很多自然现象,例如植物的生长发育、开花结果,候鸟的秋去春来,霜雪的出现与消失,河流的冰封与解冻等,都在不同程度上受气候的支配,这种现象叫物候现象。出现某一物候现象的日期叫物候期,如树木的发芽、发叶、花蕾出现、开花、果熟、叶变色、落叶等开始日期,动物的始见、绝见、始鸣、终鸣、换毛等的日期。物侯期的到来,是温度、日照、降水、湿度等因素综合作用的结果,其中与气温 Many natural phenomena, such as the growth and development of plants, the flowering result, the autumn and spring of migratory birds, the appearance and disappearance of frost and snow, the freezing and thawing of rivers, etc. are all controlled by the climate to some extent. This phenomenon is called phenophase . The phenomenal appearance of a date is called the phenophase, such as the germination of trees, leaves, buds appear, flowering, fruit ripening, leaf discoloration, deciduous and other start date, animal see, never seen, Ming Ming, Ming Ming, change Wool and other dates. The advent of the Houwu period is the result of the combined effects of temperature, sunshine, precipitation and humidity, among others, the temperature