| Popis: |
An experiment was conducted for two consecutive years at College Farm, College of Agriculture, Rajendranagar, Hyderabad during kharif 2009 and 2010 to study the response of hybrid rice to organic sources and fertilizer levels. The experiment was laid out in split plot design with three replications. The treatments included organic sources (No organic manuring control, subabul incorporation @ 5 t ha-1, rice straw incorporation @ 2.5 t ha-1) as main plot treatments and fertilizer levels comprising of N:K2O kg ha -1 (150:75, 175:50, 175:25, 200:50, 200:25, 225:0) as sub plot treatments. Among the organic sources, incorporation of subabul @ 5 t ha-1 recorded the highest dry matter production, grain yield and phosphorus uptake. Among the fertilizer levels tested, 200:50 N:K2O kg ha -1 was found the best fertilizer level in recording the highest dry matter production, grain yield and phosphorus uptake and was found significantly superior to remaining fertilizer levels. Interaction effect between organic sources and fertilizer levels was found significant on dry matter production, grain yield, phosphorus uptake at tillering, 50% flowering, panicle initiation stage and phosphorus uptake by grain. Subabul incorporation @ 5 t ha-1 + 200:50 N:K2O kg ha -1 recorded the highest dry matter production, grain yield, phosphorus uptake at tillering, 50% flowering, panicle initiation stage and phosphorus uptake by grain and remained on par with subabul incorporation @ 5 t ha-1 + 200:25 N:K2O kg ha |
