GROWTH & YIELD RESPONSE OF DIRECT-SEEDED RICE (ORYZA SATIVA L.) CULTIVARS UNDER DIFFERENT SOWING METHODS AND WEED MANAGEMENT METHODS
Journal Title: International Journal of Agriculture Sciences - Year 2016, Vol 8, Issue 8
Abstract
Field experiments were conducted during kharif season of 2009 and 2010 at SASRD, NU, Medziphema Campus, Nagaland, to study the response of direct-seeded rice (Oryza sativa L.) cultivars towards different sowing and weed management methods. The dominant weed species were Digitaria setigera Roth ex Roem. & Schult, Cynadon dactylon (L.) Pers., Cyperus rotundus L., Borreria articularis (L. f.) F. N. Will. and Ipomoea triloba L. Line sowing was found superior over broadcasting in reducing weed growth and exhibited better crop growth attributes and yield attributes and also recorded higher grain yield (2.85 t/ha during 2009 & 3.00 t/ha during 2010). The cultivar ‘Kezie’ was found to effectively suppress weed growth and recorded significantly higher tillers/m2, panicles/m2 and filled grains/panicle and grain yield (2.50 t/ha during 2009 & 2.61 t/ha during 2010) over ‘Leikhumo’. Weed management treatment hand weeding at 20 and 40 DAS (Days after sowing) effectively minimized weed population and dry weight and recorded the highest the weed control efficiency (92.57% during 2009 & 94.64% during 2010) as well as grain yield (3.42 t/ha during 2009 & 3.57 t/ha during 2010). The highest gross return/ha and net return/ha (Rs.22265/ha during 2009 & Rs.24360/ha during 2010) and also the highest BCR (benefit cost ratio) (2.26 during 2009 & 2.38 during 2010) was recorded by the cultivar ‘Kezie’ in combination with line sowing and hand weeding at 20 & 40 DAS.
Authors and Affiliations
N. KIKON
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