بررسی کارآیی جوانه زنی و بنیه بذر اندازه های مختلف بذر ذرت هیبرید سینگل کراس704

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With respect to the fact that in maize seed processing factories, the seeds pass through standard sieves comprise about 15-16% of the total production, in years facing with insufficient seed production it is possible to produce feed stuff from these seeds, especially in non stressful areas. In order to study various maize seed sizes germination and vigor efficiency in laboratory, this study was carried out in 2010 in the seed analysis laboratory of seed and plant certification & registration institute in Karaj. For this purpose germination and vigor indices of flat, medium and round maize seed shapes and the seeds pass through the standard sieves were compared in seed standard germination (SGT) and cold vigor tests (CVT). The difference of germination percentage of various seed shapes in CVT were significant, while in SGT there was not any significant difference between germination percentage of various seed shapes. Totally germination percentage of SGT was higher than CVT. Nevertheless root, shoot and plant length, dry and wet weight, and seedling length and weight vigor indices of the seeds pass through standard sieves in SGT were significantly less than other seed shapes. Germination percentage, root, shoot and plant length, dry and wet weight, and seedling length and weight vigor indices of the seeds pass through standard sieves in CVT were significantly less than flat, medium and round seed shapes.