| Volume |
Issue |
Year |
Page No |
Type |
PDF Download |
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50
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3
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2018
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269
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272
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Research article
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Weed seed bank in soil as affected by different weed management practices in spring sweet corn
Prithwiraj Dey, Tej Pratap, Sudershan Mishra, Pramit Pandit
DOI :
http://dx.doi.org/10.5958/0974-8164.2018.00057.6
Email :
mailprithwi@gmail.com
Address :
G.B. Pant University of Agriculture & Technology, Pantnagar, Uttarakhand 263 145
Keywords
Atrazine
Sweet Corn
Tembotrione
Weed seed bank
Abstract
A field study was conducted in spring season of 2016 and 2017 on sweet corn to evaluate the effect of different weed management practices upon the weed seed bank dynamics in the soil. In the sample from seed bank studied, the per cent contribution of Cleome viscosa was highest among all the weed species before sowing and harvest stage of the crop and was followed by Dactyloctenium aegypticum, in both the stages and years. Depth wise weed seed distribution indicated highest weed seed in 10-15 cm depth before sowing and in 0-5 cm depth at harvest stage of the crop. Effect of all the weed control treatments upon previous season’s dormant seeds was non-significant. Twice hand weeding was effective to reduce seed bank in deeper layer. Atrazine 1000 g/ha followed by tembotrione 120 g/ha and tembotrione alone 120 g/ha had caused a significant reduction in weed seed number in 0-5 and 0-10 cm layer but weed seed number at 10-15 cm layer remained unchanged.