Author(s):

Sanjay Kumar, Nareshmani Pandey, Ashok Kumar Singh and Ghanshyam Singh

Abstract: A field experiment was conducted during Kharif season of two consecutive years of 2015 and 2016 to find out the comparative understanding of the effect of various rice establishment methods and weed management practices in direct seeded rice. The major weed flora recorded were E. crus galli, E. colona and P. maximum of grassy, Commelina benghalensis L. and Eclipta alba of broad leaved group and Cyperus spp. of sedges group. However, grassy weeds were dominant over other weeds species. Lower values of weed density and dry weight, yield and yield attributes of crop were recorded significantly due to manual weeding thrice, and pretilachlore @ 750g/ha at 0-2DASfbalmix @ 4 g/ha at 25DAS (3-4 leaf stage of rice crop) being at par at all characters during both the years. Both the establishment methods (wet) drum seeding and broadcasting being at par recorded significantly lower values of weed density, weed dry weight and higher values of growth and yield attributes, grain and straw yield over dry seeding methods during both the years. Various weed management practices influenced the nitrogen uptake by weed and crop significantly. Whereas total N uptake by weed definitely in more weed population treatments and higher N uptake by crop weed free and pretilachlore @ 750g/ha at 0-2DASfbalmix @ 4 g/ha at 25DAS (3-4 leaf stage of rice crop) that means less competition. On the basis of two years experimentation, it may be concluded that higher values of grain yield may be obtained due to drum seeding methods of establishment of rice along with integrated method of using weed management by pretilachlore @ 750g/ha at 0-2DASfbalmix @ 4 g/ha at 25DAS (3-4 leaf stage of rice crop), while, broadcasting (wet) showed the same response. However, for resource poor farmers, direct seeding of rice through drum along with pretilachlore @ 750g/ha at 0-2DASfbalmix @ 4 g/ha at 25DAS (3-4 leaf stage of rice crop) proved superior (BCR values of Rs 2.12 per ha) over other methods of rice establishment under puddled condition.

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