Photo-ecological characteristics of the dominant plant species in the secondary forest surrounding Qiandao Lake,Zhejiang,China

In this study, we used a portable photosynthesis system to determine various physiological parameters associated with plant growth. We investigated the seasonal dynamics of the diurnal variations of photosynthesis, the responses to both light and CO super(2), and the relative chlorophyll content of the dominant plant species in the secondary forest surrounding Qiandao Lake, Zhejiang, China. The species included Pinus massoniana, Castanopsis sclerophylla, Lithocarpus glaber and Cyclobalanopsis glauca. The results showed the following. (1) Diurnal variations of the net photosynthesis rate (P sub(n)) of P. massoniana exhibited a monomodal curve in all four seasons, while the variations in P sub(n) for C. sclerophylla were bimodal in August but had a single curve in the other three time seasons investigated. The LSP and R sub(d) of C. glauca were the lowest, while the AQY of C. glauca was the highest in the four seasons. Photosynthetic characteristics of C. sclerophylla and L. glaber were moderate among the four species.