Effect of weed-control measures on yield, weed control, economics and energetics of rice (Oryza sativa)-wheat (Triticum aestivum) cropping system

摘要: An experiment was conducted during 2010–11 and 2011–12 at Bilaspur, Chhattisgarh, to assess the effect of weed-control measures on grain yield, weed control efficiency (WCE) economics rice (Oryza sativa L.)wheat [Triticum aestivum (L.) emend. Fiori & Paol.] cropping system. Application pyrazosalfuron @ 0.02 kg/ha as pre-emergence + fenoxoprop-p-ethyl 0.06 (25 days after sowing) post-emergence resulted in significantly higher yield (5.7 t/ha), (76.3%) net returns ( 41,800/ha) over other weed-management practices adopted rice. In case wheat, highest (5.5 36,200/ha) (89.6%) obtained with application sulfosulfuron 0.025 post-emergence. The energy productivity (0.426 kg/MJ) observed due pyrazosulfuron fenoxoprop post emergence rice, while wheat (0.490 recorded applied treatments.