Comparative Study of Strawberry(Fragaria ananassa Duchesne) Leaves Photosynthetic Capacity at Different Ages

[Objective] The essay aims to find out the photosynthetic characteristics of Zhangji strawberry leaves at different ages,and provide a theoretical basis for its high yield and good quality cultivation in protective cultivation.[Method] The photo synthetic parameters of Zhangji Strawberry in facility environment were determined,and the amount of chlorophyll in the leaves was compared.[Result] The results showed the photosynthetic rate of strawberry leaves appeared to be a sine wave in one day.At noon,the nap of new leaves was more obvious than that of the other leaves.The response trend of photosynthesis of leaves with different folia ages was more or less the same,in other words,the brighter the sunshine was,the bigger the photosynthetic rate was.According to the result,the photosynthetic rate of function leaves in brighter sunshine was obviously bigger than that of new or older leaves.The average photosynthetic rate of function leaves in the daytime was 7.93 μmol/(m2·s),and the new leaves was 5.24 μmol/(m2·s),while the older leaves was 3.54 μmol/(m2·s).The amount of chlorophyll of function leaves was more and consistene with its strong photosynthetic capacity.[Conclusion] The photosynthetic capacity of function leaves is bigger than that of new leaves and older leaves.