The Storage And Distribution Of Non-structural Carbohydrate Of Common Species Seedlings At Tiantong National Forest Park

This article mainly chose15species of plants common seedlings at Tiantong, measured photosynthetic light response curves、plant biomass、non-structural carbohydrate(NSC) content and N、P content in different seasons. We used life forms to form groups,then calculated their seasonal variations, Pearson correlation between NSC and photosynthesis characteristics、Pearson correlation between NSC and N、P content. We studied the difference of all parameters in different seasons, then used SPSS17.0to calculate Pearson correlation between NSC and photosynthesis characteristics, between NSC and N、P. The results followed:(1) The difference of NSC storage is significant in different seasons. The NSC storage is highest in spring, followed by in summer, and finally in fall. Formed different groups by life form, NSC storage is significant different in3seasons. NSC storage is higher in spring than in summer, higher in spring than in autumn. Deciduous species have the same law. There is no significant difference when life forms are unlike.(2) All plants separate into4groups:evergreen trees、evergreen shrubs、deciduous trees、deciduous shrubs. Soluble sugar content of roots of trees has no significant difference in seasons. Soluble sugar content of stems of evergreen trees is significant higher in spring and in summer than in fall, so do evergreen shrubs and deciduous trees. Soluble sugar content of leaves of evergreen species is significant higher in autumn than in summer, and there is no significant difference in leaves of deciduous species between seasons. Soluble sugar content of leaves of evergreen trees is significant higher in autumn than in spring. Soluble sugar content of stems of deciduous shrubs is significant higher in spring than in autumn. Starch content of roots、stems、leaves of evergreen species are all significant higher in spring than in summer, and significant higher in summer than in autumn, so do Starch content of stems and leaves of deciduous species. But starch content of roots of evergreen shrubs has no significant difference in seasons and starch content of roots of deciduous species is significant higher in spring than in fall, and significant higher in summer than in autumn. There is no significant difference in different life forms. NSC content is higher in roots than in stems and leaves, higher in leaves than in stems. The roots biomass ratio of most plants are significant higher in autumn than in spring, the stems biomass ratio of most plants are significant higher in summer than in autumn. There is no significant difference in LMR、SLA、SMR、RMR between evergreen and deciduous species.(3) Non-structural carbohydrate (NSC) content has relationship with LCP and AQE. NSC content. LCP show significant positive correlation and NSC content. AQE show significant negative correlation when plants are evergreen trees. Starch content of roots, NSC content of roots, soluble sugar content of stems and LCP show significant positive correlation when plants are deciduous trees, soluble sugar and starch content of roots and AQE show significant negative correlation. Soluble sugar content of roots^stems, starch content、NSC content of stems, LCP show significant positive correlation; starch content、NSC content of stems, AQE show significant negative correlation when plants are evergreen shrubs.(4) Soluble sugar content of roots, starch content of leaves, NSC content of leaves and P content of corresponding organs show significant negative correlation when plants are evergreen species. So do soluble sugar、starch、NSC content of roots when plants are deciduous species.