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对生姜不同叶位叶片光合特性研究表明，中位叶光合速率（Ｐｎ）最高，其次为下位叶，上位嫩叶最低。生姜不同叶位叶的光补偿点在１８４６～３０８２μｍｏｌ／ｍ２·ｓ间，中位叶＞上位叶＞下位叶；光饱和点为６２４８～８２７６μｍｌｏ／ｍ２·ｓ，中位叶＞下位叶＞上位叶。生姜叶片的ＣＯ２补偿点为２９６～１６３８μｌ／Ｌ，饱和点为１４９９～１５８２μｌ／Ｌ，中位叶最低，下位叶次之，上位叶最高。生姜叶片Ｐｎ日变化呈一双峰曲线，第１次高峰出现在９：００，第２次高峰在１３：００～１４：００。第１侧枝叶的Ｐｎ明显大于主枝叶的Ｐｎ。
The photosynthetic characteristics of leaves at different leaf positions in Ginger showed that the photosynthetic rate (Pn) of middle leaves was the highest, followed by the lower leaves and the upper leaves were the lowest. The light compensation points of leaves at different leaf positions of ginger ranged from 1846 to 3082 μmol / m2 · s, and the median leaves> the upper leaves> the lower leaves. The light saturation points were 6248 ~ 8276 μmlo / m2 · s, Position leaves> lower leaves> upper leaves. The CO2 compensation point of ginger leaves was 296 ~ 1638 μl / L, and the saturation point was 1499 ~ 1582 μl / L. The middle leaves were the lowest, the lower leaves were the second, and the upper leaves were the highest. The diurnal changes of Pn in ginger leaves showed a bimodal curve with the first peak at 9:00 and the second peak at 13: 00-14: 00. The Pn of the first branch was significantly larger than the Pn of the main branch.