National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
A field experiment was conducted at Norman E. Borlaug Crop Research Centre, G. B. Pant University of Agriculture and Technology, Pantnagar, U.S. Nagar (Uttarakhand) during kharif seasons of 2011and 2012 to study the effect of crop establishment methods and weed management practices on weed dynamics and productivity of rice. The results revealed that the lowest density and dry matter of total weeds at 60 days after sowing/days after transplanting was obtained with transplanted rice. This treatment produced the highest number of panicles/m2 and rice grain yield (4145 and 3879 kg/ha). Among the weed management practices, application of bispyribac sodium 20 g/ha at 15 DAS/DAT followed by (fb) one HW at 35 DAS/DAT being on par to the application of penoxsulam 22.5 g/ha at 2-3 leaf stage of weeds fb one HW at 35 DAS/DAT recorded the minimum population and dry matter of total weeds and recorded the highest weed control efficiency. This treatment produced the significantly higher number of panicles/m2, grains/panicle and grain yield. Crop establishment methods and weed management practices interacted significantly and significantly higher grain yield was recorded with transplanted rice in combination with the application of bispyribac sodium 20 g/ha at 15 DAS/DAT fb one HW at 35 DAS/DAT or penoxsulam22.5 g/ha at 2-3 leaf stage of weeds fb one HW at 35 DAS/DAT.
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