evaluation of growth traits and yield of new forage corn (zea mays l.) single cross combinations

in this study 18 forage corn (zea mays l.) hybrid varieties were evaluated based on rcbd with four replications in khorasan razavi agricultural and natural resources research centre, iran, on 2008-2009. result of analysis of variance showed that there was significantly difference between hybrids in forage yield, ear weight and ear to biomass ratio. results of hybrids mean comparison with duncan’s multiple range test showed that sc700 was higher than other investigated hybrids in forage yield trait. but hybrid 3 with 85.31 forage yield was the best hybrid in weight of ear and ear to biomass ratio. though the sc704 hybrid was better than others for stem dry weight, ear dry weight and leaf area but there was not any significant difference between this hybrid and hybrid 3.