Abstract

The weakness of germination is one of the problems facing Zea mays. It also seems to be a major reason for the low productivity of the crop from feed and grains. The size of the seed was the most important factor influencing the evidence. The present study was conducted to determine the effect of seed sizes and activation factors on the germination and growth of zee mays. To perform this study, three sizes of large, medium and small seeds and different activating factors were selected. To conduct this experiment, three ways were used: seeds soaked in distilled water for 8 hours, seeds sown in distilled water for 10 hours and seeds dipped in warm water for 20 seconds at 70°C. The results of this study revealed that the primed seed soaked KCL at 4% concentration for 12 hours in a volume, of 1 liter achieved the highest germination rate (96.1%) with a root length of (12.2 mm), feather length of (13.3 mg) ) and dry weight of seedlings of (13.4 mg), whereas in the treatment of small non-treated seeds, the mean score was (69.8%), (6.5 mm), (8.3 mm) and (9.8 mg).