Effects of sowing dates on yield and yield components of two Maize (Zea mays L.) genotypes

Abstract

S. N. Al-SadoonCollege of Agriculture / University of Al-AnbarAbstractA field trial was conducted at the field crop station of IPA Agricultural Research Center in Abu-Ghraib during the autumn seasons of 2000 and 2001. The objective was to study the effect of sowing dates on yield and yield components of two maize genotypes. A split plot arrangement in a randomize complete block design with three replications was followed. Planting dates (1st , 15th and 30th July) were assigned in the main plots, Where as the two genotypes (IPA 3001 and Buhooth 106) were assigned to the sub plots. Results showed that sowing plants on 15th July gene the highest ear length (18.3 cm), row number per ear (17.3 row), weight of 1000 kernels (346.7 gm) and total grain yield (9.3 t/ha). Results also showed that the hybrid IPA 3001 gave the highest ear length (18.9 cm), row number per ear (17.7row), weight of 1000 kernels (341.7 gm) and total grain yield (9.6 t/ha). Where as the lowest values of the above mentioned characteristics were found in Buhooth 106 plants. The hybrid IPA 3001 plants produced the highest grain yield per hectare (10.4 t / ha) by sowing during mid July.