Photosynthesis is the essence of all plant life (autotrophic production) and hence of all animal life (heterotrophic production) on the planet Earth.

• 光合作用率大小由气候、光照强度与时间、有效叶面积、土壤可用养分、温度、二氧化碳浓度、土壤含水量等因素决定。