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菊花是典型的短日照植物,在生长期内进行遮光处理,可以提前开花,催花措施如下:一、作短日照处理的菊花应选择生长势旺盛、无病虫害的优良品种菊苗。在定头后的顶芽生长期内,分期施用2～3次0.2%的矮壮素,每隔15～20天施一次,防止徒长。二、若要求在10月上旬开花的菊花,可在8月上旬至8月中旬作遮光处理(开花前45～55天),从开始遮光到现蕾开花,每天连续黑暗时间从14小时逐步增加到18小时,严密遮光(没有闪光,连续遮光不能间断)。处理期气温保持在30℃以下。否则,不能形成花芽,催花无效。
Chrysanthemum is a typical short-day plants, shading treatment during the growing season, you can flowering in advance, reminders flowers are as follows: First, short-day treatment of chrysanthemum should choose strong growth potential, no pests and diseases of fine varieties of seedlings. In the fixed head after the bud growth period, staged application of 2 to 3 times 0.2% of CCC, every 15 to 20 days to be applied once to prevent leggy. (2) Chrysanthemums requiring flowering in early October can be shaded from the beginning of August to the middle of August (45-55 days before flowering), from the beginning of shading to budding and flowering. The continuous dark time increases gradually from 14 hours per day To 18 hours, close shading (no flash, continuous shading can not be interrupted). During the treatment period the temperature is kept below 30 ℃. Otherwise, can not form flower buds, reminder flower invalid.