Effect of grain moisture of corn at harvesting on some agronomic traits

الملخص EN

This research was conducted during spring and fall seasons, 2015 , at the fields of Field Crop Department – College of Agriculture –University of Baghdad .

The objective was to study the effect of grain moisture at harvesting on some agronomic traits of the corn next generation , by using synthetic variety 5018 .

In spring season 2015 , seeds of this variety was planted ,when moisture of the ear grains was (37-42%) , ten ears were harvested.

Ear harvesting dates were performed manually when the grains had 37-42 % , 34-36 % , 30-33 % , 25- 28 % and 19-22 % moisture content.

In fall season 2015 , varietal trail was carried out to the five treatment materials , using Randomized Complete Bock Design , with four replicates.

The results revealed , that non significant differences between treatments (19-22) % and (25- 28)% , in all the studied traits .

The plants grown from the seeds of (25-28)%, were produced highest vegetative mass (116.30 g.plant-1) total dray matter (269 g.

plant-1) and total dray matter ( 1.80 kg.m-2) Highest grain yield ( 1.07 kg.m-2) and harvesting index ( 0.63) were produced from plants grown from seeds harvested with (19-22) % moisture content .

It can be concluded that the best moisture contents of the grains for seed production was (19-28) %.