Abstract:

Study on the photosynthetic diurnal variation characteristics of Syzygium hancei Merr.et perry seedings through the filter media of two different culture，including sea sand culture and river sand culture. The results showed that photosynthetic rate, transpiration rate and stomatal conductance of Syzygium hancei Merr.et perry seedlings in the environment of sea sand are greater than in the environment of river sand. Photosynthetic rate and stomatal conductance have shown "peaks" of the trend curve, and the first peak is greater than the second peak in both the environment. Transpiration rate of the seedings is a "wave" in the trend of decreasing curve.