在生物界中普遍存在着“物候”现象。所谓“物候”,主要是指动植物的生长、发育、活动规律与非生物的变化对节候的反应。植物的冬芽萌动、抽叶、开花、结实、落叶;动物的蛰眠、复苏、始鸣、交配、繁育、换毛、迁徒等都与节候密切关系。我们经常看到的如青蛙冬眠春醒、燕子春来秋往,雄鸡报晓啼唱、牵牛花黎明开放等等都 In the biological world, there is a common phenomenon of “phenology.” The so-called “phenology”, mainly refers to the growth of animals and plants, development, activity patterns and abiotic changes in the response to the climate. Winter buds of plants germinate, drawing leaves, blooming, strong, deciduous; animal dormant, resuscitation, Ming Ming, mating, breeding, hair removal, migration and so on are closely related to the age of the genus. We often see such as the frog hibernation spring awakening, swallows fall to the spring, the rooster announces sing, Morning Glory dawn open and so on