Vol. 6, Issue 3 (2018)
Effect of non-chemical weed management and planting geometry on weed density, weed biomass, grain yield and nutrient removal by weed in dry direct seeded rice (Oryza sativa L.) cultivars
Author(s): Mona Nagargade, MK Singh and Vishal Tyagi
Abstract: Field studies were carried out from 2015 and 2016 at Agricultural Research Farm, Banaras Hindu University Varanasi, Uttar Pradesh, India to evaluate the effect of non-chemical weed management and planting geometry on weed density, weed biomass, grain yieldand nutrient removal by weed in dry direct seeded rice (Oryza sativa L.) cultivars. The experiment consisted of two planting geometry (Seed drill sown crop and square planting), two cultivars (Arize 6444 and PHB 71) and five non-chemical weed management treatment viz., weedy, one hoeing at 12 DAS fb hand weeding at 30 DAS, one hoeing at 12 DAS fb Sesbania co-culture and incorporated at 45 DAS, one hoeing at 12 DAS fb straw mulching 4 t/ha fb hand weeding at 40 DAS, one hoeing at 12 DAS fb straw mulching 6 t/ha. The dominant weed flora of experimental field were Cynodon dactylon, Echinochloa colona and Echinochloa crus Galli among the grasses, Cyperus iria, Cyperus difformis and Fimbristylis miliacea among sedges and Ammannia baccifera, Caesulia axillaris and Phyllanthus fraternus among broad-leaved weeds during both the years. The result revealed that square planting, Arize 6444 cultivar and one hoeing at 12 DAS fb hand weeding at 30 DAS had significantly lower weed density, weed biomass and nutrient removal by weed at 90 DAS and higher grain yield during both years.
Pages: 1311-1316 | 498 Views 63 Downloads
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How to cite this article:
Mona Nagargade, MK Singh, Vishal Tyagi. Effect of non-chemical weed management and planting geometry on weed density, weed biomass, grain yield and nutrient removal by weed in dry direct seeded rice (Oryza sativa L.) cultivars. Int J Chem Stud 2018;6(3):1311-1316.
