Effects of plant density and sowing season spring and summer on quantitative characteristics and yield of corn

This experiment was conducted to study the effect of plant density and sowing season spring and Summer on quantitative characteristics and yield of corn (704 maize hybrids), Split-plot arrangement in randomized block design with three replications was used and during 2015 in Andimeshk. The different densities of 65, 75, 85 and 95 thousand plant per hectare was considered as main plots and sowing season in two levels sowing Spring (25 March) and sowing Summer (21 July) were randomized in sub-plots. Results showed that The effect of plant density on was significant in all the tested characters exception The number of active leaves and leaf fag. The effect season sowing on traits such as number of active leaves, leaf fag and 1000 grain weight were not significant. with of plant density increasing from 65 to 75 thousand plant per hectare increased fresh forage yield, but in densities Above was decreased. The highest grain yield in density of 65 thousand plant per hectare and Related was to sowing Summer. based on the findings of this experiment and in order to achieve the highest fresh forage yield in sowing spring and the plant density of 85 thousand plant per hectare in the Khuzestan and other regions with similar ecological conditions are recommended.