n.光周期

The plants in the greenhouse respond to photoperiod, growing longer stems under longer days of light.
温室里的植物对光照周期有反应，在长日照下茎会长得更长。
Photoperiodism is a crucial factor in regulating flowering time in many plants.
光照周期是许多植物调控开花时间的关键因素。
The study found that birds' migration patterns were influenced by the photoperiod changes in the seasons.
研究发现，鸟类的迁徙模式受到季节中光照周期变化的影响。
Short-day photoperiod triggers the production of chlorophyll in certain species, preparing them for winter dormancy.
对于某些物种来说，短日照的光照周期会触发叶绿素的产生，使它们为冬眠做准备。
Many animals exhibit circannual rhythms, like changing fur color or breeding, in response to photoperiod variations.
许多动物会根据光照周期的变化展现出年周期性的生理节奏，比如换毛或繁殖。
Photoperiod-sensitive crops, like lettuce, need a specific number of hours of darkness to initiate flowering.
对光照周期敏感的作物，如生菜，需要特定时长的黑暗来启动开花过程。
In some regions, farmers manipulate photoperiod to synchronize crop growth with the local planting season.
在一些地区，农民会调整光照周期以使农作物的生长与当地的种植季节同步。
Artificial lighting can be used to extend the growing season for plants, by controlling photoperiod in greenhouses.
人工照明可以用来延长植物的生长季节，通过在温室中调控光照周期。
The Arctic fox's fur changes color in response to the photoperiod, becoming darker during winter months when daylight is scarce.
北极狐的皮毛颜色会随着光照周期变化，冬季日照不足时，皮毛会变暗。
Scientists are researching how different species adapt to changing photoperiods due to climate change.
科学家正在研究不同物种如何适应因气候变化而改变的光照周期。