ANBAR JOURNAL OF AGRICULTURAL SCIENCES

Abstract

A field trail was carried out at field of college of Agriculture –University of Anbar Abu-Grhraib in two seasons fall of 2015 and spring season of 2016 to study the effect of seed size 6-6.5,7-7.5,8-85 mm, on some traits of growth and yield of maize cultivars Almaha, Sarah, Baghdad and Fajr. The treatments represented according to Randomize Completely Block Design with split plot arrangement. Cultivars were occupied the main plots, whereas seeds size were occupied the sub plot in three replicates. Size grading of maize to different sizes.
The large seed size gave highest mean of field emergence percent in spring season; it gave s field speed emergence in two seasons, least days, for a thesis and silking, highest mean for plant height, leaf area, leaf area index, dry weight for plant, kernels number per plant in fall season. It gives highest mean for 300 kernel weight, total yield per plant, and protein and oil percentage in both growing seasons. Genotypes showed significant difference in most studied traits in both growing seasons. Sarah plants were spent significantly superior, and gave highest mean of field emergence percentage in both seasons, while Almaha, are the lowest mean of days for an thesis in both seasons, and the lowest mean days to silking in spring season and the lowest mean for leaf area and for leaf area index in both growing seasons, and the lowest mean for kernel number per plant in fall season and the lowest mean for 300 kernel weight for grain yield per plant in both growing seasons. Whereas Baghdad plants gave the highest, mean of plant weight, dry height in both seasons. Accordingly, we recommend to grade seeds and select larger the 8-8.5 mm size for planting or to improve the seed germination of synthivars cultivars seeds with low viability,of planting Almaha. Seed because itwas the best in field emergence, growth and grain yield.