EFFECT OF PLANT POPULATION DENSITY AND WEED MANAGEMENT REGIME ON WEED DYNAMICS, CROP PERFORMANCE AND PROFITABILITY OF BASMATI RICE (Oryza Sativa L.)

ROOP KISHORE¹, ASHISH DWIVEDI²*, RAGHUVIR SINGH³, PRIYANKA BANKOTI⁴, VINEET KUMAR⁵, MANOJ KUMAR⁶, THANESHWAR^7
1Department of Agronomy, Doon (P.G.) College of Agric. Science & Technology (Affiliation - HNB Garhwal University),Deharadun, 248 001, Uttrakhand
²Department of Agronomy, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut, U.P., 250110, India
³Department of Agronomy, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut, U.P., 250110, India
⁴Department of Agronomy, Shri Guru Ram Rai (P.G) Collage Dehradun, Uttrakhand
⁵Department of Agronomy, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut, U.P., 250110, India
⁶Department of Agriculture Extension, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut, U.P., 250110, India
⁷Department of Agronomy, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut, U.P., 250110, India
* Corresponding Author : ashishdwivedi842@gmail.com

Received : 04-11-2015     Accepted : 10-12-2015     Published : 21-12-2015
Volume : 7     Issue : 14       Pages : 896 - 902
Int J Agr Sci 7.14 (2015):896-902

Keywords : Basmati Rice, Crop Performance, Economics, Indo-Gangetic Plain Population Density, Weed Management Regimes and Weed Dynamics
Academic Editor : Siham Tellah, Prof Dr Agr Hans-werner Olfs, C. Ortiz, Anders Stockmarr
Conflict of Interest : None declared
Acknowledgements/Funding : None declared
Author Contribution : None declared

World spends considerable time and money each year in combating weed problems and protecting ecosystems. Invasive weeds are among the most serious threats to Indian's natural environment and production of rice by producing large numbers of seeds, assisting their spread and are often excellent ability to surviving and reproducing in disturbed environments. As a result a field experiment was carried out during kharif seasons of 2009 and 2010 at CRC of SVPUA&T, Meerut in a RBD with 3 replications by using F test. Experimental results revealed that 50 hills m-2 proved superior over 20 hills m-2 in respect of suppressing weed density and weed dry weight along with enhancing average plant height, yield attributes viz., number of filled and unfilled grain and grain weight panicle-1and biological yields (81.9 q ha-1) and nitrogen (0.83 %), phosphorus (0.35 %) and potassium contents (0.85%) in weeds followed by hills 40, 30 and 20 m-2. As far as weed management practices is concern, both chemical and mechanical methods of weed control were found superior over weedy check. The lowest weed density, dry weight and highest weed control efficiency, while maximum yield contributing traits, biological yield (83.4 q ha-1), production efficiency (27.9 kg ha-1) and economic efficiency (300.4 Rs. ha1) was recorded with two hand weedings which was on par with Butachlor @ 1.0 Kg ha-1fb one hand weeding over rest of the weed management practices.