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Issue |
Year |
Page No |
Type |
PDF Download |
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49
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3
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2017
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287
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289
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Short communications
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Nutrient uptake by rice and weeds as influenced by different weed management practices in dry-seeded rice
K. Hemalatha, A.V. Ramana, K.V. Ramana Murthy and J. Jagannadam
DOI :
http://dx.doi.org/10.5958/0974-8164.2017.00075.2
Email :
kutikuppalahemalatha@gmail.com
Address :
Department of Agronomy, Acharya N.G. Ranga Agricultural University, Agricultural College, Naira, Andhra Pradesh 532 185
Keywords
Dry-seeded rice, Herbicides, Nutrient uptake, Weeds
Abstract
Among the herbicides, application of orthosulfamuron 100 g/ha was effective in suppressing sedges and broad-leaved weeds, metsulfuron-methyl + chlorimuron-ethyl 4 g/ha was effective in suppressing broad-leaved weeds and sequential application of pendimethalin 0.75 kg/ha at 3-5 DAS fb metsulfuron-methyl + chlorimuron-ethyl 4 g/ha at 20-25 DAS performed better in controlling weeds resulting in higher weed control efficiency and lower weed index when compared to alone application of herbicides either as pre-emergence and post-emergence. Pre-emergence application of pendimethalin 0.75 kg/ha at 3-5 DAS fb metsulfuron-methyl + chlorimuron-ethyl 4 g/ha as post-emergence at 20-25 DAS, was evidenced higher grain yield and higher uptake of nutrients in crops and lower uptake of nutrients i.e., N, P and K in weeds.