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光合作用是一切生命活动的物质基础和能量的主要来源。一般作物的干物质中有90—95％来自光合产物。茶树是多年生常绿叶用植物,以摘采芽叶为主要生产目的。茶树芽叶既是采收对象,又是行光合作用的重要营养器官。因此,茶树叶片光合能力的大小,对于产量的形成关系极为密切。茶树属耐阴植物,光饱和点低,光能利用率也就低。据报导,一般光能利用率在1％左右,即使亩产千斤的高产茶园,光能利用率也未超过3％。如何从提高光能利用率,以挖掘增产潜力,便成为茶树栽培工作者十分关注的课题。
Photosynthesis is the material basis of all life activities and the main source of energy. 90-95% of the dry matter of a typical crop comes from photosynthate. Tea tree is perennial evergreen leaves plants, pick pick leaves as the main production purposes. Tea tree shoots are both harvested objects, but also an important vegetative organs of photosynthesis. Therefore, the size of photosynthetic capacity of tea leaves, the formation of the yield is very closely related. Tea tree shade-tolerant plants, light saturation point is low, light energy utilization is low. It is reported that the general utilization of light energy is about 1%, even if high-yielding tea yield per kilogram, light energy utilization rate did not exceed 3%. How to improve the utilization rate of light energy to tap the potential for increasing yield has become a topic of great concern to tea plantation workers.