茶树的越冬叶片,是茶树春季光合作用的主要担负者。春季荫发前和萌发初期,茶树完全依靠越冬叶片进行光合作用,甚至到了夏茶萌发的春末,越冬叶片仍然占有一定的叶面积比例,并有光合产物的输出。因此,越冬叶片是春季茶树生长和春茶产量形成的重要物质基础。试验对越冬叶片春季光合速率的变化测定结果表明:1.树冠上层四叶越 The overwintering leaves of the tea tree are the main contributors to the spring photosynthesis of the tea tree. Before the spring shade and early germination, the tea tree relies entirely on the winter leaves for photosynthesis, even to the late spring germination of the late spring, the winter leaves still occupy a certain proportion of leaf area, and photosynthetic output. Therefore, the overwintering leaves is an important material basis for the growth of spring tea and the formation of spring tea. The results showed that the change of photosynthesis rate of overwintering leaves in spring showed that: 1.