Study on non-structural carbohydrates of common speciesseedlings of evergreen broad-leaved forest in Liuxihe

In order to study the interspecific differences and allocation pattern of non-structural carbohydrate（ NSC） among roots，stems and leaves and its component about common species seedlings of evergreen broadleaved forest，15 common species seedlings of evergreen broadleaved forest in Liuxihe Forest Park were investigated. The concentration of soluble sugar，starch，NSC and the ratio of soluble sugar and starch of roots，stems and leaves were studied. The results showed that significant differences were found among species and significant interaction was existed among species and plant organs（ P< 0.05）. 15 seedlings of common species generally showed that the content of soluble sugar and the ratio of soluble sugar and starch of leaves were the highest，while the starch and NSC content of roots were the biggest. There was no significant difference of NSC and its component in roots and leaves of tree seedling and shrub seedlings. There was no significant difference of soluble sugar and NSC content in stems of tree and shrub seedlings. But the ratio of soluble sugar and starch in stems of tree was significant higher than that of shrub，while its starch content was significant lower than shrub. Interspecific differences and allocation pattern of non-structural carbohydrate for seedlings of common species in evergreen broadleaved forest reflected that leaves and roots of plants seedlings were the synthesis and storage structure of NSC，which could provide nutrients for the growth and development of plants. Also，it reflected their different survival strategies to deal with the environment.