Abstract: The experiments have been made by spraying uniconazole during the common wet growing seedlings, two-stage growing seedlings, growing seedlings in green house and dry growing seedlings respectively. Results showed that the tillering, chhorophyll content of leaves, root ability and the effective spike at later growing stage would increase by treatment with uniconazole of 100 mg/L ( during one leaf stage for wet growing seedlings ), spraying with 100 mg/L ( during one leaf stage for tow-stage growing seedings ...