroar (Corresponding author) kheroarshyamal@gmail.com

Online Published on 18 March, 2023.

Received:  19  October,  2022; :  29  November,  2022; Accepted:  29  November,  2022.

Abstract

Severe prevalence of multi-flush weed pressure reduces 60-70% fibre yield in jute. Increasing productivity and profitability of jute while decreasing production cost and control weeds population are emerging challenges for jute cultivation in eastern India. A study was conducted in 2017 and 2018 at the Uttar Banga Krishi Viswavidyalaya, Cooch Behar, India, to evaluate the efficacy of sole and sequential applications of pre-emergence (ipfencarbazone) and post-emergence (quizalofop ethyl and ethoxysulfuron) herbicides in comparison to hand weeding in jute. The sequential application of herbicides reduced weed density and biomass by 62-94% compared to non-treated plots, whereas, sole application of herbicides reduced weed density by 54-70% and weed biomass by 44-73%. All herbicide treatments and hand weeding significantly affected plant height, basal diameter, agronomic indices, nutrient acquisition and fibre yield of jute. The highest fibre yield was obtained in the weed-free plots (3.62-3.89 t ha-1) and the plots treated with Ipfencarbazone followed by (fb) Quizalofop ethyl + ethoxysulfuron (3.24-3.43 t ha-1) and Ipfencarbazone fb Ethoxysulfuron (3.02-3.12 t ha-1). The lowest fibre yield (1.20-1.36 t ha-1) was achieved in the non-treated plots. Ipfencarbazone fb quizalofop ethyl + ethoxysulfuron recorded highest net return ( 75111- 79854 ha-1) and benefit: cost ratio (2.68-2.99). The results suggest that ethoxysulfuron is the best broad-spectrum and economically effective herbicide when applied in combination with other effective pre and post-emergence herbicides with different modes of action, depending on the weed species present in the jute field.

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Keywords

Fibre yield, Nutrient uptake, Nutrient use efficiency, Weed diversity, Weed management index, Jute.

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