东北地区多种在春季开花的观赏性植物，如：杏、梨等植物，进入花蕾期的时间要比紫丁香晚，但进入未花期的时间却比紫丁香早。
The bud time of the other spring ornamentals such as apricot and pear is later than lilac but the end time of florescence is earlier than lilac.
经试验可知花期喷洒一定浓度的赤霉素可使香梨花不脱萼或晚脱萼。
The treatments of spraying GA could not shed calyx to the flowers or defer shed calyx.
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